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November 28, 2021 06:30
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A Json pretty printer written in golang.
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//Build with: go build ./jsonpp.go | |
package main | |
import "encoding/json" | |
import "fmt" | |
import "io/ioutil" | |
import "os" | |
func main() { | |
if len(os.Args) != 2 { | |
fmt.Println("One argument, the json file to pretty-print is required") | |
os.Exit(-1) | |
} | |
fileName := os.Args[1] | |
byt, err := ioutil.ReadFile(fileName) | |
if err != nil { | |
panic(err) | |
} | |
var dat map[string] interface{} | |
if err := json.Unmarshal(byt, &dat); err != nil { | |
panic(err) | |
} | |
b, err := json.MarshalIndent(dat, "", " ") | |
if err != nil { | |
panic(err) | |
} | |
b2 := append(b, '\n') | |
os.Stdout.Write(b2) | |
} |
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Wow, blast from the past. :)
https://golang.org/pkg/encoding/json/#Indent
https://golang.org/pkg/encoding/json/#example_Indent