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package main
import (
"fmt"
"io"
"os"
"os/exec"
"path/filepath"
"strings"
)
/* TODO: config.h */
const SiteTitle = "mallocd.com"
const FooterText = "made with <a href=\"https://github.com/uint23/kew\">kew</a>"
const TemplateFile = "template.html"
const NavDirSymbol = "/"
const NavFileSymbol = ": "
const NavCurrentSymbol = "@ "
type NavNode struct {
Name string
Path string
Files []NavNode
Children []NavNode
}
func title_from_name(name string) string {
name = strings.TrimSuffix(name, ".md")
name = strings.ReplaceAll(name, "-", " ")
return name
}
func build_nav(dir string, root string) (NavNode, bool) {
var node NavNode
node.Name = title_from_name(filepath.Base(dir))
entries, err := os.ReadDir(dir)
if err != nil {
return node, false
}
for _, e := range entries {
full := filepath.Join(dir, e.Name())
if e.IsDir() {
child, ok := build_nav(full, root)
if ok {
_, err := os.Stat(filepath.Join(full, "index.md"))
if err == nil {
rel_dir, _ := filepath.Rel(root, full)
child.Path = rel_dir + "/index.html"
}
node.Children = append(node.Children, child)
}
continue
}
if strings.HasSuffix(e.Name(), ".md") {
rel, _ := filepath.Rel(root, full)
html := strings.TrimSuffix(rel, ".md") + ".html"
node.Files = append(node.Files, NavNode{
Name: title_from_name(e.Name()),
Path: html,
})
}
}
if len(node.Files) == 0 && len(node.Children) == 0 {
return node, false
}
return node, true
}
func render_nav(n NavNode, b *strings.Builder, cur string) {
b.WriteString("<ul>\n")
for _, f := range n.Files {
p := f.Path
if !strings.HasPrefix(p, "/") {
p = "/" + p
}
sym := NavFileSymbol
if p == cur {
sym = NavCurrentSymbol
}
b.WriteString(`<li><a href="` + p + `">` + sym + f.Name + "</a></li>\n")
}
for _, c := range n.Children {
sym := NavDirSymbol
if c.Path == cur {
sym = NavCurrentSymbol
}
if c.Path != "" {
p := c.Path
if !strings.HasPrefix(p, "/") {
p = "/" + p
}
b.WriteString(`<li><a href="` + p + `">` + c.Name + sym + `</a>`)
} else {
b.WriteString("<li>" + c.Name + sym)
}
render_nav(c, b, cur)
b.WriteString("</li>\n")
}
b.WriteString("</ul>\n")
}
func markdown_to_html(path string) (string, error) {
cmd := exec.Command("lowdown", "-Thtml")
in, err := os.Open(path)
if err != nil {
return "", err
}
defer in.Close()
var out strings.Builder
cmd.Stdin = in
cmd.Stdout = &out
cmd.Stderr = os.Stderr
err = cmd.Run()
if err != nil {
return "", err
}
return out.String(), nil
}
func copy_file(src string, dst string) error {
in, err := os.Open(src)
if err != nil {
return err
}
defer in.Close()
out, err := os.Create(dst)
if err != nil {
return err
}
defer out.Close()
_, err = io.Copy(out, in)
return err
}
func main() {
if len(os.Args) != 3 {
fmt.Fprintf(os.Stderr, "usage: kew <in> <out>\n")
os.Exit(1)
}
src := os.Args[1]
out := os.Args[2]
/* load template */
tmpl, err := os.ReadFile(filepath.Join(src, TemplateFile))
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
/* build nav */
rootnav, _ := build_nav(src, src)
/* walk site */
err = filepath.WalkDir(src, func(path string, d os.DirEntry, err error) error {
if err != nil {
return err
}
rel, _ := filepath.Rel(src, path)
outpath := filepath.Join(out, rel)
if d.IsDir() {
return os.MkdirAll(outpath, 0755)
}
if strings.HasSuffix(path, ".md") {
html, err := markdown_to_html(path)
if err != nil {
return err
}
relhtml := strings.TrimSuffix(rel, ".md") + ".html"
cur := relhtml
if !strings.HasPrefix(cur, "/") {
cur = "/" + cur
}
var navbuf strings.Builder
render_nav(rootnav, &navbuf, cur)
page := string(tmpl)
page = strings.Replace(page, "{{TITLE}}", SiteTitle, 1)
page = strings.Replace(page, "{{NAV}}", navbuf.String(), 1)
page = strings.Replace(page, "{{CONTENT}}", html, 1)
page = strings.Replace(page, "{{FOOTER}}", FooterText, 1)
outpath = strings.TrimSuffix(outpath, ".md") + ".html"
return os.WriteFile(outpath, []byte(page), 0644)
}
return copy_file(path, outpath)
})
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
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