mirror of
https://github.com/go-gitea/gitea.git
synced 2024-11-04 08:17:24 -05:00
319 lines
7.1 KiB
Go
319 lines
7.1 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"
|
|
"io"
|
|
"os"
|
|
"os/exec"
|
|
"strings"
|
|
|
|
"github.com/Unknwon/com"
|
|
"golang.org/x/net/html/charset"
|
|
"golang.org/x/text/transform"
|
|
|
|
"github.com/gogits/git-shell"
|
|
|
|
"github.com/gogits/gogs/modules/base"
|
|
"github.com/gogits/gogs/modules/log"
|
|
"github.com/gogits/gogs/modules/process"
|
|
)
|
|
|
|
// Diff line types.
|
|
const (
|
|
DIFF_LINE_PLAIN = iota + 1
|
|
DIFF_LINE_ADD
|
|
DIFF_LINE_DEL
|
|
DIFF_LINE_SECTION
|
|
)
|
|
|
|
const (
|
|
DIFF_FILE_ADD = iota + 1
|
|
DIFF_FILE_CHANGE
|
|
DIFF_FILE_DEL
|
|
DIFF_FILE_RENAME
|
|
)
|
|
|
|
type DiffLine struct {
|
|
LeftIdx int
|
|
RightIdx int
|
|
Type int
|
|
Content string
|
|
}
|
|
|
|
func (d DiffLine) GetType() int {
|
|
return d.Type
|
|
}
|
|
|
|
type DiffSection struct {
|
|
Name string
|
|
Lines []*DiffLine
|
|
}
|
|
|
|
type DiffFile struct {
|
|
Name string
|
|
OldName string
|
|
Index int
|
|
Addition, Deletion int
|
|
Type int
|
|
IsCreated bool
|
|
IsDeleted bool
|
|
IsBin bool
|
|
IsRenamed bool
|
|
Sections []*DiffSection
|
|
}
|
|
|
|
type Diff struct {
|
|
TotalAddition, TotalDeletion int
|
|
Files []*DiffFile
|
|
}
|
|
|
|
func (diff *Diff) NumFiles() int {
|
|
return len(diff.Files)
|
|
}
|
|
|
|
const DIFF_HEAD = "diff --git "
|
|
|
|
func ParsePatch(maxlines 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
|
|
)
|
|
|
|
input := bufio.NewReader(reader)
|
|
isEOF := false
|
|
for {
|
|
if isEOF {
|
|
break
|
|
}
|
|
|
|
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, "--- ") {
|
|
continue
|
|
} else if len(line) == 0 {
|
|
continue
|
|
}
|
|
|
|
lineCount++
|
|
|
|
// Diff data too large, we only show the first about maxlines lines
|
|
if lineCount >= maxlines {
|
|
log.Warn("Diff data too large")
|
|
diff.Files = nil
|
|
return diff, nil
|
|
}
|
|
|
|
switch {
|
|
case line[0] == ' ':
|
|
diffLine := &DiffLine{Type: DIFF_LINE_PLAIN, 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: DIFF_LINE_SECTION, 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: DIFF_LINE_ADD, Content: line, RightIdx: rightLine}
|
|
rightLine++
|
|
curSection.Lines = append(curSection.Lines, diffLine)
|
|
continue
|
|
case line[0] == '-':
|
|
curFile.Deletion++
|
|
diff.TotalDeletion++
|
|
diffLine := &DiffLine{Type: DIFF_LINE_DEL, 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, DIFF_HEAD) {
|
|
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(DIFF_HEAD)] == '"'
|
|
if hasQuote {
|
|
middle = strings.Index(line, ` "b/`)
|
|
} else {
|
|
middle = strings.Index(line, " b/")
|
|
}
|
|
|
|
beg := len(DIFF_HEAD)
|
|
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: DIFF_FILE_CHANGE,
|
|
Sections: make([]*DiffSection, 0, 10),
|
|
}
|
|
diff.Files = append(diff.Files, curFile)
|
|
|
|
// Check file diff type.
|
|
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 = DIFF_FILE_ADD
|
|
curFile.IsCreated = true
|
|
case strings.HasPrefix(line, "deleted"):
|
|
curFile.Type = DIFF_FILE_DEL
|
|
curFile.IsDeleted = true
|
|
case strings.HasPrefix(line, "index"):
|
|
curFile.Type = DIFF_FILE_CHANGE
|
|
case strings.HasPrefix(line, "similarity index 100%"):
|
|
curFile.Type = DIFF_FILE_RENAME
|
|
curFile.IsRenamed = true
|
|
curFile.OldName = curFile.Name
|
|
curFile.Name = b
|
|
}
|
|
if curFile.Type > 0 {
|
|
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 := base.DetectEncoding(buf.Bytes())
|
|
if charsetLabel != "UTF-8" {
|
|
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
|
|
}
|
|
|
|
func GetDiffRange(repoPath, beforeCommitID string, afterCommitID string, maxlines int) (*Diff, error) {
|
|
repo, err := git.OpenRepository(repoPath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
commit, err := repo.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 (%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
|
|
}
|
|
|
|
func GetDiffCommit(repoPath, commitId string, maxlines int) (*Diff, error) {
|
|
return GetDiffRange(repoPath, "", commitId, maxlines)
|
|
}
|