Initial commit

1 files changed, 261 insertions, 0 deletions

diff --git a/ssg.go b/ssg.go
new file mode 100644
index 0000000..743369d
--- /dev/null
+++ b/ssg.go
@@ -0,0 +1,261 @@
+package main
+
+import (
+	"slices"
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"path/filepath"
+	//"flag"
+	"html/template"
+	"time"
+)
+
+type post struct {
+	InPath string
+	OutPath string
+	ModTime time.Time
+}
+
+type ParsedPost struct {
+	Path string
+	Metadata PostMetadata
+}
+
+type PostMetadata struct {
+	Name string
+	Description string
+}
+
+func buildTemplate(f string, w io.Writer, data interface{}) error {
+	tmpl, err := template.ParseFiles("base.html", "head.html", f)
+	if err != nil {
+		return err
+	}
+	err = tmpl.Execute(w, data)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func main() {
+	args := os.Args
+	if len(args) != 2 {
+		fmt.Fprintf(os.Stderr, "USAGE: %s [postsfolder]", args[0])
+		os.Exit(1)
+	}
+
+
+	postsOutDir := "public/posts/"
+
+	err := os.MkdirAll(postsOutDir, 0o777)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+
+	f, err := os.Open(args[1])
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	defer f.Close()
+
+	entries, err := f.ReadDir(0)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+
+	var files []post = nil
+	for _, entry := range entries {
+		name := entry.Name()
+		outName := strings.TrimSuffix(name, filepath.Ext(name)) + ".html"
+		fi, err := entry.Info()
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(1)
+		}
+		p := post {
+			InPath: filepath.Join(args[1], name),
+			OutPath: filepath.Join(postsOutDir, outName),
+			ModTime: fi.ModTime(),
+		}
+		files = append(files, p)
+	}
+
+	slices.SortFunc(files, func(a, b post) int {
+		if a.ModTime.After(b.ModTime) {
+			return -1
+		} else {
+			return 1
+		}
+	})
+
+	pposts, err := parseMetadata(files)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+
+	err = md2html(files)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+
+	idx, err := os.Create("public/index.html")
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	//var data []string = nil
+	//for _, post := range files {
+	//	data = append(data, filepath.Join("posts", filepath.Base(post.OutPath)))
+	//}
+	for _, ppost := range pposts {
+		fmt.Fprintf(os.Stderr, "name: %s, description: %s\n", ppost.Metadata.Name, ppost.Metadata.Description)
+	}
+	err = buildTemplate("index.html", idx, pposts)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+
+}
+
+func parseMetadata(files []post) ([]ParsedPost, error) {
+	var pposts []ParsedPost = nil
+	for _, file := range files {
+
+		f, err := os.Open(file.InPath)
+		if err != nil {
+			return pposts, err
+		}
+		defer f.Close()
+
+		sc := bufio.NewScanner(f)
+
+		lnb := 1
+		var metadata PostMetadata = PostMetadata {}
+		for sc.Scan() {
+			line := sc.Text()
+			if line == "----" {
+				break
+			}
+			spl := strings.Split(line, "=")
+			if len(spl) != 2 {
+				return pposts, fmt.Errorf("Invalid Metadata: %s:%d", file.InPath, lnb)
+			}
+			switch spl[0] {
+			case "name":
+				metadata.Name = spl[1]
+			case "description":
+				metadata.Description = spl[1]
+			default:
+				fmt.Fprintf(os.Stderr, "Invalid key: %s (%s:%d)\n", spl[0], file.InPath, lnb)
+			}
+			lnb += 1
+		}
+		pposts = append(pposts, ParsedPost {
+			Path: filepath.Join("posts", filepath.Base(file.OutPath)),
+			Metadata: metadata,
+		})
+	}
+	return pposts, nil
+}
+
+func md2html(files []post) error {
+	for _, file := range files {
+		//err = os.WriteFile(file.OutPath, out, 0600)
+		//if err != nil {
+		//	return err
+		//}
+		out, err := execcmd(file)
+		if err != nil {
+			return err
+		}
+		fmt.Println(string(out))
+		tmpl, err := template.New("base.html").ParseFiles("base.html", "head.html")
+		if err != nil {
+			return err
+		}
+		_, err = tmpl.New("body").Parse(string(out))
+		if err != nil {
+			return err
+		}
+		f, err := os.Create(file.OutPath)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		err = tmpl.Execute(f, nil)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func execcmd(file post) ([]byte, error) {
+	cmd := exec.Command("converter/md2html", file.InPath)
+
+	inPipe, err := cmd.StdinPipe()
+	if err != nil {
+		return nil, err
+	}
+	outPipe, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+	errPipe, err := cmd.StderrPipe()
+	if err != nil {
+		return nil, err
+	}
+
+
+	go func() {
+		defer inPipe.Close()
+		f, _ := os.Open(file.InPath)
+		defer f.Close()
+		sc := bufio.NewScanner(f)
+		doPrint := false
+		for sc.Scan() {
+			line := sc.Text()
+			if doPrint {
+				io.WriteString(inPipe, line + "\n")
+			}
+			if line == "----" {
+				doPrint = true
+			}
+		}
+		io.Copy(inPipe, f)
+	}()
+
+	fmt.Fprintln(os.Stderr, "stdout")
+
+	var out []byte = nil
+	go func() {
+		out, _ = io.ReadAll(outPipe)
+	}()
+
+	fmt.Fprintln(os.Stderr, "stderr")
+
+	var cmdErr []byte = nil
+	go func() {
+		cmdErr, _ = io.ReadAll(errPipe)
+	}()
+
+	if err := cmd.Start(); err != nil {
+		return nil, err
+	}
+
+	if err := cmd.Wait(); err != nil {
+		return nil, fmt.Errorf("%s\nstderr: %s\n", err, string(cmdErr))
+	}
+	return out, nil
+}