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chore: shrink datatransferproject/dev image and fix bundled Gradle mismatch #1505

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Merged
simonxander merged 1 commit into from
Jul 13, 2026
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chore: shrink datatransferproject/dev image and fix bundled Gradle mismatch #1505

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23 changes: 17 additions & 6 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,18 +1,29 @@
# Runs the Java/Gradle build and test suite with no local JDK install.
#
# Source is bind-mounted at `docker run` time -- this image is not rebuilt
# per code change. Gradle 6.9.2 (pulled by the wrapper regardless of this
# image's bundled Gradle version) can't parse Java 17 bytecode when
# compiling build.gradle/settings.gradle, so the JDK here is pinned to 11.
# per code change. build.gradle uses the legacy `maven` plugin, removed in
# Gradle 7+, so the build only works under the wrapper-pinned Gradle 6.9.2
# (see gradle/wrapper/gradle-wrapper.properties) -- not whatever `gradle`
# version a base image happens to bundle. The JDK here is pinned to 11
# because that 6.9.2/Groovy-DSL combo can't parse newer bytecode when
# compiling build.gradle/settings.gradle.
#
# The gradle:* image's default GRADLE_USER_HOME is /home/gradle/.gradle --
# mount a named volume there to cache resolved dependencies across runs:
# The wrapper distribution is resolved and cached into an image layer at
# build time (`./gradlew --version` below) rather than left to download on
# first `docker run` -- same version pin, but the image is self-contained
# and works offline. GRADLE_USER_HOME matches the default the gradle:*
# image used, so existing gradle-cache volumes from that image still work.
#
# docker build -t datatransferproject/dev .
# docker run --rm -v "$PWD":/workspace -v gradle-cache:/home/gradle/.gradle datatransferproject/dev
FROM gradle:8.10.2-jdk11
FROM eclipse-temurin:11-jdk-jammy

ENV GRADLE_USER_HOME=/home/gradle/.gradle
WORKDIR /workspace

COPY gradlew gradlew
COPY gradle/wrapper gradle/wrapper
RUN ./gradlew --version --no-daemon

ENTRYPOINT ["./gradlew"]
CMD ["--no-daemon", "check"]
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