From: Christian Heimes <christian@python.org>
Date: Sat, 4 Dec 2021 10:07:59 +0000 (+0200)
Subject: bpo-45695: Test out-of-tree builds on GHA (GH-29904)
X-Git-Tag: v3.11.0a3~55
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=cee07b162843694e8166ad8715162d4d5886b50f;p=thirdparty%2FPython%2Fcpython.git

bpo-45695: Test out-of-tree builds on GHA (GH-29904)
---

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fe4b14828699..fbf7bb6fe212 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -179,13 +179,28 @@ jobs:
         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
+    - name: Setup directory envs for out-of-tree builds
+      run: |
+        echo "CPYTHON_RO_SRCDIR=$(realpath -m ${GITHUB_WORKSPACE}/../cpython-ro-srcdir)" >> $GITHUB_ENV
+        echo "CPYTHON_BUILDDIR=$(realpath -m ${GITHUB_WORKSPACE}/../cpython-builddir)" >> $GITHUB_ENV
+    - name: Create directories for read-only out-of-tree builds
+      run: mkdir -p $CPYTHON_RO_SRCDIR $CPYTHON_BUILDDIR
+    - name: Bind mount sources read-only
+      run: sudo mount --bind -o ro $GITHUB_WORKSPACE $CPYTHON_RO_SRCDIR
+    - name: Configure CPython out-of-tree
+      working-directory: ${{ env.CPYTHON_BUILDDIR }}
+      run: ../cpython-ro-srcdir/configure --with-pydebug --with-openssl=$OPENSSL_DIR
+    - name: Build CPython out-of-tree
+      working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: make -j4
     - name: Display build info
+      working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: make pythoninfo
+    - name: Remount sources writable for tests
+      # some tests write to srcdir, lack of pyc files slows down testing
+      run: sudo mount $CPYTHON_RO_SRCDIR -oremount,rw
     - name: Tests
+      working-directory: ${{ env.CPYTHON_BUILDDIR }}
       run: xvfb-run make buildbottest TESTOPTS="-j4 -uall,-cpu"
 
   build_ubuntu_ssltests:
diff --git a/Misc/NEWS.d/next/Tests/2021-12-03-14-19-16.bpo-45695.QKBn2E.rst b/Misc/NEWS.d/next/Tests/2021-12-03-14-19-16.bpo-45695.QKBn2E.rst
new file mode 100644
index 000000000000..14ecd923dbd5
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2021-12-03-14-19-16.bpo-45695.QKBn2E.rst
@@ -0,0 +1 @@
+Out-of-tree builds with a read-only source directory are now tested by CI.