[3.8] bpo-43811: Test multiple OpenSSL versions on GHA (GH-25360) (GH-25392)

The new checks are only executed when one or more OpenSSL-related files are modified. The checks run a handful of networking and hashing test suites. All SSL checks are optional. This PR also introduces ccache to speed up compilation. In common cases it speeds up configure and compile time from about 90 seconds to less than 30 seconds.

Signed-off-by: Christian Heimes <christian@python.org>
(cherry picked from commit 8fa1489365e7af8b90286c97db55a2dc60a05cde)


Co-authored-by: Christian Heimes <christian@python.org>

Automerge-Triggered-By: GH:tiran

2 files changed, 62 insertions, 2 deletions

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 71b36e9..90d0317 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,6 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     outputs:
       run_tests: ${{ steps.check.outputs.run_tests }}
+      run_ssl_tests: ${{ steps.check.outputs.run_ssl_tests }}
     steps:
       - uses: actions/checkout@v2
       - name: Check for source changes
@@ -23,6 +24,7 @@ jobs:
         run: |
           if [ -z "$GITHUB_BASE_REF" ]; then
             echo '::set-output name=run_tests::true'
+            echo '::set-output name=run_ssl_tests::true'
           else
             git fetch origin $GITHUB_BASE_REF --depth=1
             # git diff "origin/$GITHUB_BASE_REF..." (3 dots) may be more
@@ -39,6 +41,7 @@ jobs:
             #
             # https://github.com/python/core-workflow/issues/373
             git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qvE '(\.rst$|^Doc|^Misc)' && echo '::set-output name=run_tests::true' || true
+            git diff --name-only origin/$GITHUB_BASE_REF.. | grep -qE '(ssl|hashlib|hmac|^.github)' && echo '::set-output name=run_ssl_tests::true' || true
           fi
 
   check_abi:
@@ -145,6 +148,11 @@ jobs:
     - uses: actions/checkout@v2
     - name: Install Dependencies
       run: sudo ./.github/workflows/posix-deps-apt.sh
+    - name: Configure OpenSSL env vars
+      run: |
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> $GITHUB_ENV
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> $GITHUB_ENV
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> $GITHUB_ENV
     - name: 'Restore OpenSSL build'
       id: cache-openssl
       uses: actions/cache@v2.1.3
@@ -153,12 +161,63 @@ jobs:
         key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
     - name: Install OpenSSL
       if: steps.cache-openssl.outputs.cache-hit != 'true'
-      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $PWD/multissl --openssl $OPENSSL_VER --system Linux
+      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $MULTISSL_DIR --openssl $OPENSSL_VER --system Linux
+    - name: Add ccache to PATH
+      run: |
+        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+    - name: Configure ccache action
+      uses: hendrikmuhs/ccache-action@v1
     - name: Configure CPython
-      run: ./configure --with-pydebug --with-openssl=$PWD/multissl/openssl/$OPENSSL_VER
+      run: ./configure --with-pydebug --with-openssl=$OPENSSL_DIR
     - name: Build CPython
       run: make -j4
     - name: Display build info
       run: make pythoninfo
     - name: Tests
       run: xvfb-run make buildbottest TESTOPTS="-j4 -uall,-cpu"
+
+  build_ubuntu_ssltests:
+    name: 'Ubuntu SSL tests with OpenSSL ${{ matrix.openssl_ver }}'
+    runs-on: ubuntu-20.04
+    needs: check_source
+    if: needs.check_source.outputs.run_tests == 'true' && needs.check_source.outputs.run_ssl_tests == 'true'
+    strategy:
+      fail-fast: false
+      matrix:
+        openssl_ver: [1.0.2u, 1.1.0l, 1.1.1k, 3.0.0-alpha14]
+    env:
+      OPENSSL_VER: ${{ matrix.openssl_ver }}
+      MULTISSL_DIR: ${{ github.workspace }}/multissl
+      OPENSSL_DIR: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}
+      LD_LIBRARY_PATH: ${{ github.workspace }}/multissl/openssl/${{ matrix.openssl_ver }}/lib
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install Dependencies
+      run: sudo ./.github/workflows/posix-deps-apt.sh
+    - name: Configure OpenSSL env vars
+      run: |
+        echo "MULTISSL_DIR=${GITHUB_WORKSPACE}/multissl" >> $GITHUB_ENV
+        echo "OPENSSL_DIR=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}" >> $GITHUB_ENV
+        echo "LD_LIBRARY_PATH=${GITHUB_WORKSPACE}/multissl/openssl/${OPENSSL_VER}/lib" >> $GITHUB_ENV
+    - name: 'Restore OpenSSL build'
+      id: cache-openssl
+      uses: actions/cache@v2.1.4
+      with:
+        path: ./multissl/openssl/${{ env.OPENSSL_VER }}
+        key: ${{ runner.os }}-multissl-openssl-${{ env.OPENSSL_VER }}
+    - name: Install OpenSSL
+      if: steps.cache-openssl.outputs.cache-hit != 'true'
+      run: python3 Tools/ssl/multissltests.py --steps=library --base-directory $MULTISSL_DIR --openssl $OPENSSL_VER --system Linux
+    - name: Add ccache to PATH
+      run: |
+        echo "PATH=/usr/lib/ccache:$PATH" >> $GITHUB_ENV
+    - name: Configure ccache action
+      uses: hendrikmuhs/ccache-action@v1
+    - name: Configure CPython
+      run: ./configure --with-pydebug --with-openssl=$OPENSSL_DIR
+    - name: Build CPython
+      run: make -j4
+    - name: Display build info
+      run: make pythoninfo
+    - name: SSL tests
+      run: ./python Lib/test/ssltests.py
diff --git a/.github/workflows/posix-deps-apt.sh b/.github/workflows/posix-deps-apt.sh
index 5c7b998..56cc70e 100755
--- a/.github/workflows/posix-deps-apt.sh
+++ b/.github/workflows/posix-deps-apt.sh
@@ -3,6 +3,7 @@ apt-get update
 
 apt-get -yq install \
     build-essential \
+    ccache \
     gdb \
     lcov \
     libbz2-dev \