2 goredo -- djb's redo implementation on pure Go
3 Copyright (C) 2020-2021 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, version 3 of the License.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
34 "go.cypherpunks.ru/recfile"
35 "golang.org/x/sys/unix"
43 func mustSetenv(key, value string) {
44 if err := os.Setenv(key, value); err != nil {
49 func mustParseFd(v, name string) *os.File {
50 ptr, err := strconv.ParseUint(v, 10, 64)
54 fd := os.NewFile(uintptr(ptr), name)
56 panic("can not parse fd: " + name)
62 version := flag.Bool("version", false, "print version")
63 warranty := flag.Bool("warranty", false, "print warranty information")
64 symlinks := flag.Bool("symlinks", false, "create necessary symlinks in current directory")
73 fmt.Println(versionGet())
78 for _, cmdName := range []string{
89 fmt.Println(os.Args[0], "<-", cmdName)
90 if err := os.Symlink(os.Args[0], cmdName); err != nil {
100 Cwd, err = os.Getwd()
105 NoColor = os.Getenv(EnvNoColor) != ""
106 NoSync = os.Getenv(EnvNoSync) == "1"
107 InodeTrust = os.Getenv(EnvInodeNoTrust) == ""
109 TopDir = os.Getenv(EnvTopDir)
113 TopDir, err = filepath.Abs(TopDir)
118 DirPrefix = os.Getenv(EnvDirPrefix)
121 mustSetenv(EnvStderrKeep, "1")
123 if *flagStderrSilent {
124 mustSetenv(EnvStderrSilent, "1")
127 mustSetenv(EnvNoProgress, "1")
130 mustSetenv(EnvDebug, "1")
133 mustSetenv(EnvLogWait, "1")
136 mustSetenv(EnvLogLock, "1")
139 mustSetenv(EnvLogPid, "1")
142 mustSetenv(EnvLogJS, "1")
144 StderrKeep = os.Getenv(EnvStderrKeep) == "1"
145 StderrSilent = os.Getenv(EnvStderrSilent) == "1"
146 NoProgress = os.Getenv(EnvNoProgress) == "1"
147 Debug = os.Getenv(EnvDebug) == "1"
148 LogWait = os.Getenv(EnvLogWait) == "1"
149 LogLock = os.Getenv(EnvLogLock) == "1"
150 LogJS = os.Getenv(EnvLogJS) == "1"
151 if Debug || os.Getenv(EnvLogPid) == "1" {
156 mustSetenv(EnvTrace, "1")
161 traced = os.Getenv(EnvTrace) == "1"
164 // Those are internal envs
165 FdOODTgts, err = ioutil.TempFile("", "ood-tgts")
169 if err = os.Remove(FdOODTgts.Name()); err != nil {
172 FdOODTgtsLock, err = ioutil.TempFile("", "ood-tgts.lock")
176 if err = os.Remove(FdOODTgtsLock.Name()); err != nil {
180 if v := os.Getenv(EnvOODTgtsFd); v != "" {
181 fd := mustParseFd(v, EnvOODTgtsFd)
182 fdLock := mustParseFd(v, EnvOODTgtsLockFd)
183 if err = unix.Flock(int(fdLock.Fd()), unix.LOCK_EX); err != nil {
186 if _, err = fd.Seek(0, os.SEEK_SET); err != nil {
189 tgtsRaw, err := ioutil.ReadAll(bufio.NewReader(fd))
193 unix.Flock(int(fdLock.Fd()), unix.LOCK_UN)
194 OODTgts = make(map[string]struct{})
195 for _, tgtRaw := range bytes.Split(tgtsRaw, []byte{0}) {
200 OODTgts[t] = struct{}{}
201 trace(CDebug, "ood: known to be: %s", t)
205 StderrPrefix = os.Getenv(EnvStderrPrefix)
206 if v := os.Getenv(EnvLevel); v != "" {
207 Level, err = strconv.Atoi(v)
212 panic("negative " + EnvLevel)
217 if v := os.Getenv(EnvDepFd); v != "" {
218 fdDep = mustParseFd(v, EnvDepFd)
222 BuildUUID = os.Getenv(EnvBuildUUID)
225 if _, err = io.ReadFull(rand.Reader, raw[:]); err != nil {
228 raw[6] = (raw[6] & 0x0F) | uint8(4<<4) // version 4
229 BuildUUID = fmt.Sprintf(
231 raw[0:4], raw[4:6], raw[6:8], raw[8:10], raw[10:],
234 tgts = []string{"all"}
240 for i, tgt := range tgts {
242 tgts[i] = cwdMustRel(tgt)
248 cmdName := path.Base(os.Args[0])
250 CDebug, "[%s] run: %s %s cwd:%s dirprefix:%s",
251 BuildUUID, cmdName, tgts, Cwd, DirPrefix,
257 for _, tgt := range tgts {
258 ok, err = ifchange([]string{tgt}, true, traced)
259 if err != nil || !ok {
263 case "redo-ifchange":
264 ok, err = ifchange(tgts, false, traced)
266 err = writeDeps(fdDep, tgts)
268 case "redo-ifcreate":
270 log.Fatalln("no", EnvDepFd)
272 for _, tgt := range tgts {
273 err = ifcreate(fdDep, tgt)
280 log.Fatalln("no", EnvDepFd)
284 for _, what := range tgts {
285 err = cleanupWalker(Cwd, what)
294 log.Fatalln("no", EnvDepFd)
296 err = stamp(fdDep, os.Stdin)
299 log.Fatalln("single target expected")
301 d, t := cwdAndTgt(tgts[0])
303 fd, err = os.Open(path.Join(d, RedoDir, t+LogSuffix))
307 _, err = io.Copy(os.Stdout, fd)
310 log.Fatalln("single target expected")
313 fdTmp, err = ioutil.TempFile("", "whichdo")
317 if err = os.Remove(fdTmp.Name()); err != nil {
320 cwd, tgt := cwdAndTgt(tgts[0])
321 doFile, upLevels, err := findDo(fdTmp, cwd, tgt)
325 _, err = fdTmp.Seek(0, os.SEEK_SET)
329 r := recfile.NewReader(fdTmp)
331 m, err := r.NextMap()
338 fmt.Println(cwdMustRel(cwd, m["Target"]))
343 p := make([]string, 0, upLevels+2)
345 for i := 0; i < upLevels; i++ {
348 p = append(p, doFile)
349 rel, err := filepath.Rel(Cwd, path.Join(p...))
356 log.Fatalln("unknown command", cmdName)
362 if !ok || err != nil {
365 trace(CDebug, "[%s] finished: %s %s", BuildUUID, cmdName, tgts)