2 goredo -- djb's redo implementation on pure Go
3 Copyright (C) 2020-2022 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/>.
39 "go.cypherpunks.ru/recfile"
40 "golang.org/x/sys/unix"
44 CmdNameGoredo = "goredo"
46 CmdNameRedoAffects = "redo-affects"
47 CmdNameRedoAlways = "redo-always"
48 CmdNameRedoCleanup = "redo-cleanup"
49 CmdNameRedoDot = "redo-dot"
50 CmdNameRedoIfchange = "redo-ifchange"
51 CmdNameRedoIfcreate = "redo-ifcreate"
52 CmdNameRedoLog = "redo-log"
53 CmdNameRedoOOD = "redo-ood"
54 CmdNameRedoSources = "redo-sources"
55 CmdNameRedoStamp = "redo-stamp"
56 CmdNameRedoTargets = "redo-targets"
57 CmdNameRedoWhichdo = "redo-whichdo"
63 IsTopRedo bool // is it the top redo instance
66 func mustSetenv(key string) {
67 if err := os.Setenv(key, "1"); err != nil {
72 func mustParseFd(v, name string) *os.File {
73 ptr, err := strconv.ParseUint(v, 10, 64)
77 fd := os.NewFile(uintptr(ptr), name)
79 panic("can not parse fd: " + name)
84 func CmdName() string {
85 return path.Base(os.Args[0])
89 version := flag.Bool("version", false, "print version")
90 warranty := flag.Bool("warranty", false, "print warranty information")
94 if cmdName == "goredo" {
95 symlinks = flag.Bool("symlinks", false, "create necessary symlinks in current directory")
98 flag.Usage = func() { usage(os.Args[0]) }
101 fmt.Println(Warranty)
105 fmt.Println("goredo", Version, "built with", runtime.Version())
108 if cmdName == CmdNameGoredo && *symlinks {
110 for _, cmdName := range []string{
125 fmt.Println(os.Args[0], "<-", cmdName)
126 if err := os.Symlink(os.Args[0], cmdName); err != nil {
133 log.SetFlags(log.Lshortfile)
136 Cwd, err = os.Getwd()
141 TopDir = os.Getenv(EnvTopDir)
145 TopDir, err = filepath.Abs(TopDir)
150 DirPrefix = os.Getenv(EnvDirPrefix)
151 DepCwd = os.Getenv(EnvDepCwd)
153 if flagStderrKeep != nil && *flagStderrKeep {
154 mustSetenv(EnvStderrKeep)
156 if flagStderrSilent != nil && *flagStderrSilent {
157 mustSetenv(EnvStderrSilent)
159 if flagNoProgress != nil && *flagNoProgress {
160 mustSetenv(EnvNoProgress)
162 if flagDebug != nil && *flagDebug {
165 if flagLogWait != nil && *flagLogWait {
166 mustSetenv(EnvLogWait)
168 if flagLogLock != nil && *flagLogLock {
169 mustSetenv(EnvLogLock)
171 if flagLogPid != nil && *flagLogPid {
172 mustSetenv(EnvLogPid)
174 if flagLogJS != nil && *flagLogJS {
177 StderrKeep = os.Getenv(EnvStderrKeep) == "1"
178 StderrSilent = os.Getenv(EnvStderrSilent) == "1"
179 NoProgress = os.Getenv(EnvNoProgress) == "1"
180 Debug = os.Getenv(EnvDebug) == "1"
181 LogWait = os.Getenv(EnvLogWait) == "1"
182 LogLock = os.Getenv(EnvLogLock) == "1"
183 LogJS = os.Getenv(EnvLogJS) == "1"
184 if Debug || os.Getenv(EnvLogPid) == "1" {
188 if flagTraceAll != nil && *flagTraceAll {
191 if os.Getenv(EnvTrace) == "1" {
194 } else if flagTrace != nil {
197 NoColor = os.Getenv(EnvNoColor) != ""
198 NoSync = os.Getenv(EnvNoSync) == "1"
199 switch s := os.Getenv(EnvInodeTrust); s {
201 InodeTrust = InodeTrustNone
203 InodeTrust = InodeTrustCtime
205 InodeTrust = InodeTrustMtime
207 log.Fatalln("unknown", EnvInodeTrust, "value")
209 tracef(CDebug, "inode-trust: %s", InodeTrust)
211 // Those are internal envs
212 FdOODTgts, err = ioutil.TempFile("", "ood-tgts")
216 if err = os.Remove(FdOODTgts.Name()); err != nil {
219 FdOODTgtsLock, err = ioutil.TempFile("", "ood-tgts.lock")
223 if err = os.Remove(FdOODTgtsLock.Name()); err != nil {
227 if v := os.Getenv(EnvOODTgtsFd); v != "" {
228 fd := mustParseFd(v, EnvOODTgtsFd)
229 fdLock := mustParseFd(v, EnvOODTgtsLockFd)
230 flock := unix.Flock_t{
232 Whence: io.SeekStart,
234 if err = unix.FcntlFlock(fdLock.Fd(), unix.F_SETLKW, &flock); err != nil {
237 if _, err = fd.Seek(0, io.SeekStart); err != nil {
240 tgtsRaw, err := ioutil.ReadAll(bufio.NewReader(fd))
244 flock.Type = unix.F_UNLCK
245 if err = unix.FcntlFlock(fdLock.Fd(), unix.F_SETLK, &flock); err != nil {
248 OODTgts = map[string]struct{}{}
249 for _, tgtRaw := range bytes.Split(tgtsRaw, []byte{0}) {
254 OODTgts[t] = struct{}{}
255 tracef(CDebug, "ood: known to be: %s", t)
259 StderrPrefix = os.Getenv(EnvStderrPrefix)
260 if v := os.Getenv(EnvLevel); v != "" {
261 Level, err = strconv.Atoi(v)
266 panic("negative " + EnvLevel)
271 if v := os.Getenv(EnvDepFd); v != "" {
272 fdDep = mustParseFd(v, EnvDepFd)
276 BuildUUID = os.Getenv(EnvBuildUUID)
277 tgtsWasEmpty := len(tgts) == 0
281 if _, err = io.ReadFull(rand.Reader, raw[:]); err != nil {
284 raw[6] = (raw[6] & 0x0F) | uint8(4<<4) // version 4
285 BuildUUID = fmt.Sprintf(
287 raw[0:4], raw[4:6], raw[6:8], raw[8:10], raw[10:],
290 tgts = []string{"all"}
294 if cmdName == CmdNameRedo || cmdName == CmdNameRedoIfchange {
298 for i, tgt := range tgts {
300 tgts[i] = cwdMustRel(tgt)
304 killed := make(chan os.Signal, 1)
305 signal.Notify(killed, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM)
308 tracef(CDebug, "[%s] killed", BuildUUID)
311 for pid, proc := range RunningProcs {
312 tracef(CDebug, "[%s] killing child %d", BuildUUID, pid)
313 _ = proc.Signal(syscall.SIGTERM)
321 CDebug, "[%s] run: %s %s cwd:%s dirprefix:%s",
322 BuildUUID, cmdName, tgts, Cwd, DirPrefix,
328 for _, tgt := range tgts {
329 ok, err = ifchange([]string{tgt}, true, traced)
330 if err != nil || !ok {
334 case CmdNameRedoIfchange:
335 ok, err = ifchange(tgts, false, traced)
337 err = depsWrite(fdDep, tgts)
339 case CmdNameRedoIfcreate:
341 log.Fatalln("no", EnvDepFd)
343 for _, tgt := range tgts {
344 tgtRel, err := filepath.Rel(
345 path.Join(Cwd, DirPrefix),
351 err = ifcreate(fdDep, tgtRel)
356 case CmdNameRedoAlways:
358 log.Fatalln("no", EnvDepFd)
361 case CmdNameRedoCleanup:
362 for _, what := range tgts {
363 err = cleanupWalker(Cwd, what)
370 case CmdNameRedoStamp:
372 log.Fatalln("no", EnvDepFd)
374 err = stamp(fdDep, os.Stdin)
377 log.Fatalln("single target expected")
379 d, t := cwdAndTgt(tgts[0])
380 err = showBuildLog(d, t, nil, 0)
381 case CmdNameRedoWhichdo:
383 log.Fatalln("single target expected")
386 fdTmp, err = ioutil.TempFile("", "whichdo")
390 if err = os.Remove(fdTmp.Name()); err != nil {
393 cwd, tgt := cwdAndTgt(tgts[0])
394 doFile, upLevels, err := findDo(fdTmp, cwd, tgt)
398 _, err = fdTmp.Seek(0, io.SeekStart)
402 r := recfile.NewReader(fdTmp)
404 m, err := r.NextMap()
406 if errors.Is(err, io.EOF) {
411 fmt.Println(cwdMustRel(cwd, m["Target"]))
416 p := make([]string, 0, upLevels+2)
418 for i := 0; i < upLevels; i++ {
421 p = append(p, doFile)
422 rel, err := filepath.Rel(Cwd, path.Join(p...))
428 case CmdNameRedoTargets:
432 tgts, err = targetsWalker(tgts)
437 for _, tgt := range tgts {
440 case CmdNameRedoAffects:
442 log.Fatalln("no targets specified")
444 var tgtsKnown []string
445 tgtsKnown, err = targetsWalker([]string{Cwd})
449 deps := map[string]map[string]struct{}{}
450 for _, tgt := range tgtsKnown {
451 collectDeps(Cwd, tgt, 0, deps, true)
453 seen := map[string]struct{}{}
454 for _, tgt := range tgts {
455 collectWholeDeps(deps[tgt], deps, seen)
457 tgts := make([]string, 0, len(seen))
458 for dep := range seen {
459 tgts = append(tgts, dep)
462 for _, dep := range tgts {
467 tgts, err = targetsWalker([]string{Cwd})
474 for _, tgt := range tgts {
475 ood, err = isOOD(Cwd, tgt, 0, nil)
483 case CmdNameRedoSources:
485 tgts, err = targetsWalker([]string{Cwd})
492 srcs, err = sourcesWalker(tgts)
494 for _, src := range srcs {
498 log.Fatalln("unknown command", cmdName)
504 if !ok || err != nil {
507 tracef(CDebug, "[%s] finished: %s %s", BuildUUID, cmdName, tgts)