54 lines
876 B
Go
54 lines
876 B
Go
package main
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
)
|
|
|
|
func main() {
|
|
if len(os.Args) < 2 {
|
|
fmt.Printf("usage: jsonpretty input.json [output.json]\n")
|
|
os.Exit(1)
|
|
}
|
|
|
|
buf, err := ioutil.ReadFile(os.Args[1])
|
|
if err != nil {
|
|
fmt.Printf("%v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
var jsmap map[string]interface{}
|
|
if err := json.Unmarshal(buf, &jsmap); err != nil {
|
|
fmt.Printf("%v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
for key, val := range jsmap {
|
|
switch tval := val.(type) {
|
|
case map[string]interface{}:
|
|
if len(tval) == 0 {
|
|
delete(jsmap, key)
|
|
}
|
|
case []interface{}:
|
|
if len(tval) == 0 {
|
|
delete(jsmap, key)
|
|
}
|
|
}
|
|
}
|
|
|
|
buf, err = json.MarshalIndent(jsmap, "", "\t")
|
|
if err != nil {
|
|
fmt.Printf("%v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
buf = append(buf, '\n')
|
|
|
|
if len(os.Args) == 3 {
|
|
ioutil.WriteFile(os.Args[2], buf, 0666)
|
|
} else {
|
|
os.Stdout.Write(buf)
|
|
}
|
|
}
|