initial commit
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53
src/jehanne/cmd/jsonpretty/jsonpretty.go
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53
src/jehanne/cmd/jsonpretty/jsonpretty.go
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package main
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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)
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func main() {
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if len(os.Args) < 2 {
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fmt.Printf("usage: jsonpretty input.json [output.json]\n")
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os.Exit(1)
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}
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buf, err := ioutil.ReadFile(os.Args[1])
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if err != nil {
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fmt.Printf("%v\n", err)
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os.Exit(1)
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}
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var jsmap map[string]interface{}
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if err := json.Unmarshal(buf, &jsmap); err != nil {
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fmt.Printf("%v\n", err)
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os.Exit(1)
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}
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for key, val := range jsmap {
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switch tval := val.(type) {
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case map[string]interface{}:
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if len(tval) == 0 {
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delete(jsmap, key)
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}
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case []interface{}:
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if len(tval) == 0 {
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delete(jsmap, key)
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}
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}
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}
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buf, err = json.MarshalIndent(jsmap, "", "\t")
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if err != nil {
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fmt.Printf("%v\n", err)
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os.Exit(1)
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}
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buf = append(buf, '\n')
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if len(os.Args) == 3 {
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ioutil.WriteFile(os.Args[2], buf, 0666)
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} else {
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os.Stdout.Write(buf)
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}
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}
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