--- /dev/null
+// Command tomlv validates TOML documents and prints each key's type.
+package main
+
+import (
+ "flag"
+ "fmt"
+ "log"
+ "os"
+ "path"
+ "strings"
+ "text/tabwriter"
+
+ "github.com/BurntSushi/toml"
+)
+
+var (
+ flagTypes = false
+)
+
+func init() {
+ log.SetFlags(0)
+
+ flag.BoolVar(&flagTypes, "types", flagTypes,
+ "When set, the types of every defined key will be shown.")
+
+ flag.Usage = usage
+ flag.Parse()
+}
+
+func usage() {
+ log.Printf("Usage: %s toml-file [ toml-file ... ]\n",
+ path.Base(os.Args[0]))
+ flag.PrintDefaults()
+
+ os.Exit(1)
+}
+
+func main() {
+ if flag.NArg() < 1 {
+ flag.Usage()
+ }
+ for _, f := range flag.Args() {
+ var tmp interface{}
+ md, err := toml.DecodeFile(f, &tmp)
+ if err != nil {
+ log.Fatalf("Error in '%s': %s", f, err)
+ }
+ if flagTypes {
+ printTypes(md)
+ }
+ }
+}
+
+func printTypes(md toml.MetaData) {
+ tabw := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
+ for _, key := range md.Keys() {
+ fmt.Fprintf(tabw, "%s%s\t%s\n",
+ strings.Repeat(" ", len(key)-1), key, md.Type(key...))
+ }
+ tabw.Flush()
+}