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package git
import (
"bytes"
"fmt"
"html/template"
"net/url"
"os"
"os/exec"
"path/filepath"
"repobrowser/internal/config"
"repobrowser/internal/models"
"strings"
chromalib "github.com/alecthomas/chroma/v2"
chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
"github.com/alecthomas/chroma/v2/lexers"
"github.com/alecthomas/chroma/v2/styles"
)
func gitAt(path string, args ...string) (string, error) {
cmd := exec.Command("git", append([]string{"-C", path}, args...)...)
out, err := cmd.Output()
return strings.TrimSpace(string(out)), err
}
func gitCmdStr(args ...string) string { return strings.Join(args, " ") }
func ListRepos(cfg config.RepositoryBrowserConfiguration) []models.RepoInfo {
entries, err := os.ReadDir(cfg.Root)
if err != nil {
return nil
}
var repos []models.RepoInfo
for _, e := range entries {
if !e.IsDir() {
continue
}
p := filepath.Join(cfg.Root, e.Name())
// Must be a git repo
if _, err := os.Stat(filepath.Join(p, ".git")); err != nil {
// Also accept bare repos
if _, err2 := os.Stat(filepath.Join(p, "HEAD")); err2 != nil {
continue
}
}
branch, _ := gitAt(p, "rev-parse", "--abbrev-ref", "HEAD")
if branch == "" {
branch = "main"
}
last, _ := gitAt(p, "log", "-1", "--pretty=format:%ar", branch)
desc := ""
if d, err := os.ReadFile(filepath.Join(p, "description")); err == nil {
s := strings.TrimSpace(string(d))
if !strings.HasPrefix(s, "Unnamed repository") {
desc = s
}
}
repos = append(repos, models.RepoInfo{
Name: e.Name(),
Description: desc,
LastCommit: last,
Branch: branch,
})
}
return repos
}
func ListBranches(rp string) ([]string, string) {
out, err := gitAt(rp, "branch", "--format=%(refname:short)")
if err != nil {
return nil, "HEAD"
}
cur, _ := gitAt(rp, "rev-parse", "--abbrev-ref", "HEAD")
var branches []string
for _, b := range strings.Split(out, "\n") {
b = strings.TrimSpace(b)
if b != "" {
branches = append(branches, b)
}
}
if cur == "" {
cur = "HEAD"
}
return branches, cur
}
func BuildBranchLinks(all []string, activeBr, repoName, tab string) []models.BranchLink {
var links []models.BranchLink
for _, b := range all {
var u string
switch tab {
case "files":
u = fmt.Sprintf("/%s/?branch=%s", repoName, url.QueryEscape(b))
default:
u = fmt.Sprintf("/%s/%s?branch=%s", repoName, tab, url.QueryEscape(b))
}
links = append(links, models.BranchLink{Name: b, URL: u, Active: b == activeBr})
}
return links
}
func ListFiles(rp, branch string) ([]models.FileEntry, string, error) {
args := []string{"ls-tree", "-r", "--name-only", branch}
out, err := gitAt(rp, args...)
cmd := gitCmdStr(args...)
if err != nil {
return nil, cmd, err
}
var files []models.FileEntry
for _, l := range strings.Split(out, "\n") {
l = strings.TrimSpace(l)
if l == "" {
continue
}
countOut, _ := gitAt(rp, "log", "--oneline", "--follow", branch, "--", l)
count := 0
if countOut != "" {
count = len(strings.Split(countOut, "\n"))
}
files = append(files, models.FileEntry{Path: l, CommitCount: count})
}
return files, cmd, nil
}
func ListLog(rp, branch string, limit int) ([]models.CommitEntry, string, error) {
args := []string{"log", "--pretty=format:%H\x1f%s\x1f%an\x1f%ad", "--date=short",
fmt.Sprintf("-%d", limit), branch}
out, err := gitAt(rp, args...)
cmd := gitCmdStr("log", fmt.Sprintf("-%d", limit), "--oneline", branch)
if err != nil {
return nil, cmd, err
}
return ParseCommits(out), cmd, nil
}
func ListRefs(rp string) ([]models.RefEntry, string, error) {
args := []string{"for-each-ref",
"--format=%(refname:short)\x1f%(objecttype)\x1f%(objectname:short)\x1f%(objectname)",
"refs/heads", "refs/tags"}
out, err := gitAt(rp, args...)
cmd := gitCmdStr("for-each-ref", "refs/heads", "refs/tags")
if err != nil {
return nil, cmd, err
}
var refs []models.RefEntry
for _, line := range strings.Split(out, "\n") {
line = strings.TrimSpace(line)
if line == "" {
continue
}
parts := strings.SplitN(line, "\x1f", 4)
if len(parts) < 4 {
continue
}
kind := "branch"
if parts[1] == "tag" {
kind = "tag"
}
refs = append(refs, models.RefEntry{Kind: kind, Name: parts[0], Short: parts[2], Hash: parts[3]})
}
return refs, cmd, nil
}
func FileHistory(rp, path, branch string) ([]models.CommitEntry, string, error) {
args := []string{"log", "--all", "--follow",
"--pretty=format:%H\x1f%s\x1f%an\x1f%ad", "--date=short", branch, "--", path}
out, err := gitAt(rp, args...)
cmd := gitCmdStr("log", "--all", "--follow", "--oneline", branch, "--", path)
if err != nil {
return nil, cmd, err
}
return ParseCommits(out), cmd, nil
}
func FileAtCommit(rp, hash, path string) (string, string, error) {
ref := fmt.Sprintf("%s:%s", hash, path)
args := []string{"show", ref}
out, err := gitAt(rp, args...)
return out, gitCmdStr(args...), err
}
func CommitMeta(rp, hash string) (string, string) {
meta, _ := gitAt(rp, "show", "--no-patch",
"--pretty=format:%s\x1f%an\x1f%ae\x1f%ad", "--date=format:%Y-%m-%d %H:%M", hash)
return meta, gitCmdStr("show", "--stat", hash)
}
func CommitFiles(rp, hash string) string {
out, _ := gitAt(rp, "diff-tree", "--no-commit-id", "-r", "--name-status", hash)
return out
}
func ParseCommits(out string) []models.CommitEntry {
var commits []models.CommitEntry
for _, line := range strings.Split(out, "\n") {
line = strings.TrimSpace(line)
if line == "" {
continue
}
parts := strings.SplitN(line, "\x1f", 4)
if len(parts) < 4 {
continue
}
short := parts[0]
if len(short) > 8 {
short = short[:8]
}
commits = append(commits, models.CommitEntry{
Hash: parts[0], Short: short,
Message: parts[1], Author: parts[2], Date: parts[3],
})
}
return commits
}
func FileIcon(name string) string {
ext := ""
if i := strings.LastIndex(name, "."); i >= 0 {
ext = name[i+1:]
}
switch ext {
case "go":
return "🔵"
case "js", "ts", "jsx", "tsx":
return "🟡"
case "py":
return "🟢"
case "md":
return "📝"
case "sh", "bash":
return "⚙️"
case "json", "yaml", "yml", "toml":
return "🔧"
case "html", "css":
return "🌐"
case "rs":
return "🦀"
case "c", "cpp", "h":
return "🔩"
}
return "📄"
}
func HighlightCode(content, filename string) (string, string) {
lexer := lexers.Match(filename)
if lexer == nil {
lexer = lexers.Analyse(content)
}
if lexer == nil {
lexer = lexers.Fallback
}
lexer = chromalib.Coalesce(lexer)
style := styles.Get("onedark")
if style == nil {
style = styles.Fallback
}
formatter := chromahtml.New(
chromahtml.WithClasses(true),
chromahtml.TabWidth(4),
chromahtml.WithLineNumbers(true),
chromahtml.LineNumbersInTable(true),
)
var cssBuf bytes.Buffer
if err := formatter.WriteCSS(&cssBuf, style); err != nil {
return plainFallback(content), ""
}
chromaCSS := cssBuf.String()
iterator, err := lexer.Tokenise(nil, content)
if err != nil {
return plainFallback(content), chromaCSS
}
var hlBuf bytes.Buffer
if err := formatter.Format(&hlBuf, style, iterator); err != nil {
return plainFallback(content), chromaCSS
}
return hlBuf.String(), chromaCSS
}
func plainFallback(content string) string {
return `<pre style="padding:1rem;overflow:auto;font-size:0.82rem;line-height:1.65">` +
template.HTMLEscapeString(content) + `</pre>`
}
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