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Instruction to download custom distribution JDK and install (#500)
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@ -168,6 +168,31 @@ steps:
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- run: java -cp java HelloWorldApp
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```
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If your use-case requires a custom distribution (in the example, alpine-linux is used) or a version that is not provided by setup-java and you want to always install the latest version during runtime, then you can use the following code to auto-download the latest JDK, determine the semver needed for setup-java, and setup-java will take care of the installation and caching on the VM:
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```yaml
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steps:
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- name: fetch latest temurin JDK
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id: fetch_latest_jdk
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run: |
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major_version={{ env.JAVA_VERSION }} # Example 8 or 11 or 17
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cd $RUNNER_TEMP
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response=$(curl -s "https://api.github.com/repos/adoptium/temurin${major_version}-binaries/releases")
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latest_jdk_download_url=$(echo "$response" | jq -r '.[0].assets[] | select(.name | contains("jdk_x64_alpine-linux") and endswith(".tar.gz")) | .browser_download_url')
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curl -Ls "$latest_jdk_download_url" -o java_package.tar.gz
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latest_jdk_json_url=$(jdk_download_url "$response" | jq -r '.[0].assets[] | select(.name | contains("jdk_x64_alpine-linux") and endswith(".tar.gz.json")) | .browser_download_url')
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latest_semver_version=$(curl -sL $latest_jdk_json_url | jq -r 'version.semver')
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echo "java_version=$latest_semver_version" >> "$GITHUB_OUTPUT"
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- uses: actions/setup-java@v3
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with:
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distribution: 'jdkfile'
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jdkFile: ${{ runner.temp }}/java_package.tar.gz
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java-version: {{ steps.fetch_latest_jdk.outputs.java_version }}
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architecture: x64
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- run: java -cp java HelloWorldApp
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```
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## Testing against different Java distributions
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**NOTE:** The different distributors can provide discrepant list of available versions / supported configurations. Please refer to the official documentation to see the list of supported versions.
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```yaml
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