Add android-builder wrapper command

lib/commands/build.sh

@@ -22,5 +22,8 @@ if [ -f ./gradlew ]; then
 else
   echo "Error: ./gradlew is missing."
   echo "This project needs the vendored Gradle wrapper generated by android-builder new."
+  echo
+  echo "If this is an existing project, regenerate it with:"
+  echo "  android-builder new <ProjectName>"
   exit 1
 fi

lib/commands/export.sh

@@ -12,6 +12,9 @@ if [ ! -f "$APK" ]; then
   echo
   echo "Run:"
   echo "  android-builder build"
+  echo
+  echo "If build fails because ./gradlew is missing, regenerate the project with:"
+  echo "  android-builder new <ProjectName>"
   exit 1
 fi
 

lib/commands/help.sh

@@ -7,6 +7,7 @@ echo "Usage:"
 echo "  android-builder setup"
 echo "  android-builder doctor"
 echo "  android-builder new MyApp"
+echo "  android-builder wrapper"
 echo "  android-builder new MyApp --template empty"
 echo "  android-builder build"
 echo "  android-builder export"

lib/commands/wrapper.sh

@@ -0,0 +1,17 @@
+#!/data/data/com.termux/files/usr/bin/bash
+set -e
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+source "$ROOT_DIR/lib/common.sh"
+
+if [ -f settings.gradle ] || [ -f build.gradle ] || [ -f app/build.gradle ]; then
+  install_gradle_wrapper_assets "."
+  echo "Gradle wrapper installed."
+  echo
+  echo "Next:"
+  echo "  ./gradlew assembleDebug"
+else
+  echo "Error: run this command from the root of an Android project."
+  echo "Expected files like settings.gradle, build.gradle, or app/build.gradle."
+  exit 1
+fi