Bruno FERNANDO
84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// Tomll is a linter for TOML
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//
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// Usage:
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// cat file.toml | tomll > file_linted.toml
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// tomll file1.toml file2.toml # lint the two files in place
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package main
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import (
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"bytes"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"github.com/pelletier/go-toml"
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)
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func main() {
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multiLineArray := flag.Bool("multiLineArray", false, "sets up the linter to encode arrays with more than one element on multiple lines instead of one.")
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flag.Usage = func() {
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fmt.Fprintln(os.Stderr, "tomll can be used in two ways:")
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fmt.Fprintln(os.Stderr, "Writing to STDIN and reading from STDOUT:")
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fmt.Fprintln(os.Stderr, " cat file.toml | tomll > file.toml")
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fmt.Fprintln(os.Stderr, "")
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fmt.Fprintln(os.Stderr, "Reading and updating a list of files:")
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fmt.Fprintln(os.Stderr, " tomll a.toml b.toml c.toml")
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fmt.Fprintln(os.Stderr, "")
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fmt.Fprintln(os.Stderr, "When given a list of files, tomll will modify all files in place without asking.")
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fmt.Fprintln(os.Stderr, "When given a list of files, tomll will modify all files in place without asking.")
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fmt.Fprintln(os.Stderr, "")
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fmt.Fprintln(os.Stderr, "Flags:")
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fmt.Fprintln(os.Stderr, "-multiLineArray sets up the linter to encode arrays with more than one element on multiple lines instead of one.")
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}
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flag.Parse()
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// read from stdin and print to stdout
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if flag.NArg() == 0 {
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s, err := lintReader(os.Stdin, *multiLineArray)
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if err != nil {
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io.WriteString(os.Stderr, err.Error())
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os.Exit(-1)
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}
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io.WriteString(os.Stdout, s)
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} else {
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// otherwise modify a list of files
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for _, filename := range flag.Args() {
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s, err := lintFile(filename, *multiLineArray)
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if err != nil {
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io.WriteString(os.Stderr, err.Error())
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os.Exit(-1)
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}
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ioutil.WriteFile(filename, []byte(s), 0644)
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}
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}
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}
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func lintFile(filename string, multiLineArray bool) (string, error) {
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tree, err := toml.LoadFile(filename)
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if err != nil {
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return "", err
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}
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buf := new(bytes.Buffer)
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if err := toml.NewEncoder(buf).ArraysWithOneElementPerLine(multiLineArray).Encode(tree); err != nil {
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panic(err)
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}
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return buf.String(), nil
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}
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func lintReader(r io.Reader, multiLineArray bool) (string, error) {
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tree, err := toml.LoadReader(r)
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if err != nil {
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return "", err
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}
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buf := new(bytes.Buffer)
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if err := toml.NewEncoder(buf).ArraysWithOneElementPerLine(multiLineArray).Encode(tree); err != nil {
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panic(err)
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}
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return buf.String(), nil
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}
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