forgejo-federation/modules/git/repo_compare.go
Mario Lubenka 311ce2d1d0 Compare branches, commits and tags with each other (#6991)
* Supports tags when comparing commits or branches

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Hide headline when only comparing and don't load unused data

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Merges compare logics to allow comparing branches, commits and tags with eachother

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Display branch or tag instead of commit when used for comparing

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Show pull request form after click on button

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Transfers relevant pull.go changes from master to compare.go

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Fixes error when comparing forks against a commit or tag

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Removes console.log from JavaScript file

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Show icon next to commit reference when comparing branch or tag

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Updates css file

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Fixes import order

* Renames template variable

* Update routers/repo/compare.go

Co-Authored-By: zeripath <art27@cantab.net>

* Update from master

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Allow short-shas in compare

* Renames prInfo to compareInfo

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Check PR permissions only if compare is pull request

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Adjusts comment

Signed-off-by: Mario Lubenka <mario.lubenka@googlemail.com>

* Use compareInfo instead of prInfo
2019-06-07 16:29:29 -04:00

106 lines
3.2 KiB
Go

// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2019 The Gitea 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 git
import (
"bytes"
"container/list"
"fmt"
"io"
"strconv"
"strings"
"time"
)
// CompareInfo represents needed information for comparing references.
type CompareInfo struct {
MergeBase string
Commits *list.List
NumFiles int
}
// GetMergeBase checks and returns merge base of two branches.
func (repo *Repository) GetMergeBase(tmpRemote string, base, head string) (string, error) {
if tmpRemote == "" {
tmpRemote = "origin"
}
if tmpRemote != "origin" {
tmpBaseName := "refs/remotes/" + tmpRemote + "/tmp_" + base
// Fetch commit into a temporary branch in order to be able to handle commits and tags
_, err := NewCommand("fetch", tmpRemote, base+":"+tmpBaseName).RunInDir(repo.Path)
if err == nil {
base = tmpBaseName
}
}
stdout, err := NewCommand("merge-base", base, head).RunInDir(repo.Path)
return strings.TrimSpace(stdout), err
}
// GetCompareInfo generates and returns compare information between base and head branches of repositories.
func (repo *Repository) GetCompareInfo(basePath, baseBranch, headBranch string) (_ *CompareInfo, err error) {
var (
remoteBranch string
tmpRemote string
)
// We don't need a temporary remote for same repository.
if repo.Path != basePath {
// Add a temporary remote
tmpRemote = strconv.FormatInt(time.Now().UnixNano(), 10)
if err = repo.AddRemote(tmpRemote, basePath, true); err != nil {
return nil, fmt.Errorf("AddRemote: %v", err)
}
defer repo.RemoveRemote(tmpRemote)
}
compareInfo := new(CompareInfo)
compareInfo.MergeBase, err = repo.GetMergeBase(tmpRemote, baseBranch, headBranch)
if err == nil {
// We have a common base
logs, err := NewCommand("log", compareInfo.MergeBase+"..."+headBranch, prettyLogFormat).RunInDirBytes(repo.Path)
if err != nil {
return nil, err
}
compareInfo.Commits, err = repo.parsePrettyFormatLogToList(logs)
if err != nil {
return nil, fmt.Errorf("parsePrettyFormatLogToList: %v", err)
}
} else {
compareInfo.Commits = list.New()
compareInfo.MergeBase, err = GetFullCommitID(repo.Path, remoteBranch)
if err != nil {
compareInfo.MergeBase = remoteBranch
}
}
// Count number of changed files.
stdout, err := NewCommand("diff", "--name-only", remoteBranch+"..."+headBranch).RunInDir(repo.Path)
if err != nil {
return nil, err
}
compareInfo.NumFiles = len(strings.Split(stdout, "\n")) - 1
return compareInfo, nil
}
// GetPatch generates and returns patch data between given revisions.
func (repo *Repository) GetPatch(base, head string) ([]byte, error) {
return NewCommand("diff", "-p", "--binary", base, head).RunInDirBytes(repo.Path)
}
// GetFormatPatch generates and returns format-patch data between given revisions.
func (repo *Repository) GetFormatPatch(base, head string) (io.Reader, error) {
stdout := new(bytes.Buffer)
stderr := new(bytes.Buffer)
if err := NewCommand("format-patch", "--binary", "--stdout", base+"..."+head).
RunInDirPipeline(repo.Path, stdout, stderr); err != nil {
return nil, concatenateError(err, stderr.String())
}
return stdout, nil
}