Sergey Filkin
93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io"
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"os"
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"github.com/fserg/md-to-html/internal/version"
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)
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func main() {
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os.Exit(run(os.Args[1:], os.Stdout, os.Stderr))
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}
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func run(args []string, stdout, stderr io.Writer) int {
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if len(args) == 0 {
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printUsage(stdout)
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return 0
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}
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switch args[0] {
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case "-h", "--help", "help":
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printUsage(stdout)
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return 0
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case "serve":
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return runServe(args[1:], stdout)
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case "cli":
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return runCLI(args[1:], stdout, stderr)
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case "version":
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return runVersion(args[1:], stdout, stderr)
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default:
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fmt.Fprintf(stderr, "unknown subcommand %q\n\n", args[0])
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printUsage(stderr)
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return 2
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}
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}
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func runServe(args []string, stdout io.Writer) int {
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fs := flag.NewFlagSet("serve", flag.ContinueOnError)
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fs.SetOutput(io.Discard)
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if err := fs.Parse(args); err != nil {
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return 2
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}
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fmt.Fprintln(stdout, "serve not implemented yet")
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return 0
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}
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func runCLI(args []string, stdout, stderr io.Writer) int {
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fs := flag.NewFlagSet("cli", flag.ContinueOnError)
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fs.SetOutput(io.Discard)
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if err := fs.Parse(args); err != nil {
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return 2
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}
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if fs.NArg() != 1 {
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fmt.Fprintln(stderr, "usage: md-to-html cli <file.md>")
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return 2
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}
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fmt.Fprintf(stdout, "cli not implemented yet: %s\n", fs.Arg(0))
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return 0
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}
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func runVersion(args []string, stdout, stderr io.Writer) int {
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fs := flag.NewFlagSet("version", flag.ContinueOnError)
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fs.SetOutput(io.Discard)
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if err := fs.Parse(args); err != nil {
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return 2
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}
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if fs.NArg() != 0 {
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fmt.Fprintln(stderr, "usage: md-to-html version")
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return 2
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}
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fmt.Fprintln(stdout, version.Version)
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return 0
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}
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func printUsage(w io.Writer) {
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fmt.Fprint(w, `Usage:
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md-to-html serve
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md-to-html cli <file.md>
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md-to-html version
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Commands:
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serve Start the HTTP server stub
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cli Convert a Markdown file stub
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version Print the build version
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`)
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}
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