Initial commit

cmd/root.go

@@ -0,0 +1,61 @@
+package cmd
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+
+	"github.com/jonyhy96/replacer/pkg/replacer"
+	"github.com/jonyhy96/replacer/pkg/utils/file"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+func init() {
+	rootCmd.Flags().StringP("file", "f", "", "the replace file filepath e.g. ./keys.json")
+	rootCmd.Flags().StringP("work", "w", "", "the work path of files you want to replace")
+	rootCmd.Flags().StringVar(&fileType, "t", "", "the type of your replace file(default is json)")
+	rootCmd.MarkFlagRequired("file")
+	rootCmd.MarkFlagRequired("path")
+	viper.SetDefault("author", "jonyhy <github/jonyhy96>")
+}
+
+var (
+	fileType        = ""
+	defaultFileType = "json"
+	rootCmd         = &cobra.Command{
+		Use:     "replacer",
+		Short:   "replacer eplace things for you\n",
+		Version: "1.0.0",
+		Run: func(cmd *cobra.Command, args []string) {
+			filePath, _ := cmd.Flags().GetString("file")
+			workPath, _ := cmd.Flags().GetString("work")
+			filepath.Walk(workPath, func(path string, info os.FileInfo, err error) error {
+				if info.IsDir() {
+					return nil
+				}
+				if fileType == "" {
+					replaceMap, err := file.New(defaultFileType).Transform(filePath)
+					if err != nil {
+						log.Fatalln(err)
+					}
+					file, _ := os.OpenFile(filePath, os.O_RDWR, 0644) // omite error because of already under walk.
+					err = replacer.New(defaultFileType, replaceMap).Replace(file, file)
+					if err != nil {
+						log.Fatalln(err)
+					}
+				}
+				return nil
+			})
+		},
+	}
+)
+
+// Execute command
+func Execute() {
+	if err := rootCmd.Execute(); err != nil {
+		log.Fatalln(err)
+		os.Exit(1)
+	}
+}

go.mod

@@ -0,0 +1,8 @@
+module github.com/jonyhy96/replacer
+
+go 1.13
+
+require (
+	github.com/spf13/cobra v0.0.5
+	github.com/spf13/viper v1.4.0
+)

go.sum

@@ -0,0 +1,150 @@
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main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"github.com/jonyhy96/replacer/cmd"
+)
+
+func main() {
+	cmd.Execute()
+}

pkg/replacer/json.go

@@ -0,0 +1,50 @@
+package replacer
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"strconv"
+	"strings"
+)
+
+var (
+	// ErrorUnknownType handles unknown types error.
+	ErrorUnknownType = errors.New("unknown type")
+)
+
+// JSON handles json format replace file.
+type JSON struct {
+	replace map[string]interface{}
+}
+
+// Replace replace all matched string of in by replace.key and write to out.
+func (j *JSON) Replace(in io.Reader, out io.Writer) error {
+	inBytes, err := ioutil.ReadAll(in)
+	result := string(inBytes)
+	if err != nil {
+		return fmt.Errorf("ioutil.ReadAll %w", err)
+	}
+	for key, value := range j.replace {
+		result = strings.ReplaceAll(result, key, interface2string(value))
+	}
+	_, err = out.Write([]byte(result))
+	if err != nil {
+		return fmt.Errorf("write to out %w", err)
+	}
+	return nil
+}
+
+func interface2string(in interface{}) string {
+	if val, ok := in.(string); ok {
+		return val
+	}
+	if val, ok := in.(int); ok {
+		return strconv.Itoa(val)
+	}
+	if val, ok := in.(float64); ok {
+		return strconv.FormatFloat(val, 'E', -1, 64)
+	}
+	return ErrorUnknownType.Error()
+}

pkg/replacer/replacer.go

@@ -0,0 +1,20 @@
+package replacer
+
+import "io"
+
+// Replacer replace something of the file.
+type Replacer interface {
+	Replace(in io.Reader, out io.Writer) error
+}
+
+// New creates a new Replacer based on replacer file's type.
+func New(fileType string, filecontent interface{}) Replacer {
+	switch fileType {
+	case "json":
+		return &JSON{
+			replace: filecontent.(map[string]interface{}),
+		}
+	default:
+		return &JSON{}
+	}
+}

pkg/utils/file/file.go

@@ -0,0 +1,16 @@
+package file
+
+// Transformer transforms file to builtin.
+type Transformer interface {
+	Transform(filename string) (map[string]interface{}, error)
+}
+
+// New creates a new Transformer.
+func New(fileType string) Transformer {
+	switch fileType {
+	case "json":
+		return &JSON{}
+	default:
+		return &JSON{}
+	}
+}

pkg/utils/file/json.go

@@ -0,0 +1,25 @@
+package file
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+)
+
+// JSON handles transform json file to map.
+type JSON struct {
+}
+
+// Transform implements Transformer.Transform
+func (j JSON) Transform(filename string) (map[string]interface{}, error) {
+	var result map[string]interface{}
+	fileBytes, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil, fmt.Errorf("ioutil.ReadFile %w", err)
+	}
+	err = json.Unmarshal(fileBytes, &result)
+	if err != nil {
+		return nil, fmt.Errorf("json.Unmarsha %w", err)
+	}
+	return result, nil
+}