Added command line util to call linter

cmd/gojson.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+
+	"gitea.paas.celticinfo.fr/oabrivard/gojson/linter"
+)
+
+func isInputFromPipe() bool {
+	fileInfo, _ := os.Stdin.Stat()
+	return fileInfo.Mode()&os.ModeCharDevice == 0
+}
+
+func main() {
+	var f *os.File
+
+	if isInputFromPipe() {
+		f = os.Stdin
+
+	} else {
+		fileName := ""
+
+		if len(os.Args) != 2 {
+			fmt.Fprintf(os.Stderr, "gojson filename\n")
+			os.Exit(1)
+		} else {
+			fileName = os.Args[1]
+		}
+
+		var err error
+		f, err = os.Open(fileName)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "error: %v\n", err)
+			os.Exit(1)
+		}
+		defer f.Close()
+	}
+
+	bytes, err := io.ReadAll(f)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		os.Exit(1)
+	}
+
+	jl := linter.NewJsonLinter(string(bytes))
+	result, err := jl.Lint()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		os.Exit(1)
+	}
+
+	fmt.Println(result)
+}