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package main
import (
"fmt"
"io/fs"
"os"
"os/exec"
"strconv"
"strings"
"time"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/martinlehoux/kagamigo/kcore"
)
type RecordExtractor interface {
Extract(keyword string, path string, line int) (Record, error)
}
type StatRecordExtractor struct {
fileInfo fs.FileInfo
}
func NewStatRecordExtractor(absolutePath string) *StatRecordExtractor {
fileInfo, err := os.Stat(absolutePath)
kcore.Expect(err, "Error getting file info")
return &StatRecordExtractor{
fileInfo: fileInfo,
}
}
func (re *StatRecordExtractor) Extract(keyword string, path string, line int) (Record, error) {
return Record{
keyword: keyword,
path: path,
line: line,
date: re.fileInfo.ModTime(),
}, nil
}
type GoGitRecordExtractor struct {
blame *git.BlameResult
}
func NewGoGitRecordExtractor(head *object.Commit, path string) *GoGitRecordExtractor {
blame, err := git.Blame(head, path)
if err == object.ErrFileNotFound {
return nil
}
return &GoGitRecordExtractor{
blame: blame,
}
}
func (re *GoGitRecordExtractor) Extract(keyword string, path string, line int) (Record, error) {
record := Record{
keyword: keyword,
path: path,
line: line,
}
record.date = re.blame.Lines[line-1].Date
return record, nil
}
type GitRecordExtractor struct {
repoPath string
}
func (re *GitRecordExtractor) Extract(keyword string, path string, line int) (Record, error) {
record := Record{
keyword: keyword,
path: path,
line: line,
}
gitArgs := []string{"blame", "-L", fmt.Sprintf("%d,%d", line, line), "--porcelain", path}
cmd := exec.Command("git", gitArgs...) // #nosec G204
cmd.Dir = re.repoPath
output, err := cmd.Output()
if err != nil {
return record, kcore.Wrap(err, fmt.Sprintf("Error running: git %s", strings.Join(gitArgs, " ")))
}
for _, blameLine := range strings.Split(string(output), "\n") {
if strings.HasPrefix(blameLine, "author-time ") {
timestamp, err := strconv.ParseInt(strings.TrimPrefix(blameLine, "author-time "), 10, 64)
kcore.Expect(err, "Error parsing timestamp")
record.date = time.Unix(timestamp, 0)
return record, nil
}
}
kcore.Assert(false, "No date found in git blame output")
return Record{}, nil
}
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