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package loaders
import (
"regexp"
"strings"
"github.com/jesseduffield/go-git/v5/config"
"github.com/jesseduffield/lazygit/pkg/commands/models"
"github.com/jesseduffield/lazygit/pkg/common"
"github.com/jesseduffield/lazygit/pkg/utils"
)
// 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)
}
// BranchLoader returns a list of Branch objects for the current repo
type BranchLoader struct {
*common.Common
getRawBranches func() (string, error)
getCurrentBranchName func() (string, string, error)
config BranchLoaderConfigCommands
}
func NewBranchLoader(
cmn *common.Common,
getRawBranches func() (string, error),
getCurrentBranchName func() (string, string, error),
config BranchLoaderConfigCommands,
) *BranchLoader {
return &BranchLoader{
Common: cmn,
getRawBranches: getRawBranches,
getCurrentBranchName: getCurrentBranchName,
config: config,
}
}
// Load the list of branches for the current repo
func (self *BranchLoader) Load(reflogCommits []*models.Commit) ([]*models.Branch, error) {
branches := self.obtainBranches()
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 = append(branches[0:j], branches[j+1:]...)
continue outer
}
}
}
branches = append(branchesWithRecency, branches...)
foundHead := false
for i, branch := range branches {
if branch.Head {
foundHead = true
branch.Recency = " *"
branches = append(branches[0:i], branches[i+1:]...)
branches = append([]*models.Branch{branch}, branches...)
break
}
}
if !foundHead {
currentBranchName, currentBranchDisplayName, err := self.getCurrentBranchName()
if err != nil {
return nil, err
}
branches = append([]*models.Branch{{Name: currentBranchName, DisplayName: currentBranchDisplayName, Head: true, Recency: " *"}}, branches...)
}
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() []*models.Branch {
output, err := self.getRawBranches()
if err != nil {
panic(err)
}
trimmedOutput := strings.TrimSpace(output)
outputLines := strings.Split(trimmedOutput, "\n")
branches := make([]*models.Branch, 0, len(outputLines))
for _, line := range outputLines {
if line == "" {
continue
}
split := strings.Split(line, SEPARATION_CHAR)
if len(split) != 4 {
// Ignore line if it isn't separated into 4 parts
// This is probably a warning message, for more info see:
// https://github.com/jesseduffield/lazygit/issues/1385#issuecomment-885580439
continue
}
name := strings.TrimPrefix(split[1], "heads/")
branch := &models.Branch{
Name: name,
Pullables: "?",
Pushables: "?",
Head: split[0] == "*",
}
upstreamName := split[2]
if upstreamName == "" {
// if we're here then it means we do not have a local version of the remote.
// The branch might still be tracking a remote though, we just don't know
// how many commits ahead/behind it is
branches = append(branches, branch)
continue
}
track := split[3]
re := regexp.MustCompile(`ahead (\d+)`)
match := re.FindStringSubmatch(track)
if len(match) > 1 {
branch.Pushables = match[1]
} else {
branch.Pushables = "0"
}
re = regexp.MustCompile(`behind (\d+)`)
match = re.FindStringSubmatch(track)
if len(match) > 1 {
branch.Pullables = match[1]
} else {
branch.Pullables = "0"
}
branches = append(branches, branch)
}
return branches
}
// TODO: only look at the new reflog commits, and otherwise store the recencies in
// int form against the branch to recalculate the time ago
func (self *BranchLoader) obtainReflogBranches(reflogCommits []*models.Commit) []*models.Branch {
foundBranchesMap := map[string]bool{}
re := regexp.MustCompile(`checkout: moving from ([\S]+) to ([\S]+)`)
reflogBranches := make([]*models.Branch, 0, len(reflogCommits))
for _, commit := range reflogCommits {
if match := re.FindStringSubmatch(commit.Name); len(match) == 3 {
recency := utils.UnixToTimeAgo(commit.UnixTimestamp)
for _, branchName := range match[1:] {
if !foundBranchesMap[branchName] {
foundBranchesMap[branchName] = true
reflogBranches = append(reflogBranches, &models.Branch{
Recency: recency,
Name: branchName,
})
}
}
}
}
return reflogBranches
}
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