Do not use deprecated os.SEEK_*

[goredo.git] / dep.go

diff --git a/dep.go b/dep.go
index 0c5b6348740393340435a7c81a3d9c85b5274324..bbd7310171fb5d43183e544425f5676d91fe381d 100644 (file)
--- a/dep.go
+++ b/dep.go
@@ -1,5 +1,5 @@
 /*
-goredo -- redo implementation on pure Go
+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
@@ -23,14 +23,12 @@ import (
        "bufio"
        "encoding/hex"
        "errors"
-       "fmt"
        "io"
        "os"
        "path"
        "path/filepath"
 
        "go.cypherpunks.ru/recfile"
-       "golang.org/x/sys/unix"
        "lukechampine.com/blake3"
 )
 
@@ -75,15 +73,6 @@ func stamp(fdDep, src *os.File) error {
        )
 }
 
-func fileCtime(fd *os.File) (string, error) {
-       var stat unix.Stat_t
-       if err := unix.Fstat(int(fd.Fd()), &stat); err != nil {
-               return "", err
-       }
-       sec, nsec := stat.Ctim.Unix()
-       return fmt.Sprintf("%d.%d", sec, nsec), nil
-}
-
 func fileHash(fd *os.File) (string, error) {
        h := blake3.New(32, nil)
        if _, err := io.Copy(h, bufio.NewReader(fd)); err != nil {
@@ -106,7 +95,7 @@ func writeDep(fdDep *os.File, cwd, tgt string) error {
        if fi.IsDir() {
                return nil
        }
-       ts, err := fileCtime(fd)
+       inode, err := inodeFromFile(fd)
        if err != nil {
                return err
        }
@@ -114,39 +103,44 @@ func writeDep(fdDep *os.File, cwd, tgt string) error {
        if err != nil {
                return err
        }
-       return recfileWrite(
-               fdDep,
-               recfile.Field{Name: "Type", Value: DepTypeIfchange},
-               recfile.Field{Name: "Target", Value: tgt},
-               recfile.Field{Name: "Ctime", Value: ts},
-               recfile.Field{Name: "Hash", Value: hsh},
-       )
+       fields := []recfile.Field{
+               {Name: "Type", Value: DepTypeIfchange},
+               {Name: "Target", Value: tgt},
+               {Name: "Hash", Value: hsh},
+       }
+       fields = append(fields, inode.RecfileFields()...)
+       return recfileWrite(fdDep, fields...)
 }
 
-func writeDeps(fdDep *os.File, tgts []string) error {
+func writeDeps(fdDep *os.File, tgts []string) (err error) {
        if fdDep == nil {
                trace(CDebug, "no opened fdDep: %s", tgts)
                return nil
        }
        for _, tgt := range tgts {
-               if _, err := os.Stat(tgt); err == nil {
-                       tgtAbs, err := filepath.Abs(tgt)
-                       if err != nil {
-                               panic(err)
-                       }
-                       tgtDir := path.Join(Cwd, DirPrefix)
-                       tgtRel, err := filepath.Rel(tgtDir, tgtAbs)
-                       if err != nil {
-                               panic(err)
-                       }
-                       if err = writeDep(fdDep, tgtDir, tgtRel); err != nil {
-                               return err
-                       }
+               tgtAbs, err := filepath.Abs(tgt)
+               if err != nil {
+                       panic(err)
+               }
+               tgtDir := path.Join(Cwd, DirPrefix)
+               tgtRel, err := filepath.Rel(tgtDir, tgtAbs)
+               if err != nil {
+                       panic(err)
+               }
+               if _, errStat := os.Stat(tgt); errStat == nil {
+                       err = writeDep(fdDep, tgtDir, tgtRel)
                } else {
-                       trace(CDebug, "skipping dep record, can not stat: %s", tgt)
+                       trace(CDebug, "ifchange: %s <- %s (unexisting)", fdDep.Name(), tgtRel)
+                       fields := []recfile.Field{
+                               {Name: "Type", Value: DepTypeIfchange},
+                               {Name: "Target", Value: tgtRel},
+                       }
+                       inodeDummy := Inode{}
+                       fields = append(fields, inodeDummy.RecfileFields()...)
+                       err = recfileWrite(fdDep, fields...)
                }
        }
-       return nil
+       return
 }
 
 type DepInfo struct {
@@ -165,7 +159,7 @@ func depRead(fdDep *os.File) (*DepInfo, error) {
        }
        depInfo := DepInfo{}
        if b := m["Build"]; b == "" {
-               return nil, errors.New(".dep missing Build:")
+               return nil, errors.New(".rec missing Build:")
        } else {
                depInfo.build = b
        }
@@ -183,7 +177,7 @@ func depRead(fdDep *os.File) (*DepInfo, error) {
                case DepTypeIfcreate:
                        dep := m["Target"]
                        if dep == "" {
-                               return nil, errors.New("invalid format of .dep")
+                               return nil, errors.New("invalid format of .rec")
                        }
                        depInfo.ifcreates = append(depInfo.ifcreates, dep)
                case DepTypeIfchange:
@@ -192,11 +186,11 @@ func depRead(fdDep *os.File) (*DepInfo, error) {
                case DepTypeStamp:
                        hsh := m["Hash"]
                        if hsh == "" {
-                               return nil, errors.New("invalid format of .dep")
+                               return nil, errors.New("invalid format of .rec")
                        }
                        depInfo.stamp = hsh
                default:
-                       return nil, errors.New("invalid format of .dep")
+                       return nil, errors.New("invalid format of .rec")
                }
        }
        return &depInfo, nil