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// static.go — the offline export: the same pages written out as files.
//
// Everything that needs a server (comments, live activity, jj queries) is
// omitted; the trace/notes toggle, the file finder and the note filters all
// keep working, since they run in the browser.
package main
import (
"bytes"
"fmt"
"html/template"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
)
func run(dir string, name string, args ...string) []byte {
cmd := exec.Command(name, args...)
cmd.Dir = dir
out, err := cmd.Output()
if err != nil {
if ee, ok := err.(*exec.ExitError); ok {
os.Stderr.Write(ee.Stderr)
}
fatal("%s %s: %v", name, strings.Join(args, " "), err)
}
return out
}
func buildSite(logPath, repoAbs, out, title string, theme, light *Theme) {
start := time.Now()
site := buildModel(title, readLog(logPath))
site.Theme, site.Light, site.Repo = theme, light, repoAbs
if site.Change == "" {
fatal("log has no jj change ids")
}
// every file in the repo at the site change; content comes from one
// git archive of the commit instead of a jj spawn per file
list, err := jjRun(repoAbs, "file", "list", "-r", site.Change)
if err != nil {
fmt.Fprintln(os.Stderr, err)
fatal("change %s is not in %s — logs are per repository; point -repo at the one the trace was recorded in", short(site.Change), repoAbs)
}
site.All = site.filesAt(strings.Split(strings.TrimRight(string(list), "\n"), "\n"), site.Change)
commit := strings.TrimSpace(string(mustJJ(repoAbs, "log", "-r", site.Change, "--no-graph", "-T", "commit_id")))
tmp, err := os.MkdirTemp("", "vrsite-")
if err != nil {
fatal("%v", err)
}
defer os.RemoveAll(tmp)
archive := exec.Command("git", "-C", repoAbs, "archive", commit)
untar := exec.Command("tar", "-x", "-C", tmp)
untar.Stdin, _ = archive.StdoutPipe()
untar.Stderr = os.Stderr
if err := untar.Start(); err != nil {
fatal("tar: %v", err)
}
if err := archive.Run(); err != nil {
fatal("git archive %s: %v", short(commit), err)
}
if err := untar.Wait(); err != nil {
fatal("tar: %v", err)
}
writeSite(site, out, tmp)
stubs := 0
for _, f := range site.All {
if f.Stub != "" {
stubs++
}
}
fmt.Printf("vrsite: %d files (%d traced, %d not rendered), %d notes, %d agents in %s -> %s\n",
len(site.All), len(site.Order), stubs, len(site.Notes), len(site.Agents),
time.Since(start).Round(time.Millisecond), out)
}
func writeSite(site *Site, out, srcDir string) {
tpl := newTemplates()
if err := os.MkdirAll(out, 0o755); err != nil {
fatal("%v", err)
}
each := func(fn func(f *File)) {
sem := make(chan struct{}, runtime.NumCPU())
var wg sync.WaitGroup
for _, f := range site.All {
wg.Add(1)
sem <- struct{}{}
go func(f *File) {
defer func() { <-sem; wg.Done() }()
fn(f)
}(f)
}
wg.Wait()
}
// phase A: content — coverage percentages must exist before any tree
// or index below is written
hl := newHighlighter(site.Theme, site.Light)
each(func(f *File) {
src, err := os.ReadFile(filepath.Join(srcDir, f.Path))
switch {
case err != nil:
f.Stub = "not present in the archived commit"
case bytes.IndexByte(src, 0) >= 0:
f.Stub = "binary file — not rendered"
case len(src) > 2<<20:
f.Stub = fmt.Sprintf("file too large to render (%d KB)", len(src)/1024)
default:
f.render(src, hl)
}
})
cf := mustCreate(filepath.Join(out, "style.css"))
if err := renderCSS(cf, site); err != nil {
fatal("css: %v", err)
}
cf.Close()
for _, name := range []string{"app.js"} {
b, err := tfs.ReadFile("assets/" + name)
if err != nil {
fatal("%v", err)
}
if err := os.WriteFile(filepath.Join(out, name), b, 0o644); err != nil {
fatal("%v", err)
}
}
// shared tree fragment: the only nav tree, fetched by every page; "@@" is
// replaced with the page root by app.js, since the fragment is fetched
// from any page depth
treeFrag := renderTree(site.All, func(p string) string { return "@@code/" + p + ".html" })
if err := os.WriteFile(filepath.Join(out, "tree.html"), []byte(treeFrag), 0o644); err != nil {
fatal("%v", err)
}
facets := site.Facets()
render := func(path string, p *page) {
p.Site, p.Facets, p.ChangeID = site, facets, site.Change
f := mustCreate(path)
if err := tpl.Execute(f, p); err != nil {
fatal("render %s: %v", path, err)
}
f.Close()
}
latest := site.FilterNotes(NoteFilter{})
if len(latest) > 24 {
latest = latest[:24]
}
render(filepath.Join(out, "index.html"), &page{Kind: "index", Title: site.Title, Notes: latest})
fullTree := renderTree(site.All, func(p string) string { return "code/" + p + ".html" })
render(filepath.Join(out, "files.html"), &page{Kind: "files", Title: "files — " + site.Title,
Tree: template.HTML(fullTree)})
render(filepath.Join(out, "notes.html"), &page{Kind: "notes", Title: "notes — " + site.Title,
Notes: site.FilterNotes(NoteFilter{})})
// phase B: every file page, in parallel
each(func(f *File) {
dst := filepath.Join(out, "code", f.Path+".html")
os.MkdirAll(filepath.Dir(dst), 0o755)
depth := strings.Count(f.Path, "/") + 1
render(dst, &page{Kind: "file", Title: f.Path + " — " + site.Title,
Root: strings.Repeat("../", depth), Current: f.Path, File: f})
})
}
func mustCreate(path string) *os.File {
f, err := os.Create(path)
if err != nil {
fatal("%v", err)
}
return f
}
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