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{
94 fmt.Println(os.Args[0], "<-", cmdName)
95 if err := os.Symlink(os.Args[0], cmdName); err != nil {
105 Cwd, err = os.Getwd()
110 NoColor = os.Getenv(EnvNoColor) != ""
111 NoSync = os.Getenv(EnvNoSync) == "1"
112 InodeTrust = os.Getenv(EnvInodeNoTrust) == ""
114 TopDir = os.Getenv(EnvTopDir)
118 TopDir, err = filepath.Abs(TopDir)
123 DirPrefix = os.Getenv(EnvDirPrefix)
126 mustSetenv(EnvStderrKeep, "1")
128 if *flagStderrSilent {
129 mustSetenv(EnvStderrSilent, "1")
132 mustSetenv(EnvNoProgress, "1")
135 mustSetenv(EnvDebug, "1")
138 mustSetenv(EnvLogWait, "1")
141 mustSetenv(EnvLogLock, "1")
144 mustSetenv(EnvLogPid, "1")
147 mustSetenv(EnvLogJS, "1")
149 StderrKeep = os.Getenv(EnvStderrKeep) == "1"
150 StderrSilent = os.Getenv(EnvStderrSilent) == "1"
151 NoProgress = os.Getenv(EnvNoProgress) == "1"
152 Debug = os.Getenv(EnvDebug) == "1"
153 LogWait = os.Getenv(EnvLogWait) == "1"
154 LogLock = os.Getenv(EnvLogLock) == "1"
155 LogJS = os.Getenv(EnvLogJS) == "1"
156 if Debug || os.Getenv(EnvLogPid) == "1" {
161 mustSetenv(EnvTrace, "1")
163 if os.Getenv(EnvTrace) == "1" {
170 // Those are internal envs
171 FdOODTgts, err = ioutil.TempFile("", "ood-tgts")
175 if err = os.Remove(FdOODTgts.Name()); err != nil {
178 FdOODTgtsLock, err = ioutil.TempFile("", "ood-tgts.lock")
182 if err = os.Remove(FdOODTgtsLock.Name()); err != nil {
186 if v := os.Getenv(EnvOODTgtsFd); v != "" {
187 fd := mustParseFd(v, EnvOODTgtsFd)
188 fdLock := mustParseFd(v, EnvOODTgtsLockFd)
189 if err = unix.Flock(int(fdLock.Fd()), unix.LOCK_EX); err != nil {
192 if _, err = fd.Seek(0, io.SeekStart); err != nil {
195 tgtsRaw, err := ioutil.ReadAll(bufio.NewReader(fd))
199 unix.Flock(int(fdLock.Fd()), unix.LOCK_UN)
200 OODTgts = make(map[string]struct{})
201 for _, tgtRaw := range bytes.Split(tgtsRaw, []byte{0}) {
206 OODTgts[t] = struct{}{}
207 trace(CDebug, "ood: known to be: %s", t)
211 StderrPrefix = os.Getenv(EnvStderrPrefix)
212 if v := os.Getenv(EnvLevel); v != "" {
213 Level, err = strconv.Atoi(v)
218 panic("negative " + EnvLevel)
223 if v := os.Getenv(EnvDepFd); v != "" {
224 fdDep = mustParseFd(v, EnvDepFd)
228 BuildUUID = os.Getenv(EnvBuildUUID)
231 if _, err = io.ReadFull(rand.Reader, raw[:]); err != nil {
234 raw[6] = (raw[6] & 0x0F) | uint8(4<<4) // version 4
235 BuildUUID = fmt.Sprintf(
237 raw[0:4], raw[4:6], raw[6:8], raw[8:10], raw[10:],
240 tgts = []string{"all"}
246 for i, tgt := range tgts {
248 tgts[i] = cwdMustRel(tgt)
254 cmdName := path.Base(os.Args[0])
256 CDebug, "[%s] run: %s %s cwd:%s dirprefix:%s",
257 BuildUUID, cmdName, tgts, Cwd, DirPrefix,
263 for _, tgt := range tgts {
264 ok, err = ifchange([]string{tgt}, true, traced)
265 if err != nil || !ok {
269 case "redo-ifchange":
270 ok, err = ifchange(tgts, false, traced)
272 err = writeDeps(fdDep, tgts)
274 case "redo-ifcreate":
276 log.Fatalln("no", EnvDepFd)
278 for _, tgt := range tgts {
279 err = ifcreate(fdDep, tgt)
286 log.Fatalln("no", EnvDepFd)
290 for _, what := range tgts {
291 err = cleanupWalker(Cwd, what)
300 log.Fatalln("no", EnvDepFd)
302 err = stamp(fdDep, os.Stdin)
305 log.Fatalln("single target expected")
307 d, t := cwdAndTgt(tgts[0])
309 fd, err = os.Open(path.Join(d, RedoDir, t+LogSuffix))
313 _, err = io.Copy(os.Stdout, fd)
316 log.Fatalln("single target expected")
319 fdTmp, err = ioutil.TempFile("", "whichdo")
323 if err = os.Remove(fdTmp.Name()); err != nil {
326 cwd, tgt := cwdAndTgt(tgts[0])
327 doFile, upLevels, err := findDo(fdTmp, cwd, tgt)
331 _, err = fdTmp.Seek(0, io.SeekStart)
335 r := recfile.NewReader(fdTmp)
337 m, err := r.NextMap()
344 fmt.Println(cwdMustRel(cwd, m["Target"]))
349 p := make([]string, 0, upLevels+2)
351 for i := 0; i < upLevels; i++ {
354 p = append(p, doFile)
355 rel, err := filepath.Rel(Cwd, path.Join(p...))
362 tgts, err = targetsWalker(Cwd)
364 for _, tgt := range tgts {
368 tgts, err = targetsWalker(Cwd)
371 for _, tgt := range tgts {
372 ood, err = isOOD(Cwd, tgt, 0, nil)
381 tgts, err = sourcesWalker()
383 for _, tgt := range tgts {
387 log.Fatalln("unknown command", cmdName)
393 if !ok || err != nil {
396 trace(CDebug, "[%s] finished: %s %s", BuildUUID, cmdName, tgts)