fix(v2): set LANG for pbpaste/pbcopy to prevent clipboard mojibake on macOS (#5012)

Author: veeceey

v2/internal/frontend/desktop/darwin/clipboard.go

@@ -3,11 +3,25 @@
 package darwin
 
 import (
+	"os"
 	"os/exec"
 )
 
+// ensureUTF8Env returns the current environment with LANG set to en_US.UTF-8
+// if it is not already set. This is needed because packaged macOS apps do not
+// inherit the terminal's LANG variable, causing pbpaste/pbcopy to default to
+// an ASCII-compatible encoding that mangles non-ASCII text.
+func ensureUTF8Env() []string {
+	env := os.Environ()
+	if _, ok := os.LookupEnv("LANG"); !ok {
+		env = append(env, "LANG=en_US.UTF-8")
+	}
+	return env
+}
+
 func (f *Frontend) ClipboardGetText() (string, error) {
 	pasteCmd := exec.Command("pbpaste")
+	pasteCmd.Env = ensureUTF8Env()
 	out, err := pasteCmd.Output()
 	if err != nil {
 		return "", err
@@ -17,6 +31,7 @@ func (f *Frontend) ClipboardGetText() (string, error) {
 
 func (f *Frontend) ClipboardSetText(text string) error {
 	copyCmd := exec.Command("pbcopy")
+	copyCmd.Env = ensureUTF8Env()
 	in, err := copyCmd.StdinPipe()
 	if err != nil {
 		return err

website/src/pages/changelog.mdx

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed clipboard mojibake on macOS by setting LANG environment variable for pbpaste/pbcopy operations [#5012](https://github.com/wailsapp/wails/pull/5012) by @veeceey
 - Fixed `wails init` to prevent initialization in non-empty directories when using the `-d` flag, avoiding accidental data loss [`#4940`](https://github.com/wailsapp/wails/issues/4940) by `@leaanthony`
 - Fixed missing `EventsOffAll` in runtime templates for all frontend frameworks [#4883](https://github.com/wailsapp/wails/pull/4883) by @narcilee7
 - Fixed Linux crash on panic in JS-bound Go methods due to WebKit overriding signal handlers [#3965](https://github.com/wailsapp/wails/issues/3965) by @leaanthony