mirror of
https://github.com/go-gitea/gitea.git
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211 lines
4.6 KiB
Go
211 lines
4.6 KiB
Go
// 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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"fmt"
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"io"
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"os"
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"os/exec"
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"strings"
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"github.com/gogits/git"
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"github.com/gogits/gogs/modules/base"
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"github.com/gogits/gogs/modules/log"
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"github.com/gogits/gogs/modules/process"
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)
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// Diff line types.
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const (
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DIFF_LINE_PLAIN = 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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const (
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DIFF_FILE_ADD = iota + 1
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DIFF_FILE_CHANGE
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DIFF_FILE_DEL
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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 int
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Content string
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}
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func (d DiffLine) GetType() int {
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return 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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type DiffFile struct {
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Name string
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Index int
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Addition, Deletion int
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Type int
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IsBin bool
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Sections []*DiffSection
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}
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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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func ParsePatch(pid int64, cmd *exec.Cmd, reader io.Reader) (*Diff, error) {
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scanner := bufio.NewScanner(reader)
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var (
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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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)
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diff := &Diff{Files: make([]*DiffFile, 0)}
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var i int
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for scanner.Scan() {
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line := scanner.Text()
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// fmt.Println(i, line)
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if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") {
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continue
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}
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i = i + 1
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// Diff data too large.
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if i == 5000 {
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log.Warn("Diff data too large")
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return &Diff{}, nil
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}
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if line == "" {
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continue
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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[len(ss)-2][1:], " ")
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leftLine, _ = base.StrTo(strings.Split(ranges[0], ",")[0][1:]).Int()
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rightLine, _ = base.StrTo(strings.Split(ranges[1], ",")[0]).Int()
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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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fs := strings.Split(line[len(DIFF_HEAD):], " ")
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a := fs[0]
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curFile = &DiffFile{
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Name: a[strings.Index(a, "/")+1:],
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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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for scanner.Scan() {
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switch {
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case strings.HasPrefix(scanner.Text(), "new file"):
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curFile.Type = DIFF_FILE_ADD
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case strings.HasPrefix(scanner.Text(), "deleted"):
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curFile.Type = DIFF_FILE_DEL
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case strings.HasPrefix(scanner.Text(), "index"):
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curFile.Type = DIFF_FILE_CHANGE
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}
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if curFile.Type > 0 {
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break
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}
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}
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}
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}
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// In case process became zombie.
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if err := process.Kill(pid); err != nil {
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log.Error("git_diff.ParsePatch(Kill): %v", err)
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}
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return diff, nil
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}
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func GetDiff(repoPath, commitid string) (*Diff, error) {
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repo, err := git.OpenRepository(repoPath)
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if err != nil {
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return nil, err
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}
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commit, err := repo.GetCommit(commitid)
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if err != nil {
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return nil, err
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}
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rd, wr := io.Pipe()
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var cmd *exec.Cmd
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// First commit of repository.
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if commit.ParentCount() == 0 {
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cmd = exec.Command("git", "show", commitid)
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} else {
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c, _ := commit.Parent(0)
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cmd = exec.Command("git", "diff", c.Id.String(), commitid)
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}
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cmd.Dir = repoPath
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cmd.Stdout = wr
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cmd.Stdin = os.Stdin
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cmd.Stderr = os.Stderr
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go func() {
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cmd.Run()
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wr.Close()
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}()
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defer rd.Close()
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return ParsePatch(process.Add(fmt.Sprintf("GetDiff(%s)", repoPath), cmd), cmd, rd)
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}
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