Merge pull request #1 from bmorton/add-regexp-support

Add regexp support via --regexp flag

cmd/replace.go

@@ -32,6 +32,10 @@ var ReplaceCommand = &cli.Command{
 			Name:  "dry-run",
 			Usage: "output changed files to stdout instead of committing",
 		},
+		&cli.BoolFlag{
+			Name:  "regexp",
+			Usage: "enable regular expression mode for find string",
+		},
 		&cli.StringFlag{
 			Name:     "title",
 			Usage:    "title for pull request",
@@ -88,6 +92,7 @@ func replaceAction(ctx *cli.Context) error {
 	rep.Find = ctx.String("find")
 	rep.Replace = ctx.String("replace")
 	rep.Limit = ctx.Int("limit")
+	rep.Regexp = ctx.Bool("regexp")
 
 	return rep.Run(ctx.Context)
 }

replacer/main.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"github.com/google/go-github/v48/github"
+	"regexp"
 	"strings"
 	"time"
 )
@@ -18,13 +19,15 @@ type Replacer struct {
 	BaseBranch      string
 	TargetBranch    string
 	Path            string
+	Mode            string
 	Find            string
 	Replace         string
 	Limit           int
 	Title           string
 	Description     string
 	DryRun          bool
 	SkipPullRequest bool
+	Regexp          bool
 	gh              *github.Client
 }
 
@@ -173,7 +176,17 @@ func (r Replacer) generateContent(ctx context.Context) (string, error) {
 		return "", err
 	}
 
-	newContent := strings.Replace(content, r.Find, r.Replace, r.Limit)
+	if strings.TrimSpace(content) == "" {
+		return "", fmt.Errorf("file %s is empty", r.Path)
+	}
+
+	var newContent string
+	if r.Regexp {
+		sampleRegexp := regexp.MustCompile(r.Find)
+		newContent = sampleRegexp.ReplaceAllString(content, r.Replace)
+	} else {
+		newContent = strings.Replace(content, r.Find, r.Replace, r.Limit)
+	}
 
 	if newContent == content {
 		return "", ErrNoContentChange