133 lines
2.1 KiB
Go
133 lines
2.1 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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"git.wntrmute.dev/kyle/goutils/lib"
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)
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func prettify(file string, validateOnly bool) error {
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var in []byte
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var err error
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if file == "-" {
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in, err = ioutil.ReadAll(os.Stdin)
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} else {
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in, err = ioutil.ReadFile(file)
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}
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if err != nil {
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lib.Warn(err, "ReadFile")
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return err
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}
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var buf = &bytes.Buffer{}
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err = json.Indent(buf, in, "", " ")
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if err != nil {
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lib.Warn(err, "%s", file)
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return err
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}
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if validateOnly {
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return nil
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}
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if file == "-" {
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_, err = os.Stdout.Write(buf.Bytes())
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} else {
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err = ioutil.WriteFile(file, buf.Bytes(), 0644)
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}
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if err != nil {
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lib.Warn(err, "WriteFile")
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}
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return err
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}
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func compact(file string, validateOnly bool) error {
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var in []byte
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var err error
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if file == "-" {
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in, err = ioutil.ReadAll(os.Stdin)
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} else {
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in, err = ioutil.ReadFile(file)
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}
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if err != nil {
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lib.Warn(err, "ReadFile")
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return err
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}
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var buf = &bytes.Buffer{}
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err = json.Compact(buf, in)
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if err != nil {
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lib.Warn(err, "%s", file)
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return err
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}
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if validateOnly {
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return nil
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}
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if file == "-" {
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_, err = os.Stdout.Write(buf.Bytes())
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} else {
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err = ioutil.WriteFile(file, buf.Bytes(), 0644)
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}
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if err != nil {
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lib.Warn(err, "WriteFile")
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}
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return err
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}
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func usage() {
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progname := lib.ProgName()
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fmt.Printf(`Usage: %s [-h] files...
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%s is used to lint and prettify (or compact) JSON files. The
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files will be updated in-place.
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Flags:
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-c Compact files.
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-h Print this help message.
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-n Don't prettify; only perform validation.
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`, progname, progname)
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}
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func init() {
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flag.Usage = usage
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}
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func main() {
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var shouldCompact, validateOnly bool
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flag.BoolVar(&shouldCompact, "c", false, "Compact files instead of prettifying.")
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flag.BoolVar(&validateOnly, "n", false, "Don't write changes; only perform validation.")
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flag.Parse()
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action := prettify
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if shouldCompact {
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action = compact
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}
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var errCount int
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for _, fileName := range flag.Args() {
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err := action(fileName, validateOnly)
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if err != nil {
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errCount++
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}
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}
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if errCount > 0 {
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lib.Errx(lib.ExitFailure, "Not all files succeeded.")
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}
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}
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