forked from beyang/hgo
/
cmdlog.go
216 lines (196 loc) · 4.5 KB
/
cmdlog.go
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// Copyright 2013 The hgo Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"io"
"strings"
"text/template"
"github.com/beyang/hgo/changelog"
"github.com/beyang/hgo/revlog"
)
var cmdLog = &Command{
UsageLine: "log [-R dir] [-r rev] [-l n] [-v] [file]",
Short: "list changeset information",
Long: ``,
}
func init() {
addStdFlags(cmdLog)
addRevFlag(cmdLog)
cmdLog.Run = runLog
}
var logL = cmdLog.Flag.Int("l", 0, "list at most n changesets")
const logTemplate = `{{range .}}changeset: {{.FileRev}}:{{.Id|short}}
{{with .Branch}}branch: {{.}}
{{end}}{{range index (tags) .Id}}tag: {{.}}
{{end}}{{if .Parent1NotPrevious}}parent: {{.Parent.FileRev}}:{{.Parent.Id}}
{{end}}{{if .Parent2Present}}parent: {{.Parent2.FileRev}}:{{.Parent2.Id}}
{{end}}user: {{.Committer}}
date: {{.Date.Format "Mon Jan 02 15:04:05 2006 -0700"}}
{{if verbose}}{{with .Files}}files: {{range $_, $i := .}} {{.}}{{end}}
{{end}}description:
{{.Comment}}
{{else}}summary: {{.Summary}}
{{end}}
{{end}}`
func runLog(cmd *Command, w io.Writer, args []string) {
openRepository(args)
rsFrom, rsTo := getRevisionRangeSpec()
fileArg := getFileArg(args)
st := repo.NewStore()
clIndex, err := st.OpenChangeLog()
if err != nil {
fatalf("%s", err)
}
allTags.Add("tip", clIndex.Tip().Id().Node())
rFrom := getRecord(clIndex, rsFrom)
rTo := rFrom
if rsTo != nil {
rTo = getRecord(clIndex, rsTo)
}
var logIndex *revlog.Index
wantFile := ""
wantDir := ""
if fileArg != "" && rTo != rFrom {
if fileIndex, err1 := st.OpenRevlog(fileArg); err1 != nil {
wantDir = fileArg + "/"
} else {
if rFrom.FileRev() > rTo.FileRev() {
rTo, rFrom = mapLinkrevToFilerevRange(fileIndex, rTo, rFrom)
} else {
rFrom, rTo = mapLinkrevToFilerevRange(fileIndex, rFrom, rTo)
}
if rFrom == nil && rTo == nil {
// range is empty
return
}
logIndex = clIndex
}
} else {
wantFile = fileArg
}
err = printChangelog(w, rFrom, rTo, logIndex, allTags.ById, wantDir, wantFile)
if err != nil {
fatalf("%s", err)
}
}
func printChangelog(w io.Writer, rFrom, rTo *revlog.Rec, logIndex *revlog.Index, tags map[string][]string, wantDirPrefix, wantFile string) (err error) {
var clr *revlog.Rec
match := func([]string) bool { return true }
if wantFile != "" {
match = func(files []string) (ok bool) {
for _, f := range files {
if f == wantFile {
ok = true
return
}
}
return
}
} else if wantDirPrefix != "" {
match = func(files []string) (ok bool) {
for _, f := range files {
if strings.HasPrefix(f, wantDirPrefix) {
ok = true
return
}
}
return
}
}
fb := revlog.NewFileBuilder()
fb.SetDataCache(&dc)
fb.KeepDataOpen()
defer fb.CloseData()
t, err := setupLogTemplate(logTemplate, tags)
if err != nil {
return
}
ch := make(chan *changelog.Entry, 16)
errch := make(chan error, 0)
go func() {
errch <- t.Execute(w, ch)
}()
r := rFrom
target := rTo.FileRev()
var next func()
if rFrom.FileRev() > target {
next = func() { r = r.Prev() }
} else {
next = func() { r = r.Next() }
}
i := 0
for {
if logIndex == nil {
clr = r
} else {
clr, err = revlog.FileRevSpec(r.Linkrev).Lookup(logIndex)
if err != nil {
return
}
}
c, err1 := changelog.BuildEntry(clr, fb)
if err1 != nil {
err = err1
return
}
c.Rec = clr
if match(c.Files) {
select {
case ch <- c:
i++
case err = <-errch:
return
}
}
if r.FileRev() == target {
break
}
next()
if r.FileRev() == -1 {
break
}
if *logL != 0 && i == *logL {
break
}
}
close(ch)
err = <-errch
return
}
func setupLogTemplate(tpl string, tags map[string][]string) (*template.Template, error) {
t := template.New("logentry")
t.Funcs(template.FuncMap{
"verbose": func() bool {
return verbose
},
"short": func(s string) string {
if len(s) > 12 {
return s[:12]
}
return s
},
"tags": func() map[string][]string {
return tags
},
})
return t.Parse(tpl)
}
func mapLinkrevToFilerevRange(i *revlog.Index, rLo, rHi *revlog.Rec) (r1, r2 *revlog.Rec) {
r1 = getRecord(i, revlog.NewLinkRevSpec(int(rLo.Linkrev)))
r2 = getRecord(i, revlog.NewLinkRevSpec(int(rHi.Linkrev)))
if r1.Linkrev < rLo.Linkrev {
if r1.Linkrev == r2.Linkrev {
goto emptyRange
}
r1 = r1.Next()
}
if r1.Linkrev == r2.Linkrev && r2.Linkrev < rHi.Linkrev {
goto emptyRange
}
return
emptyRange:
r1 = nil
r2 = nil
return
}