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/>.
36 "go.cypherpunks.ru/recfile"
37 "golang.org/x/sys/unix"
45 func mustSetenv(key, value string) {
46 if err := os.Setenv(key, value); err != nil {
51 func mustParseFd(v, name string) *os.File {
52 ptr, err := strconv.ParseUint(v, 10, 64)
56 fd := os.NewFile(uintptr(ptr), name)
58 panic("can not parse fd: " + name)
64 version := flag.Bool("version", false, "print version")
65 warranty := flag.Bool("warranty", false, "print warranty information")
66 symlinks := flag.Bool("symlinks", false, "create necessary symlinks in current directory")
68 flag.Usage = func() { usage(os.Args[0]) }
75 fmt.Println("goredo", Version, "built with", runtime.Version())
80 for _, cmdName := range []string{
95 fmt.Println(os.Args[0], "<-", cmdName)
96 if err := os.Symlink(os.Args[0], cmdName); err != nil {
106 Cwd, err = os.Getwd()
111 NoColor = os.Getenv(EnvNoColor) != ""
112 NoSync = os.Getenv(EnvNoSync) == "1"
113 InodeTrust = os.Getenv(EnvInodeNoTrust) == ""
115 TopDir = os.Getenv(EnvTopDir)
119 TopDir, err = filepath.Abs(TopDir)
124 DirPrefix = os.Getenv(EnvDirPrefix)
127 mustSetenv(EnvStderrKeep, "1")
129 if *flagStderrSilent {
130 mustSetenv(EnvStderrSilent, "1")
133 mustSetenv(EnvNoProgress, "1")
136 mustSetenv(EnvDebug, "1")
139 mustSetenv(EnvLogWait, "1")
142 mustSetenv(EnvLogLock, "1")
145 mustSetenv(EnvLogPid, "1")
148 mustSetenv(EnvLogJS, "1")
150 StderrKeep = os.Getenv(EnvStderrKeep) == "1"
151 StderrSilent = os.Getenv(EnvStderrSilent) == "1"
152 NoProgress = os.Getenv(EnvNoProgress) == "1"
153 Debug = os.Getenv(EnvDebug) == "1"
154 LogWait = os.Getenv(EnvLogWait) == "1"
155 LogLock = os.Getenv(EnvLogLock) == "1"
156 LogJS = os.Getenv(EnvLogJS) == "1"
157 if Debug || os.Getenv(EnvLogPid) == "1" {
162 mustSetenv(EnvTrace, "1")
164 if os.Getenv(EnvTrace) == "1" {
171 // Those are internal envs
172 FdOODTgts, err = ioutil.TempFile("", "ood-tgts")
176 if err = os.Remove(FdOODTgts.Name()); err != nil {
179 FdOODTgtsLock, err = ioutil.TempFile("", "ood-tgts.lock")
183 if err = os.Remove(FdOODTgtsLock.Name()); err != nil {
187 if v := os.Getenv(EnvOODTgtsFd); v != "" {
188 fd := mustParseFd(v, EnvOODTgtsFd)
189 fdLock := mustParseFd(v, EnvOODTgtsLockFd)
190 if err = unix.Flock(int(fdLock.Fd()), unix.LOCK_EX); err != nil {
193 if _, err = fd.Seek(0, io.SeekStart); err != nil {
196 tgtsRaw, err := ioutil.ReadAll(bufio.NewReader(fd))
200 unix.Flock(int(fdLock.Fd()), unix.LOCK_UN)
201 OODTgts = map[string]struct{}{}
202 for _, tgtRaw := range bytes.Split(tgtsRaw, []byte{0}) {
207 OODTgts[t] = struct{}{}
208 trace(CDebug, "ood: known to be: %s", t)
212 StderrPrefix = os.Getenv(EnvStderrPrefix)
213 if v := os.Getenv(EnvLevel); v != "" {
214 Level, err = strconv.Atoi(v)
219 panic("negative " + EnvLevel)
224 if v := os.Getenv(EnvDepFd); v != "" {
225 fdDep = mustParseFd(v, EnvDepFd)
229 BuildUUID = os.Getenv(EnvBuildUUID)
230 tgtsWasEmpty := len(tgts) == 0
233 if _, err = io.ReadFull(rand.Reader, raw[:]); err != nil {
236 raw[6] = (raw[6] & 0x0F) | uint8(4<<4) // version 4
237 BuildUUID = fmt.Sprintf(
239 raw[0:4], raw[4:6], raw[6:8], raw[8:10], raw[10:],
242 tgts = []string{"all"}
248 for i, tgt := range tgts {
250 tgts[i] = cwdMustRel(tgt)
256 cmdName := path.Base(os.Args[0])
258 CDebug, "[%s] run: %s %s cwd:%s dirprefix:%s",
259 BuildUUID, cmdName, tgts, Cwd, DirPrefix,
265 for _, tgt := range tgts {
266 ok, err = ifchange([]string{tgt}, true, traced)
267 if err != nil || !ok {
271 case "redo-ifchange":
272 ok, err = ifchange(tgts, false, traced)
274 err = writeDeps(fdDep, tgts)
276 case "redo-ifcreate":
278 log.Fatalln("no", EnvDepFd)
280 for _, tgt := range tgts {
281 err = ifcreate(fdDep, tgt)
288 log.Fatalln("no", EnvDepFd)
292 for _, what := range tgts {
293 err = cleanupWalker(Cwd, what)
302 log.Fatalln("no", EnvDepFd)
304 err = stamp(fdDep, os.Stdin)
307 log.Fatalln("single target expected")
309 d, t := cwdAndTgt(tgts[0])
311 fd, err = os.Open(path.Join(d, RedoDir, t+LogSuffix))
315 _, err = io.Copy(os.Stdout, fd)
318 log.Fatalln("single target expected")
321 fdTmp, err = ioutil.TempFile("", "whichdo")
325 if err = os.Remove(fdTmp.Name()); err != nil {
328 cwd, tgt := cwdAndTgt(tgts[0])
329 doFile, upLevels, err := findDo(fdTmp, cwd, tgt)
333 _, err = fdTmp.Seek(0, io.SeekStart)
337 r := recfile.NewReader(fdTmp)
339 m, err := r.NextMap()
346 fmt.Println(cwdMustRel(cwd, m["Target"]))
351 p := make([]string, 0, upLevels+2)
353 for i := 0; i < upLevels; i++ {
356 p = append(p, doFile)
357 rel, err := filepath.Rel(Cwd, path.Join(p...))
367 tgts, err = targetsWalker(tgts)
372 for _, tgt := range tgts {
377 log.Fatalln("no targets specified")
379 var tgtsKnown []string
380 tgtsKnown, err = targetsWalker([]string{Cwd})
384 deps := map[string]map[string]struct{}{}
385 for _, tgt := range tgtsKnown {
386 collectDeps(Cwd, tgt, 0, deps, true)
388 seen := map[string]struct{}{}
389 for _, tgt := range tgts {
390 collectWholeDeps(deps[tgt], deps, seen)
392 tgts := make([]string, 0, len(seen))
393 for dep := range seen {
394 tgts = append(tgts, dep)
397 for _, dep := range tgts {
402 tgts, err = targetsWalker([]string{Cwd})
409 for _, tgt := range tgts {
410 ood, err = isOOD(Cwd, tgt, 0, nil)
420 tgts, err = targetsWalker([]string{Cwd})
427 srcs, err = sourcesWalker(tgts)
429 for _, src := range srcs {
433 log.Fatalln("unknown command", cmdName)
439 if !ok || err != nil {
442 trace(CDebug, "[%s] finished: %s %s", BuildUUID, cmdName, tgts)