mirror of https://git.jolheiser.com/nixfig.git
71 lines
1.2 KiB
Go
71 lines
1.2 KiB
Go
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package main
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import (
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"os"
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"strings"
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"github.com/pelletier/go-toml/v2"
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"go.jolheiser.com/nixfig"
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"gopkg.in/yaml.v3"
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)
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func maine() error {
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fs := flag.NewFlagSet("nixgen", flag.ExitOnError)
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format := func(v any) ([]byte, error) {
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return json.MarshalIndent(v, "", "\t")
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}
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formatFunc := func(s string) error {
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switch strings.ToLower(s) {
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case "json":
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// Default
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case "yaml":
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format = yaml.Marshal
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case "toml":
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format = toml.Marshal
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default:
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return fmt.Errorf("unknown format %q, should be one of [json yaml toml]", s)
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}
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return nil
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}
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fs.Func("format", "Output format", formatFunc)
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fs.Func("f", "--format", formatFunc)
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if err := fs.Parse(os.Args[1:]); err != nil {
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return err
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}
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if len(fs.Args()) < 1 {
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return errors.New("nixgen requires a file")
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}
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fp := fs.Arg(0)
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data, err := os.ReadFile(fp)
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if err != nil {
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return err
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}
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var nix map[string]any
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if err := nixfig.Unmarshal(data, &nix); err != nil {
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return err
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}
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out, err := format(nix)
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if err != nil {
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return err
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}
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fmt.Println(string(out))
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return nil
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}
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func main() {
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if err := maine(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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