golang markdown-cli

markdown-cli.go

package main
import (
    "io/ioutil"
    "bytes"
    "fmt"
    "os"
    "github.com/yuin/goldmark"
    "github.com/yuin/goldmark/extension"
    "github.com/yuin/goldmark/parser"
    "github.com/yuin/goldmark/renderer/html"
)

func main() {
    // find filename from args and show usage
    if(len(os.Args) != 2) {
        fmt.Println("Usage: markdown filename.md")
        os.Exit(1)
    }

    // read file
    source, err := ioutil.ReadFile(os.Args[1]);
    if err != nil {
        panic(err)
    }

    // parse file
    md := goldmark.New(
        goldmark.WithExtensions(
                extension.GFM,
                extension.Footnote,
                extension.Typographer,
                extension.DefinitionList,
        ),
        goldmark.WithParserOptions(
            parser.WithAutoHeadingID(),
        ),
        goldmark.WithRendererOptions(
            html.WithXHTML(),
            html.WithUnsafe(),
        ),
    )
    var buf bytes.Buffer
    if err := md.Convert(source, &buf); err != nil {
        panic(err)
    }

    // print parsed file
    fmt.Print(buf.String())
}