mirror of
https://github.com/go-gitea/gitea
synced 2024-12-22 10:04:11 +01:00
534 lines
13 KiB
Go
534 lines
13 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package models
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"fmt"
|
|
"html"
|
|
"html/template"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"os/exec"
|
|
"strings"
|
|
|
|
"code.gitea.io/git"
|
|
"code.gitea.io/gitea/modules/base"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/process"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
"code.gitea.io/gitea/modules/template/highlight"
|
|
"github.com/Unknwon/com"
|
|
"github.com/sergi/go-diff/diffmatchpatch"
|
|
"golang.org/x/net/html/charset"
|
|
"golang.org/x/text/transform"
|
|
)
|
|
|
|
// DiffLineType represents the type of a DiffLine.
|
|
type DiffLineType uint8
|
|
|
|
// DiffLineType possible values.
|
|
const (
|
|
DiffLinePlain DiffLineType = iota + 1
|
|
DiffLineAdd
|
|
DiffLineDel
|
|
DiffLineSection
|
|
)
|
|
|
|
// DiffFileType represents the type of a DiffFile.
|
|
type DiffFileType uint8
|
|
|
|
// DiffFileType possible values.
|
|
const (
|
|
DiffFileAdd DiffFileType = iota + 1
|
|
DiffFileChange
|
|
DiffFileDel
|
|
DiffFileRename
|
|
)
|
|
|
|
// DiffLine represents a line difference in a DiffSection.
|
|
type DiffLine struct {
|
|
LeftIdx int
|
|
RightIdx int
|
|
Type DiffLineType
|
|
Content string
|
|
}
|
|
|
|
// GetType returns the type of a DiffLine.
|
|
func (d *DiffLine) GetType() int {
|
|
return int(d.Type)
|
|
}
|
|
|
|
// DiffSection represents a section of a DiffFile.
|
|
type DiffSection struct {
|
|
Name string
|
|
Lines []*DiffLine
|
|
}
|
|
|
|
var (
|
|
addedCodePrefix = []byte("<span class=\"added-code\">")
|
|
removedCodePrefix = []byte("<span class=\"removed-code\">")
|
|
codeTagSuffix = []byte("</span>")
|
|
)
|
|
|
|
func diffToHTML(diffs []diffmatchpatch.Diff, lineType DiffLineType) template.HTML {
|
|
buf := bytes.NewBuffer(nil)
|
|
|
|
// Reproduce signs which are cutted for inline diff before.
|
|
switch lineType {
|
|
case DiffLineAdd:
|
|
buf.WriteByte('+')
|
|
case DiffLineDel:
|
|
buf.WriteByte('-')
|
|
}
|
|
|
|
for i := range diffs {
|
|
switch {
|
|
case diffs[i].Type == diffmatchpatch.DiffInsert && lineType == DiffLineAdd:
|
|
buf.Write(addedCodePrefix)
|
|
buf.WriteString(html.EscapeString(diffs[i].Text))
|
|
buf.Write(codeTagSuffix)
|
|
case diffs[i].Type == diffmatchpatch.DiffDelete && lineType == DiffLineDel:
|
|
buf.Write(removedCodePrefix)
|
|
buf.WriteString(html.EscapeString(diffs[i].Text))
|
|
buf.Write(codeTagSuffix)
|
|
case diffs[i].Type == diffmatchpatch.DiffEqual:
|
|
buf.WriteString(html.EscapeString(diffs[i].Text))
|
|
}
|
|
}
|
|
|
|
return template.HTML(buf.Bytes())
|
|
}
|
|
|
|
// GetLine gets a specific line by type (add or del) and file line number
|
|
func (diffSection *DiffSection) GetLine(lineType DiffLineType, idx int) *DiffLine {
|
|
var (
|
|
difference = 0
|
|
addCount = 0
|
|
delCount = 0
|
|
matchDiffLine *DiffLine
|
|
)
|
|
|
|
LOOP:
|
|
for _, diffLine := range diffSection.Lines {
|
|
switch diffLine.Type {
|
|
case DiffLineAdd:
|
|
addCount++
|
|
case DiffLineDel:
|
|
delCount++
|
|
default:
|
|
if matchDiffLine != nil {
|
|
break LOOP
|
|
}
|
|
difference = diffLine.RightIdx - diffLine.LeftIdx
|
|
addCount = 0
|
|
delCount = 0
|
|
}
|
|
|
|
switch lineType {
|
|
case DiffLineDel:
|
|
if diffLine.RightIdx == 0 && diffLine.LeftIdx == idx-difference {
|
|
matchDiffLine = diffLine
|
|
}
|
|
case DiffLineAdd:
|
|
if diffLine.LeftIdx == 0 && diffLine.RightIdx == idx+difference {
|
|
matchDiffLine = diffLine
|
|
}
|
|
}
|
|
}
|
|
|
|
if addCount == delCount {
|
|
return matchDiffLine
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var diffMatchPatch = diffmatchpatch.New()
|
|
|
|
func init() {
|
|
diffMatchPatch.DiffEditCost = 100
|
|
}
|
|
|
|
// GetComputedInlineDiffFor computes inline diff for the given line.
|
|
func (diffSection *DiffSection) GetComputedInlineDiffFor(diffLine *DiffLine) template.HTML {
|
|
if setting.Git.DisableDiffHighlight {
|
|
return template.HTML(html.EscapeString(diffLine.Content[1:]))
|
|
}
|
|
var (
|
|
compareDiffLine *DiffLine
|
|
diff1 string
|
|
diff2 string
|
|
)
|
|
|
|
// try to find equivalent diff line. ignore, otherwise
|
|
switch diffLine.Type {
|
|
case DiffLineAdd:
|
|
compareDiffLine = diffSection.GetLine(DiffLineDel, diffLine.RightIdx)
|
|
if compareDiffLine == nil {
|
|
return template.HTML(html.EscapeString(diffLine.Content))
|
|
}
|
|
diff1 = compareDiffLine.Content
|
|
diff2 = diffLine.Content
|
|
case DiffLineDel:
|
|
compareDiffLine = diffSection.GetLine(DiffLineAdd, diffLine.LeftIdx)
|
|
if compareDiffLine == nil {
|
|
return template.HTML(html.EscapeString(diffLine.Content))
|
|
}
|
|
diff1 = diffLine.Content
|
|
diff2 = compareDiffLine.Content
|
|
default:
|
|
return template.HTML(html.EscapeString(diffLine.Content))
|
|
}
|
|
|
|
diffRecord := diffMatchPatch.DiffMain(diff1[1:], diff2[1:], true)
|
|
diffRecord = diffMatchPatch.DiffCleanupEfficiency(diffRecord)
|
|
|
|
return diffToHTML(diffRecord, diffLine.Type)
|
|
}
|
|
|
|
// DiffFile represents a file diff.
|
|
type DiffFile struct {
|
|
Name string
|
|
OldName string
|
|
Index int
|
|
Addition, Deletion int
|
|
Type DiffFileType
|
|
IsCreated bool
|
|
IsDeleted bool
|
|
IsBin bool
|
|
IsRenamed bool
|
|
IsSubmodule bool
|
|
Sections []*DiffSection
|
|
IsIncomplete bool
|
|
}
|
|
|
|
// GetType returns type of diff file.
|
|
func (diffFile *DiffFile) GetType() int {
|
|
return int(diffFile.Type)
|
|
}
|
|
|
|
// GetHighlightClass returns highlight class for a filename.
|
|
func (diffFile *DiffFile) GetHighlightClass() string {
|
|
return highlight.FileNameToHighlightClass(diffFile.Name)
|
|
}
|
|
|
|
// Diff represents a difference between two git trees.
|
|
type Diff struct {
|
|
TotalAddition, TotalDeletion int
|
|
Files []*DiffFile
|
|
IsIncomplete bool
|
|
}
|
|
|
|
// NumFiles returns number of files changes in a diff.
|
|
func (diff *Diff) NumFiles() int {
|
|
return len(diff.Files)
|
|
}
|
|
|
|
const cmdDiffHead = "diff --git "
|
|
|
|
// ParsePatch builds a Diff object from a io.Reader and some
|
|
// parameters.
|
|
// TODO: move this function to gogits/git-module
|
|
func ParsePatch(maxLines, maxLineCharacteres, maxFiles int, reader io.Reader) (*Diff, error) {
|
|
var (
|
|
diff = &Diff{Files: make([]*DiffFile, 0)}
|
|
|
|
curFile *DiffFile
|
|
curSection = &DiffSection{
|
|
Lines: make([]*DiffLine, 0, 10),
|
|
}
|
|
|
|
leftLine, rightLine int
|
|
lineCount int
|
|
curFileLinesCount int
|
|
)
|
|
|
|
input := bufio.NewReader(reader)
|
|
isEOF := false
|
|
for !isEOF {
|
|
line, err := input.ReadString('\n')
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
isEOF = true
|
|
} else {
|
|
return nil, fmt.Errorf("ReadString: %v", err)
|
|
}
|
|
}
|
|
|
|
if len(line) > 0 && line[len(line)-1] == '\n' {
|
|
// Remove line break.
|
|
line = line[:len(line)-1]
|
|
}
|
|
|
|
if strings.HasPrefix(line, "+++ ") || strings.HasPrefix(line, "--- ") || len(line) == 0 {
|
|
continue
|
|
}
|
|
|
|
curFileLinesCount++
|
|
lineCount++
|
|
|
|
// Diff data too large, we only show the first about maxlines lines
|
|
if curFileLinesCount >= maxLines || len(line) >= maxLineCharacteres {
|
|
curFile.IsIncomplete = true
|
|
}
|
|
|
|
switch {
|
|
case line[0] == ' ':
|
|
diffLine := &DiffLine{Type: DiffLinePlain, Content: line, LeftIdx: leftLine, RightIdx: rightLine}
|
|
leftLine++
|
|
rightLine++
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
continue
|
|
case line[0] == '@':
|
|
curSection = &DiffSection{}
|
|
curFile.Sections = append(curFile.Sections, curSection)
|
|
ss := strings.Split(line, "@@")
|
|
diffLine := &DiffLine{Type: DiffLineSection, Content: line}
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
|
|
// Parse line number.
|
|
ranges := strings.Split(ss[1][1:], " ")
|
|
leftLine, _ = com.StrTo(strings.Split(ranges[0], ",")[0][1:]).Int()
|
|
if len(ranges) > 1 {
|
|
rightLine, _ = com.StrTo(strings.Split(ranges[1], ",")[0]).Int()
|
|
} else {
|
|
log.Warn("Parse line number failed: %v", line)
|
|
rightLine = leftLine
|
|
}
|
|
continue
|
|
case line[0] == '+':
|
|
curFile.Addition++
|
|
diff.TotalAddition++
|
|
diffLine := &DiffLine{Type: DiffLineAdd, Content: line, RightIdx: rightLine}
|
|
rightLine++
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
continue
|
|
case line[0] == '-':
|
|
curFile.Deletion++
|
|
diff.TotalDeletion++
|
|
diffLine := &DiffLine{Type: DiffLineDel, Content: line, LeftIdx: leftLine}
|
|
if leftLine > 0 {
|
|
leftLine++
|
|
}
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
case strings.HasPrefix(line, "Binary"):
|
|
curFile.IsBin = true
|
|
continue
|
|
}
|
|
|
|
// Get new file.
|
|
if strings.HasPrefix(line, cmdDiffHead) {
|
|
middle := -1
|
|
|
|
// Note: In case file name is surrounded by double quotes (it happens only in git-shell).
|
|
// e.g. diff --git "a/xxx" "b/xxx"
|
|
hasQuote := line[len(cmdDiffHead)] == '"'
|
|
if hasQuote {
|
|
middle = strings.Index(line, ` "b/`)
|
|
} else {
|
|
middle = strings.Index(line, " b/")
|
|
}
|
|
|
|
beg := len(cmdDiffHead)
|
|
a := line[beg+2 : middle]
|
|
b := line[middle+3:]
|
|
if hasQuote {
|
|
a = string(git.UnescapeChars([]byte(a[1 : len(a)-1])))
|
|
b = string(git.UnescapeChars([]byte(b[1 : len(b)-1])))
|
|
}
|
|
|
|
curFile = &DiffFile{
|
|
Name: a,
|
|
Index: len(diff.Files) + 1,
|
|
Type: DiffFileChange,
|
|
Sections: make([]*DiffSection, 0, 10),
|
|
}
|
|
diff.Files = append(diff.Files, curFile)
|
|
if len(diff.Files) >= maxFiles {
|
|
diff.IsIncomplete = true
|
|
io.Copy(ioutil.Discard, reader)
|
|
break
|
|
}
|
|
curFileLinesCount = 0
|
|
|
|
// Check file diff type and is submodule.
|
|
for {
|
|
line, err := input.ReadString('\n')
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
isEOF = true
|
|
} else {
|
|
return nil, fmt.Errorf("ReadString: %v", err)
|
|
}
|
|
}
|
|
|
|
switch {
|
|
case strings.HasPrefix(line, "new file"):
|
|
curFile.Type = DiffFileAdd
|
|
curFile.IsCreated = true
|
|
case strings.HasPrefix(line, "deleted"):
|
|
curFile.Type = DiffFileDel
|
|
curFile.IsDeleted = true
|
|
case strings.HasPrefix(line, "index"):
|
|
curFile.Type = DiffFileChange
|
|
case strings.HasPrefix(line, "similarity index 100%"):
|
|
curFile.Type = DiffFileRename
|
|
curFile.IsRenamed = true
|
|
curFile.OldName = curFile.Name
|
|
curFile.Name = b
|
|
}
|
|
if curFile.Type > 0 {
|
|
if strings.HasSuffix(line, " 160000\n") {
|
|
curFile.IsSubmodule = true
|
|
}
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// FIXME: detect encoding while parsing.
|
|
var buf bytes.Buffer
|
|
for _, f := range diff.Files {
|
|
buf.Reset()
|
|
for _, sec := range f.Sections {
|
|
for _, l := range sec.Lines {
|
|
buf.WriteString(l.Content)
|
|
buf.WriteString("\n")
|
|
}
|
|
}
|
|
charsetLabel, err := base.DetectEncoding(buf.Bytes())
|
|
if charsetLabel != "UTF-8" && err == nil {
|
|
encoding, _ := charset.Lookup(charsetLabel)
|
|
if encoding != nil {
|
|
d := encoding.NewDecoder()
|
|
for _, sec := range f.Sections {
|
|
for _, l := range sec.Lines {
|
|
if c, _, err := transform.String(d, l.Content); err == nil {
|
|
l.Content = c
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return diff, nil
|
|
}
|
|
|
|
// GetDiffRange builds a Diff between two commits of a repository.
|
|
// passing the empty string as beforeCommitID returns a diff from the
|
|
// parent commit.
|
|
func GetDiffRange(repoPath, beforeCommitID, afterCommitID string, maxLines, maxLineCharacteres, maxFiles int) (*Diff, error) {
|
|
gitRepo, err := git.OpenRepository(repoPath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
commit, err := gitRepo.GetCommit(afterCommitID)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var cmd *exec.Cmd
|
|
// if "after" commit given
|
|
if len(beforeCommitID) == 0 {
|
|
// First commit of repository.
|
|
if commit.ParentCount() == 0 {
|
|
cmd = exec.Command("git", "show", afterCommitID)
|
|
} else {
|
|
c, _ := commit.Parent(0)
|
|
cmd = exec.Command("git", "diff", "-M", c.ID.String(), afterCommitID)
|
|
}
|
|
} else {
|
|
cmd = exec.Command("git", "diff", "-M", beforeCommitID, afterCommitID)
|
|
}
|
|
cmd.Dir = repoPath
|
|
cmd.Stderr = os.Stderr
|
|
|
|
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)
|
|
}
|
|
|
|
pid := process.Add(fmt.Sprintf("GetDiffRange [repo_path: %s]", repoPath), cmd)
|
|
defer process.Remove(pid)
|
|
|
|
diff, err := ParsePatch(maxLines, maxLineCharacteres, maxFiles, 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
|
|
}
|
|
|
|
// RawDiffType type of a raw diff.
|
|
type RawDiffType string
|
|
|
|
// RawDiffType possible values.
|
|
const (
|
|
RawDiffNormal RawDiffType = "diff"
|
|
RawDiffPatch RawDiffType = "patch"
|
|
)
|
|
|
|
// GetRawDiff dumps diff results of repository in given commit ID to io.Writer.
|
|
// TODO: move this function to gogits/git-module
|
|
func GetRawDiff(repoPath, commitID string, diffType RawDiffType, writer io.Writer) error {
|
|
repo, err := git.OpenRepository(repoPath)
|
|
if err != nil {
|
|
return fmt.Errorf("OpenRepository: %v", err)
|
|
}
|
|
|
|
commit, err := repo.GetCommit(commitID)
|
|
if err != nil {
|
|
return fmt.Errorf("GetCommit: %v", err)
|
|
}
|
|
|
|
var cmd *exec.Cmd
|
|
switch diffType {
|
|
case RawDiffNormal:
|
|
if commit.ParentCount() == 0 {
|
|
cmd = exec.Command("git", "show", commitID)
|
|
} else {
|
|
c, _ := commit.Parent(0)
|
|
cmd = exec.Command("git", "diff", "-M", c.ID.String(), commitID)
|
|
}
|
|
case RawDiffPatch:
|
|
if commit.ParentCount() == 0 {
|
|
cmd = exec.Command("git", "format-patch", "--no-signature", "--stdout", "--root", commitID)
|
|
} else {
|
|
c, _ := commit.Parent(0)
|
|
query := fmt.Sprintf("%s...%s", commitID, c.ID.String())
|
|
cmd = exec.Command("git", "format-patch", "--no-signature", "--stdout", query)
|
|
}
|
|
default:
|
|
return fmt.Errorf("invalid diffType: %s", diffType)
|
|
}
|
|
|
|
stderr := new(bytes.Buffer)
|
|
|
|
cmd.Dir = repoPath
|
|
cmd.Stdout = writer
|
|
cmd.Stderr = stderr
|
|
|
|
if err = cmd.Run(); err != nil {
|
|
return fmt.Errorf("Run: %v - %s", err, stderr)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetDiffCommit builds a Diff representing the given commitID.
|
|
func GetDiffCommit(repoPath, commitID string, maxLines, maxLineCharacteres, maxFiles int) (*Diff, error) {
|
|
return GetDiffRange(repoPath, "", commitID, maxLines, maxLineCharacteres, maxFiles)
|
|
}
|