Fix stage task detection to work regardless of description presence (#177)

Author: Malax

CHANGELOG.md

@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Fixed
+
+- Fix `stage` task detection to work regardless of whether task has a description. ([#177](https://github.com/heroku/heroku-buildpack-gradle/pull/177))
 
 ## [v47] - 2025-09-16
 

bin/compile

@@ -199,7 +199,7 @@ echo "${detected_app_framework}" >"${BUILD_DIR}/.heroku/gradle_buildpack_detecte
 # Determine the Gradle task to execute
 if [ -z "${GRADLE_TASK:-}" ]; then
 	# If a stage task is available, use it instead of trying to guess the task to run
-	if (cd "${BUILD_DIR}" && ./gradlew tasks --all 2>/dev/null | grep -q "^stage "); then
+	if (cd "${BUILD_DIR}" && ./gradlew tasks --all 2>/dev/null | grep -qE "^stage($| )"); then
 		GRADLE_TASK="stage"
 	else
 		case "${detected_app_framework}" in

test/spec/misc_spec.rb

@@ -196,4 +196,41 @@
       )
     end
   end
+
+  it 'uses stage task (with description) when available' do
+    app = Hatchet::Runner.new('spring-3-gradle-8-groovy')
+    app.before_deploy do
+      stage_task = <<~GROOVY
+        task stage {
+            description = 'Custom stage task for deployment'
+            dependsOn build
+        }
+      GROOVY
+
+      File.write('build.gradle', "#{File.read('build.gradle')}\n#{stage_task}")
+    end
+
+    app.deploy do
+      expect(app).to be_deployed
+      expect(clean_output(app.output)).to include('$ ./gradlew stage')
+    end
+  end
+
+  it 'uses stage task (without description) when available' do
+    app = Hatchet::Runner.new('spring-3-gradle-8-groovy')
+    app.before_deploy do
+      stage_task = <<~GROOVY
+        task stage {
+            dependsOn build
+        }
+      GROOVY
+
+      File.write('build.gradle', "#{File.read('build.gradle')}\n#{stage_task}")
+    end
+
+    app.deploy do
+      expect(app).to be_deployed
+      expect(clean_output(app.output)).to include('$ ./gradlew stage')
+    end
+  end
 end