X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=ood.go;h=717f2ac9fc7097a11c20f901ce583580caa0f8b8;hb=eb14a3333a632b22a4b698ca28fea6e6d11048b8;hp=0552e2016112a46b037976dbfc88f26adf677b2a;hpb=5ca39bfc0b769607db3f84213fc7f16f0c4019fa;p=goredo.git

diff --git a/ood.go b/ood.go
index 0552e20..717f2ac 100644
--- a/ood.go
+++ b/ood.go
@@ -22,10 +22,13 @@ package main
 import (
 	"errors"
 	"fmt"
+	"io"
 	"os"
 	"path"
 	"path/filepath"
 	"strings"
+
+	"golang.org/x/sys/unix"
 )
 
 const (
@@ -33,6 +36,15 @@ const (
 	DepTypeIfchange = "ifchange"
 	DepTypeAlways   = "always"
 	DepTypeStamp    = "stamp"
+
+	EnvOODTgtsFd     = "REDO_OOD_TGTS_FD"
+	EnvOODTgtsLockFd = "REDO_OOD_TGTS_LOCK_FD"
+)
+
+var (
+	OODTgts       map[string]struct{}
+	FdOODTgts     *os.File
+	FdOODTgtsLock *os.File
 )
 
 type TgtErr struct {
@@ -170,7 +182,7 @@ func isOOD(cwd, tgtOrig string, level int, seen map[string]struct{}) (bool, erro
 			continue
 		}
 
-		depOod, err := isOOD(cwd, dep, level+1, seen)
+		depOod, err := isOODWithTrace(cwd, dep, level+1, seen)
 		if err != nil {
 			return ood, TgtErr{tgtOrig, err}
 		}
@@ -186,3 +198,49 @@ Done:
 	trace(CDebug, "ood: %s%s: %v", indent, tgtOrig, ood)
 	return ood, nil
 }
+
+func isOODWithTrace(
+	cwd, tgtOrig string,
+	level int,
+	seen map[string]struct{},
+) (bool, error) {
+	p, err := filepath.Abs(path.Join(cwd, tgtOrig))
+	if err != nil {
+		panic(err)
+	}
+	_, ood := OODTgts[p]
+	if ood {
+		trace(
+			CDebug,
+			"ood: %s%s true, external decision",
+			strings.Repeat(". ", level), tgtOrig,
+		)
+		goto RecordOODTgt
+	}
+	ood, err = isOOD(cwd, tgtOrig, level, seen)
+	if !ood {
+		return ood, err
+	}
+RecordOODTgt:
+	if err = unix.Flock(int(FdOODTgtsLock.Fd()), unix.LOCK_EX); err != nil {
+		panic(err)
+	}
+	if _, err = FdOODTgts.Seek(0, io.SeekEnd); err != nil {
+		panic(err)
+	}
+	if _, err := FdOODTgts.WriteString(p + "\x00"); err != nil {
+		panic(err)
+	}
+	unix.Flock(int(FdOODTgtsLock.Fd()), unix.LOCK_UN)
+	return true, nil
+}
+
+func oodTgtsClear() {
+	if err := unix.Flock(int(FdOODTgtsLock.Fd()), unix.LOCK_EX); err != nil {
+		panic(err)
+	}
+	if err := FdOODTgts.Truncate(0); err != nil {
+		panic(err)
+	}
+	unix.Flock(int(FdOODTgtsLock.Fd()), unix.LOCK_UN)
+}