Merge loaders package into git_commands package

pkg/commands/git_commands/reflog_commit_loader.go

@@ -0,0 +1,77 @@
+package git_commands
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/commands/models"
+	"github.com/jesseduffield/lazygit/pkg/commands/oscommands"
+	"github.com/jesseduffield/lazygit/pkg/common"
+)
+
+type ReflogCommitLoader struct {
+	*common.Common
+	cmd oscommands.ICmdObjBuilder
+}
+
+func NewReflogCommitLoader(common *common.Common, cmd oscommands.ICmdObjBuilder) *ReflogCommitLoader {
+	return &ReflogCommitLoader{
+		Common: common,
+		cmd:    cmd,
+	}
+}
+
+// GetReflogCommits only returns the new reflog commits since the given lastReflogCommit
+// if none is passed (i.e. it's value is nil) then we get all the reflog commits
+func (self *ReflogCommitLoader) GetReflogCommits(lastReflogCommit *models.Commit, filterPath string) ([]*models.Commit, bool, error) {
+	commits := make([]*models.Commit, 0)
+
+	filterPathArg := ""
+	if filterPath != "" {
+		filterPathArg = fmt.Sprintf(" --follow -- %s", self.cmd.Quote(filterPath))
+	}
+
+	cmdObj := self.cmd.New(fmt.Sprintf(`git -c log.showSignature=false log -g --abbrev=40 --format="%s"%s`, "%h%x00%ct%x00%gs%x00%p", filterPathArg)).DontLog()
+	onlyObtainedNewReflogCommits := false
+	err := cmdObj.RunAndProcessLines(func(line string) (bool, error) {
+		fields := strings.SplitN(line, "\x00", 4)
+		if len(fields) <= 3 {
+			return false, nil
+		}
+
+		unixTimestamp, _ := strconv.Atoi(fields[1])
+
+		parentHashes := fields[3]
+		parents := []string{}
+		if len(parentHashes) > 0 {
+			parents = strings.Split(parentHashes, " ")
+		}
+
+		commit := &models.Commit{
+			Sha:           fields[0],
+			Name:          fields[2],
+			UnixTimestamp: int64(unixTimestamp),
+			Status:        "reflog",
+			Parents:       parents,
+		}
+
+		// note that the unix timestamp here is the timestamp of the COMMIT, not the reflog entry itself,
+		// so two consecutive reflog entries may have both the same SHA and therefore same timestamp.
+		// We use the reflog message to disambiguate, and fingers crossed that we never see the same of those
+		// twice in a row. Reason being that it would mean we'd be erroneously exiting early.
+		if lastReflogCommit != nil && commit.Sha == lastReflogCommit.Sha && commit.UnixTimestamp == lastReflogCommit.UnixTimestamp && commit.Name == lastReflogCommit.Name {
+			onlyObtainedNewReflogCommits = true
+			// after this point we already have these reflogs loaded so we'll simply return the new ones
+			return true, nil
+		}
+
+		commits = append(commits, commit)
+		return false, nil
+	})
+	if err != nil {
+		return nil, false, err
+	}
+
+	return commits, onlyObtainedNewReflogCommits, nil
+}