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|
package site
import (
"bytes"
"compress/gzip"
"context"
"crypto/sha256"
"fmt"
"html/template"
"mime"
"net/url"
"path"
"sort"
"strconv"
"strings"
"sync"
"unicode/utf8"
"github.com/alecthomas/chroma/v2"
"github.com/alecthomas/chroma/v2/formatters/html"
"github.com/alecthomas/chroma/v2/lexers"
"github.com/alecthomas/chroma/v2/styles"
"github.com/npfaro/dumbforge/internal/gitutil"
"github.com/npfaro/dumbforge/internal/s3store"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
)
const (
siteCache = "no-cache, max-age=0, must-revalidate"
rawCache = "no-cache, max-age=0, must-revalidate"
)
type Page struct {
Route string
Body []byte
ContentType string
Cache string
Root bool
}
type Build struct {
Pages []Page
Deletes []string
}
type Generator struct {
Git gitutil.Git
BaseURL string
RepoName string
Owner string
CloneURL string
Branches []string
DefaultBranch string
AssetsCurrent bool
Progress func(format string, args ...any)
templates *template.Template
submoduleMu sync.Mutex
submoduleCache map[string]map[string]string
commitMu sync.Mutex
generated map[string]struct{}
assetOnce sync.Once
assetVersion string
}
type Commit struct {
OID string
ShortOID string
Author string
Email string
Date string
DateTime string
Message string
Body string
Initials string
AvatarURL string
URL string
Parents []string
}
type TreeEntry struct {
Mode string
Type string
OID string
Size int64
Name string
URL string
CommitMessage string
CommitURL string
CommitDate string
CommitDateTime string
SubmoduleURL string
}
type Crumb struct {
Name string
URL string
}
type pageData struct {
Kind string
Title string
BaseURL string
RepoName string
RepoAvatarURL string
Owner string
CloneURL string
Branch string
Path string
ParentURL string
Breadcrumbs []Crumb
Entries []TreeEntry
Commit Commit
CommitCount int
CommitsURL string
CommitGroups []CommitGroup
ViewedCommit CommitView
BranchesURL string
FilesURL string
DefaultBranch string
GitHubImportURL string
Description string
Homepage string
HomepageLabel string
SourceURL string
Languages []LanguageStat
Contributors []Contributor
ContributorCount int
ReadmeName string
Readme template.HTML
Markdown template.HTML
Code template.HTML
RawURL string
Language string
FileSize int64
IsImage bool
IsMarkdown bool
IsSubmodule bool
SubmoduleURL string
SubmoduleOID string
AssetVersion string
}
func New(git gitutil.Git, baseURL, repoName, owner string) (*Generator, error) {
if repoName == "" {
repoName = "repository"
}
tmpl, err := template.New("page").Funcs(template.FuncMap{
"humanSize": humanSize,
"icon": icon,
}).Parse(pageTemplate)
if err != nil {
return nil, err
}
return &Generator{
Git: git,
BaseURL: strings.TrimRight(baseURL, "/"),
RepoName: strings.TrimSuffix(repoName, ".git"),
Owner: owner,
CloneURL: strings.TrimRight(baseURL, "/"),
templates: tmpl,
generated: make(map[string]struct{}),
}, nil
}
func (g *Generator) AssetVersion() string {
g.assetOnce.Do(func() {
hash := sha256.New()
_, _ = hash.Write([]byte(siteCSS))
_, _ = hash.Write([]byte(g.chromaCSS()))
_, _ = hash.Write(gabrielMarkSVG)
_, _ = hash.Write(gabrielMarkPNG)
g.assetVersion = fmt.Sprintf("%x", hash.Sum(nil))
})
return g.assetVersion
}
func (g *Generator) SetAssetsCurrent(current bool) {
g.AssetsCurrent = current
}
// BuildBranch generates a full branch browser when oldOID is empty. For later
// pushes it only regenerates changed blobs and the directory pages that contain
// them. The repository landing page is refreshed when isHead is true.
func (g *Generator) BuildBranch(ctx context.Context, branch, oldOID, newOID string, isHead bool) (Build, error) {
g.ensureBranch(branch, isHead)
summary, err := g.branchSummary(ctx, branch, newOID)
if err != nil {
return Build{}, err
}
result := Build{}
if !g.AssetsCurrent {
result.Pages = append(result.Pages, Page{
Route: ".dumbforge/assets/site.css",
Body: []byte(siteCSS + g.chromaCSS()),
ContentType: "text/css; charset=utf-8",
Cache: siteCache,
})
result.Pages = append(result.Pages, brandPages()...)
result.Pages = append(result.Pages, Page{
Route: ".dumbforge/site-version",
Body: []byte(g.AssetVersion() + "\n"),
ContentType: "text/plain; charset=utf-8",
Cache: siteCache,
})
}
commitsPage, err := g.commitsPage(branch, summary)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, commitsPage)
if oldOID == "" {
filesPage, err := g.filesPage(ctx, branch, newOID)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, filesPage)
entries, err := g.listTreeRecursive(ctx, newOID)
if err != nil {
return Build{}, err
}
g.decorateSubmodules(ctx, newOID, "", entries)
dirs := map[string]struct{}{"": {}}
for _, entry := range entries {
if entry.Type == "tree" {
dirs[entry.Name] = struct{}{}
continue
}
pages, err := g.blobPages(ctx, branch, newOID, entry, summary)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, pages...)
}
for _, dir := range sortedKeys(dirs) {
if dir == "" && isHead {
continue
}
page, err := g.treePage(ctx, branch, newOID, dir, summary, false)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, page)
}
} else {
changes, err := g.Git.DiffNameStatus(ctx, oldOID, newOID)
if err != nil {
g.progress("could not diff %s..%s; rebuilding branch", short(oldOID), short(newOID))
return g.BuildBranch(ctx, branch, "", newOID, isHead)
}
if fileNavigationChanged(changes) {
filesPage, err := g.filesPage(ctx, branch, newOID)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, filesPage)
}
dirs := map[string]struct{}{"": {}}
for _, change := range changes {
if change.OldPath != "" {
result.Deletes = append(result.Deletes,
path.Join("blob", branchRouteSegment(branch), change.OldPath),
path.Join("raw", branchRouteSegment(branch), change.OldPath),
)
addAncestorDirs(dirs, change.OldPath)
}
if strings.HasPrefix(change.Status, "D") {
result.Deletes = append(result.Deletes,
path.Join("blob", branchRouteSegment(branch), change.Path),
path.Join("raw", branchRouteSegment(branch), change.Path),
)
addAncestorDirs(dirs, change.Path)
continue
}
entry, err := g.entry(ctx, newOID, change.Path)
if err != nil {
return Build{}, err
}
changedEntries := []TreeEntry{entry}
g.decorateSubmodules(ctx, newOID, "", changedEntries)
pages, err := g.blobPages(ctx, branch, newOID, changedEntries[0], summary)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, pages...)
addAncestorDirs(dirs, change.Path)
}
for _, dir := range sortedKeys(dirs) {
if dir == "" && isHead {
continue
}
exists, err := g.treeExists(ctx, newOID, dir)
if err != nil {
return Build{}, err
}
if !exists {
result.Deletes = append(result.Deletes, path.Join("tree", branchRouteSegment(branch), dir))
continue
}
page, err := g.treePage(ctx, branch, newOID, dir, summary, false)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, page)
}
}
if isHead {
landing, err := g.treePage(ctx, branch, newOID, "", summary, true)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, landing)
}
commitPages, err := g.commitPages(ctx, branch, oldOID, newOID, summary)
if err != nil {
return Build{}, err
}
result.Pages = append(result.Pages, commitPages...)
result.Deletes = uniqueStrings(result.Deletes)
return result, nil
}
func fileNavigationChanged(changes []gitutil.NameStatus) bool {
for _, change := range changes {
if change.Status == "" || change.Status[0] != 'M' || change.Path == ".gitmodules" || change.OldPath == ".gitmodules" {
return true
}
}
return false
}
func (g *Generator) Publish(ctx context.Context, store *s3store.Store, build Build) error {
for _, route := range build.Deletes {
if err := store.Delete(ctx, route); err != nil {
return err
}
}
ctx, cancel := context.WithCancel(ctx)
defer cancel()
jobs := make(chan Page)
errCh := make(chan error, 1)
var once sync.Once
var workers sync.WaitGroup
for range 32 {
workers.Add(1)
go func() {
defer workers.Done()
for page := range jobs {
body, encoding, err := compressedPage(page)
if err != nil {
once.Do(func() {
errCh <- err
cancel()
})
return
}
if page.Root {
err = store.PutRootEncoded(ctx, body, page.ContentType, page.Cache, encoding)
} else {
err = store.PutEncoded(ctx, page.Route, body, page.ContentType, page.Cache, encoding)
}
if err != nil {
once.Do(func() {
errCh <- err
cancel()
})
return
}
}
}()
}
sendPages:
for _, page := range build.Pages {
select {
case jobs <- page:
case <-ctx.Done():
break sendPages
}
}
close(jobs)
workers.Wait()
select {
case err := <-errCh:
return err
default:
}
for _, page := range build.Pages {
if strings.HasPrefix(page.Route, "commit/") {
g.markCommitGenerated(strings.TrimPrefix(page.Route, "commit/"))
}
}
g.progress("published %d site object(s), removed %d", len(build.Pages), len(build.Deletes))
return nil
}
func compressedPage(page Page) ([]byte, string, error) {
if len(page.Body) < 1024 || !compressibleContentType(page.ContentType) {
return page.Body, "", nil
}
var compressed bytes.Buffer
writer, err := gzip.NewWriterLevel(&compressed, gzip.BestSpeed)
if err != nil {
return nil, "", err
}
if _, err := writer.Write(page.Body); err != nil {
return nil, "", err
}
if err := writer.Close(); err != nil {
return nil, "", err
}
if compressed.Len() >= len(page.Body) {
return page.Body, "", nil
}
return compressed.Bytes(), "gzip", nil
}
func compressibleContentType(contentType string) bool {
return strings.HasPrefix(contentType, "text/") ||
strings.HasPrefix(contentType, "application/json") ||
strings.HasPrefix(contentType, "application/javascript") ||
strings.HasPrefix(contentType, "image/svg+xml")
}
func (g *Generator) treePage(ctx context.Context, branch, oid, dir string, summary branchSummary, root bool) (Page, error) {
entries, err := g.listTree(ctx, oid, dir)
if err != nil {
return Page{}, err
}
g.decorateSubmodules(ctx, oid, dir, entries)
for i := range entries {
fullPath := path.Join(dir, entries[i].Name)
if entries[i].Type == "tree" {
entries[i].URL = routeURL(g.BaseURL, path.Join("tree", branchRouteSegment(branch), fullPath))
} else if entries[i].SubmoduleURL != "" {
entries[i].URL = entries[i].SubmoduleURL
} else {
entries[i].URL = routeURL(g.BaseURL, path.Join("blob", branchRouteSegment(branch), fullPath))
}
}
if err := g.populateEntryCommits(ctx, oid, dir, entries); err != nil {
return Page{}, err
}
data := g.pageData("tree", g.RepoName, branch, summary)
data.Path = dir
data.Breadcrumbs = g.breadcrumbs(branch, dir, "tree")
data.Entries = entries
if dir != "" {
data.Title = path.Base(dir) + " · " + g.RepoName
parent := path.Dir(dir)
if parent == "." && branch == g.DefaultBranch {
data.ParentURL = g.BaseURL
} else {
data.ParentURL = routeURL(g.BaseURL, path.Join("tree", branchRouteSegment(branch), parent))
}
}
if root {
data.Kind = "repo"
readmeName, readme, err := g.readme(ctx, oid, entries)
if err != nil {
return Page{}, err
}
data.ReadmeName = readmeName
data.Readme = readme
}
body, err := g.render(data)
if err != nil {
return Page{}, err
}
if root {
return Page{Body: body, ContentType: "text/html; charset=utf-8", Cache: siteCache, Root: true}, nil
}
return Page{Route: path.Join("tree", branchRouteSegment(branch), dir), Body: body, ContentType: "text/html; charset=utf-8", Cache: siteCache}, nil
}
func (g *Generator) populateEntryCommits(ctx context.Context, oid, dir string, entries []TreeEntry) error {
if len(entries) == 0 {
return nil
}
ctx, cancel := context.WithCancel(ctx)
defer cancel()
workers := min(8, len(entries))
jobs := make(chan int)
var wait sync.WaitGroup
var once sync.Once
var firstErr error
for range workers {
wait.Add(1)
go func() {
defer wait.Done()
for index := range jobs {
commit, err := g.entryCommit(ctx, oid, path.Join(dir, entries[index].Name))
if err != nil {
once.Do(func() {
firstErr = err
cancel()
})
continue
}
entries[index].CommitMessage = commit.Message
entries[index].CommitURL = routeURL(g.BaseURL, path.Join("commit", commit.OID))
entries[index].CommitDate = commit.Date
entries[index].CommitDateTime = commit.DateTime
}
}()
}
sendJobs:
for index := range entries {
select {
case jobs <- index:
case <-ctx.Done():
break sendJobs
}
}
close(jobs)
wait.Wait()
return firstErr
}
func (g *Generator) entryCommit(ctx context.Context, oid, filePath string) (Commit, error) {
out, err := g.Git.Run(ctx, "--literal-pathspecs", "log", "-1", "--format=%H%x00%s%x00%aI", oid, "--", filePath)
if err != nil {
return Commit{}, err
}
fields := strings.Split(strings.TrimSpace(string(out)), "\x00")
if len(fields) != 3 || fields[0] == "" {
return Commit{}, fmt.Errorf("could not find the latest commit for %s", filePath)
}
return Commit{OID: fields[0], Message: fields[1], Date: displayDate(fields[2]), DateTime: fields[2]}, nil
}
func (g *Generator) blobPages(ctx context.Context, branch, oid string, entry TreeEntry, summary branchSummary) ([]Page, error) {
var content []byte
var err error
if entry.Type == "commit" {
content = []byte("Submodule commit " + entry.OID + "\n")
} else {
content, err = g.Git.Run(ctx, "show", oid+":"+entry.Name)
if err != nil {
return nil, err
}
}
rawRoute := path.Join("raw", branchRouteSegment(branch), entry.Name)
contentType, previewImage := safeRawContentType(entry.Name, content)
data := g.pageData("blob", path.Base(entry.Name)+" · "+g.RepoName, branch, summary)
data.Path = entry.Name
data.Breadcrumbs = g.breadcrumbs(branch, entry.Name, "blob")
data.RawURL = routeURL(g.BaseURL, rawRoute)
data.FileSize = int64(len(content))
data.IsSubmodule = entry.Type == "commit"
data.SubmoduleURL = entry.SubmoduleURL
data.SubmoduleOID = entry.OID
data.IsImage = previewImage
if data.IsSubmodule {
data.Language = "Submodule"
} else if data.IsImage {
data.Language = "Image"
} else if bytes.IndexByte(content, 0) >= 0 || !utf8.Valid(content) {
data.Language = "Binary"
} else if len(content) > 2*1024*1024 {
data.Language = "Large text file"
} else if isMarkdownFile(entry.Name) {
data.Markdown, err = renderMarkdown(content)
if err != nil {
return nil, err
}
data.IsMarkdown = true
data.Language = "Markdown"
} else {
code, language, err := highlight(entry.Name, content)
if err != nil {
return nil, err
}
data.Code = code
data.Language = language
}
body, err := g.render(data)
if err != nil {
return nil, err
}
return []Page{
{Route: path.Join("blob", branchRouteSegment(branch), entry.Name), Body: body, ContentType: "text/html; charset=utf-8", Cache: siteCache},
{Route: rawRoute, Body: content, ContentType: contentType, Cache: rawCache},
}, nil
}
// Raw files share an origin with the generated repository browser. Serving
// user-controlled HTML, JavaScript, or SVG with an executable media type would
// let a repository run script in that origin, so only inert raster formats are
// previewed as images. Other UTF-8 files are deliberately served as plain text.
func safeRawContentType(filename string, content []byte) (string, bool) {
contentType := mime.TypeByExtension(path.Ext(filename))
mediaType, _, _ := mime.ParseMediaType(contentType)
switch mediaType {
case "image/avif", "image/bmp", "image/gif", "image/jpeg", "image/png", "image/webp", "image/x-icon", "image/vnd.microsoft.icon":
return contentType, true
}
if bytes.IndexByte(content, 0) < 0 && utf8.Valid(content) {
return "text/plain; charset=utf-8", false
}
return "application/octet-stream", false
}
func (g *Generator) readme(ctx context.Context, oid string, entries []TreeEntry) (string, template.HTML, error) {
for _, entry := range entries {
if entry.Type != "blob" || !strings.HasPrefix(strings.ToLower(entry.Name), "readme") {
continue
}
content, err := g.Git.Run(ctx, "show", oid+":"+entry.Name)
if err != nil {
return "", "", err
}
rendered, err := renderMarkdown(content)
if err != nil {
return "", "", err
}
return entry.Name, rendered, nil
}
return "", "", nil
}
func isMarkdownFile(filename string) bool {
switch strings.ToLower(path.Ext(filename)) {
case ".md", ".markdown", ".mdown", ".mkd", ".mkdn":
return true
default:
return false
}
}
func renderMarkdown(content []byte) (template.HTML, error) {
var rendered bytes.Buffer
markdown := goldmark.New(
goldmark.WithExtensions(extension.GFM),
goldmark.WithParserOptions(parser.WithAutoHeadingID()),
)
if err := markdown.Convert(content, &rendered); err != nil {
return "", err
}
// #nosec G203 -- Goldmark's safe renderer filters raw HTML and dangerous URLs.
return template.HTML(rendered.String()), nil
}
func highlight(filename string, content []byte) (template.HTML, string, error) {
lexer := lexers.Match(filename)
if lexer == nil {
lexer = lexers.Analyse(string(content))
}
if lexer == nil {
lexer = lexers.Fallback
}
lexer = chroma.Coalesce(lexer)
iterator, err := lexer.Tokenise(nil, string(content))
if err != nil {
return "", "", err
}
formatter := html.New(
html.WithClasses(true),
html.WithLineNumbers(true),
html.LineNumbersInTable(true),
html.WithLinkableLineNumbers(true, "L"),
html.TabWidth(4),
)
var rendered bytes.Buffer
if err := formatter.Format(&rendered, styles.Get("github"), iterator); err != nil {
return "", "", err
}
// #nosec G203 -- Chroma escapes source tokens before producing this HTML.
return template.HTML(rendered.String()), lexer.Config().Name, nil
}
func (g *Generator) chromaCSS() string {
formatter := html.New(html.WithClasses(true), html.WithAllClasses(true))
diffFormatter := html.New(html.WithClasses(true), html.WithAllClasses(true), html.ClassPrefix("diff-"))
var light, diffLight, dark, diffDark bytes.Buffer
_ = formatter.WriteCSS(&light, styles.Get("github"))
_ = diffFormatter.WriteCSS(&diffLight, styles.Get("github"))
_ = formatter.WriteCSS(&dark, styles.Get("github-dark"))
_ = diffFormatter.WriteCSS(&diffDark, styles.Get("github-dark"))
// Keep the light rules out of the dark cascade. Some dark Chroma tokens
// intentionally inherit the theme's base colour, so there is no explicit
// dark rule to override an always-on light token rule.
return "\n@media (prefers-color-scheme: light) {\n" + light.String() + diffLight.String() + "}\n" +
"@media (prefers-color-scheme: dark) {\n" + dark.String() + diffDark.String() + "}\n"
}
func (g *Generator) render(data pageData) ([]byte, error) {
var result bytes.Buffer
if err := g.templates.Execute(&result, data); err != nil {
return nil, err
}
return result.Bytes(), nil
}
func (g *Generator) pageData(kind, title, branch string, summary branchSummary) pageData {
data := pageData{
Kind: kind,
Title: title,
BaseURL: g.BaseURL,
RepoName: g.RepoName,
Owner: g.Owner,
CloneURL: g.CloneURL,
Branch: branch,
Commit: summary.Latest,
CommitCount: summary.Count,
CommitsURL: summary.CommitsURL,
CommitGroups: summary.Groups,
BranchesURL: routeURL(g.BaseURL, ".dumbforge/repository.json"),
FilesURL: routeURL(g.BaseURL, path.Join(".dumbforge/files", branchRouteSegment(branch)+".json")),
DefaultBranch: g.DefaultBranch,
GitHubImportURL: "https://github.com/new/import",
Description: summary.Repository.Description,
Homepage: summary.Repository.Homepage,
HomepageLabel: summary.Repository.HomepageLabel,
SourceURL: summary.Repository.SourceURL,
Languages: summary.Repository.Languages,
Contributors: summary.Repository.Contributors,
ContributorCount: summary.Repository.ContributorCount,
AssetVersion: g.AssetVersion(),
}
if len(summary.Repository.Contributors) > 0 {
data.RepoAvatarURL = summary.Repository.Contributors[0].AvatarURL
}
return data
}
func (g *Generator) commitsPage(branch string, summary branchSummary) (Page, error) {
data := g.pageData("commits", "Commits · "+g.RepoName, branch, summary)
body, err := g.render(data)
if err != nil {
return Page{}, err
}
return Page{
Route: path.Join("commits", branchRouteSegment(branch)),
Body: body,
ContentType: "text/html; charset=utf-8",
Cache: siteCache,
}, nil
}
func (g *Generator) listTree(ctx context.Context, oid, dir string) ([]TreeEntry, error) {
treeish := oid
if dir != "" {
treeish += ":" + dir
}
out, err := g.Git.Run(ctx, "ls-tree", "-z", "-l", treeish)
if err != nil {
return nil, err
}
entries, err := parseTree(out)
if err != nil {
return nil, err
}
sortTree(entries)
return entries, nil
}
func (g *Generator) listTreeRecursive(ctx context.Context, oid string) ([]TreeEntry, error) {
out, err := g.Git.Run(ctx, "ls-tree", "-r", "-t", "-z", "-l", oid)
if err != nil {
return nil, err
}
return parseTree(out)
}
func (g *Generator) entry(ctx context.Context, oid, name string) (TreeEntry, error) {
out, err := g.Git.Run(ctx, "--literal-pathspecs", "ls-tree", "-z", "-l", oid, "--", name)
if err != nil {
return TreeEntry{}, err
}
entries, err := parseTree(out)
if err != nil {
return TreeEntry{}, err
}
if len(entries) != 1 {
return TreeEntry{}, fmt.Errorf("path %s is not a file at %s", name, short(oid))
}
return entries[0], nil
}
func (g *Generator) treeExists(ctx context.Context, oid, dir string) (bool, error) {
if dir == "" || dir == "." {
return true, nil
}
out, err := g.Git.Run(ctx, "cat-file", "-t", oid+":"+dir)
if err != nil {
return false, nil
}
return strings.TrimSpace(string(out)) == "tree", nil
}
func parseTree(data []byte) ([]TreeEntry, error) {
var result []TreeEntry
for _, record := range bytes.Split(data, []byte{0}) {
if len(record) == 0 {
continue
}
parts := bytes.SplitN(record, []byte{'\t'}, 2)
if len(parts) != 2 {
return nil, fmt.Errorf("malformed ls-tree record")
}
fields := strings.Fields(string(parts[0]))
if len(fields) != 4 {
return nil, fmt.Errorf("malformed ls-tree header %q", parts[0])
}
size := int64(-1)
if fields[3] != "-" {
var err error
size, err = strconv.ParseInt(fields[3], 10, 64)
if err != nil {
return nil, err
}
}
result = append(result, TreeEntry{Mode: fields[0], Type: fields[1], OID: fields[2], Size: size, Name: string(parts[1])})
}
return result, nil
}
func sortTree(entries []TreeEntry) {
sort.Slice(entries, func(i, j int) bool {
if (entries[i].Type == "tree") != (entries[j].Type == "tree") {
return entries[i].Type == "tree"
}
return strings.ToLower(entries[i].Name) < strings.ToLower(entries[j].Name)
})
}
func (g *Generator) breadcrumbs(branch, filePath, leafKind string) []Crumb {
crumbs := []Crumb{{Name: g.RepoName, URL: g.BaseURL}}
parts := strings.Split(strings.Trim(filePath, "/"), "/")
for i, part := range parts {
if part == "" {
continue
}
prefix := path.Join(parts[:i+1]...)
routeKind := "tree"
if i == len(parts)-1 {
routeKind = leafKind
}
crumbs = append(crumbs, Crumb{Name: part, URL: routeURL(g.BaseURL, path.Join(routeKind, branchRouteSegment(branch), prefix))})
}
return crumbs
}
func routeURL(base, route string) string {
parts := strings.Split(strings.Trim(route, "/"), "/")
for i := range parts {
parts[i] = url.PathEscape(parts[i])
}
if len(parts) == 1 && parts[0] == "" {
return strings.TrimRight(base, "/")
}
return strings.TrimRight(base, "/") + "/" + strings.Join(parts, "/")
}
// Git ref names cannot contain '~', so it is an unambiguous stand-in for '/'
// when a branch name must occupy one component of the static URL hierarchy.
func branchRouteSegment(branch string) string {
return strings.ReplaceAll(branch, "/", "~")
}
func addAncestorDirs(dirs map[string]struct{}, filePath string) {
dir := path.Dir(filePath)
for dir != "." && dir != "/" && dir != "" {
dirs[dir] = struct{}{}
dir = path.Dir(dir)
}
dirs[""] = struct{}{}
}
func sortedKeys(values map[string]struct{}) []string {
result := make([]string, 0, len(values))
for value := range values {
result = append(result, value)
}
sort.Strings(result)
return result
}
func uniqueStrings(values []string) []string {
seen := map[string]struct{}{}
result := make([]string, 0, len(values))
for _, value := range values {
if _, ok := seen[value]; ok {
continue
}
seen[value] = struct{}{}
result = append(result, value)
}
sort.Strings(result)
return result
}
func initials(name string) string {
fields := strings.Fields(name)
if len(fields) == 0 {
return "?"
}
result := string([]rune(fields[0])[0])
if len(fields) > 1 {
result += string([]rune(fields[len(fields)-1])[0])
}
return strings.ToUpper(result)
}
func humanSize(size int64) string {
if size < 0 {
return ""
}
if size < 1024 {
return fmt.Sprintf("%d B", size)
}
units := []string{"KB", "MB", "GB"}
value := float64(size)
for _, unit := range units {
value /= 1024
if value < 1024 {
return fmt.Sprintf("%.1f %s", value, unit)
}
}
return fmt.Sprintf("%.1f TB", value/1024)
}
func short(oid string) string {
if len(oid) > 7 {
return oid[:7]
}
return oid
}
func (g *Generator) progress(format string, args ...any) {
if g.Progress != nil {
g.Progress(format, args...)
}
}
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