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/>.
35 "go.cypherpunks.ru/recfile"
36 "golang.org/x/sys/unix"
44 func mustSetenv(key, value string) {
45 if err := os.Setenv(key, value); err != nil {
50 func mustParseFd(v, name string) *os.File {
51 ptr, err := strconv.ParseUint(v, 10, 64)
55 fd := os.NewFile(uintptr(ptr), name)
57 panic("can not parse fd: " + name)
63 version := flag.Bool("version", false, "print version")
64 warranty := flag.Bool("warranty", false, "print warranty information")
65 symlinks := flag.Bool("symlinks", false, "create necessary symlinks in current directory")
67 flag.Usage = func() { usage(os.Args[0]) }
74 fmt.Println("goredo", Version, "built with", runtime.Version())
79 for _, cmdName := range []string{
90 fmt.Println(os.Args[0], "<-", cmdName)
91 if err := os.Symlink(os.Args[0], cmdName); err != nil {
101 Cwd, err = os.Getwd()
106 NoColor = os.Getenv(EnvNoColor) != ""
107 NoSync = os.Getenv(EnvNoSync) == "1"
108 InodeTrust = os.Getenv(EnvInodeNoTrust) == ""
110 TopDir = os.Getenv(EnvTopDir)
114 TopDir, err = filepath.Abs(TopDir)
119 DirPrefix = os.Getenv(EnvDirPrefix)
122 mustSetenv(EnvStderrKeep, "1")
124 if *flagStderrSilent {
125 mustSetenv(EnvStderrSilent, "1")
128 mustSetenv(EnvNoProgress, "1")
131 mustSetenv(EnvDebug, "1")
134 mustSetenv(EnvLogWait, "1")
137 mustSetenv(EnvLogLock, "1")
140 mustSetenv(EnvLogPid, "1")
143 mustSetenv(EnvLogJS, "1")
145 StderrKeep = os.Getenv(EnvStderrKeep) == "1"
146 StderrSilent = os.Getenv(EnvStderrSilent) == "1"
147 NoProgress = os.Getenv(EnvNoProgress) == "1"
148 Debug = os.Getenv(EnvDebug) == "1"
149 LogWait = os.Getenv(EnvLogWait) == "1"
150 LogLock = os.Getenv(EnvLogLock) == "1"
151 LogJS = os.Getenv(EnvLogJS) == "1"
152 if Debug || os.Getenv(EnvLogPid) == "1" {
157 mustSetenv(EnvTrace, "1")
162 traced = os.Getenv(EnvTrace) == "1"
165 // Those are internal envs
166 FdOODTgts, err = ioutil.TempFile("", "ood-tgts")
170 if err = os.Remove(FdOODTgts.Name()); err != nil {
173 FdOODTgtsLock, err = ioutil.TempFile("", "ood-tgts.lock")
177 if err = os.Remove(FdOODTgtsLock.Name()); err != nil {
181 if v := os.Getenv(EnvOODTgtsFd); v != "" {
182 fd := mustParseFd(v, EnvOODTgtsFd)
183 fdLock := mustParseFd(v, EnvOODTgtsLockFd)
184 if err = unix.Flock(int(fdLock.Fd()), unix.LOCK_EX); err != nil {
187 if _, err = fd.Seek(0, os.SEEK_SET); err != nil {
190 tgtsRaw, err := ioutil.ReadAll(bufio.NewReader(fd))
194 unix.Flock(int(fdLock.Fd()), unix.LOCK_UN)
195 OODTgts = make(map[string]struct{})
196 for _, tgtRaw := range bytes.Split(tgtsRaw, []byte{0}) {
201 OODTgts[t] = struct{}{}
202 trace(CDebug, "ood: known to be: %s", t)
206 StderrPrefix = os.Getenv(EnvStderrPrefix)
207 if v := os.Getenv(EnvLevel); v != "" {
208 Level, err = strconv.Atoi(v)
213 panic("negative " + EnvLevel)
218 if v := os.Getenv(EnvDepFd); v != "" {
219 fdDep = mustParseFd(v, EnvDepFd)
223 BuildUUID = os.Getenv(EnvBuildUUID)
226 if _, err = io.ReadFull(rand.Reader, raw[:]); err != nil {
229 raw[6] = (raw[6] & 0x0F) | uint8(4<<4) // version 4
230 BuildUUID = fmt.Sprintf(
232 raw[0:4], raw[4:6], raw[6:8], raw[8:10], raw[10:],
235 tgts = []string{"all"}
241 for i, tgt := range tgts {
243 tgts[i] = cwdMustRel(tgt)
249 cmdName := path.Base(os.Args[0])
251 CDebug, "[%s] run: %s %s cwd:%s dirprefix:%s",
252 BuildUUID, cmdName, tgts, Cwd, DirPrefix,
258 for _, tgt := range tgts {
259 ok, err = ifchange([]string{tgt}, true, traced)
260 if err != nil || !ok {
264 case "redo-ifchange":
265 ok, err = ifchange(tgts, false, traced)
267 err = writeDeps(fdDep, tgts)
269 case "redo-ifcreate":
271 log.Fatalln("no", EnvDepFd)
273 for _, tgt := range tgts {
274 err = ifcreate(fdDep, tgt)
281 log.Fatalln("no", EnvDepFd)
285 for _, what := range tgts {
286 err = cleanupWalker(Cwd, what)
295 log.Fatalln("no", EnvDepFd)
297 err = stamp(fdDep, os.Stdin)
300 log.Fatalln("single target expected")
302 d, t := cwdAndTgt(tgts[0])
304 fd, err = os.Open(path.Join(d, RedoDir, t+LogSuffix))
308 _, err = io.Copy(os.Stdout, fd)
311 log.Fatalln("single target expected")
314 fdTmp, err = ioutil.TempFile("", "whichdo")
318 if err = os.Remove(fdTmp.Name()); err != nil {
321 cwd, tgt := cwdAndTgt(tgts[0])
322 doFile, upLevels, err := findDo(fdTmp, cwd, tgt)
326 _, err = fdTmp.Seek(0, os.SEEK_SET)
330 r := recfile.NewReader(fdTmp)
332 m, err := r.NextMap()
339 fmt.Println(cwdMustRel(cwd, m["Target"]))
344 p := make([]string, 0, upLevels+2)
346 for i := 0; i < upLevels; i++ {
349 p = append(p, doFile)
350 rel, err := filepath.Rel(Cwd, path.Join(p...))
357 log.Fatalln("unknown command", cmdName)
363 if !ok || err != nil {
366 trace(CDebug, "[%s] finished: %s %s", BuildUUID, cmdName, tgts)