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lazygit/pkg/commands/commit_list_builder.go

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package commands
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/fatih/color"
"github.com/jesseduffield/lazygit/pkg/i18n"
"github.com/jesseduffield/lazygit/pkg/utils"
"github.com/sirupsen/logrus"
)
// context:
// here we get the commits from git log but format them to show whether they're
// unpushed/pushed/merged into the base branch or not, or if they're yet to
// be processed as part of a rebase (these won't appear in git log but we
// grab them from the rebase-related files in the .git directory to show them
// 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
// CommitListBuilder returns a list of Branch objects for the current repo
type CommitListBuilder struct {
Log *logrus.Entry
GitCommand *GitCommand
OSCommand *OSCommand
Tr *i18n.Localizer
CherryPickedCommits []*Commit
DiffEntries []*Commit
}
// NewCommitListBuilder builds a new commit list builder
func NewCommitListBuilder(log *logrus.Entry, gitCommand *GitCommand, osCommand *OSCommand, tr *i18n.Localizer, cherryPickedCommits []*Commit, diffEntries []*Commit) (*CommitListBuilder, error) {
return &CommitListBuilder{
Log: log,
GitCommand: gitCommand,
OSCommand: osCommand,
Tr: tr,
CherryPickedCommits: cherryPickedCommits,
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DiffEntries: diffEntries,
}, nil
}
// GetCommits obtains the commits of the current branch
func (c *CommitListBuilder) GetCommits() ([]*Commit, error) {
commits := []*Commit{}
var rebasingCommits []*Commit
rebaseMode, err := c.GitCommand.RebaseMode()
if err != nil {
return nil, err
}
if rebaseMode != "" {
// here we want to also prepend the commits that we're in the process of rebasing
rebasingCommits, err = c.getRebasingCommits(rebaseMode)
if err != nil {
return nil, err
}
if len(rebasingCommits) > 0 {
commits = append(commits, rebasingCommits...)
}
}
unpushedCommits := c.getUnpushedCommits()
log := c.getLog()
// now we can split it up and turn it into commits
for _, line := range utils.SplitLines(log) {
splitLine := strings.Split(line, " ")
sha := splitLine[0]
_, unpushed := unpushedCommits[sha]
status := map[bool]string{true: "unpushed", false: "pushed"}[unpushed]
commits = append(commits, &Commit{
Sha: sha,
Name: strings.Join(splitLine[1:], " "),
Status: status,
DisplayString: strings.Join(splitLine, " "),
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// TODO: add tags here
})
}
if rebaseMode != "" {
currentCommit := commits[len(rebasingCommits)]
blue := color.New(color.FgYellow)
youAreHere := blue.Sprintf("<-- %s ---", c.Tr.SLocalize("YouAreHere"))
currentCommit.Name = fmt.Sprintf("%s %s", youAreHere, currentCommit.Name)
}
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commits, err = c.setCommitMergedStatuses(commits)
if err != nil {
return nil, err
}
commits, err = c.setCommitCherryPickStatuses(commits)
if err != nil {
return nil, err
}
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for _, commit := range commits {
for _, entry := range c.DiffEntries {
if entry.Sha == commit.Sha {
commit.Status = "selected"
}
}
}
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return commits, nil
}
// getRebasingCommits obtains the commits that we're in the process of rebasing
func (c *CommitListBuilder) getRebasingCommits(rebaseMode string) ([]*Commit, error) {
switch rebaseMode {
case "normal":
return c.getNormalRebasingCommits()
case "interactive":
return c.getInteractiveRebasingCommits()
default:
return nil, nil
}
}
func (c *CommitListBuilder) getNormalRebasingCommits() ([]*Commit, error) {
rewrittenCount := 0
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bytesContent, err := ioutil.ReadFile(fmt.Sprintf("%s/rebase-apply/rewritten", c.GitCommand.DotGitDir))
if err == nil {
content := string(bytesContent)
rewrittenCount = len(strings.Split(content, "\n"))
}
// we know we're rebasing, so lets get all the files whose names have numbers
commits := []*Commit{}
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err = filepath.Walk(fmt.Sprintf("%s/rebase-apply", c.GitCommand.DotGitDir), func(path string, f os.FileInfo, err error) error {
if rewrittenCount > 0 {
rewrittenCount--
return nil
}
if err != nil {
return err
}
re := regexp.MustCompile(`^\d+$`)
if !re.MatchString(f.Name()) {
return nil
}
bytesContent, err := ioutil.ReadFile(path)
if err != nil {
return err
}
content := string(bytesContent)
commit, err := c.commitFromPatch(content)
if err != nil {
return err
}
commits = append([]*Commit{commit}, commits...)
return nil
})
if err != nil {
return nil, err
}
return commits, nil
}
// git-rebase-todo example:
// pick ac446ae94ee560bdb8d1d057278657b251aaef17 ac446ae
// pick afb893148791a2fbd8091aeb81deba4930c73031 afb8931
// git-rebase-todo.backup example:
// pick 49cbba374296938ea86bbd4bf4fee2f6ba5cccf6 third commit on master
// pick ac446ae94ee560bdb8d1d057278657b251aaef17 blah commit on master
// pick afb893148791a2fbd8091aeb81deba4930c73031 fourth commit on master
// getInteractiveRebasingCommits takes our git-rebase-todo and our git-rebase-todo.backup files
// and extracts out the sha and names of commits that we still have to go
// in the rebase:
func (c *CommitListBuilder) getInteractiveRebasingCommits() ([]*Commit, error) {
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bytesContent, err := ioutil.ReadFile(fmt.Sprintf("%s/rebase-merge/git-rebase-todo", c.GitCommand.DotGitDir))
if err != nil {
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c.Log.Info(fmt.Sprintf("error occurred reading git-rebase-todo: %s", err.Error()))
// we assume an error means the file doesn't exist so we just return
return nil, nil
}
commits := []*Commit{}
lines := strings.Split(string(bytesContent), "\n")
for _, line := range lines {
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if line == "" || line == "noop" {
return commits, nil
}
splitLine := strings.Split(line, " ")
commits = append([]*Commit{{
Sha: splitLine[1][0:7],
Name: strings.Join(splitLine[2:], " "),
Status: "rebasing",
Action: splitLine[0],
}}, commits...)
}
return nil, nil
}
// assuming the file starts like this:
// From e93d4193e6dd45ca9cf3a5a273d7ba6cd8b8fb20 Mon Sep 17 00:00:00 2001
// From: Lazygit Tester <test@example.com>
// Date: Wed, 5 Dec 2018 21:03:23 +1100
// Subject: second commit on master
func (c *CommitListBuilder) commitFromPatch(content string) (*Commit, error) {
lines := strings.Split(content, "\n")
sha := strings.Split(lines[0], " ")[1][0:7]
name := strings.TrimPrefix(lines[3], "Subject: ")
return &Commit{
Sha: sha,
Name: name,
Status: "rebasing",
}, nil
}
func (c *CommitListBuilder) setCommitMergedStatuses(commits []*Commit) ([]*Commit, error) {
ancestor, err := c.getMergeBase()
if err != nil {
return nil, err
}
if ancestor == "" {
return commits, nil
}
passedAncestor := false
for i, commit := range commits {
if strings.HasPrefix(ancestor, commit.Sha) {
passedAncestor = true
}
if commit.Status != "pushed" {
continue
}
if passedAncestor {
commits[i].Status = "merged"
}
}
return commits, nil
}
func (c *CommitListBuilder) setCommitCherryPickStatuses(commits []*Commit) ([]*Commit, error) {
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for _, commit := range commits {
for _, cherryPickedCommit := range c.CherryPickedCommits {
if commit.Sha == cherryPickedCommit.Sha {
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commit.Copied = true
}
}
}
return commits, nil
}
func (c *CommitListBuilder) getMergeBase() (string, error) {
currentBranch, err := c.GitCommand.CurrentBranchName()
if err != nil {
return "", err
}
baseBranch := "master"
if strings.HasPrefix(currentBranch, "feature/") {
baseBranch = "develop"
}
// swallowing error because it's not a big deal; probably because there are no commits yet
output, _ := c.OSCommand.RunCommandWithOutput("git merge-base HEAD %s", baseBranch)
return output, nil
}
// getUnpushedCommits Returns the sha's of the commits that have not yet been pushed
// to the remote branch of the current branch, a map is returned to ease look up
func (c *CommitListBuilder) getUnpushedCommits() map[string]bool {
pushables := map[string]bool{}
o, err := c.OSCommand.RunCommandWithOutput("git rev-list @{u}..HEAD --abbrev-commit")
if err != nil {
return pushables
}
for _, p := range utils.SplitLines(o) {
pushables[p] = true
}
return pushables
}
// getLog gets the git log (currently limited to 30 commits for performance
// until we work out lazy loading
func (c *CommitListBuilder) getLog() string {
// currently limiting to 30 for performance reasons
// TODO: add lazyloading when you scroll down
result, err := c.OSCommand.RunCommandWithOutput("git log --oneline -30")
if err != nil {
// assume if there is an error there are no commits yet for this branch
return ""
}
return result
}