Add a toml linter (#74)
* Add a toml linter
* Use if/else instead of os.Exit(0)
* Add usage warning about destructive changes
diff --git a/cmd/tomll/main.go b/cmd/tomll/main.go
new file mode 100644
index 0000000..f185c56
--- /dev/null
+++ b/cmd/tomll/main.go
@@ -0,0 +1,61 @@
+package main
+
+import (
+ "flag"
+ "fmt"
+ "io"
+ "io/ioutil"
+ "os"
+
+ "github.com/pelletier/go-toml"
+)
+
+func main() {
+ flag.Usage = func() {
+ fmt.Fprintln(os.Stderr, `tomll can be used in two ways:
+Writing to STDIN and reading from STDOUT:
+ cat file.toml | tomll > file.toml
+
+Reading and updating a list of files:
+ tomll a.toml b.toml c.toml
+
+When given a list of files, tomll will modify all files in place without asking.
+`)
+ }
+ flag.Parse()
+ // read from stdin and print to stdout
+ if flag.NArg() == 0 {
+ s, err := lintReader(os.Stdin)
+ if err != nil {
+ io.WriteString(os.Stderr, err.Error())
+ os.Exit(-1)
+ }
+ io.WriteString(os.Stdout, s)
+ } else {
+ // otherwise modify a list of files
+ for _, filename := range flag.Args() {
+ s, err := lintFile(filename)
+ if err != nil {
+ io.WriteString(os.Stderr, err.Error())
+ os.Exit(-1)
+ }
+ ioutil.WriteFile(filename, []byte(s), 0644)
+ }
+ }
+}
+
+func lintFile(filename string) (string, error) {
+ tree, err := toml.LoadFile(filename)
+ if err != nil {
+ return "", err
+ }
+ return tree.String(), nil
+}
+
+func lintReader(r io.Reader) (string, error) {
+ tree, err := toml.LoadReader(r)
+ if err != nil {
+ return "", err
+ }
+ return tree.String(), nil
+}
