mirror of
https://github.com/go-gitea/gitea.git
synced 2024-11-16 02:18:22 -07:00
303 lines
6.9 KiB
Go
303 lines
6.9 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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"bytes"
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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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"time"
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"golang.org/x/net/html/charset"
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"golang.org/x/text/transform"
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"github.com/Unknwon/com"
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"github.com/gogits/gogs/modules/base"
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"github.com/gogits/gogs/modules/git"
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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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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 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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OldName string
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Index int
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Addition, Deletion int
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Type int
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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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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, maxlines int, 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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// FIXME: Should use cache in the future.
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buf bytes.Buffer
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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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if 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, we only show the first about maxlines lines
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if i >= maxlines {
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log.Warn("Diff data too large")
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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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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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// Note: In case file name is surrounded by double quotes(it happens only in git-shell).
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hasQuote := strings.Index(line, `\"`) > -1
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if hasQuote {
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line = strings.Replace(line, `\"`, `"`, -1)
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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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a = a[1 : len(a)-1]
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b = b[1 : len(b)-1]
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}
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fmt.Println(a, b)
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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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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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curFile.IsCreated = true
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case strings.HasPrefix(scanner.Text(), "deleted"):
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curFile.Type = DIFF_FILE_DEL
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curFile.IsDeleted = true
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case strings.HasPrefix(scanner.Text(), "index"):
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curFile.Type = DIFF_FILE_CHANGE
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case strings.HasPrefix(scanner.Text(), "similarity index 100%"):
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curFile.Type = DIFF_FILE_RENAME
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curFile.IsRenamed = true
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curFile.OldName = curFile.Name
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curFile.Name = b
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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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for _, f := range diff.Files {
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buf.Reset()
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for _, sec := range f.Sections {
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for _, l := range sec.Lines {
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buf.WriteString(l.Content)
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buf.WriteString("\n")
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}
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}
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charsetLabel, err := base.DetectEncoding(buf.Bytes())
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if charsetLabel != "UTF-8" && err == nil {
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encoding, _ := charset.Lookup(charsetLabel)
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if encoding != nil {
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d := encoding.NewDecoder()
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for _, sec := range f.Sections {
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for _, l := range sec.Lines {
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if c, _, err := transform.String(d, l.Content); err == nil {
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l.Content = c
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}
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}
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}
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}
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}
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}
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return diff, nil
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}
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func GetDiffRange(repoPath, beforeCommitId string, afterCommitId string, maxlines int) (*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(afterCommitId)
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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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// if "after" commit given
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if beforeCommitId == "" {
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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", afterCommitId)
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} else {
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c, _ := commit.Parent(0)
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cmd = exec.Command("git", "diff", "-M", c.Id.String(), afterCommitId)
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}
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} else {
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cmd = exec.Command("git", "diff", "-M", beforeCommitId, afterCommitId)
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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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done := make(chan error)
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go func() {
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cmd.Start()
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done <- cmd.Wait()
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wr.Close()
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}()
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defer rd.Close()
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desc := fmt.Sprintf("GetDiffRange(%s)", repoPath)
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pid := process.Add(desc, cmd)
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go func() {
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// In case process became zombie.
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select {
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case <-time.After(5 * time.Minute):
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if errKill := process.Kill(pid); errKill != nil {
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log.Error(4, "git_diff.ParsePatch(Kill): %v", err)
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}
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<-done
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// return "", ErrExecTimeout.Error(), ErrExecTimeout
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case err = <-done:
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process.Remove(pid)
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}
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}()
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return ParsePatch(pid, maxlines, cmd, rd)
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}
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func GetDiffCommit(repoPath, commitId string, maxlines int) (*Diff, error) {
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return GetDiffRange(repoPath, "", commitId, maxlines)
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}
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