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package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"github.com/urfave/cli"
diff "github.com/yudai/gojsondiff"
)
func main() {
app := cli.NewApp()
app.Name = "jd"
app.Usage = "JSON Diff"
app.Version = "0.0.2"
app.Flags = []cli.Flag{}
app.Action = func(c *cli.Context) {
if len(c.Args()) < 2 {
fmt.Println("Not enough arguments.\n")
fmt.Printf("Usage: %s diff json_file\n", app.Name)
os.Exit(1)
}
diffFilePath := c.Args()[0]
jsonFilePath := c.Args()[1]
// Diff file
diffFile, err := ioutil.ReadFile(diffFilePath)
if err != nil {
fmt.Printf("Failed to open file '%s': %s\n", diffFilePath, err.Error())
os.Exit(2)
}
// Load Diff file
um := diff.NewUnmarshaller()
diffObject, err := um.UnmarshalBytes(diffFile)
if err != nil {
fmt.Printf("Failed to load diff file '%s': %s\n", diffFilePath, err.Error())
os.Exit(2)
}
// JSON file
jsonFile, err := ioutil.ReadFile(jsonFilePath)
if err != nil {
fmt.Printf("Failed to open file '%s': %s\n", jsonFilePath, err.Error())
os.Exit(2)
}
// Load JSON
var jsonObject map[string]interface{}
json.Unmarshal(jsonFile, &jsonObject)
// Apply
differ := diff.New()
differ.ApplyPatch(jsonObject, diffObject)
pachedJson, _ := json.MarshalIndent(jsonObject, "", " ")
fmt.Println(string(pachedJson))
}
app.Run(os.Args)
}
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