Add omitempty to stats and run get change info for changes and types in parallel (#2105)

app/api/controller/util.go

@@ -94,13 +94,6 @@ func MapCommit(c *git.Commit) (*types.Commit, error) {
 		return nil, fmt.Errorf("failed to map committer: %w", err)
 	}
 
-	var insertions int64
-	var deletions int64
-	for _, stat := range c.FileStats {
-		insertions += stat.Insertions
-		deletions += stat.Deletions
-	}
-
 	parentSHAs := make([]string, len(c.ParentSHAs))
 	for i, sha := range c.ParentSHAs {
 		parentSHAs[i] = sha.String()
@@ -113,15 +106,31 @@ func MapCommit(c *git.Commit) (*types.Commit, error) {
 			Message:    c.Message,
 			Author:     *author,
 			Committer:  *committer,
-		Stats: types.CommitStats{
+			Stats:      mapStats(c),
+		},
+		nil
+}
+
+func mapStats(c *git.Commit) *types.CommitStats {
+	if len(c.FileStats) == 0 {
+		return nil
+	}
+
+	var insertions int64
+	var deletions int64
+	for _, stat := range c.FileStats {
+		insertions += stat.Insertions
+		deletions += stat.Deletions
+	}
+
+	return &types.CommitStats{
 		Total: types.ChangeStats{
 			Insertions: insertions,
 			Deletions:  deletions,
 			Changes:    insertions + deletions,
 		},
 		Files: mapFileStats(c),
-		},
-	}, nil
+	}
 }
 
 func mapFileStats(c *git.Commit) []types.CommitFileStats {

git/api/commit.go

@@ -31,6 +31,7 @@ import (
 	"github.com/harness/gitness/git/sha"
 
 	"github.com/rs/zerolog/log"
+	"golang.org/x/sync/errgroup"
 )
 
 // CommitGPGSignature represents a git commit signature part.
@@ -255,15 +256,28 @@ func getCommitFileStats(
 	repoPath string,
 	sha sha.SHA,
 ) ([]CommitFileStats, error) {
+	g, ctx := errgroup.WithContext(ctx)
+	var changeInfoChanges map[string]changeInfoChange
 	var changeInfoTypes map[string]changeInfoType
-	changeInfoTypes, err := getChangeInfoTypes(ctx, repoPath, sha)
-	if err != nil {
+
+	g.Go(func() error {
+		var err error
+		changeInfoChanges, err = getChangeInfoChanges(ctx, repoPath, sha)
+		return err
+	})
+
+	g.Go(func() error {
+		var err error
+		changeInfoTypes, err = getChangeInfoTypes(ctx, repoPath, sha)
+		return err
+	})
+
+	if err := g.Wait(); err != nil {
 		return nil, fmt.Errorf("failed to get change infos: %w", err)
 	}
 
-	changeInfoChanges, err := getChangeInfoChanges(ctx, repoPath, sha)
-	if err != nil {
-		return []CommitFileStats{}, fmt.Errorf("failed to get change infos: %w", err)
+	if len(changeInfoTypes) == 0 {
+		return []CommitFileStats{}, nil
 	}
 
 	fileStats := make([]CommitFileStats, len(changeInfoChanges))

types/git.go

@@ -83,7 +83,7 @@ type Commit struct {
 	Message    string       `json:"message"`
 	Author     Signature    `json:"author"`
 	Committer  Signature    `json:"committer"`
-	Stats      CommitStats `json:"stats,omitempty"`
+	Stats      *CommitStats `json:"stats,omitempty"`
 }
 
 type Signature struct {