功能补齐、查看git提交历史

internal/infra/git/log.go

@@ -0,0 +1,61 @@
+package git
+
+import (
+	"context"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Commit 表示一条 git log 记录。
+type Commit struct {
+	Hash    string
+	Author  string
+	Email   string
+	Date    time.Time
+	Subject string
+}
+
+// Log 返回 dir 的最近 n 条提交历史。n <= 0 时默认 50 条。
+func (r *DefaultRunner) Log(ctx context.Context, dir string, n int) ([]Commit, error) {
+	ctx, cancel := withCtx(ctx, r.cfg.OpsTimeout)
+	defer cancel()
+	if n <= 0 {
+		n = 50
+	}
+	out, _, err := r.exec(ctx, dir, nil, "log", "--format=%H%x00%an%x00%ae%x00%aI%x00%s%x00", "-n", strconv.Itoa(n))
+	if err != nil {
+		return nil, err
+	}
+	return parseLog(out), nil
+}
+
+func parseLog(buf []byte) []Commit {
+	if len(buf) == 0 {
+		return nil
+	}
+	parts := strings.Split(string(buf), "\x00")
+	var commits []Commit
+	// parts 以空字符串结尾（因为 format 最后有 %x00），所以每 5 个字段为一组。
+	for i := 0; i+4 < len(parts); i += 5 {
+		hash := parts[i]
+		if hash == "" {
+			continue
+		}
+		author := parts[i+1]
+		email := parts[i+2]
+		dateStr := parts[i+3]
+		subject := parts[i+4]
+
+		date, _ := time.Parse(time.RFC3339, dateStr)
+
+		commits = append(commits, Commit{
+			Hash:    hash,
+			Author:  author,
+			Email:   email,
+			Date:    date,
+			Subject: subject,
+		})
+	}
+	return commits
+}