2014-04-13 09:35:36 +08:00
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// Copyright 2014 The Gogs Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package models
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import (
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"bufio"
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"bytes"
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2014-06-19 13:08:03 +08:00
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"fmt"
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2014-04-13 09:35:36 +08:00
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"io"
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"io/ioutil"
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2014-04-13 09:35:36 +08:00
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"os"
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"os/exec"
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"strings"
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2016-01-04 05:26:46 +08:00
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"html/template"
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"html"
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2014-04-13 09:35:36 +08:00
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2015-12-02 14:10:13 +08:00
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"github.com/Unknwon/com"
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2014-12-22 17:01:52 +08:00
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"golang.org/x/net/html/charset"
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"golang.org/x/text/transform"
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2016-01-07 21:27:35 +08:00
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"github.com/sergi/go-diff/diffmatchpatch"
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2014-12-22 17:01:52 +08:00
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2015-12-16 06:25:45 +08:00
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"github.com/gogits/git-module"
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2014-07-26 12:24:27 +08:00
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2014-12-09 15:18:25 +08:00
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"github.com/gogits/gogs/modules/base"
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2014-04-13 09:35:36 +08:00
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"github.com/gogits/gogs/modules/log"
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2014-06-19 13:08:03 +08:00
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"github.com/gogits/gogs/modules/process"
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2014-04-13 09:35:36 +08:00
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)
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2016-01-07 04:00:40 +08:00
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type DiffLineType uint8
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const (
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DIFF_LINE_PLAIN DiffLineType = iota + 1
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DIFF_LINE_ADD
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DIFF_LINE_DEL
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DIFF_LINE_SECTION
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)
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type DiffFileType uint8
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const (
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DIFF_FILE_ADD DiffFileType = iota + 1
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DIFF_FILE_CHANGE
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DIFF_FILE_DEL
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DIFF_FILE_RENAME
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)
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type DiffLine struct {
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LeftIdx int
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RightIdx int
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Type DiffLineType
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Content string
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ParsedContent template.HTML
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}
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func (d *DiffLine) GetType() int {
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return int(d.Type)
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}
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type DiffSection struct {
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Name string
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Lines []*DiffLine
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}
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func diffToHtml(diffRecord []diffmatchpatch.Diff, lineType DiffLineType) template.HTML {
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result := ""
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for _, s := range diffRecord {
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if s.Type == diffmatchpatch.DiffInsert && lineType == DIFF_LINE_ADD {
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result = result + "<span class=\"added-code\">"+html.EscapeString(s.Text)+"</span>"
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} else if s.Type == diffmatchpatch.DiffDelete && lineType == DIFF_LINE_DEL {
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result = result + "<span class=\"removed-code\">"+html.EscapeString(s.Text)+"</span>"
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} else if s.Type == diffmatchpatch.DiffEqual {
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result = result + html.EscapeString(s.Text)
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}
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}
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return template.HTML(result)
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}
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func (diffSection *DiffSection) GetLeftLine(idx int, sliceIdx int) *DiffLine {
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for i, diffLine := range diffSection.Lines {
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if diffLine.LeftIdx == idx && diffLine.RightIdx == 0 {
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// ignore if the lines are too far from each other
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if i > sliceIdx-5 && i < sliceIdx+5 {
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return diffLine
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} else {
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return nil
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}
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}
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}
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return nil
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}
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func (diffSection *DiffSection) GetRightLine(idx int, sliceIdx int) *DiffLine {
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for i, diffLine := range diffSection.Lines {
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if diffLine.RightIdx == idx && diffLine.LeftIdx == 0 {
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// ignore if the lines are too far from each other
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if i > sliceIdx-5 && i < sliceIdx+5 {
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return diffLine
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} else {
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return nil
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}
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}
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}
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return nil
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}
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// computes diff of each diff line and set the HTML on diffLine.ParsedContent
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func (diffSection *DiffSection) ComputeLinesDiff() {
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for i, diffLine := range diffSection.Lines {
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var compareDiffLine *DiffLine
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var diff1, diff2 string
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// default content: as is
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diffLine.ParsedContent = template.HTML(html.EscapeString(diffLine.Content[1:]))
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// just compute diff for adds and removes
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if diffLine.Type != DIFF_LINE_ADD && diffLine.Type != DIFF_LINE_DEL {
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continue
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}
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// try to find equivalent diff line. ignore, otherwise
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if diffLine.Type == DIFF_LINE_ADD {
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compareDiffLine = diffSection.GetLeftLine(diffLine.RightIdx, i)
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if compareDiffLine == nil {
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continue
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}
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diff1 = compareDiffLine.Content
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diff2 = diffLine.Content
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} else {
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compareDiffLine = diffSection.GetRightLine(diffLine.LeftIdx, i)
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if compareDiffLine == nil {
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continue
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}
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diff1 = diffLine.Content
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diff2 = compareDiffLine.Content
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}
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dmp := diffmatchpatch.New()
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diffRecord := dmp.DiffMain(diff1[1:], diff2[1:], true)
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diffRecord = dmp.DiffCleanupSemantic(diffRecord)
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diffLine.ParsedContent = diffToHtml(diffRecord, diffLine.Type)
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}
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}
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type DiffFile struct {
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Name string
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OldName string
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Index int
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Addition, Deletion int
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Type DiffFileType
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IsCreated bool
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IsDeleted bool
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IsBin bool
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IsRenamed bool
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Sections []*DiffSection
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}
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func (diffFile *DiffFile) GetType() int {
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return int(diffFile.Type)
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}
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2014-04-13 09:35:36 +08:00
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type Diff struct {
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TotalAddition, TotalDeletion int
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Files []*DiffFile
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}
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func (diff *Diff) NumFiles() int {
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return len(diff.Files)
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}
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const DIFF_HEAD = "diff --git "
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2015-12-02 14:10:13 +08:00
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func ParsePatch(maxlines int, reader io.Reader) (*Diff, error) {
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var (
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diff = &Diff{Files: make([]*DiffFile, 0)}
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2014-04-13 09:35:36 +08:00
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curFile *DiffFile
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curSection = &DiffSection{
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Lines: make([]*DiffLine, 0, 10),
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}
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leftLine, rightLine int
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lineCount int
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)
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2015-12-02 14:10:13 +08:00
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input := bufio.NewReader(reader)
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isEOF := false
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for {
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if isEOF {
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break
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}
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2015-11-04 06:25:39 +08:00
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2015-12-02 14:10:13 +08:00
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line, err := input.ReadString('\n')
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if err != nil {
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if err == io.EOF {
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isEOF = true
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} else {
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return nil, fmt.Errorf("ReadString: %v", err)
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}
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}
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if len(line) > 0 && line[len(line)-1] == '\n' {
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// Remove line break.
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line = line[:len(line)-1]
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}
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2015-12-02 14:10:13 +08:00
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if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") {
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continue
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} else if len(line) == 0 {
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continue
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}
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lineCount++
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2014-09-17 12:03:03 +08:00
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// Diff data too large, we only show the first about maxlines lines
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if lineCount >= maxlines {
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log.Warn("Diff data too large")
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io.Copy(ioutil.Discard, reader)
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diff.Files = nil
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return diff, nil
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}
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switch {
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case line[0] == ' ':
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diffLine := &DiffLine{Type: DIFF_LINE_PLAIN, Content: line, LeftIdx: leftLine, RightIdx: rightLine}
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leftLine++
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rightLine++
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curSection.Lines = append(curSection.Lines, diffLine)
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continue
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case line[0] == '@':
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curSection = &DiffSection{}
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curFile.Sections = append(curFile.Sections, curSection)
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ss := strings.Split(line, "@@")
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diffLine := &DiffLine{Type: DIFF_LINE_SECTION, Content: line}
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curSection.Lines = append(curSection.Lines, diffLine)
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// Parse line number.
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ranges := strings.Split(ss[1][1:], " ")
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leftLine, _ = com.StrTo(strings.Split(ranges[0], ",")[0][1:]).Int()
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2015-07-29 22:55:01 +08:00
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if len(ranges) > 1 {
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rightLine, _ = com.StrTo(strings.Split(ranges[1], ",")[0]).Int()
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} else {
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log.Warn("Parse line number failed: %v", line)
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rightLine = leftLine
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}
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continue
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case line[0] == '+':
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curFile.Addition++
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diff.TotalAddition++
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diffLine := &DiffLine{Type: DIFF_LINE_ADD, Content: line, RightIdx: rightLine}
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rightLine++
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curSection.Lines = append(curSection.Lines, diffLine)
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continue
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case line[0] == '-':
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curFile.Deletion++
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diff.TotalDeletion++
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diffLine := &DiffLine{Type: DIFF_LINE_DEL, Content: line, LeftIdx: leftLine}
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if leftLine > 0 {
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leftLine++
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}
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curSection.Lines = append(curSection.Lines, diffLine)
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case strings.HasPrefix(line, "Binary"):
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curFile.IsBin = true
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continue
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}
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// Get new file.
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if strings.HasPrefix(line, DIFF_HEAD) {
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middle := -1
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2015-11-20 14:18:50 +08:00
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// Note: In case file name is surrounded by double quotes (it happens only in git-shell).
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// e.g. diff --git "a/xxx" "b/xxx"
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hasQuote := line[len(DIFF_HEAD)] == '"'
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if hasQuote {
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middle = strings.Index(line, ` "b/`)
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} else {
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middle = strings.Index(line, " b/")
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}
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beg := len(DIFF_HEAD)
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a := line[beg+2 : middle]
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b := line[middle+3:]
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if hasQuote {
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2015-11-20 14:18:50 +08:00
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a = string(git.UnescapeChars([]byte(a[1 : len(a)-1])))
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b = string(git.UnescapeChars([]byte(b[1 : len(b)-1])))
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}
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curFile = &DiffFile{
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Name: a,
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Index: len(diff.Files) + 1,
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Type: DIFF_FILE_CHANGE,
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Sections: make([]*DiffSection, 0, 10),
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}
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diff.Files = append(diff.Files, curFile)
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// Check file diff type.
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2015-12-02 14:10:13 +08:00
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for {
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line, err := input.ReadString('\n')
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if err != nil {
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if err == io.EOF {
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isEOF = true
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} else {
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return nil, fmt.Errorf("ReadString: %v", err)
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}
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}
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switch {
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case strings.HasPrefix(line, "new file"):
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curFile.Type = DIFF_FILE_ADD
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curFile.IsCreated = true
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case strings.HasPrefix(line, "deleted"):
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curFile.Type = DIFF_FILE_DEL
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curFile.IsDeleted = true
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case strings.HasPrefix(line, "index"):
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curFile.Type = DIFF_FILE_CHANGE
|
2015-12-02 14:10:13 +08:00
|
|
|
case strings.HasPrefix(line, "similarity index 100%"):
|
2015-11-03 08:55:24 +08:00
|
|
|
curFile.Type = DIFF_FILE_RENAME
|
|
|
|
curFile.IsRenamed = true
|
|
|
|
curFile.OldName = curFile.Name
|
|
|
|
curFile.Name = b
|
2014-04-13 09:35:36 +08:00
|
|
|
}
|
|
|
|
if curFile.Type > 0 {
|
|
|
|
break
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-12-02 14:10:13 +08:00
|
|
|
// FIXME: detect encoding while parsing.
|
|
|
|
var buf bytes.Buffer
|
2015-07-29 22:55:01 +08:00
|
|
|
for _, f := range diff.Files {
|
|
|
|
buf.Reset()
|
|
|
|
for _, sec := range f.Sections {
|
|
|
|
for _, l := range sec.Lines {
|
|
|
|
buf.WriteString(l.Content)
|
|
|
|
buf.WriteString("\n")
|
|
|
|
}
|
|
|
|
}
|
2016-01-01 11:13:47 +08:00
|
|
|
charsetLabel, err := base.DetectEncoding(buf.Bytes())
|
|
|
|
if charsetLabel != "UTF-8" && err == nil {
|
2015-07-29 22:55:01 +08:00
|
|
|
encoding, _ := charset.Lookup(charsetLabel)
|
|
|
|
if encoding != nil {
|
|
|
|
d := encoding.NewDecoder()
|
2014-12-09 15:18:25 +08:00
|
|
|
for _, sec := range f.Sections {
|
|
|
|
for _, l := range sec.Lines {
|
2014-12-22 17:01:52 +08:00
|
|
|
if c, _, err := transform.String(d, l.Content); err == nil {
|
|
|
|
l.Content = c
|
|
|
|
}
|
2014-12-09 15:18:25 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2014-04-13 09:35:36 +08:00
|
|
|
return diff, nil
|
|
|
|
}
|
|
|
|
|
2015-12-02 14:10:13 +08:00
|
|
|
func GetDiffRange(repoPath, beforeCommitID string, afterCommitID string, maxlines int) (*Diff, error) {
|
2014-04-13 09:35:36 +08:00
|
|
|
repo, err := git.OpenRepository(repoPath)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
2015-12-02 14:10:13 +08:00
|
|
|
commit, err := repo.GetCommit(afterCommitID)
|
2014-04-13 09:35:36 +08:00
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
2014-05-29 10:15:15 +08:00
|
|
|
var cmd *exec.Cmd
|
2014-08-26 20:20:18 +08:00
|
|
|
// if "after" commit given
|
2015-12-02 14:10:13 +08:00
|
|
|
if len(beforeCommitID) == 0 {
|
2014-08-26 20:20:18 +08:00
|
|
|
// First commit of repository.
|
|
|
|
if commit.ParentCount() == 0 {
|
2015-12-02 14:10:13 +08:00
|
|
|
cmd = exec.Command("git", "show", afterCommitID)
|
2014-08-26 20:20:18 +08:00
|
|
|
} else {
|
|
|
|
c, _ := commit.Parent(0)
|
2015-12-02 14:10:13 +08:00
|
|
|
cmd = exec.Command("git", "diff", "-M", c.ID.String(), afterCommitID)
|
2014-08-26 20:20:18 +08:00
|
|
|
}
|
2014-05-29 10:15:15 +08:00
|
|
|
} else {
|
2015-12-02 14:10:13 +08:00
|
|
|
cmd = exec.Command("git", "diff", "-M", beforeCommitID, afterCommitID)
|
2014-04-13 09:35:36 +08:00
|
|
|
}
|
2014-05-29 10:15:15 +08:00
|
|
|
cmd.Dir = repoPath
|
|
|
|
cmd.Stderr = os.Stderr
|
2014-07-07 05:32:36 +08:00
|
|
|
|
2015-12-02 14:10:13 +08:00
|
|
|
stdout, err := cmd.StdoutPipe()
|
|
|
|
if err != nil {
|
|
|
|
return nil, fmt.Errorf("StdoutPipe: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
if err = cmd.Start(); err != nil {
|
|
|
|
return nil, fmt.Errorf("Start: %v", err)
|
|
|
|
}
|
2014-07-07 05:32:36 +08:00
|
|
|
|
2015-12-02 14:10:13 +08:00
|
|
|
pid := process.Add(fmt.Sprintf("GetDiffRange (%s)", repoPath), cmd)
|
|
|
|
defer process.Remove(pid)
|
|
|
|
|
|
|
|
diff, err := ParsePatch(maxlines, stdout)
|
|
|
|
if err != nil {
|
|
|
|
return nil, fmt.Errorf("ParsePatch: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
if err = cmd.Wait(); err != nil {
|
|
|
|
return nil, fmt.Errorf("Wait: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
return diff, nil
|
2014-04-13 09:35:36 +08:00
|
|
|
}
|
2014-08-26 20:20:18 +08:00
|
|
|
|
2014-09-17 12:03:03 +08:00
|
|
|
func GetDiffCommit(repoPath, commitId string, maxlines int) (*Diff, error) {
|
|
|
|
return GetDiffRange(repoPath, "", commitId, maxlines)
|
2014-08-26 20:20:18 +08:00
|
|
|
}
|