feat: precache gradle

Dockerfile

@@ -28,10 +28,13 @@ RUN apt-get update \
         openjdk-17-jdk-headless \
         unzip \
     && rm -rf /var/lib/apt/lists/*
+RUN curl -Lo /gradle.zip \
+    'https://services.gradle.org/distributions/gradle-8.12.1-bin.zip'
 COPY --from=build /opt/ /opt/
 ENV PATH="/opt/flutter/bin:$PATH"
 RUN flutter config --android-sdk /opt/android-sdk/
-RUN yes | flutter doctor --android-licenses
 RUN flutter precache --android
+RUN yes | flutter doctor --android-licenses
+COPY entrypoint.sh /usr/local/bin/
 WORKDIR /app/
-ENTRYPOINT ["flutter", "--no-version-check"]
+ENTRYPOINT ["entrypoint.sh"]

README.md

@@ -0,0 +1,14 @@
+# docker-flutter
+## Examples
+- Run
+```bash
+docker volume create --ignore fluttercache
+docker run --rm --network host -v "$PWD:/app/" -v "fluttercache:/home/gradle/.gradle/" git.gmoker.com/icing/flutter:main run
+```
+
+- Build
+```bash
+docker volume create --ignore fluttercache
+docker run --rm -v "$PWD:/app/" -v "fluttercache:/home/gradle/.gradle/" git.gmoker.com/icing/flutter:main build apk
+```
+The apk files will be found in `./build/app/outputs/flutter-apk/`.

entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/bash -e
+
+cp -r . /app.tmp/
+cd /app.tmp/
+sed -i '/^distributionUrl/s =.\+ =file\\:///gradle.zip ' \
+    android/gradle/wrapper/gradle-wrapper.properties
+
+flutter --no-version-check "$@"
+
+cd -
+cp -r /app.tmp/build/ .