implement minimal kew

1 files changed, 109 insertions, 5 deletions

diff --git a/kew.go b/kew.go
index c9652e0..520fe61 100644
--- a/kew.go
+++ b/kew.go
@@ -2,18 +2,122 @@ package main
 
 import (
 	"fmt"
+	"io"
 	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
 )
 
+func md_to_html(input_path string, output_path string) error {
+	var cmd *exec.Cmd
+	var err error
+
+	/* open source markdown */
+	var in *os.File
+	in, err = os.Open(input_path)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+
+	/* create output html */
+	var out *os.File
+	out, err = os.Create(output_path)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	/*
+		run:
+		  lowdown -Thtml
+		stdin  <-  markdown file
+		stdout ->  html file
+	*/
+	cmd = exec.Command("lowdown", "-Thtml")
+	cmd.Stdin = in
+	cmd.Stdout = out
+	cmd.Stderr = os.Stderr
+
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func copy_file(src string, dst string) error {
+	var err error
+
+	var in *os.File
+	in, err = os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+
+	var out *os.File
+	out, err = os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	_, err = io.Copy(out, in)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func main() {
+	var err error
+
 	if len(os.Args) != 3 {
-		fmt.Fprintf(os.Stderr, "usage: kew in/ out/\n")
+		fmt.Fprintf(os.Stderr, "usage: kew <in> <out>\n")
 		os.Exit(1)
 	}
 
-	src := os.Args[1]
-	out := os.Args[2]
+	var src string = os.Args[1]
+	var out string = os.Args[2]
+
+	fmt.Printf("kew: %s -> %s\n", src, out)
+
+	err = filepath.WalkDir(src, func(path string, entry os.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+
+		/* find relative path */
+		var rel string
+		rel, err = filepath.Rel(src, path)
+		if err != nil {
+			return err
+		}
+
+		var outpath string = filepath.Join(out, rel)
+
+		/* mirror src */
+		if entry.IsDir() {
+			return os.MkdirAll(outpath, 0755)
+		}
+
+		/* convert markdown else copy */
+		if strings.HasSuffix(path, ".md") {
+			outpath = strings.TrimSuffix(outpath, ".md") + ".html"
+			return md_to_html(path, outpath)
+		}
+
+		return copy_file(path, outpath)
+	})
+
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "kew:", err)
+		os.Exit(1)
+	}
 
-	fmt.Println("src:", src)
-	fmt.Println("out:", out)
+	fmt.Println("kew: done")
 }