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main.go
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main.go
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package main
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"os"
"strings"
"github.com/alecthomas/chroma"
"github.com/alecthomas/chroma/formatters/html"
"github.com/alecthomas/chroma/lexers"
"github.com/alecthomas/chroma/styles"
"github.com/niklasfasching/go-org/org"
)
func main() {
log := log.New(os.Stderr, "", 0)
if len(os.Args) < 3 {
log.Println("USAGE: org FILE OUTPUT_FORMAT")
log.Fatal("Supported output formats: org, html, html-chroma")
}
path := os.Args[1]
bs, err := ioutil.ReadFile(path)
if err != nil {
log.Fatal(err)
}
out, err := "", nil
d := org.New().Parse(bytes.NewReader(bs), path)
switch strings.ToLower(os.Args[2]) {
case "org":
out, err = d.Write(org.NewOrgWriter())
case "html":
out, err = d.Write(org.NewHTMLWriter())
case "html-chroma":
writer := org.NewHTMLWriter()
writer.HighlightCodeBlock = highlightCodeBlock
out, err = d.Write(writer)
default:
log.Fatal("Unsupported output format")
}
if err != nil {
log.Fatal(err)
}
fmt.Fprint(os.Stdout, out)
}
func highlightCodeBlock(source, lang string) string {
var w strings.Builder
l := lexers.Get(lang)
if l == nil {
l = lexers.Fallback
}
l = chroma.Coalesce(l)
it, _ := l.Tokenise(nil, source)
_ = html.New().Format(&w, styles.Get("friendly"), it)
return `<div class="highlight">` + "\n" + w.String() + "\n" + `</div>`
}