ci: trim variable and ignore empty string

.github/workflows/release.yaml

@@ -87,7 +87,7 @@ jobs:
       - name: Push to GitHub
         run: |
           file='android/fastlane/metadata/android/%s/changelogs/${{ needs.check-version.outputs.build_code }}.txt'
-          printf "$file" "en-US"
+          printf "Source file: $file\n" "en-US"
 
           printf '%s\n' "$(cat <<EOF
           ${{ needs.get-release.outputs.changelog }}

android/fastlane/translate-changelog.sh

@@ -17,6 +17,21 @@ set -eo pipefail
 # Supported languages:
 # - zh-TW Traditional Chinese
 
+#######################################
+# Trim leading and trailing whitespace
+# Usage:
+#   trim_string "   example   string    "
+# Arguments:
+#   $1: The string to trim
+# Outputs:
+#   The trimmed string
+#######################################
+function trim_string() {
+    : "${1#"${1%%[![:space:]]*}"}"
+    : "${_%"${_##*[![:space:]]}"}"
+    printf '%s' "$_"
+}
+
 function main() {
   local changelogFile="$1" googleApiKey="$2" languages="
 zh-TW Traditional Chinese
@@ -25,6 +40,11 @@ zh-TW Traditional Chinese
   changelog="$(cat "$(printf "$changelogFile" 'en-US')")"
 
   while IFS= read -r lang; do
+    lang="$(trim_string "$lang")"
+    if [ -z "$lang" ]; then
+      continue
+    fi
+
     local langCode langName prompt changelog
     langCode="$(echo "$lang" | cut -d' ' -f1)"
     langName="$(echo "$lang" | cut -d' ' -f2-)"

android/fastlane/translate-prompt.txt

@@ -1,4 +1,4 @@
 Translate the following product changelog from English to %s.
 Ensuring that each bullet point maintains the same prefix.
 You should not give me any other information or anything prefix.
-Thank you very much.
+Thank you.