--- /dev/null
+/redo
+/redo-always
+/redo-cleanup
+/redo-ifchange
+/redo-ifcreate
+/redo-log
+/redo-stamp
+/redo-whichdo
--- /dev/null
+ GNU GENERAL PUBLIC LICENSE
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+ 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.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ 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 <http://www.gnu.org/licenses/>.
+
+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:
+
+ <program> Copyright (C) <year> <name of author>
+ 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
+<http://www.gnu.org/licenses/>.
+
+ 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
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
--- /dev/null
+*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
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+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()
+}
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+// 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
+}
--- /dev/null
+%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}/
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+// .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
+}
--- /dev/null
+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
+)
--- /dev/null
+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=
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+// 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")
+ }
+}
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+// 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
+}
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+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)
+ }
+}
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+// 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
+}
--- /dev/null
+/*
+goredo -- redo implementation on pure Go
+Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+
+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 <http://www.gnu.org/licenses/>.
+*/
+
+// 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
+}
--- /dev/null
+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()))
+}
--- /dev/null
+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 <http://www.gnu.org/licenses/>.`
+)
+
+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 <http://gnu.org/licenses/gpl.html>
+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)`)
+}