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package git
import (
"fmt"
"strconv"
"strings"
"time"
)
func CompareDiff(base, head, repoDir string) (string, error) {
out, err := gitCmd(repoDir, "diff", base+"..."+head)
if err != nil {
return "", err
}
return string(out), nil
}
func CompareCommits(base, head Ref, repoDir string) ([]Commit, error) {
format := []string{"%H", "%h", "%s", "%b", "%an", "%ae", "%ad", "%cn", "%ce", "%cd", "%P", "%D"}
out, err := gitCmd(repoDir,
"log",
"--date=unix",
"--pretty=format:"+strings.Join(format, "\x1F"),
"-z",
base.String()+".."+head.String(),
)
if err != nil {
return nil, err
}
lines := strings.Split(string(out), "\x00")
commits := make([]Commit, 0, len(lines))
for _, line := range lines {
if line == "" {
continue
}
parts := strings.Split(line, "\x1F")
if len(parts) != len(format) {
return nil, fmt.Errorf("unexpected commit format: %s", line)
}
full, short, subject, body, author, email, date :=
parts[0], parts[1], parts[2], parts[3], parts[4], parts[5], parts[6]
committerName, committerEmail, committerDate, parents, refs :=
parts[7], parts[8], parts[9], parts[10], parts[11]
timestampInt, err := strconv.Atoi(date)
if err != nil {
return nil, fmt.Errorf("failed to parse commit date: %w", err)
}
committerTimestampInt, err := strconv.Atoi(committerDate)
if err != nil {
return nil, fmt.Errorf("failed to parse committer date: %w", err)
}
commits = append(commits, Commit{
Hash: full,
ShortHash: short,
Subject: subject,
Body: body,
Author: author,
Email: email,
Date: time.Unix(int64(timestampInt), 0),
CommitterName: committerName,
CommitterEmail: committerEmail,
CommitterDate: time.Unix(int64(committerTimestampInt), 0),
Parents: strings.Fields(parents),
RefNames: parseRefNames(refs),
})
}
return commits, nil
}
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