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Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly integrated with the Java platform. It thus allows you to run Python on any Java platform.

There is a newer version: 2.7.4

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# Test launcher for Jython 2.7 (GitHub action)

# The motivation for the test was the mis-handling of JVM arguments
# in jython.py, but we take this excuse to run a few tests on macOS,
# where we don't currently run the regression test in full.

name: launcher test 2.7

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

permissions:
  contents: read

jobs:

  launcher-test-macos-jdk8:

    runs-on: macos-12 # macos-latest (now >12) no longer installs Java 8
                      # Options at https://github.com/actions/runner-images

    steps:
    - run: echo "Branch ${{ github.ref }} of repository ${{ github.repository }}."

    # Some tests require exactly-expected line endings
    - run: git config --global core.autocrlf input

    - uses: actions/checkout@v4

    - name: Set up JDK 8
      uses: actions/setup-java@v4
      with:
        java-version: '8'
        distribution: 'temurin'

    # We have to install Python 2.7 explicitly
    # Simplified from https://github.com/LizardByte/setup-python-action specialised for MacOS
    - name: Set up Python 2
      shell: bash
      run: |
        python -V
        # Install using pyenv
        brew install pyenv
        export PATH="$(pyenv root)/shims:$(pyenv root)/bin:$PATH"
        pyenv install 2.7.18
        pyenv global 2.7.18

        # Get a 2.7 virtual environment
        python -m pip install virtualenv
        venv="/tmp/python27/venv"
        python -m virtualenv ${venv}
        source ${venv}/bin/activate

        # Check we got the version we hoped for
        echo "${venv}/bin" >> $GITHUB_PATH
        python -V

    - name: Build with Ant
      run: ant -noinput -buildfile build.xml

    - name: Show JVM arguments when launched by script
      run: dist/bin/jython -c 'from java.lang.management import ManagementFactory; print ManagementFactory.getRuntimeMXBean().getInputArguments()'

    - name: Show JVM arguments when launched by Python
      run: |
          python -V
          python dist/bin/jython.py -c 'from java.lang.management import ManagementFactory; print ManagementFactory.getRuntimeMXBean().getInputArguments()'

    - name: Regression tests for invocation of the interpreter with various command line arguments
      run: dist/bin/jython -m test.test_cmd_line

    - name: Regression tests for command line execution of scripts
      run: |
          python -V
          python dist/bin/jython.py -m test.test_cmd_line_script

    - name: Run Java tests with Ant
      run: ant javatest-ci