alpineでAndroidアプリをビルドするイメージを作成

Docker

やったこと

以下を参考にDockerfileを作成

Androidのビルド用Dockerイメージダイエット計画 - dely tech blog Androidアプリのビルド環境Dockerイメージ制作 - Qiita DockerでAndroidアプリのビルド環境を作る - Qiita

• Android SDKをインストールしたコンテナを公開してしまうとライセンス違反になるので公開はしない
• ベースイメージはalpineをつかいサイズを小さくする

glibcをインストール

sgerrand/alpine-pkg-glibc: A glibc compatibility layer package for Alpine Linux

wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub
wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.35-r0/glibc-2.35-r0.apk
apk add glibc-2.35-r0.apk

localeの指定が必要ならglibc-i18nを入れる

wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.35-r0/glibc-bin-2.35-r0.apk
wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.35-r0/glibc-i18n-2.35-r0.apk
apk add glibc-bin-2.35-r0.apk glibc-i18n-2.35-r0.apk
/usr/glibc-compat/bin/localedef -i en_US -f UTF-8 en_US.UTF-8

Dockerfileは、alpineにglibcをインストールしたイメージ https://hub.docker.com/r/frolvlad/alpine-glibc/ を参考にする

docker-alpine-glibc/Dockerfile at master · Docker-Hub-frolvlad/docker-alpine-glibc

ENV LANG=C.UTF-8
 
# install alpine-pkg-glibc apk and set C.UTF-8 locale as default
RUN BASE_URL="https://github.com/sgerrand/alpine-pkg-glibc/releases/download" && \
    VERSION="2.35-r0" && \
    BASE_FILE="glibc-$VERSION.apk" && BIN_FILE="glibc-bin-$VERSION.apk" && I18N_FILE="glibc-i18n-$VERSION.apk" && \
    wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub && \
    wget "$BASE_URL/$VERSION/$BASE_FILE" && wget "$BASE_URL/$VERSION/$BIN_FILE" && wget "$BASE_URL/$VERSION/$I18N_FILE" && \
    apk add --no-cache "$BASE_FILE" "$BIN_FILE" "$I18N_FILE" && \
    rm "/etc/apk/keys/sgerrand.rsa.pub" && \
    /usr/glibc-compat/bin/localedef --force --inputfile POSIX --charmap UTF-8 "$LANG" || true && \
    echo "export LANG=$LANG" > /etc/profile.d/locale.sh && \
    apk del glibc-i18n && \
    rm "/root/.wget-hsts" && \
    apk del .build-dependencies && \
    rm "$BASE_FILE" "$BIN_FILE" "$I18N_FILE"

2.35でバグがあり、/lib64にglibcではなくmuslのまま配置されるので2.34に下げた 2.35-r0: glibc compatibility regression due to removal of /lib64 · Issue #181 · sgerrand/alpine-pkg-glibc · GitHub

完成系

FROM alpine:3.16
 
ARG ANDROID_SDK_TOOLS="8512546"
 
ENV LANG=C.UTF-8
ENV ANDROID_SDK_ROOT=/opt/android-sdk
ENV JAVA_HOME=/usr/local/java-8
ENV PATH=$PATH:${ANDROID_SDK_ROOT}/cmdline-tools/bin:${JAVA_HOME}/bin
 
# 参考 https://github.com/Docker-Hub-frolvlad/docker-alpine-glibc
RUN BASE_URL="https://github.com/sgerrand/alpine-pkg-glibc/releases/download" && \
    VERSION="2.34-r0" && \
    BASE_FILE="glibc-$VERSION.apk" && BIN_FILE="glibc-bin-$VERSION.apk" && I18N_FILE="glibc-i18n-$VERSION.apk" && \
    wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub && \
    wget "$BASE_URL/$VERSION/$BASE_FILE" "$BASE_URL/$VERSION/$BIN_FILE" "$BASE_URL/$VERSION/$I18N_FILE" && \
    apk add --no-cache "$BASE_FILE" "$BIN_FILE" "$I18N_FILE" && \
    rm "/etc/apk/keys/sgerrand.rsa.pub" && \
    /usr/glibc-compat/bin/localedef --force --inputfile POSIX --charmap UTF-8 "$LANG" || true && \
    echo "export LANG=$LANG" > /etc/profile.d/locale.sh && \
    apk del glibc-i18n && \
    rm "$BASE_FILE" "$BIN_FILE" "$I18N_FILE"
 
# Java(Amazon Corretto 17)
RUN mkdir -p $JAVA_HOME && cd $JAVA_HOME && \
    wget https://corretto.aws/downloads/latest/amazon-corretto-17-x64-alpine-jdk.tar.gz && \
    tar -xzf amazon-corretto-17-x64-alpine-jdk.tar.gz --strip-components 1 && \
    rm amazon-corretto-17-x64-alpine-jdk.tar.gz
 
# Android SDK
ENV ANDROID_API_LEVELS=android-29,android-30
ENV ANDROID_BUILD_TOOLS_VERSIONS=29.0.3,30.0.1
RUN FILE=commandlinetools-linux-${ANDROID_SDK_TOOLS}_latest.zip && \
    mkdir -p ${ANDROID_SDK_ROOT} && cd ${ANDROID_SDK_ROOT} && \
    wget https://dl.google.com/android/repository/${FILE} && \
    unzip ${FILE} && rm ${FILE} && \
    yes | sdkmanager --licenses > /dev/null && \
    yes | sdkmanager $(echo ${ANDROID_BUILD_TOOLS_VERSIONS} | sed 's/,/\n/g' | sed -E 's/(.+)/build-tools;\1/g' | tr '\n' ' ') "platform-tools" $(echo ${ANDROID_API_LEVELS} | sed 's/,/\n/g' | sed -E 's/(.+)/platforms;\1/g' | tr '\n' ' ')
    
RUN mkdir /workspace
WORKDIR /workspace