/*
goredo -- redo implementation on pure Go
-Copyright (C) 2020 Sergey Matveev <stargrave@stargrave.org>
+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
import (
"bufio"
"encoding/hex"
+ "errors"
"fmt"
"io"
"os"
"golang.org/x/crypto/blake2b"
)
-const EnvNoHash = "REDO_NO_HASH"
-
-var NoHash bool
-
func recfileWrite(fdDep *os.File, fields ...recfile.Field) error {
w := recfile.NewWriter(fdDep)
if _, err := w.RecordStart(); err != nil {
trace(CDebug, "ifcreate: %s <- %s", fdDep.Name(), tgt)
return recfileWrite(
fdDep,
- recfile.Field{Name: "Type", Value: "ifcreate"},
+ recfile.Field{Name: "Type", Value: DepTypeIfcreate},
recfile.Field{Name: "Target", Value: tgt},
)
}
func always(fdDep *os.File) error {
trace(CDebug, "always: %s", fdDep.Name())
- return recfileWrite(fdDep, recfile.Field{Name: "Type", Value: "always"})
+ return recfileWrite(fdDep, recfile.Field{Name: "Type", Value: DepTypeAlways})
}
func stamp(fdDep, src *os.File) error {
trace(CDebug, "stamp: %s <- %s", fdDep.Name(), hsh)
return recfileWrite(
fdDep,
- recfile.Field{Name: "Type", Value: "stamp"},
+ recfile.Field{Name: "Type", Value: DepTypeStamp},
recfile.Field{Name: "Hash", Value: hsh},
)
}
if err != nil {
return err
}
- fields := []recfile.Field{
- recfile.Field{Name: "Type", Value: "ifchange"},
+ hsh, err := fileHash(fd)
+ 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},
- }
- var hsh string
- if !NoHash {
- hsh, err = fileHash(fd)
- if err != nil {
- return err
- }
- fields = append(fields, recfile.Field{Name: "Hash", Value: hsh})
- }
- err = recfileWrite(fdDep, fields...)
- return err
+ recfile.Field{Name: "Hash", Value: hsh},
+ )
}
func writeDeps(fdDep *os.File, tgts []string) error {
}
return nil
}
+
+type DepInfo struct {
+ build string
+ always bool
+ stamp string
+ ifcreates []string
+ ifchanges []map[string]string
+}
+
+func depRead(fdDep *os.File) (*DepInfo, error) {
+ r := recfile.NewReader(fdDep)
+ m, err := r.NextMap()
+ if err != nil {
+ return nil, err
+ }
+ depInfo := DepInfo{}
+ if b := m["Build"]; b == "" {
+ return nil, errors.New(".dep missing Build:")
+ } else {
+ depInfo.build = b
+ }
+ for {
+ m, err := r.NextMap()
+ if err != nil {
+ if err == io.EOF {
+ break
+ }
+ return nil, err
+ }
+ switch m["Type"] {
+ case DepTypeAlways:
+ depInfo.always = true
+ case DepTypeIfcreate:
+ dep := m["Target"]
+ if dep == "" {
+ return nil, errors.New("invalid format of .dep")
+ }
+ depInfo.ifcreates = append(depInfo.ifcreates, dep)
+ case DepTypeIfchange:
+ delete(m, "Type")
+ depInfo.ifchanges = append(depInfo.ifchanges, m)
+ case DepTypeStamp:
+ hsh := m["Hash"]
+ if hsh == "" {
+ return nil, errors.New("invalid format of .dep")
+ }
+ depInfo.stamp = hsh
+ default:
+ return nil, errors.New("invalid format of .dep")
+ }
+ }
+ return &depInfo, nil
+}