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package git_commands
import (
"fmt"
"regexp"
"strconv"
"strings"
"github.com/jesseduffield/generics/set"
"github.com/jesseduffield/go-git/v5/config"
"github.com/jesseduffield/lazygit/pkg/commands/models"
"github.com/jesseduffield/lazygit/pkg/commands/oscommands"
"github.com/jesseduffield/lazygit/pkg/common"
"github.com/jesseduffield/lazygit/pkg/utils"
"github.com/samber/lo"
"golang.org/x/exp/slices"
)
// context:
// we want to only show 'safe' branches (ones that haven't e.g. been deleted)
// which `git branch -a` gives us, but we also want the recency data that
// git reflog gives us.
// So we get the HEAD, then append get the reflog branches that intersect with
// our safe branches, then add the remaining safe branches, ensuring uniqueness
// along the way
// if we find out we need to use one of these functions in the git.go file, we
// can just pull them out of here and put them there and then call them from in here
type BranchLoaderConfigCommands interface {
Branches() (map[string]*config.Branch, error)
}
type BranchInfo struct {
RefName string
DisplayName string // e.g. '(HEAD detached at 123asdf)'
DetachedHead bool
}
// BranchLoader returns a list of Branch objects for the current repo
type BranchLoader struct {
*common.Common
*GitCommon
cmd oscommands.ICmdObjBuilder
getCurrentBranchInfo func() (BranchInfo, error)
config BranchLoaderConfigCommands
}
func NewBranchLoader(
cmn *common.Common,
gitCommon *GitCommon,
cmd oscommands.ICmdObjBuilder,
getCurrentBranchInfo func() (BranchInfo, error),
config BranchLoaderConfigCommands,
) *BranchLoader {
return &BranchLoader{
Common: cmn,
GitCommon: gitCommon,
cmd: cmd,
getCurrentBranchInfo: getCurrentBranchInfo,
config: config,
}
}
// Load the list of branches for the current repo
func (self *BranchLoader) Load(reflogCommits []*models.Commit) ([]*models.Branch, error) {
branches := self.obtainBranches(self.version.IsAtLeast(2, 22, 0))
if self.AppState.LocalBranchSortOrder == "recency" {
reflogBranches := self.obtainReflogBranches(reflogCommits)
// loop through reflog branches. If there is a match, merge them, then remove it from the branches and keep it in the reflog branches
branchesWithRecency := make([]*models.Branch, 0)
outer:
for _, reflogBranch := range reflogBranches {
for j, branch := range branches {
if branch.Head {
continue
}
if strings.EqualFold(reflogBranch.Name, branch.Name) {
branch.Recency = reflogBranch.Recency
branchesWithRecency = append(branchesWithRecency, branch)
branches = utils.Remove(branches, j)
continue outer
}
}
}
// Sort branches that don't have a recency value alphabetically
// (we're really doing this for the sake of deterministic behaviour across git versions)
slices.SortFunc(branches, func(a *models.Branch, b *models.Branch) bool {
return a.Name < b.Name
})
branches = utils.Prepend(branches, branchesWithRecency...)
}
foundHead := false
for i, branch := range branches {
if branch.Head {
foundHead = true
branch.Recency = " *"
branches = utils.Move(branches, i, 0)
break
}
}
if !foundHead {
info, err := self.getCurrentBranchInfo()
if err != nil {
return nil, err
}
branches = utils.Prepend(branches, &models.Branch{Name: info.RefName, DisplayName: info.DisplayName, Head: true, DetachedHead: info.DetachedHead, Recency: " *"})
}
configBranches, err := self.config.Branches()
if err != nil {
return nil, err
}
for _, branch := range branches {
match := configBranches[branch.Name]
if match != nil {
branch.UpstreamRemote = match.Remote
branch.UpstreamBranch = match.Merge.Short()
}
}
return branches, nil
}
func (self *BranchLoader) obtainBranches(canUsePushTrack bool) []*models.Branch {
output, err := self.getRawBranches()
if err != nil {
panic(err)
}
trimmedOutput := strings.TrimSpace(output)
outputLines := strings.Split(trimmedOutput, "\n")
return lo.FilterMap(outputLines, func(line string, _ int) (*models.Branch, bool) {
if line == "" {
return nil, false
}
split := strings.Split(line, "\x00")
if len(split) != len(branchFields) {
// Ignore line if it isn't separated into the expected number of parts
// This is probably a warning message, for more info see:
// https://github.com/jesseduffield/lazygit/issues/1385#issuecomment-885580439
return nil, false
}
storeCommitDateAsRecency := self.AppState.LocalBranchSortOrder != "recency"
return obtainBranch(split, storeCommitDateAsRecency, canUsePushTrack), true
})
}
func (self *BranchLoader) getRawBranches() (string, error) {
format := strings.Join(
lo.Map(branchFields, func(thing string, _ int) string {
return "%(" + thing + ")"
}),
"%00",
)
var sortOrder string
switch strings.ToLower(self.AppState.LocalBranchSortOrder) {
case "recency", "date":
sortOrder = "-committerdate"
case "alphabetical":
sortOrder = "refname"
default:
sortOrder = "refname"
}
cmdArgs := NewGitCmd("for-each-ref").
Arg(fmt.Sprintf("--sort=%s", sortOrder)).
Arg(fmt.Sprintf("--format=%s", format)).
Arg("refs/heads").
ToArgv()
return self.cmd.New(cmdArgs).DontLog().RunWithOutput()
}
var branchFields = []string{
"HEAD",
"refname:short",
"upstream:short",
"upstream:track",
"push:track",
"subject",
"objectname",
"committerdate:unix",
}
// Obtain branch information from parsed line output of getRawBranches()
func obtainBranch(split []string, storeCommitDateAsRecency bool, canUsePushTrack bool) *models.Branch {
headMarker := split[0]
fullName := split[1]
upstreamName := split[2]
track := split[3]
pushTrack := split[4]
subject := split[5]
commitHash := split[6]
commitDate := split[7]
name := strings.TrimPrefix(fullName, "heads/")
aheadForPull, behindForPull, gone := parseUpstreamInfo(upstreamName, track)
var aheadForPush, behindForPush string
if canUsePushTrack {
aheadForPush, behindForPush, _ = parseUpstreamInfo(upstreamName, pushTrack)
} else {
aheadForPush, behindForPush = aheadForPull, behindForPull
}
recency := ""
if storeCommitDateAsRecency {
if unixTimestamp, err := strconv.ParseInt(commitDate, 10, 64); err == nil {
recency = utils.UnixToTimeAgo(unixTimestamp)
}
}
return &models.Branch{
Name: name,
Recency: recency,
AheadForPull: aheadForPull,
BehindForPull: behindForPull,
AheadForPush: aheadForPush,
BehindForPush:
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