X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=main.go;h=eb67c8069fa2534b645368e1504b8b6963bb7853;hb=refs%2Fheads%2Fmaster;hp=4de78be52fa786830cfbb92862c1c495cd59140a;hpb=314f58ec690c7321535d6718e8d3a0ecb4cac019;p=goredo.git

diff --git a/main.go b/main.go
index 4de78be..eb67c80 100644
--- a/main.go
+++ b/main.go
@@ -1,47 +1,72 @@
-/*
-goredo -- djb's redo implementation on pure Go
-Copyright (C) 2020-2021 Sergey Matveev <stargrave@stargrave.org>
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, version 3 of the License.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+// goredo -- djb's redo implementation on pure Go
+// Copyright (C) 2020-2024 Sergey Matveev <stargrave@stargrave.org>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 3 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package main
 
 import (
 	"bufio"
 	"bytes"
-	"crypto/rand"
+	"encoding/hex"
+	"errors"
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
+	"io/fs"
 	"log"
 	"os"
+	"os/signal"
 	"path"
-	"path/filepath"
+	"runtime"
+	"sort"
 	"strconv"
+	"syscall"
 
+	"github.com/google/uuid"
 	"go.cypherpunks.ru/recfile"
 	"golang.org/x/sys/unix"
 )
 
+const (
+	CmdNameGoredo       = "goredo"
+	CmdNameRedo         = "redo"
+	CmdNameRedoAffects  = "redo-affects"
+	CmdNameRedoAlways   = "redo-always"
+	CmdNameRedoCleanup  = "redo-cleanup"
+	CmdNameRedoDep2Rec  = "redo-dep2rec"
+	CmdNameRedoDepFix   = "redo-depfix"
+	CmdNameRedoDot      = "redo-dot"
+	CmdNameRedoIfchange = "redo-ifchange"
+	CmdNameRedoIfcreate = "redo-ifcreate"
+	CmdNameRedoInode    = "redo-inode"
+	CmdNameRedoLog      = "redo-log"
+	CmdNameRedoOOD      = "redo-ood"
+	CmdNameRedoSources  = "redo-sources"
+	CmdNameRedoStamp    = "redo-stamp"
+	CmdNameRedoTargets  = "redo-targets"
+	CmdNameRedoWhichdo  = "redo-whichdo"
+)
+
 var (
 	Cwd       string
-	BuildUUID string
+	BuildUUID uuid.UUID
+	IsTopRedo bool // is it the top redo instance
+	UmaskCur  int
 )
 
-func mustSetenv(key, value string) {
-	if err := os.Setenv(key, value); err != nil {
+func mustSetenv(key string) {
+	if err := os.Setenv(key, "1"); err != nil {
 		panic(err)
 	}
 }
@@ -58,88 +83,112 @@ func mustParseFd(v, name string) *os.File {
 	return fd
 }
 
+func CmdName() string {
+	return path.Base(os.Args[0])
+}
+
 func main() {
 	version := flag.Bool("version", false, "print version")
 	warranty := flag.Bool("warranty", false, "print warranty information")
-	symlinks := flag.Bool("symlinks", false, "create necessary symlinks in current directory")
 
-	flag.Usage = usage
-	flag.Parse()
+	var symlinks *bool
+	cmdName := CmdName()
+	if cmdName == CmdNameGoredo {
+		symlinks = flag.Bool("symlinks", false, "create necessary symlinks in current directory")
+	}
+
+	flag.Usage = func() { usage(os.Args[0]) }
+
+	BuildUUIDStr := os.Getenv(EnvBuildUUID)
+	IsTopRedo = BuildUUIDStr == ""
+
+	var args []string
+	if IsTopRedo {
+		flag.Parse()
+		args = flag.Args()
+	} else {
+		args = os.Args[1:]
+	}
+
 	if *warranty {
 		fmt.Println(Warranty)
 		return
 	}
 	if *version {
-		fmt.Println(versionGet())
+		fmt.Println("goredo", Version, "built with", runtime.Version())
 		return
 	}
-	if *symlinks {
+	if cmdName == CmdNameGoredo && *symlinks {
 		rc := 0
 		for _, cmdName := range []string{
-			"redo",
-			"redo-always",
-			"redo-cleanup",
-			"redo-dot",
-			"redo-ifchange",
-			"redo-ifcreate",
-			"redo-log",
-			"redo-stamp",
-			"redo-whichdo",
+			CmdNameRedo,
+			CmdNameRedoAffects,
+			CmdNameRedoAlways,
+			CmdNameRedoCleanup,
+			CmdNameRedoDep2Rec,
+			CmdNameRedoDepFix,
+			CmdNameRedoDot,
+			CmdNameRedoIfchange,
+			CmdNameRedoIfcreate,
+			CmdNameRedoInode,
+			CmdNameRedoLog,
+			CmdNameRedoOOD,
+			CmdNameRedoSources,
+			CmdNameRedoStamp,
+			CmdNameRedoTargets,
+			CmdNameRedoWhichdo,
 		} {
 			fmt.Println(os.Args[0], "<-", cmdName)
 			if err := os.Symlink(os.Args[0], cmdName); err != nil {
 				rc = 1
-				log.Println(err)
+				log.Print(err)
 			}
 		}
 		os.Exit(rc)
 	}
-	log.SetFlags(0)
+	log.SetFlags(log.Lshortfile)
+
+	UmaskCur = syscall.Umask(0)
+	syscall.Umask(UmaskCur)
 
 	var err error
 	Cwd, err = os.Getwd()
 	if err != nil {
-		log.Fatalln(err)
+		log.Fatal(err)
 	}
 
-	NoColor = os.Getenv(EnvNoColor) != ""
-	NoSync = os.Getenv(EnvNoSync) == "1"
-	InodeTrust = os.Getenv(EnvInodeNoTrust) == ""
-
 	TopDir = os.Getenv(EnvTopDir)
 	if TopDir == "" {
 		TopDir = "/"
 	} else {
-		TopDir, err = filepath.Abs(TopDir)
-		if err != nil {
-			panic(err)
-		}
+		TopDir = mustAbs(TopDir)
 	}
 	DirPrefix = os.Getenv(EnvDirPrefix)
+	DepCwd = os.Getenv(EnvDepCwd)
 
-	if *flagStderrKeep {
-		mustSetenv(EnvStderrKeep, "1")
+	if flagStderrKeep != nil && *flagStderrKeep {
+		mustSetenv(EnvStderrKeep)
 	}
-	if *flagStderrSilent {
-		mustSetenv(EnvStderrSilent, "1")
+	if flagStderrSilent != nil && *flagStderrSilent {
+		mustSetenv(EnvStderrSilent)
 	}
-	if *flagNoProgress {
-		mustSetenv(EnvNoProgress, "1")
+	if flagNoProgress != nil && *flagNoProgress {
+		mustSetenv(EnvNoProgress)
 	}
-	if *flagDebug {
-		mustSetenv(EnvDebug, "1")
+	if flagDebug != nil && *flagDebug {
+		mustSetenv(EnvDebug)
 	}
-	if *flagLogWait {
-		mustSetenv(EnvLogWait, "1")
+	if flagLogWait != nil && *flagLogWait {
+		mustSetenv(EnvLogWait)
 	}
-	if *flagLogLock {
-		mustSetenv(EnvLogLock, "1")
+	if flagLogLock != nil && *flagLogLock {
+		mustSetenv(EnvLogLock)
 	}
-	if *flagLogPid {
-		mustSetenv(EnvLogPid, "1")
+	if flagLogPid != nil && *flagLogPid {
+		mustSetenv(EnvLogPid)
 	}
-	if *flagLogJS {
-		mustSetenv(EnvLogJS, "1")
+	if flagLogJS != nil && *flagLogJS {
+		mustSetenv(EnvLogJS)
 	}
 	StderrKeep = os.Getenv(EnvStderrKeep) == "1"
 	StderrSilent = os.Getenv(EnvStderrSilent) == "1"
@@ -149,48 +198,71 @@ func main() {
 	LogLock = os.Getenv(EnvLogLock) == "1"
 	LogJS = os.Getenv(EnvLogJS) == "1"
 	if Debug || os.Getenv(EnvLogPid) == "1" {
-		MyPid = os.Getpid()
+		MyPID = os.Getpid()
 	}
 	var traced bool
-	if *flagTraceAll {
-		mustSetenv(EnvTrace, "1")
+	if flagTraceAll != nil && *flagTraceAll {
+		mustSetenv(EnvTrace)
 	}
-	if *flagTrace {
+	if os.Getenv(EnvTrace) == "1" {
+		TracedAll = true
 		traced = true
-	} else {
-		traced = os.Getenv(EnvTrace) == "1"
+	} else if flagTrace != nil {
+		traced = *flagTrace
+	}
+	NoColor = os.Getenv(EnvNoColor) != ""
+	NoSync = os.Getenv(EnvNoSync) == "1"
+	StopIfMod = os.Getenv(EnvStopIfMod) == "1"
+	switch s := os.Getenv(EnvInodeTrust); s {
+	case "none":
+		InodeTrust = InodeTrustNone
+	case "", "ctime":
+		InodeTrust = InodeTrustCtime
+	case "mtime":
+		InodeTrust = InodeTrustMtime
+	default:
+		log.Fatalln("unknown", EnvInodeTrust, "value")
 	}
 
 	// Those are internal envs
-	FdOODTgts, err = ioutil.TempFile("", "ood-tgts")
+	FdOODTgts, err = os.CreateTemp("", "ood-tgts")
 	if err != nil {
-		panic(err)
+		log.Fatal(err)
 	}
 	if err = os.Remove(FdOODTgts.Name()); err != nil {
-		panic(err)
+		log.Fatal(err)
 	}
-	FdOODTgtsLock, err = ioutil.TempFile("", "ood-tgts.lock")
+	FdOODTgtsLock, err = os.CreateTemp("", "ood-tgts.lock")
 	if err != nil {
-		panic(err)
+		log.Fatal(err)
 	}
 	if err = os.Remove(FdOODTgtsLock.Name()); err != nil {
-		panic(err)
+		log.Fatal(err)
 	}
 
+	var fdLock *os.File
 	if v := os.Getenv(EnvOODTgtsFd); v != "" {
 		fd := mustParseFd(v, EnvOODTgtsFd)
-		fdLock := mustParseFd(v, EnvOODTgtsLockFd)
-		if err = unix.Flock(int(fdLock.Fd()), unix.LOCK_EX); err != nil {
-			panic(err)
+		fdLock = mustParseFd(v, EnvOODTgtsLockFd)
+		defer fdLock.Close()
+		flock := unix.Flock_t{
+			Type:   unix.F_WRLCK,
+			Whence: io.SeekStart,
 		}
-		if _, err = fd.Seek(0, os.SEEK_SET); err != nil {
-			panic(err)
+		if err = unix.FcntlFlock(fdLock.Fd(), unix.F_SETLKW, &flock); err != nil {
+			log.Fatal(err)
+		}
+		if _, err = fd.Seek(0, io.SeekStart); err != nil {
+			log.Fatal(err)
 		}
-		tgtsRaw, err := ioutil.ReadAll(bufio.NewReader(fd))
+		tgtsRaw, err := io.ReadAll(bufio.NewReader(fd))
 		if err != nil {
-			panic(err)
+			log.Fatal(err)
+		}
+		flock.Type = unix.F_UNLCK
+		if err = unix.FcntlFlock(fdLock.Fd(), unix.F_SETLK, &flock); err != nil {
+			log.Fatal(err)
 		}
-		unix.Flock(int(fdLock.Fd()), unix.LOCK_UN)
 		OODTgts = make(map[string]struct{})
 		for _, tgtRaw := range bytes.Split(tgtsRaw, []byte{0}) {
 			t := string(tgtRaw)
@@ -198,7 +270,7 @@ func main() {
 				continue
 			}
 			OODTgts[t] = struct{}{}
-			trace(CDebug, "ood: known to be: %s", t)
+			tracef(CDebug, "ood: known to be: %s", t)
 		}
 	}
 
@@ -218,150 +290,314 @@ func main() {
 		fdDep = mustParseFd(v, EnvDepFd)
 	}
 
-	tgts := flag.Args()
-	BuildUUID = os.Getenv(EnvBuildUUID)
-	if BuildUUID == "" {
-		raw := new([16]byte)
-		if _, err = io.ReadFull(rand.Reader, raw[:]); err != nil {
-			log.Fatalln(err)
-		}
-		raw[6] = (raw[6] & 0x0F) | uint8(4<<4) // version 4
-		BuildUUID = fmt.Sprintf(
-			"%x-%x-%x-%x-%x",
-			raw[0:4], raw[4:6], raw[6:8], raw[8:10], raw[10:],
-		)
-		if len(tgts) == 0 {
-			tgts = []string{"all"}
+	tgts := make([]*Tgt, 0, len(args))
+	for _, arg := range args {
+		tgts = append(tgts, NewTgt(arg))
+	}
+	tgtsWasEmpty := len(tgts) == 0
+	if BuildUUIDStr == "" {
+		BuildUUID = uuid.New()
+		if tgtsWasEmpty {
+			tgts = append(tgts, NewTgt("all"))
+		}
+		tracef(CDebug, "inode-trust: %s", InodeTrust)
+	} else {
+		BuildUUID, err = uuid.Parse(BuildUUIDStr)
+		if err != nil {
+			log.Fatal(err)
 		}
 	}
 
-	statusInit()
+	if cmdName == CmdNameRedo {
+		statusInit()
+	}
 
-	for i, tgt := range tgts {
-		if path.IsAbs(tgt) {
-			tgts[i] = cwdMustRel(tgt)
+	killed := make(chan os.Signal, 1)
+	signal.Notify(killed, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		<-killed
+		tracef(CDebug, "[%s] killed", BuildUUID)
+		jsReleaseAll()
+		RunningProcsM.Lock()
+		for pid, proc := range RunningProcs {
+			tracef(CDebug, "[%s] killing child %d", BuildUUID, pid)
+			_ = proc.Signal(syscall.SIGTERM)
 		}
-	}
+		os.Exit(1)
+	}()
 
 	ok := true
 	err = nil
-	cmdName := path.Base(os.Args[0])
-	trace(
-		CDebug, "[%s] run: %s %s cwd:%s dirprefix:%s",
-		BuildUUID, cmdName, tgts, Cwd, DirPrefix,
-	)
+	tracef(CDebug, "[%s] run: %s %s cwd:%s dirprefix:%s",
+		BuildUUID, cmdName, tgts, Cwd, DirPrefix)
 
-CmdSwitch:
 	switch cmdName {
-	case "redo":
+	case CmdNameRedo:
 		for _, tgt := range tgts {
-			ok, err = ifchange([]string{tgt}, true, traced)
+			ok, err = ifchange([]*Tgt{tgt}, true, traced)
 			if err != nil || !ok {
 				break
 			}
 		}
-	case "redo-ifchange":
-		ok, err = ifchange(tgts, false, traced)
+	case CmdNameRedoIfchange:
+		ok, err = ifchange(tgts, *flagForcedIfchange, traced)
 		if err == nil {
-			err = writeDeps(fdDep, tgts)
+			err = depsWrite(fdDep, tgts)
 		}
-	case "redo-ifcreate":
+	case CmdNameRedoIfcreate:
 		if fdDep == nil {
 			log.Fatalln("no", EnvDepFd)
 		}
+		fdDepW := bufio.NewWriter(fdDep)
 		for _, tgt := range tgts {
-			err = ifcreate(fdDep, tgt)
+			err = ifcreate(fdDepW, fdDep.Name(), tgt.RelTo(path.Join(Cwd, DirPrefix)))
 			if err != nil {
 				break
 			}
 		}
-	case "redo-always":
+		err = fdDepW.Flush()
+	case CmdNameRedoAlways:
 		if fdDep == nil {
 			log.Fatalln("no", EnvDepFd)
 		}
-		err = always(fdDep)
-	case "redo-cleanup":
+		err = always(fdDep, fdDep.Name())
+	case CmdNameRedoCleanup:
 		for _, what := range tgts {
-			err = cleanupWalker(Cwd, what)
+			err = cleanupWalker(Cwd, path.Base(what.a))
 			if err != nil {
 				break
 			}
 		}
-	case "redo-dot":
+	case CmdNameRedoDot:
 		err = dotPrint(tgts)
-	case "redo-stamp":
+	case CmdNameRedoStamp:
 		if fdDep == nil {
 			log.Fatalln("no", EnvDepFd)
 		}
-		err = stamp(fdDep, os.Stdin)
-	case "redo-log":
+		var hsh Hash
+		hsh, err = fileHash(os.Stdin)
+		if err != nil {
+			break
+		}
+		err = stamp(fdDep, fdDep.Name(), hsh)
+	case CmdNameRedoLog:
+		if len(tgts) != 1 {
+			log.Fatal("single target expected")
+		}
+		err = showBuildLog(tgts[0], nil, 0)
+	case CmdNameRedoWhichdo:
 		if len(tgts) != 1 {
-			log.Fatalln("single target expected")
+			log.Fatal("single target expected")
+		}
+		var dos []string
+		dos, err = whichdo(tgts[0])
+		if err != nil {
+			if errors.Is(err, fs.ErrNotExist) {
+				err = nil
+				ok = false
+			} else {
+				break
+			}
+		}
+		for _, do := range dos {
+			fmt.Println(do)
+		}
+	case CmdNameRedoTargets:
+		raws := make([]string, 0, len(tgts))
+		for _, tgt := range tgts {
+			raws = append(raws, tgt.rel)
+		}
+		if tgtsWasEmpty {
+			raws = []string{Cwd}
 		}
-		d, t := cwdAndTgt(tgts[0])
-		var fd *os.File
-		fd, err = os.Open(path.Join(d, RedoDir, t+LogSuffix))
+		raws, err = targetsWalker(raws)
 		if err != nil {
+			err = ErrLine(err)
 			break
 		}
-		_, err = io.Copy(os.Stdout, fd)
-	case "redo-whichdo":
-		if len(tgts) != 1 {
-			log.Fatalln("single target expected")
+		sort.Strings(raws)
+		for _, tgt := range raws {
+			fmt.Println(tgt)
+		}
+	case CmdNameRedoAffects:
+		if tgtsWasEmpty {
+			log.Fatal("no targets specified")
+		}
+		var res []string
+		{
+			var tgtsKnown []string
+			tgtsKnown, err = targetsWalker([]string{Cwd})
+			if err != nil {
+				err = ErrLine(err)
+				break
+			}
+			deps := make(map[string]map[string]*Tgt)
+			for _, tgt := range tgtsKnown {
+				collectDeps(NewTgt(tgt), 0, deps, true)
+			}
+			seen := make(map[string]*Tgt)
+			for _, tgt := range tgts {
+				collectWholeDeps(deps[tgt.rel], deps, seen)
+			}
+			res = make([]string, 0, len(seen))
+			for _, dep := range seen {
+				res = append(res, dep.rel)
+			}
+		}
+		sort.Strings(res)
+		for _, dep := range res {
+			fmt.Println(dep)
+		}
+	case CmdNameRedoOOD:
+		raws := make([]string, 0, len(tgts))
+		for _, tgt := range tgts {
+			raws = append(raws, tgt.rel)
+		}
+		if tgtsWasEmpty {
+			raws, err = targetsWalker([]string{Cwd})
+			if err != nil {
+				break
+			}
+		}
+		sort.Strings(raws)
+		var ood bool
+		for _, tgt := range raws {
+			ood, err = isOOD(NewTgt(tgt), 0, nil)
+			if err != nil {
+				err = ErrLine(err)
+				break
+			}
+			if ood {
+				fmt.Println(tgt)
+			}
+		}
+	case CmdNameRedoSources:
+		srcs := make(map[string]*Tgt)
+		{
+			raws := make([]string, 0, len(tgts))
+			for _, tgt := range tgts {
+				raws = append(raws, tgt.rel)
+			}
+			if tgtsWasEmpty {
+				raws, err = targetsWalker([]string{Cwd})
+				if err != nil {
+					err = ErrLine(err)
+					break
+				}
+			}
+			sort.Strings(raws)
+			tgts = tgts[:0]
+			for _, raw := range raws {
+				tgts = append(tgts, NewTgt(raw))
+			}
+			seen := make(map[string]struct{})
+			seenDeps := make(map[string]struct{})
+			err = ErrLine(sourcesWalker(tgts, seen, seenDeps, srcs))
 		}
-		var fdTmp *os.File
-		fdTmp, err = ioutil.TempFile("", "whichdo")
 		if err != nil {
 			break
 		}
-		if err = os.Remove(fdTmp.Name()); err != nil {
+		res := make([]string, 0, len(srcs))
+		for _, tgt := range srcs {
+			res = append(res, tgt.rel)
+		}
+		srcs = nil
+		sort.Strings(res)
+		for _, src := range res {
+			fmt.Println(src)
+		}
+	case CmdNameRedoDepFix:
+		IfchangeCache = nil
+		DepFixHashCache = make(map[string]Hash)
+		err = depFix(Cwd)
+	case CmdNameRedoInode:
+		var inode *Inode
+		for _, tgt := range tgts {
+			inode, err = inodeFromFileByPath(tgt.a)
+			if err != nil {
+				err = ErrLine(err)
+				break
+			}
+			err = recfileWrite(os.Stdout, append(
+				[]recfile.Field{{Name: "Target", Value: tgt.String()}},
+				inode.RecfileFields()...)...)
+			if err != nil {
+				err = ErrLine(err)
+				break
+			}
+		}
+	case CmdNameRedoDep2Rec:
+		var data []byte
+		data, err = os.ReadFile(tgts[0].a)
+		if err != nil {
 			break
 		}
-		cwd, tgt := cwdAndTgt(tgts[0])
-		doFile, upLevels, err := findDo(fdTmp, cwd, tgt)
+		var build uuid.UUID
+		build, data, err = depHeadParse(data)
 		if err != nil {
 			break
 		}
-		_, err = fdTmp.Seek(0, os.SEEK_SET)
+		w := bufio.NewWriter(os.Stdout)
+		err = recfileWrite(w, []recfile.Field{
+			{Name: "Build", Value: build.String()},
+		}...)
 		if err != nil {
 			break
 		}
-		r := recfile.NewReader(fdTmp)
-		for {
-			m, err := r.NextMap()
-			if err != nil {
-				if err == io.EOF {
-					break
+		var typ byte
+		var chunk []byte
+		var inode Inode
+		for len(data) > 0 {
+			typ, chunk, data, _ = chunkRead(data)
+			switch typ {
+			case DepTypeAlways:
+				err = recfileWrite(w, []recfile.Field{
+					{Name: "Type", Value: "always"},
+				}...)
+			case DepTypeStamp:
+				err = recfileWrite(w, []recfile.Field{
+					{Name: "Type", Value: "stamp"},
+					{Name: "Hash", Value: hex.EncodeToString(chunk)},
+				}...)
+			case DepTypeIfcreate:
+				err = recfileWrite(w, []recfile.Field{
+					{Name: "Type", Value: "ifcreate"},
+					{Name: "Target", Value: string(chunk)},
+				}...)
+			case DepTypeIfchange:
+				name := string(chunk[InodeLen+HashLen:])
+				meta := chunk[:InodeLen+HashLen]
+				fields := []recfile.Field{
+					{Name: "Type", Value: "ifchange"},
+					{Name: "Target", Value: name},
 				}
-				break CmdSwitch
-			}
-			fmt.Println(cwdMustRel(cwd, m["Target"]))
-		}
-		if doFile == "" {
-			ok = false
-		} else {
-			p := make([]string, 0, upLevels+2)
-			p = append(p, cwd)
-			for i := 0; i < upLevels; i++ {
-				p = append(p, "..")
+				fields = append(fields, recfile.Field{
+					Name: "Hash", Value: Hash(meta[InodeLen:]).String(),
+				})
+				inode = Inode(meta[:][:InodeLen])
+				fields = append(fields, inode.RecfileFields()...)
+				err = recfileWrite(w, fields...)
+			case DepTypeIfchangeNonex:
+				err = recfileWrite(w, []recfile.Field{
+					{Name: "Type", Value: "ifchange"},
+					{Name: "Target", Value: string(chunk)},
+				}...)
 			}
-			p = append(p, doFile)
-			rel, err := filepath.Rel(Cwd, path.Join(p...))
 			if err != nil {
-				panic(err)
+				break
 			}
-			fmt.Println(rel)
 		}
+		err = w.Flush()
 	default:
 		log.Fatalln("unknown command", cmdName)
 	}
 	if err != nil {
-		log.Println(err)
+		log.Print(err)
 	}
 	rc := 0
 	if !ok || err != nil {
 		rc = 1
 	}
-	trace(CDebug, "[%s] finished: %s %s", BuildUUID, cmdName, tgts)
+	tracef(CDebug, "[%s] finished: %s %s", BuildUUID, cmdName, tgts)
 	os.Exit(rc)
 }