100 lines
2.1 KiB
Go
100 lines
2.1 KiB
Go
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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"github.com/codegangsta/cli"
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diff "github.com/yudai/gojsondiff"
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"github.com/yudai/gojsondiff/formatter"
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)
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func main() {
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app := cli.NewApp()
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app.Name = "jd"
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app.Usage = "JSON Diff"
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app.Version = "0.0.2"
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app.Flags = []cli.Flag{
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cli.StringFlag{
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Name: "format, f",
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Value: "ascii",
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Usage: "Diff Outpu Format (ascii, delta)",
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EnvVar: "DIFF_FORMAT",
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},
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cli.BoolFlag{
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Name: "coloring, c",
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Usage: "Enable coloring in the ASCII mode (not available in the delta mode)",
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EnvVar: "COLORING",
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},
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}
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app.Action = func(c *cli.Context) {
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if len(c.Args()) < 2 {
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fmt.Println("Not enough arguments.\n")
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fmt.Printf("Usage: %s json_file another_json_file\n", app.Name)
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os.Exit(1)
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}
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aFilePath := c.Args()[0]
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bFilePath := c.Args()[1]
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// Prepare your JSON string as `[]byte`, not `string`
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aString, err := ioutil.ReadFile(aFilePath)
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if err != nil {
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fmt.Printf("Failed to open file '%s': %s\n", aFilePath, err.Error())
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os.Exit(2)
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}
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// Another JSON string
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bString, err := ioutil.ReadFile(bFilePath)
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if err != nil {
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fmt.Printf("Failed to open file '%s': %s\n", bFilePath, err.Error())
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os.Exit(2)
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}
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// Then, compare them
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differ := diff.New()
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d, err := differ.Compare(aString, bString)
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if err != nil {
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fmt.Printf("Failed to unmarshal file: %s\n", err.Error())
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os.Exit(3)
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}
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// Output the result
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format := c.String("format")
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var diffString string
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if format == "ascii" {
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var aJson map[string]interface{}
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json.Unmarshal(aString, &aJson)
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config := formatter.AsciiFormatterConfig{
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ShowArrayIndex: true,
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Coloring: c.Bool("coloring"),
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}
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formatter := formatter.NewAsciiFormatter(aJson, config)
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diffString, err = formatter.Format(d)
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if err != nil {
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// No error can occur
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}
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} else if format == "delta" {
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formatter := formatter.NewDeltaFormatter()
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diffString, err = formatter.Format(d)
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if err != nil {
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// No error can occur
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}
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} else {
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fmt.Printf("Unknown Foramt %s\n", format)
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os.Exit(4)
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}
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fmt.Print(diffString)
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}
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app.Run(os.Args)
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}
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