From: Sergey Matveev Date: Fri, 20 Nov 2020 16:32:00 +0000 (+0300) Subject: Initial commit X-Git-Tag: v0.2.0~15 X-Git-Url: http://www.git.cypherpunks.ru/?p=goredo.git;a=commitdiff_plain;h=f15fe27971bcf37a06bb9542ea1907f11444515a Initial commit --- f15fe27971bcf37a06bb9542ea1907f11444515a diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..2156cc9 --- /dev/null +++ b/.gitignore @@ -0,0 +1,8 @@ +/redo +/redo-always +/redo-cleanup +/redo-ifchange +/redo-ifcreate +/redo-log +/redo-stamp +/redo-whichdo diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..9a2708d --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. We, the Free Software Foundation, use the +GNU General Public License for most of our software; it applies also to +any other work released this way by its authors. You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +them if you wish), that you receive source code or can get it if you +want it, that you can change the software or use pieces of it in new +free programs, and that you know you can do these things. + + To protect your rights, we need to prevent others from denying you +these rights or asking you to surrender the rights. Therefore, you have +certain responsibilities if you distribute copies of the software, or if +you modify it: responsibilities to respect the freedom of others. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must pass on to the recipients the same +freedoms that you received. You must make sure that they, too, receive +or can get the source code. And you must show them these terms so they +know their rights. + + Developers that use the GNU GPL protect your rights with two steps: +(1) assert copyright on the software, and (2) offer you this License +giving you legal permission to copy, distribute and/or modify it. + + For the developers' and authors' protection, the GPL clearly explains +that there is no warranty for this free software. For both users' and +authors' sake, the GPL requires that modified versions be marked as +changed, so that their problems will not be attributed erroneously to +authors of previous versions. + + Some devices are designed to deny users access to install or run +modified versions of the software inside them, although the manufacturer +can do so. This is fundamentally incompatible with the aim of +protecting users' freedom to change the software. The systematic +pattern of such abuse occurs in the area of products for individuals to +use, which is precisely where it is most unacceptable. Therefore, we +have designed this version of the GPL to prohibit the practice for those +products. If such problems arise substantially in other domains, we +stand ready to extend this provision to those domains in future versions +of the GPL, as needed to protect the freedom of users. + + Finally, every program is threatened constantly by software patents. +States should not allow patents to restrict development and use of +software on general-purpose computers, but in those that do, we wish to +avoid the special danger that patents applied to a free program could +make it effectively proprietary. To prevent this, the GPL assures that +patents cannot be used to render the program non-free. + + The precise terms and conditions for copying, distribution and +modification follow. + + TERMS AND CONDITIONS + + 0. Definitions. + + "This License" refers to version 3 of the GNU General Public License. + + "Copyright" also means copyright-like laws that apply to other kinds of +works, such as semiconductor masks. + + "The Program" refers to any copyrightable work licensed under this +License. Each licensee is addressed as "you". "Licensees" and +"recipients" may be individuals or organizations. + + To "modify" a work means to copy from or adapt all or part of the work +in a fashion requiring copyright permission, other than the making of an +exact copy. The resulting work is called a "modified version" of the +earlier work or a work "based on" the earlier work. + + A "covered work" means either the unmodified Program or a work based +on the Program. + + To "propagate" a work means to do anything with it that, without +permission, would make you directly or secondarily liable for +infringement under applicable copyright law, except executing it on a +computer or modifying a private copy. Propagation includes copying, +distribution (with or without modification), making available to the +public, and in some countries other activities as well. + + To "convey" a work means any kind of propagation that enables other +parties to make or receive copies. Mere interaction with a user through +a computer network, with no transfer of a copy, is not conveying. + + An interactive user interface displays "Appropriate Legal Notices" +to the extent that it includes a convenient and prominently visible +feature that (1) displays an appropriate copyright notice, and (2) +tells the user that there is no warranty for the work (except to the +extent that warranties are provided), that licensees may convey the +work under this License, and how to view a copy of this License. If +the interface presents a list of user commands or options, such as a +menu, a prominent item in the list meets this criterion. + + 1. Source Code. + + The "source code" for a work means the preferred form of the work +for making modifications to it. "Object code" means any non-source +form of a work. + + A "Standard Interface" means an interface that either is an official +standard defined by a recognized standards body, or, in the case of +interfaces specified for a particular programming language, one that +is widely used among developers working in that language. + + The "System Libraries" of an executable work include anything, other +than the work as a whole, that (a) is included in the normal form of +packaging a Major Component, but which is not part of that Major +Component, and (b) serves only to enable use of the work with that +Major Component, or to implement a Standard Interface for which an +implementation is available to the public in source code form. A +"Major Component", in this context, means a major essential component +(kernel, window system, and so on) of the specific operating system +(if any) on which the executable work runs, or a compiler used to +produce the work, or an object code interpreter used to run it. + + The "Corresponding Source" for a work in object code form means all +the source code needed to generate, install, and (for an executable +work) run the object code and to modify the work, including scripts to +control those activities. However, it does not include the work's +System Libraries, or general-purpose tools or generally available free +programs which are used unmodified in performing those activities but +which are not part of the work. For example, Corresponding Source +includes interface definition files associated with source files for +the work, and the source code for shared libraries and dynamically +linked subprograms that the work is specifically designed to require, +such as by intimate data communication or control flow between those +subprograms and other parts of the work. + + The Corresponding Source need not include anything that users +can regenerate automatically from other parts of the Corresponding +Source. + + The Corresponding Source for a work in source code form is that +same work. + + 2. Basic Permissions. + + All rights granted under this License are granted for the term of +copyright on the Program, and are irrevocable provided the stated +conditions are met. This License explicitly affirms your unlimited +permission to run the unmodified Program. The output from running a +covered work is covered by this License only if the output, given its +content, constitutes a covered work. This License acknowledges your +rights of fair use or other equivalent, as provided by copyright law. + + You may make, run and propagate covered works that you do not +convey, without conditions so long as your license otherwise remains +in force. You may convey covered works to others for the sole purpose +of having them make modifications exclusively for you, or provide you +with facilities for running those works, provided that you comply with +the terms of this License in conveying all material for which you do +not control copyright. Those thus making or running the covered works +for you must do so exclusively on your behalf, under your direction +and control, on terms that prohibit them from making any copies of +your copyrighted material outside their relationship with you. + + Conveying under any other circumstances is permitted solely under +the conditions stated below. Sublicensing is not allowed; section 10 +makes it unnecessary. + + 3. Protecting Users' Legal Rights From Anti-Circumvention Law. + + No covered work shall be deemed part of an effective technological +measure under any applicable law fulfilling obligations under article +11 of the WIPO copyright treaty adopted on 20 December 1996, or +similar laws prohibiting or restricting circumvention of such +measures. + + When you convey a covered work, you waive any legal power to forbid +circumvention of technological measures to the extent such circumvention +is effected by exercising rights under this License with respect to +the covered work, and you disclaim any intention to limit operation or +modification of the work as a means of enforcing, against the work's +users, your or third parties' legal rights to forbid circumvention of +technological measures. + + 4. Conveying Verbatim Copies. + + You may convey verbatim copies of the Program's source code as you +receive it, in any medium, provided that you conspicuously and +appropriately publish on each copy an appropriate copyright notice; +keep intact all notices stating that this License and any +non-permissive terms added in accord with section 7 apply to the code; +keep intact all notices of the absence of any warranty; and give all +recipients a copy of this License along with the Program. + + You may charge any price or no price for each copy that you convey, +and you may offer support or warranty protection for a fee. + + 5. Conveying Modified Source Versions. + + You may convey a work based on the Program, or the modifications to +produce it from the Program, in the form of source code under the +terms of section 4, provided that you also meet all of these conditions: + + a) The work must carry prominent notices stating that you modified + it, and giving a relevant date. + + b) The work must carry prominent notices stating that it is + released under this License and any conditions added under section + 7. This requirement modifies the requirement in section 4 to + "keep intact all notices". + + c) You must license the entire work, as a whole, under this + License to anyone who comes into possession of a copy. This + License will therefore apply, along with any applicable section 7 + additional terms, to the whole of the work, and all its parts, + regardless of how they are packaged. This License gives no + permission to license the work in any other way, but it does not + invalidate such permission if you have separately received it. + + d) If the work has interactive user interfaces, each must display + Appropriate Legal Notices; however, if the Program has interactive + interfaces that do not display Appropriate Legal Notices, your + work need not make them do so. + + A compilation of a covered work with other separate and independent +works, which are not by their nature extensions of the covered work, +and which are not combined with it such as to form a larger program, +in or on a volume of a storage or distribution medium, is called an +"aggregate" if the compilation and its resulting copyright are not +used to limit the access or legal rights of the compilation's users +beyond what the individual works permit. Inclusion of a covered work +in an aggregate does not cause this License to apply to the other +parts of the aggregate. + + 6. Conveying Non-Source Forms. + + You may convey a covered work in object code form under the terms +of sections 4 and 5, provided that you also convey the +machine-readable Corresponding Source under the terms of this License, +in one of these ways: + + a) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by the + Corresponding Source fixed on a durable physical medium + customarily used for software interchange. + + b) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by a + written offer, valid for at least three years and valid for as + long as you offer spare parts or customer support for that product + model, to give anyone who possesses the object code either (1) a + copy of the Corresponding Source for all the software in the + product that is covered by this License, on a durable physical + medium customarily used for software interchange, for a price no + more than your reasonable cost of physically performing this + conveying of source, or (2) access to copy the + Corresponding Source from a network server at no charge. + + c) Convey individual copies of the object code with a copy of the + written offer to provide the Corresponding Source. This + alternative is allowed only occasionally and noncommercially, and + only if you received the object code with such an offer, in accord + with subsection 6b. + + d) Convey the object code by offering access from a designated + place (gratis or for a charge), and offer equivalent access to the + Corresponding Source in the same way through the same place at no + further charge. You need not require recipients to copy the + Corresponding Source along with the object code. If the place to + copy the object code is a network server, the Corresponding Source + may be on a different server (operated by you or a third party) + that supports equivalent copying facilities, provided you maintain + clear directions next to the object code saying where to find the + Corresponding Source. Regardless of what server hosts the + Corresponding Source, you remain obligated to ensure that it is + available for as long as needed to satisfy these requirements. + + e) Convey the object code using peer-to-peer transmission, provided + you inform other peers where the object code and Corresponding + Source of the work are being offered to the general public at no + charge under subsection 6d. + + A separable portion of the object code, whose source code is excluded +from the Corresponding Source as a System Library, need not be +included in conveying the object code work. + + A "User Product" is either (1) a "consumer product", which means any +tangible personal property which is normally used for personal, family, +or household purposes, or (2) anything designed or sold for incorporation +into a dwelling. In determining whether a product is a consumer product, +doubtful cases shall be resolved in favor of coverage. For a particular +product received by a particular user, "normally used" refers to a +typical or common use of that class of product, regardless of the status +of the particular user or of the way in which the particular user +actually uses, or expects or is expected to use, the product. A product +is a consumer product regardless of whether the product has substantial +commercial, industrial or non-consumer uses, unless such uses represent +the only significant mode of use of the product. + + "Installation Information" for a User Product means any methods, +procedures, authorization keys, or other information required to install +and execute modified versions of a covered work in that User Product from +a modified version of its Corresponding Source. The information must +suffice to ensure that the continued functioning of the modified object +code is in no case prevented or interfered with solely because +modification has been made. + + If you convey an object code work under this section in, or with, or +specifically for use in, a User Product, and the conveying occurs as +part of a transaction in which the right of possession and use of the +User Product is transferred to the recipient in perpetuity or for a +fixed term (regardless of how the transaction is characterized), the +Corresponding Source conveyed under this section must be accompanied +by the Installation Information. But this requirement does not apply +if neither you nor any third party retains the ability to install +modified object code on the User Product (for example, the work has +been installed in ROM). + + The requirement to provide Installation Information does not include a +requirement to continue to provide support service, warranty, or updates +for a work that has been modified or installed by the recipient, or for +the User Product in which it has been modified or installed. Access to a +network may be denied when the modification itself materially and +adversely affects the operation of the network or violates the rules and +protocols for communication across the network. + + Corresponding Source conveyed, and Installation Information provided, +in accord with this section must be in a format that is publicly +documented (and with an implementation available to the public in +source code form), and must require no special password or key for +unpacking, reading or copying. + + 7. Additional Terms. + + "Additional permissions" are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. +Additional permissions that are applicable to the entire Program shall +be treated as though they were included in this License, to the extent +that they are valid under applicable law. If additional permissions +apply only to part of the Program, that part may be used separately +under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + + When you convey a copy of a covered work, you may at your option +remove any additional permissions from that copy, or from any part of +it. (Additional permissions may be written to require their own +removal in certain cases when you modify the work.) You may place +additional permissions on material, added by you to a covered work, +for which you have or can give appropriate copyright permission. + + Notwithstanding any other provision of this License, for material you +add to a covered work, you may (if authorized by the copyright holders of +that material) supplement the terms of this License with terms: + + a) Disclaiming warranty or limiting liability differently from the + terms of sections 15 and 16 of this License; or + + b) Requiring preservation of specified reasonable legal notices or + author attributions in that material or in the Appropriate Legal + Notices displayed by works containing it; or + + c) Prohibiting misrepresentation of the origin of that material, or + requiring that modified versions of such material be marked in + reasonable ways as different from the original version; or + + d) Limiting the use for publicity purposes of names of licensors or + authors of the material; or + + e) Declining to grant rights under trademark law for use of some + trade names, trademarks, or service marks; or + + f) Requiring indemnification of licensors and authors of that + material by anyone who conveys the material (or modified versions of + it) with contractual assumptions of liability to the recipient, for + any liability that these contractual assumptions directly impose on + those licensors and authors. + + All other non-permissive additional terms are considered "further +restrictions" within the meaning of section 10. If the Program as you +received it, or any part of it, contains a notice stating that it is +governed by this License along with a term that is a further +restriction, you may remove that term. If a license document contains +a further restriction but permits relicensing or conveying under this +License, you may add to a covered work material governed by the terms +of that license document, provided that the further restriction does +not survive such relicensing or conveying. + + If you add terms to a covered work in accord with this section, you +must place, in the relevant source files, a statement of the +additional terms that apply to those files, or a notice indicating +where to find the applicable terms. + + Additional terms, permissive or non-permissive, may be stated in the +form of a separately written license, or stated as exceptions; +the above requirements apply either way. + + 8. Termination. + + You may not propagate or modify a covered work except as expressly +provided under this License. Any attempt otherwise to propagate or +modify it is void, and will automatically terminate your rights under +this License (including any patent licenses granted under the third +paragraph of section 11). + + However, if you cease all violation of this License, then your +license from a particular copyright holder is reinstated (a) +provisionally, unless and until the copyright holder explicitly and +finally terminates your license, and (b) permanently, if the copyright +holder fails to notify you of the violation by some reasonable means +prior to 60 days after the cessation. + + Moreover, your license from a particular copyright holder is +reinstated permanently if the copyright holder notifies you of the +violation by some reasonable means, this is the first time you have +received notice of violation of this License (for any work) from that +copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + + Termination of your rights under this section does not terminate the +licenses of parties who have received copies or rights from you under +this License. If your rights have been terminated and not permanently +reinstated, you do not qualify to receive new licenses for the same +material under section 10. + + 9. Acceptance Not Required for Having Copies. + + You are not required to accept this License in order to receive or +run a copy of the Program. Ancillary propagation of a covered work +occurring solely as a consequence of using peer-to-peer transmission +to receive a copy likewise does not require acceptance. However, +nothing other than this License grants you permission to propagate or +modify any covered work. These actions infringe copyright if you do +not accept this License. Therefore, by modifying or propagating a +covered work, you indicate your acceptance of this License to do so. + + 10. Automatic Licensing of Downstream Recipients. + + Each time you convey a covered work, the recipient automatically +receives a license from the original licensors, to run, modify and +propagate that work, subject to this License. You are not responsible +for enforcing compliance by third parties with this License. + + An "entity transaction" is a transaction transferring control of an +organization, or substantially all assets of one, or subdividing an +organization, or merging organizations. If propagation of a covered +work results from an entity transaction, each party to that +transaction who receives a copy of the work also receives whatever +licenses to the work the party's predecessor in interest had or could +give under the previous paragraph, plus a right to possession of the +Corresponding Source of the work from the predecessor in interest, if +the predecessor has it or can get it with reasonable efforts. + + You may not impose any further restrictions on the exercise of the +rights granted or affirmed under this License. For example, you may +not impose a license fee, royalty, or other charge for exercise of +rights granted under this License, and you may not initiate litigation +(including a cross-claim or counterclaim in a lawsuit) alleging that +any patent claim is infringed by making, using, selling, offering for +sale, or importing the Program or any portion of it. + + 11. Patents. + + A "contributor" is a copyright holder who authorizes use under this +License of the Program or a work on which the Program is based. The +work thus licensed is called the contributor's "contributor version". + + A contributor's "essential patent claims" are all patent claims +owned or controlled by the contributor, whether already acquired or +hereafter acquired, that would be infringed by some manner, permitted +by this License, of making, using, or selling its contributor version, +but do not include claims that would be infringed only as a +consequence of further modification of the contributor version. For +purposes of this definition, "control" includes the right to grant +patent sublicenses in a manner consistent with the requirements of +this License. + + Each contributor grants you a non-exclusive, worldwide, royalty-free +patent license under the contributor's essential patent claims, to +make, use, sell, offer for sale, import and otherwise run, modify and +propagate the contents of its contributor version. + + In the following three paragraphs, a "patent license" is any express +agreement or commitment, however denominated, not to enforce a patent +(such as an express permission to practice a patent or covenant not to +sue for patent infringement). To "grant" such a patent license to a +party means to make such an agreement or commitment not to enforce a +patent against the party. + + If you convey a covered work, knowingly relying on a patent license, +and the Corresponding Source of the work is not available for anyone +to copy, free of charge and under the terms of this License, through a +publicly available network server or other readily accessible means, +then you must either (1) cause the Corresponding Source to be so +available, or (2) arrange to deprive yourself of the benefit of the +patent license for this particular work, or (3) arrange, in a manner +consistent with the requirements of this License, to extend the patent +license to downstream recipients. "Knowingly relying" means you have +actual knowledge that, but for the patent license, your conveying the +covered work in a country, or your recipient's use of the covered work +in a country, would infringe one or more identifiable patents in that +country that you have reason to believe are valid. + + If, pursuant to or in connection with a single transaction or +arrangement, you convey, or propagate by procuring conveyance of, a +covered work, and grant a patent license to some of the parties +receiving the covered work authorizing them to use, propagate, modify +or convey a specific copy of the covered work, then the patent license +you grant is automatically extended to all recipients of the covered +work and works based on it. + + A patent license is "discriminatory" if it does not include within +the scope of its coverage, prohibits the exercise of, or is +conditioned on the non-exercise of one or more of the rights that are +specifically granted under this License. You may not convey a covered +work if you are a party to an arrangement with a third party that is +in the business of distributing software, under which you make payment +to the third party based on the extent of your activity of conveying +the work, and under which the third party grants, to any of the +parties who would receive the covered work from you, a discriminatory +patent license (a) in connection with copies of the covered work +conveyed by you (or copies made from those copies), or (b) primarily +for and in connection with specific products or compilations that +contain the covered work, unless you entered into that arrangement, +or that patent license was granted, prior to 28 March 2007. + + Nothing in this License shall be construed as excluding or limiting +any implied license or other defenses to infringement that may +otherwise be available to you under applicable patent law. + + 12. No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. Use with the GNU Affero General Public License. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU Affero General Public License into a single +combined work, and to convey the resulting work. The terms of this +License will continue to apply to the part which is the covered work, +but the special requirements of the GNU Affero General Public License, +section 13, concerning interaction through a network will apply to the +combination as such. + + 14. Revised Versions of this License. + + The Free Software Foundation may publish revised and/or new versions of +the GNU General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + + Each version is given a distinguishing version number. If the +Program specifies that a certain numbered version of the GNU General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README b/README new file mode 100644 index 0000000..db2222e --- /dev/null +++ b/README @@ -0,0 +1,120 @@ +*goredo* redo implementation on pure Go + +OVERVIEW *goredo-overview* + +This is pure Go implementation of DJB's redo (http://cr.yp.to/redo.html) +build system proposal. Originally it was just a rewrite of redo-c +(https://github.com/leahneukirchen/redo-c), but later most features of +apenwarr/redo (https://redo.readthedocs.io/en/latest/) were also +implemented. Why yet another implementation? It is feature full and has +better performance comparing to shell and Python implementation. +goredo is free software: see the file COPYING for copying conditions. + +INSTALL *goredo-install* + +Either: > + $ go get go.cypherpunks.ru/goredo + $ goredo -symlinks + $ export PATH=`pwd`:$PATH +or: > + $ git clone git://git.cypherpunks.ru/goredo.git + $ cd goredo + $ go build + $ ./goredo -symlinks + $ export PATH=`pwd`:$PATH +< +NOTES *goredo-notes* + +* "all" target is used by default +* stdout is always captured, but no target is created if it was empty +* empty targets are considered always out of date +* .do's arguments are relative paths +* .do search goes up to / by default, but can be limited with either + REDO_TOP_DIR environment variable, or by having .redo/top file in it +* executable .do is run as is +* shebangless .do is run with /bin/sh -e[x] + +FEATURES *goredo-features* + +* explicit check that stdout and $3 are not written simultaneously +* explicit check (similar to apenwarr/redo's one) that generated target + was not modified "externally" outside the redo, preventing its + overwriting, but continuing the build +* targets, dependency information and their directories are explicitly + synced (can be disabled, should work faster) +* file's change is detected by comparing its ctime and, if it differs, + its BLAKE2b hash. Hash checking is done to prevent false positives + (can be disabled, will work faster) +* files creation is umask-friendly (unlike mkstemp() used in redo-c) +* coloured messages (can be disabled) +* verbose debug messages, including out-of-date determination, PIDs, + lock acquirings/releases +* parallel build with jobs limit, optionally in infinite mode +* optional display of each target's execution time +* each target's stderr can be displayed with the PID +* target's stderr can be stored on the disk with TAI64N timestamp + prefixes for each line (you can use tai64nlocal utility from + daemontools (http://cr.yp.to/daemontools/tai64nlocal.html) to convert + them to local time). Captures can be viewed any time later + +COMMANDS *goredo-commands* + +* redo-ifchange, redo-ifcreate, redo-always (useful with redo-stamp) +* redo -- same as redo-ifchange, but forcefully and *sequentially* run + specified targets +* redo-log -- display TAI64N timestamped last stderr of the target +* redo-stamp -- record stamp dependency and consider it non out-of-date + if stamp equals to the previous one +* redo-cleanup -- removes either temporary, or log files, or + everything related to goredo +* redo-whichdo -- .do search paths for specified target (similar to + apenwarr/redo): > + $ redo-whichdo x/y/a.b.o + x/y/a.b.o.do + x/y/default.b.o.do + x/y/default.o.do + x/y/default.do + x/default.b.o.do + x/default.o.do + x/default.do + default.b.o.do + default.o.do + default.do + ../default.b.o.do + ../default.o.do +< +STATE *goredo-state* + +Dependency and build state is kept inside .redo subdirectory in each +directory touched related the build. Each corresponding target has its +own, recreated with every rebuild, .dep file. It is recfile +(https://www.gnu.org/software/recutils/), that could have various +dependency information (dep.rec with the schema included): > + + Build: 80143f04-bfff-4673-950c-081d712f573d + + Type: ifcreate + Target: foo.o.do + + Type: ifchange + Target: default.o.do + Ctime: 1605721341.253305000 + Hash: f4929732f96f11e6d4ebe94536b5edef426d00ed0146853e37a87f4295e18eda + + Type: always + + Type: stamp + Hash: 5bbdf635932cb16b9127e69b6f3872577efed338f0a4ab6f2c7ca3df6ce50cc9 +< +LICENCE~ + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + + vim: filetype=help diff --git a/cleanup.go b/cleanup.go new file mode 100644 index 0000000..a98510d --- /dev/null +++ b/cleanup.go @@ -0,0 +1,132 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +package main + +import ( + "fmt" + "io" + "log" + "os" + "path" + "path/filepath" + "strings" +) + +const ( + CleanupFull = "full" + CleanupLog = "log" + CleanupTmp = "tmp" +) + +func redoDirClean(root, what string) error { + root, err := filepath.Abs(root) + if err != nil { + panic(err) + } + dir, err := os.Open(root) + if err != nil { + return err + } + for { + fis, err := dir.Readdir(1 << 10) + if err != nil { + if err == io.EOF { + break + } + return err + } + var pth string + for _, fi := range fis { + pth, err = filepath.Rel(Cwd, path.Join(root, fi.Name())) + if err != nil { + panic(err) + } + switch what { + case CleanupLog: + if strings.HasSuffix(fi.Name(), LogSuffix) { + fmt.Println(pth) + if err = os.Remove(pth); err != nil { + return err + } + } + case CleanupTmp: + if strings.HasPrefix(fi.Name(), TmpPrefix) { + fmt.Println(pth) + if err = os.Remove(pth); err != nil { + return err + } + } + default: + log.Fatalln("unknown cleanup target") + } + } + } + return dir.Close() +} + +func cleanupWalker(root, what string) error { + root, err := filepath.Abs(root) + if err != nil { + panic(err) + } + dir, err := os.Open(root) + if err != nil { + return err + } + defer dir.Close() + for { + fis, err := dir.Readdir(1 << 10) + if err != nil { + if err == io.EOF { + break + } + return err + } + var pth string + for _, fi := range fis { + pth, err = filepath.Rel(Cwd, path.Join(root, fi.Name())) + if err != nil { + panic(err) + } + if fi.IsDir() { + if fi.Name() == RedoDir { + if what == CleanupFull { + fmt.Println(pth) + err = os.RemoveAll(pth) + } else { + err = redoDirClean(pth, what) + } + } else { + err = cleanupWalker(pth, what) + } + if err != nil { + return err + } + continue + } + if (what == CleanupTmp || what == CleanupFull) && + strings.HasPrefix(fi.Name(), TmpPrefix) { + fmt.Println(pth) + if err = os.Remove(pth); err != nil { + return err + } + } + } + } + return dir.Close() +} diff --git a/dep.go b/dep.go new file mode 100644 index 0000000..8749f09 --- /dev/null +++ b/dep.go @@ -0,0 +1,143 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +// Dependencies saver + +package main + +import ( + "bufio" + "encoding/hex" + "fmt" + "io" + "os" + "path" + "strings" + "syscall" + + "go.cypherpunks.ru/recfile" + "golang.org/x/crypto/blake2b" +) + +func recfileWrite(fdDep *os.File, fields ...recfile.Field) error { + w := recfile.NewWriter(fdDep) + if _, err := w.RecordStart(); err != nil { + return err + } + if _, err := w.WriteFields(fields...); err != nil { + return err + } + return nil +} + +func ifcreate(fdDep *os.File, tgt string) error { + trace(CDebug, "ifcreate: %s <- %s", fdDep.Name(), tgt) + return recfileWrite( + fdDep, + recfile.Field{Name: "Type", Value: "ifcreate"}, + recfile.Field{Name: "Target", Value: tgt}, + ) +} + +func always(fdDep *os.File) error { + trace(CDebug, "always: %s", fdDep.Name()) + return recfileWrite(fdDep, recfile.Field{Name: "Type", Value: "always"}) +} + +func stamp(fdDep, src *os.File) error { + var hsh string + hsh, err := fileHash(os.Stdin) + if err != nil { + return err + } + trace(CDebug, "stamp: %s <- %s", fdDep.Name(), hsh) + return recfileWrite( + fdDep, + recfile.Field{Name: "Type", Value: "stamp"}, + recfile.Field{Name: "Hash", Value: hsh}, + ) +} + +func fileCtime(fd *os.File) (string, error) { + fi, err := fd.Stat() + if err != nil { + return "", err + } + stat := fi.Sys().(*syscall.Stat_t) + sec, nsec := stat.Ctimespec.Unix() + return fmt.Sprintf("%d.%d", sec, nsec), nil +} + +func fileHash(fd *os.File) (string, error) { + h, err := blake2b.New256(nil) + if err != nil { + panic(err) + } + if _, err = io.Copy(h, bufio.NewReader(fd)); err != nil { + return "", err + } + return hex.EncodeToString(h.Sum(nil)), nil +} + +func writeDep(fdDep *os.File, cwd, tgt string) error { + trace(CDebug, "ifchange: %s <- %s", fdDep.Name(), tgt) + fd, err := os.Open(path.Join(cwd, tgt)) + if err != nil { + return err + } + defer fd.Close() + ts, err := fileCtime(fd) + if err != nil { + return err + } + fields := []recfile.Field{ + recfile.Field{Name: "Type", Value: "ifchange"}, + recfile.Field{Name: "Target", Value: tgt}, + recfile.Field{Name: "Ctime", Value: ts}, + } + var hsh string + if !NoHash { + hsh, err = fileHash(fd) + if err != nil { + return err + } + fields = append(fields, recfile.Field{Name: "Hash", Value: hsh}) + } + err = recfileWrite(fdDep, fields...) + return err +} + +func writeDeps(fdDep *os.File, tgts []string) error { + if fdDep == nil { + trace(CDebug, "no opened fdDep: %s", tgts) + return nil + } + ups := []string{} + upLevels := strings.Count(os.Getenv(RedoDirPrefixEnv), "/") + for i := 0; i < upLevels; i++ { + ups = append(ups, "..") + } + up := path.Join(ups...) + for _, tgt := range tgts { + if _, err := os.Stat(tgt); err == nil { + if err = writeDep(fdDep, Cwd, path.Join(up, tgt)); err != nil { + return err + } + } + } + return nil +} diff --git a/dep.rec b/dep.rec new file mode 100644 index 0000000..2691201 --- /dev/null +++ b/dep.rec @@ -0,0 +1,11 @@ +%rec: Build +%doc: Build session +%mandatory: Build +%type: Build uuid + +%rec: Dependency +%doc: Dependency information +%mandatory: Type +%type: Type enum ifcreate ifchange always stamp +%type: Ctime regexp /\d+\.\d+/ +%type: Hash regexp /[0-9a-f]{64}/ diff --git a/do.go b/do.go new file mode 100644 index 0000000..a2f95bf --- /dev/null +++ b/do.go @@ -0,0 +1,95 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +// .do finder + +package main + +import ( + "os" + "path" + "path/filepath" + "strings" +) + +const TopFile = "top" + +var TopDir string + +func existsDo(fdDep *os.File, cwd, pth string) (bool, error) { + if _, err := os.Stat(path.Join(cwd, pth)); err == nil { + return true, nil + } + return false, ifcreate(fdDep, pth) +} + +func findDo(fdDep *os.File, cwd, tgt string) (string, int, error) { + doFile := tgt + ".do" + exists, err := existsDo(fdDep, cwd, doFile) + if err != nil { + return "", 0, err + } + if exists { + return doFile, 0, nil + } + levels := []string{} + extsOrig := strings.Split(tgt, ".")[1:] + dirAbsPrev := "" + for { + exts := extsOrig + updir := path.Join(levels...) + for len(exts) > 0 { + doFile = strings.Join(append( + []string{"default"}, append(exts, "do")..., + ), ".") + pth := path.Join(updir, doFile) + exists, err = existsDo(fdDep, cwd, pth) + if err != nil { + return "", 0, err + } + if exists { + return doFile, len(levels), nil + } + exts = exts[1:] + } + doFile = "default.do" + pth := path.Join(updir, doFile) + exists, err = existsDo(fdDep, cwd, pth) + if err != nil { + return "", 0, err + } + if exists { + return pth, len(levels), nil + } + levels = append(levels, "..") + dirAbs, err := filepath.Abs(updir) + if err != nil { + panic(err) + } + if dirAbs == TopDir { + break + } + if _, err = os.Stat(path.Join(dirAbs, RedoDir, TopFile)); err == nil { + break + } + if dirAbs == dirAbsPrev { + break + } + dirAbsPrev = dirAbs + } + return "", 0, nil +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..734dcaf --- /dev/null +++ b/go.mod @@ -0,0 +1,9 @@ +module go.cypherpunks.ru/goredo + +go 1.14 + +require ( + go.cypherpunks.ru/recfile v0.3.0 + golang.org/x/crypto v0.0.0-20201117144127-c1f2f97bffc9 + golang.org/x/sys v0.0.0-20201117222635-ba5294a509c7 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..c1902a0 --- /dev/null +++ b/go.sum @@ -0,0 +1,12 @@ +go.cypherpunks.ru/recfile v0.3.0 h1:aZRMMst8hoNOIhGjCA/VxjTN5VBSEN4W4zyhWF/7xSU= +go.cypherpunks.ru/recfile v0.3.0/go.mod h1:p1ZUMeyQQbQg+ICtKH3+Zt59QLI0tCZYZj/75Vp1buk= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/crypto v0.0.0-20201117144127-c1f2f97bffc9 h1:phUcVbl53swtrUN8kQEXFhUxPlIlWyBfKmidCu7P95o= +golang.org/x/crypto v0.0.0-20201117144127-c1f2f97bffc9/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I= +golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20201117222635-ba5294a509c7 h1:s330+6z/Ko3J0o6rvOcwXe5nzs7UT9tLKHoOXYn6uE0= +golang.org/x/sys v0.0.0-20201117222635-ba5294a509c7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= diff --git a/js.go b/js.go new file mode 100644 index 0000000..ab1190e --- /dev/null +++ b/js.go @@ -0,0 +1,77 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +// Jobserver + +package main + +import "os" + +var ( + JSR *os.File + JSW *os.File +) + +func jsInit() { + jsrRaw := os.Getenv(RedoJSRFdEnv) + jswRaw := os.Getenv(RedoJSWFdEnv) + if (jsrRaw == "" && jswRaw != "") || (jsrRaw != "" && jswRaw == "") { + panic("both JSR and JSW must be set") + } + if jsrRaw == "NO" { + // infinite jobs + return + } + if jsrRaw != "" { + JSR = mustParseFd(jsrRaw, "JSR") + JSW = mustParseFd(jswRaw, "JSW") + jsRelease() + return + } + if *JobsN == 0 { + // infinite jobs + return + } + var err error + JSR, JSW, err = os.Pipe() + if err != nil { + panic(err) + } + for i := uint(0); i < *JobsN; i++ { + jsRelease() + } +} + +func jsRelease() { + if JSW == nil { + return + } + trace(CJS, "release") + if n, err := JSW.Write([]byte{0}); err != nil || n != 1 { + panic("can not write JSW") + } +} + +func jsAcquire() { + if JSR == nil { + return + } + trace(CJS, "acquire") + if n, err := JSR.Read([]byte{0}); err != nil || n != 1 { + panic("can not read JSR") + } +} diff --git a/log.go b/log.go new file mode 100644 index 0000000..8669a64 --- /dev/null +++ b/log.go @@ -0,0 +1,105 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +// Logging facilities + +package main + +import ( + "fmt" + "os" + "strings" +) + +const ( + CReset = "\033[0m" + CBold = "\033[1m" + CBlack = "\033[30;1m" + CRed = "\033[31;1m" + CGreen = "\033[32;1m" + CYellow = "\033[33;1m" + CBlue = "\033[34;1m" + CMagenta = "\033[35;1m" + CCyan = "\033[36;1m" + CWhite = "\033[37;1m" + + CDebug = CYellow + CRedo = CGreen + CDone = CBlue + CLock = CCyan + CErr = CRed + CWarn = CMagenta + CJS = CWhite + CNone = "NONE" +) + +var ( + NoColor bool + Debug bool + LogDone bool + LogLock bool + LogJS bool + MyPid int +) + +func trace(level, format string, args ...interface{}) { + var p string + if MyPid != 0 { + p = fmt.Sprintf("[%d] ", MyPid) + } + switch level { + case CNone: + os.Stderr.WriteString(StderrPrefix + p + fmt.Sprintf(format+"\n", args...)) + return + case CDebug: + if !Debug { + return + } + p += "dbg " + case CRedo: + p += "redo " + case CDone: + if !(LogDone || Debug) { + return + } + p += "done " + case CLock: + if !(LogLock || Debug) { + return + } + p += "lock " + case CJS: + if !(LogJS || Debug) { + return + } + p += "js " + case CErr: + p += "err " + case CWarn: + p += "warn " + } + msg := fmt.Sprintf(format, args...) + msg = StderrPrefix + colourize(level, p+strings.Repeat(". ", Level)+msg) + os.Stderr.WriteString(msg + "\n") +} + +func colourize(colour, s string) string { + if NoColor { + return s + } + return colour + s + CReset +} diff --git a/main.go b/main.go new file mode 100644 index 0000000..df9296f --- /dev/null +++ b/main.go @@ -0,0 +1,353 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +package main + +import ( + "crypto/rand" + "flag" + "fmt" + "io" + "io/ioutil" + "log" + "os" + "path" + "path/filepath" + "strconv" + "sync" + + "go.cypherpunks.ru/recfile" + "golang.org/x/sys/unix" +) + +const ( + RedoLevelEnv = "REDO_LEVEL" + RedoDepFdEnv = "REDO_DEP_FD" + RedoDirPrefixEnv = "REDO_DIRPREFIX" + RedoBuildUUIDEnv = "REDO_BUILD_UUID" + RedoStderrPrefixEnv = "REDO_STDERR_PREFIX" + RedoJSRFdEnv = "REDO_JSR_FD" + RedoJSWFdEnv = "REDO_JSW_FD" +) + +var ( + Level = 0 + Trace bool = false + Force bool = false + NoHash bool = false + NoSync bool = false + Cwd string + Jobs sync.WaitGroup + + JobsN = flag.Uint("j", 1, "number of parallel jobs (0 for infinite)") + + StderrKeep bool = false + StderrSilent bool = false + StderrPrefix string + + BuildUUID string + IsMaster bool = false +) + +func mustSetenv(key, value string) { + if err := os.Setenv(key, value); err != nil { + panic(err) + } +} + +func mustParseFd(v, name string) *os.File { + ptr, err := strconv.ParseUint(v, 10, 64) + if err != nil { + panic(err) + } + fd := os.NewFile(uintptr(ptr), name) + if fd == nil { + panic("can not parse fd: " + name) + } + return fd +} + +func ifchange(tgts []string) (bool, error) { + jsInit() + defer Jobs.Wait() + defer jsAcquire() + errs := make(chan error, len(tgts)) + jobs := 0 + ok := true + var err error + for _, tgt := range tgts { + var ood bool + if Force { + ood = true + } else { + ood, err = isOOD(Cwd, tgt, 0) + if err != nil { + return false, err + } + } + if !ood { + continue + } + if isSrc(Cwd, tgt) { + trace(CDebug, "%s is source", tgt) + continue + } + if err = runScript(tgt, errs); err != nil { + return false, err + } + if Force { + // Sequentially run jobs + err = <-errs + Jobs.Wait() + if err != nil { + trace(CErr, "%s", err) + return false, nil + } + continue + } + jobs++ + } + for i := 0; i < jobs; i++ { + if err = <-errs; err != nil { + ok = false + trace(CErr, "%s", err) + } + } + return ok, nil +} + +func main() { + xflag := flag.Bool("x", false, "trace current target (sh -x) (set REDO_TRACE=1 for others too)") + stderrKeep := flag.Bool("stderr-keep", false, "keep job's stderr (REDO_STDERR_KEEP=1)") + stderrSilent := flag.Bool("stderr-silent", false, "do not print job's stderr (REDO_STDERR_SILENT=1)") + debug := flag.Bool("debug", false, "enable debug logging (REDO_DEBUG=1)") + logDone := flag.Bool("log-done", false, "enable done messages logging (REDO_LOG_DONE=1)") + logLock := flag.Bool("log-lock", false, "enable lock messages logging (REDO_LOG_LOCK=1)") + logPid := flag.Bool("log-pid", false, "append PIDs (REDO_LOG_PID=1)") + logJS := flag.Bool("log-js", false, "enable jobserver messages logging (REDO_LOG_JS=1)") + version := flag.Bool("version", false, "print version") + warranty := flag.Bool("warranty", false, "print warranty information") + symlinks := flag.Bool("symlinks", false, "create necessary symlinks in current direcotyr") + + flag.Usage = usage + flag.Parse() + if *warranty { + fmt.Println(Warranty) + return + } + if *version { + fmt.Println(versionGet()) + return + } + if *symlinks { + for _, cmdName := range []string{ + "redo", + "redo-always", + "redo-cleanup", + "redo-ifchange", + "redo-ifcreate", + "redo-log", + "redo-stamp", + "redo-whichdo", + } { + if err := os.Symlink(os.Args[0], cmdName); err != nil { + log.Fatalln(err) + } + } + return + } + log.SetFlags(0) + + var err error + Cwd, err = unix.Getwd() + if err != nil { + panic(err) + } + + NoColor = os.Getenv("NO_COLOR") != "" + NoHash = os.Getenv("REDO_NO_HASH") == "1" + NoSync = os.Getenv("REDO_NO_SYNC") == "1" + + TopDir = os.Getenv("REDO_TOP_DIR") + if TopDir != "" { + TopDir, err = filepath.Abs(TopDir) + if err != nil { + panic(err) + } + } + + if *stderrKeep { + mustSetenv("REDO_STDERR_KEEP", "1") + } + if *stderrSilent { + mustSetenv("REDO_STDERR_SILENT", "1") + } + if *debug { + mustSetenv("REDO_DEBUG", "1") + } + if *logDone { + mustSetenv("REDO_LOG_DONE", "1") + } + if *logLock { + mustSetenv("REDO_LOG_LOCK", "1") + } + if *logPid { + mustSetenv("REDO_LOG_PID", "1") + } + if *logJS { + mustSetenv("REDO_LOG_JS", "1") + } + StderrKeep = os.Getenv("REDO_STDERR_KEEP") == "1" + StderrSilent = os.Getenv("REDO_STDERR_SILENT") == "1" + Debug = os.Getenv("REDO_DEBUG") == "1" + LogDone = os.Getenv("REDO_LOG_DONE") == "1" + LogLock = os.Getenv("REDO_LOG_LOCK") == "1" + LogJS = os.Getenv("REDO_LOG_JS") == "1" + if Debug || os.Getenv("REDO_LOG_PID") == "1" { + MyPid = os.Getpid() + } + if *xflag { + Trace = true + } else { + Trace = os.Getenv("REDO_TRACE") == "1" + } + + // Those are internal envs + StderrPrefix = os.Getenv(RedoStderrPrefixEnv) + if v := os.Getenv(RedoLevelEnv); v != "" { + level, err := strconv.ParseUint(v, 10, 64) + if err != nil { + panic(err) + } + Level = int(level) + } + var fdDep *os.File + if v := os.Getenv(RedoDepFdEnv); v != "" { + fdDep = mustParseFd(v, RedoDepFdEnv) + } + BuildUUID = os.Getenv(RedoBuildUUIDEnv) + if BuildUUID == "" { + IsMaster = true + raw := new([16]byte) + if _, err = io.ReadFull(rand.Reader, raw[:]); err != nil { + panic(err) + } + raw[6] = (raw[6] & 0x0F) | uint8(4<<4) // version 4 + BuildUUID = fmt.Sprintf( + "%x-%x-%x-%x-%x", + raw[0:4], raw[4:6], raw[6:8], raw[8:10], raw[10:], + ) + } + + tgts := flag.Args() + if len(tgts) == 0 { + tgts = []string{"all"} + } + ok := true + err = nil + cmdName := path.Base(os.Args[0]) + trace(CDebug, "[%s] run: %s %s [%s]", BuildUUID, cmdName, tgts, Cwd) + +CmdSwitch: + switch cmdName { + case "redo": + Force = true + ok, err = ifchange(tgts) + case "redo-ifchange": + ok, err = ifchange(tgts) + writeDeps(fdDep, tgts) + case "redo-ifcreate": + if fdDep == nil { + log.Fatalln("no", RedoDepFdEnv) + } + for _, tgt := range tgts { + err = ifcreate(fdDep, tgt) + if err != nil { + break + } + } + case "redo-always": + if fdDep == nil { + log.Fatalln("no", RedoDepFdEnv) + } + err = always(fdDep) + case "redo-cleanup": + for _, what := range tgts { + err = cleanupWalker(Cwd, what) + if err != nil { + break + } + } + case "redo-stamp": + if fdDep == nil { + log.Fatalln("no", RedoDepFdEnv) + } + err = stamp(fdDep, os.Stdin) + case "redo-log": + if len(tgts) != 1 { + log.Fatalln("single target expected") + } + d, t := cwdAndTgt(tgts[0]) + var fd *os.File + fd, err = os.Open(path.Join(d, RedoDir, t+LogSuffix)) + if err != nil { + break + } + _, err = io.Copy(os.Stdout, fd) + case "redo-whichdo": + if len(tgts) != 1 { + log.Fatalln("single target expected") + } + var fdTmp *os.File + fdTmp, err = ioutil.TempFile("", "") + if err != nil { + break + } + os.Remove(fdTmp.Name()) + var doFile string + cwd, tgt := cwdAndTgt(tgts[0]) + doFile, _, err = findDo(fdTmp, cwd, tgt) + if err != nil { + break + } + fdTmp.Seek(0, 0) + r := recfile.NewReader(fdTmp) + for { + m, err := r.NextMap() + if err != nil { + if err == io.EOF { + break + } + break CmdSwitch + } + rel, err := filepath.Rel(Cwd, path.Join(cwd, m["Target"])) + if err != nil { + panic(err) + } + fmt.Println(rel) + } + ok = doFile != "" + default: + log.Fatalln("unknown command", cmdName) + } + if err != nil { + log.Println(err) + } + if !ok || err != nil { + os.Exit(1) + } +} diff --git a/ood.go b/ood.go new file mode 100644 index 0000000..a7c2d22 --- /dev/null +++ b/ood.go @@ -0,0 +1,226 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +// Out-of-date determination + +package main + +import ( + "errors" + "fmt" + "io" + "os" + "path" + "path/filepath" + "strings" + + "go.cypherpunks.ru/recfile" +) + +func cwdAndTgt(tgt string) (string, string) { + cwd, tgt := path.Split(tgt) + cwd, err := filepath.Abs(cwd) + if err != nil { + panic(err) + } + return cwd, tgt +} + +func isSrc(cwd, tgt string) bool { + d, f := path.Split(path.Join(cwd, tgt)) + if _, err := os.Stat(path.Join(d, f)); err != nil { + return false + } + if _, err := os.Stat(path.Join(d, RedoDir, f+DepSuffix)); err == nil { + return false + } + return true +} + +func isBuiltNow(fdDep *os.File) (bool, *recfile.Reader, error) { + r := recfile.NewReader(fdDep) + m, err := r.NextMap() + if err != nil { + return false, nil, err + } + if m["Build"] == "" { + return false, r, errors.New("dep. missing Build:") + } + return m["Build"] == BuildUUID, r, nil +} + +func isOOD(cwd, tgt string, level int) (bool, error) { + tgtOrig := tgt + indent := strings.Repeat(". ", level) + trace(CDebug, "ood: %s%s checking", indent, tgtOrig) + cwd, tgt = cwdAndTgt(path.Join(cwd, tgt)) + depPath := path.Join(cwd, RedoDir, tgt+DepSuffix) + fdDep, err := os.Open(depPath) + if err != nil { + trace(CDebug, "ood: %s%s -> no dep: %s", indent, tgtOrig, depPath) + return true, nil + } + defer fdDep.Close() + ood := false + + builtNow, r, err := isBuiltNow(fdDep) + if err != nil { + return true, err + } + if builtNow { + trace(CDebug, "ood: %s%s -> already built", indent, tgtOrig) + return false, nil + } + + var stampOur string + for { + m, err := r.NextMap() + if err != nil { + if err == io.EOF { + break + } + return true, err + } + switch m["Type"] { + case "always": + trace(CDebug, "ood: %s%s -> always", indent, tgtOrig) + ood = true + case "ifcreate": + theirTgt := m["Target"] + if theirTgt == "" { + return ood, errors.New("invalid format of dep." + tgtOrig) + } + if _, err = os.Stat(path.Join(cwd, theirTgt)); err == nil { + trace(CDebug, "ood: %s%s -> created", indent, tgtOrig) + ood = true + } + case "ifchange": + dep := m["Target"] + theirTs := m["Ctime"] + theirHsh := m["Hash"] + if dep == "" || theirTs == "" { + return ood, errors.New("invalid format of dep." + tgtOrig) + } + trace(CDebug, "ood: %s%s -> %s: checking", indent, tgtOrig, dep) + fd, err := os.Open(path.Join(cwd, dep)) + if err != nil { + if os.IsNotExist(err) { + trace(CDebug, "ood: %s%s -> %s: not exists", indent, tgtOrig, dep) + ood = true + continue + } + return ood, err + } + defer fd.Close() + ts, err := fileCtime(fd) + if err != nil { + return ood, err + } + if theirTs == ts { + trace(CDebug, "ood: %s%s -> %s: same ctime", indent, tgtOrig, dep) + } else if NoHash || theirHsh == "" { + trace(CDebug, "ood: %s%s -> %s: ctime differs", indent, tgtOrig, dep) + ood = true + } else { + hsh, err := fileHash(fd) + if err != nil { + return ood, err + } + if theirHsh == hsh { + trace(CDebug, "ood: %s%s -> %s: same hash", indent, tgtOrig, dep) + } else { + trace(CDebug, "ood: %s%s -> %s: hash differs", indent, tgtOrig, dep) + ood = true + } + } + fd.Close() + if ood { + continue + } + if dep == tgt { + trace(CDebug, "ood: %s%s -> %s: same target", indent, tgtOrig, dep) + continue + } + if isSrc(cwd, dep) { + trace(CDebug, "ood: %s%s -> %s: is source", indent, tgtOrig, dep) + continue + } else { + depOod, err := isOOD(cwd, dep, level+1) + if depOod { + ood = true + trace(CDebug, "ood: %s%s -> %s: ood", indent, tgtOrig, dep) + } else { + trace(CDebug, "ood: %s%s -> %s: !ood", indent, tgtOrig, dep) + } + if err != nil { + return ood, err + } + } + case "stamp": + stampOur = m["Hash"] + trace(CDebug, "ood: %s%s -> stamped: %s", indent, tgtOrig, stampOur) + default: + return ood, errors.New("invalid format of dep." + tgtOrig) + } + } + if ood && stampOur != "" { + errs := make(chan error, 0) + trace(CDebug, "ood: %s%s running, because stamped", indent, tgtOrig) + relTgt, err := filepath.Rel(Cwd, path.Join(cwd, tgt)) + if err != nil { + return true, err + } + if err = runScript(relTgt, errs); err != nil { + return true, err + } + if err = <-errs; err != nil { + return true, err + } + fdDep, err := os.Open(depPath) + if err != nil { + return true, err + } + defer fdDep.Close() + builtNow, r, err := isBuiltNow(fdDep) + if err != nil { + return true, err + } + if !builtNow { + return true, fmt.Errorf("%s is not built", tgtOrig) + } + var stampTheir string + for { + m, err := r.NextMap() + if err != nil { + if err == io.EOF { + break + } + return true, err + } + if m["Type"] == "stamp" { + stampTheir = m["Hash"] + break + } + } + trace(CDebug, "ood: %s%s -> stamp: %s %s", indent, tgtOrig, stampOur, stampTheir) + if stampOur == stampTheir { + ood = false + } + } + trace(CDebug, "ood: %s%s: %v", indent, tgtOrig, ood) + return ood, nil +} diff --git a/run.go b/run.go new file mode 100644 index 0000000..36e18d2 --- /dev/null +++ b/run.go @@ -0,0 +1,485 @@ +/* +goredo -- redo implementation on pure Go +Copyright (C) 2020 Sergey Matveev + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see . +*/ + +// Targets runner + +package main + +import ( + "bufio" + "encoding/hex" + "errors" + "fmt" + "io" + "os" + "os/exec" + "path" + "strconv" + "strings" + "syscall" + "time" + + "go.cypherpunks.ru/recfile" + "golang.org/x/sys/unix" +) + +const ( + RedoDir = ".redo" + LockSuffix = ".lock" + DepSuffix = ".dep" + TmpPrefix = ".redo." + LogSuffix = ".log" +) + +func mkdirs(pth string) error { + if _, err := os.Stat(pth); err == nil { + return nil + } + return os.MkdirAll(pth, os.FileMode(0777)) +} + +func tempsuffix() string { + return strconv.FormatInt((time.Now().UnixNano()+int64(os.Getpid()))&0xFFFFFFFF, 16) +} + +func tempfile(dir, prefix string) (*os.File, error) { + // It respects umask, unlike ioutil.TempFile + name := path.Join(dir, TmpPrefix+prefix+"."+tempsuffix()) + return os.OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, os.FileMode(0666)) +} + +func isModified(cwd, redoDir, tgt string) (bool, error) { + fdDep, err := os.Open(path.Join(redoDir, tgt+DepSuffix)) + if err != nil { + if os.IsNotExist(err) { + return false, nil + } + return false, err + } + defer fdDep.Close() + r := recfile.NewReader(fdDep) + for { + m, err := r.NextMap() + if err != nil { + if err == io.EOF { + break + } + return false, err + } + if m["Target"] != tgt { + continue + } + fd, err := os.Open(path.Join(cwd, tgt)) + if err != nil { + if os.IsNotExist(err) { + return false, nil + } + return false, err + } + defer fd.Close() + ourTs, err := fileCtime(fd) + if err != nil { + return false, err + } + if ourTs != m["Ctime"] { + return true, nil + } + break + } + return false, nil +} + +func runScript(tgt string, errs chan error) error { + tgtOrig := tgt + cwd, tgt := cwdAndTgt(tgt) + redoDir := path.Join(cwd, RedoDir) + errf := func(err error) error { + return fmt.Errorf("%s: %s", tgtOrig, err) + } + if err := mkdirs(redoDir); err != nil { + return errf(err) + } + + // Acquire lock + fdLock, err := os.OpenFile( + path.Join(redoDir, "lock."+tgt), + os.O_WRONLY|os.O_TRUNC|os.O_CREATE, + os.FileMode(0666), + ) + if err != nil { + return errf(err) + } + lockRelease := func() { + trace(CLock, "LOCK_UN: %s", fdLock.Name()) + unix.Flock(int(fdLock.Fd()), unix.LOCK_UN) + fdLock.Close() + } + trace(CLock, "LOCK_NB: %s", fdLock.Name()) + if err = unix.Flock(int(fdLock.Fd()), unix.LOCK_EX|unix.LOCK_NB); err != nil { + if uintptr(err.(syscall.Errno)) != uintptr(unix.EWOULDBLOCK) { + fdLock.Close() + return errf(err) + } + trace(CDebug, "waiting: %s", tgtOrig) + Jobs.Add(1) + go func() { + defer Jobs.Done() + trace(CLock, "LOCK_EX: %s", fdLock.Name()) + unix.Flock(int(fdLock.Fd()), unix.LOCK_EX) + lockRelease() + trace(CDebug, "waiting done: %s", tgtOrig) + var builtNow bool + fdDep, err := os.Open(path.Join(redoDir, tgt+DepSuffix)) + if err != nil { + if os.IsNotExist(err) { + err = fmt.Errorf("%s is not built", tgtOrig) + } + goto Finish + } + builtNow, _, err = isBuiltNow(fdDep) + if err != nil { + goto Finish + } + if !builtNow { + err = fmt.Errorf("%s is not built", tgtOrig) + } + Finish: + if err != nil { + err = errf(err) + } + errs <- err + }() + return nil + } + + // Check if target is not modified externally + modified, err := isModified(cwd, redoDir, tgt) + if err != nil { + lockRelease() + return errf(err) + } + if modified { + trace(CWarn, "%s externally modified: not redoing", tgtOrig) + lockRelease() + Jobs.Add(1) + go func() { + errs <- nil + Jobs.Done() + }() + return nil + } + + // Start preparing dep. + fdDep, err := tempfile(redoDir, tgt+DepSuffix) + if err != nil { + lockRelease() + return errf(err) + } + cleanup := func() { + lockRelease() + fdDep.Close() + os.Remove(fdDep.Name()) + } + if _, err = recfile.NewWriter(fdDep).WriteFields( + recfile.Field{Name: "Build", Value: BuildUUID}, + ); err != nil { + cleanup() + return errf(err) + } + + // Find .do + doFile, upLevels, err := findDo(fdDep, cwd, tgt) + if err != nil { + cleanup() + return errf(err) + } + if doFile == "" { + cleanup() + return errf(errors.New("no .do found")) + } + if err = writeDep(fdDep, cwd, doFile); err != nil { + cleanup() + return errf(err) + } + + // Determine basename and DIRPREFIX + ents := strings.Split(cwd, "/") + ents = ents[len(ents)-upLevels:] + dirPrefix := path.Join(ents...) + cwdOrig := cwd + for i := 0; i < upLevels; i++ { + cwd = path.Join(cwd, "..") + } + cwd = path.Clean(cwd) + basename := tgt + if strings.HasPrefix(doFile, "default.") { + basename = tgt[:len(tgt)-(len(doFile)-len("default.")-len(".do"))-1] + trace(CRedo, "%s (%s)", tgtOrig, doFile) + } else { + trace(CRedo, "%s", tgtOrig) + } + doFile = path.Base(doFile) + + // Prepare command line + var cmdName string + var args []string + if err = unix.Access(path.Join(cwd, doFile), unix.X_OK); err == nil { + // Ordinary executable file + cmdName = doFile + args = make([]string, 0, 3) + } else { + fd, err := os.Open(path.Join(cwd, doFile)) + if err != nil { + cleanup() + return errf(err) + } + buf := make([]byte, 512) + n, err := fd.Read(buf) + if err != nil { + cleanup() + return errf(err) + } + if n > 3 && string(buf[:3]) == "#!/" { + // Shebanged + t := string(buf[2:n]) + nlIdx := strings.Index(t, "\n") + if nlIdx == -1 { + cleanup() + return errf(errors.New("not fully read shebang")) + } + args = strings.Split(t[:nlIdx], " ") + cmdName, args = args[0], args[1:] + } else { + // Shell + cmdName = "/bin/sh" + if Trace { + args = append(args, "-ex") + } else { + args = append(args, "-e") + } + } + args = append(args, doFile) + } + + // Temporary file for stdout + fdStdout, err := tempfile(cwd, tgt) + if err != nil { + cleanup() + return errf(err) + } + tmpPath := fdStdout.Name() + ".3" // and for $3 + args = append(args, tgt, basename, path.Base(tmpPath)) + + cmd := exec.Command(cmdName, args...) + cmd.Dir = cwd + cmd.Stdout = fdStdout + cmd.Env = append(os.Environ(), fmt.Sprintf("%s=%d", RedoLevelEnv, Level+1)) + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", RedoDirPrefixEnv, dirPrefix)) + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", RedoBuildUUIDEnv, BuildUUID)) + childStderrPrefix := tempsuffix() + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", RedoStderrPrefixEnv, childStderrPrefix)) + cmd.ExtraFiles = append(cmd.ExtraFiles, fdDep) + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%d", RedoDepFdEnv, 3+0)) + if JSR == nil { + // infinite jobs + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=NO", RedoJSRFdEnv)) + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=NO", RedoJSWFdEnv)) + } else { + cmd.ExtraFiles = append(cmd.ExtraFiles, JSR) + cmd.ExtraFiles = append(cmd.ExtraFiles, JSW) + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%d", RedoJSRFdEnv, 3+1)) + cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%d", RedoJSWFdEnv, 3+2)) + } + + // Preparing stderr + stderr, err := cmd.StderrPipe() + if err != nil { + panic(err) + } + var fdStderr *os.File + if StderrKeep { + fdStderr, err = os.OpenFile( + path.Join(redoDir, tgt+LogSuffix), + os.O_WRONLY|os.O_CREATE, + os.FileMode(0666), + ) + if err != nil { + cleanup() + return errf(err) + } + fdStderr.Truncate(0) + } + trace(CDebug, "sh: %s: %s %s [%s]", tgtOrig, cmdName, args, cwd) + + Jobs.Add(1) + go func() { + jsAcquire() + started := time.Now() + defer func() { + jsRelease() + lockRelease() + fdDep.Close() + fdStdout.Close() + if fdStderr != nil { + fdStderr.Close() + } + os.Remove(fdDep.Name()) + os.Remove(fdStdout.Name()) + os.Remove(tmpPath) + os.Remove(fdLock.Name()) + finished := time.Now() + trace(CDone, "%s (%fsec)", tgtOrig, finished.Sub(started).Seconds()) + Jobs.Done() + }() + err := cmd.Start() + if err != nil { + errs <- errf(err) + return + } + pid := fmt.Sprintf("[%d]", cmd.Process.Pid) + trace(CDebug, "%s runs %s", tgtOrig, pid) + + stderrTerm := make(chan struct{}, 0) + go func() { + scanner := bufio.NewScanner(stderr) + var line string + ts := new(TAI64N) + for scanner.Scan() { + line = scanner.Text() + if strings.HasPrefix(line, childStderrPrefix) { + line = line[len(childStderrPrefix):] + os.Stderr.WriteString(StderrPrefix + line + "\n") + continue + } + if fdStderr != nil { + tai64nNow(ts) + fmt.Fprintf(fdStderr, "@%s %s\n", hex.EncodeToString(ts[:]), line) + } + if StderrSilent { + continue + } + if MyPid == 0 { + trace(CNone, "%s", line) + } else { + trace(CNone, "%s %s", pid, line) + } + } + close(stderrTerm) + }() + + // Wait for job completion + <-stderrTerm + err = cmd.Wait() + if err != nil { + errs <- errf(err) + return + } + + // Does it produce both stdout and tmp? + fiStdout, err := os.Stat(fdStdout.Name()) + if err != nil { + errs <- errf(err) + return + } + tmpExists := false + _, err = os.Stat(tmpPath) + if err == nil { + if fiStdout.Size() > 0 { + errs <- errf(fmt.Errorf("%s created both tmp and stdout", tgtOrig)) + return + } + tmpExists = true + } else if !os.IsNotExist(err) { + errs <- errf(err) + return + } + + // Determine what file we must process at last + var fd *os.File + if tmpExists { + fd, err = os.Open(tmpPath) + if err != nil { + errs <- errf(err) + return + } + defer fd.Close() + } else if fiStdout.Size() > 0 { + fd = fdStdout + } + + // Do we need to ifcreate it, of ifchange with renaming? + if fd == nil { + if err = ifcreate(fdDep, tgt); err != nil { + errs <- errf(err) + return + } + } else { + if !NoSync { + if err = fd.Sync(); err != nil { + errs <- errf(err) + return + } + } + if err = os.Rename(fd.Name(), path.Join(cwdOrig, tgt)); err != nil { + errs <- errf(err) + return + } + if !NoSync { + fdDir, err := os.Open(cwdOrig) + if err != nil { + errs <- errf(err) + return + } + defer fdDir.Close() + if err = fdDir.Sync(); err != nil { + errs <- errf(err) + return + } + } + if err = writeDep(fdDep, cwdOrig, tgt); err != nil { + errs <- errf(err) + return + } + } + + // Commit dep. + if !NoSync { + if err = fdDep.Sync(); err != nil { + errs <- errf(err) + return + } + } + if err = os.Rename(fdDep.Name(), path.Join(redoDir, tgt+DepSuffix)); err != nil { + errs <- errf(err) + return + } + if !NoSync { + fdDir, err := os.Open(redoDir) + if err != nil { + errs <- errf(err) + return + } + defer fdDir.Close() + if err = fdDir.Sync(); err != nil { + errs <- errf(err) + return + } + } + errs <- nil + }() + return nil +} diff --git a/tai64n.go b/tai64n.go new file mode 100644 index 0000000..f2b4791 --- /dev/null +++ b/tai64n.go @@ -0,0 +1,14 @@ +package main + +import ( + "encoding/binary" + "time" +) + +type TAI64N [12]byte + +func tai64nNow(ts *TAI64N) { + t := time.Now() + binary.BigEndian.PutUint64(ts[:], uint64(0x400000000000000a)+uint64(t.Unix())) + binary.BigEndian.PutUint32(ts[8:], uint32(t.Nanosecond())) +} diff --git a/usage.go b/usage.go new file mode 100644 index 0000000..704873c --- /dev/null +++ b/usage.go @@ -0,0 +1,75 @@ +package main + +import ( + "flag" + "fmt" + "os" + "runtime" + "strings" +) + +const ( + Version = "0.1.0" + Warranty = `This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, version 3 of the License. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see .` +) + +func versionGet() string { + return strings.Join([]string{ + "goredo", Version, "built with", runtime.Version(), + }, " ") +} + +func usage() { + fmt.Fprintf(os.Stderr, versionGet()+` +Copyright (C) 2020 Sergey Matveev +License GPLv3: GNU GPL version 3 +This is free software: you are free to change and redistribute it. +There is NO WARRANTY, to the extent permitted by law. + +redo, redo-{always,cleanup,ifchange,ifcreate,log,stamp,whichdo} must be +linked to goredo executable. It determines the command by its own name. +You can create them by running: goredo -symlinks. + +* redo [options] [target ...] + forcefully and sequentially build specified targets +* redo-always + always build current target. Unusable outside .do +* redo-cleanup {full,log,tmp} [...] + remove either all goredo's related temporary files, or kept stderr + logs, or everything (including .redo directories) related +* redo-ifchange target [...] + build specified targets in parallel, if they are changed. Record them + as dependencies for current target +* redo-ifcreate target [...] + record ifcreate dependency for current target. Unusable outside .do +* redo-log target [ | tai64nlocal ] + display kept target's stderr with TAI64N timestamped lines. Only the + last build is kept. You must enable stderr keeping with either + -stderr-keep, or REDO_STDERR_KEEP=1 +* redo-stamp < [$3] + record stamp dependency for current target. Unusable outside .do +* redo-whichdo target + display .do search paths for specified target. Exits successfully + if the last .do in output if the found existing one + +Options: +`) + flag.PrintDefaults() + fmt.Fprintln(os.Stderr, ` +Additional environment variables: + NO_COLOR -- disable messages colouring + REDO_NO_HASH -- disable dependencies (except redo-stamp-ed) hashing + REDO_NO_SYNC -- disable files/directories explicit filesystem syncing + REDO_TOP_DIR -- do not search for .do above that directory + (it can contain .redo/top as an alternative)`) +}