Disable c-ares when building on arm github actions.

It's very slow, and we don't test it under manylinux anyway.

.github/workflows/ci.yml

@@ -114,10 +114,12 @@ jobs:
           docker run --rm --privileged hypriot/qemu-register
       - name: Build and test gevent
         # Skip the bulk of the tests, running them emulated on arm takes
-        # forever
+        # forever. Likewise, don't build or even configure c-ares; in the emulated platform
+        # it takes at least 15 minutes and often much longer.
         env:
           DOCKER_IMAGE: quay.io/pypa/manylinux2014_aarch64
           GEVENTTEST_SKIP_ALL: 1
+          GEVENTSETUP_DISABLE_ARES: 1
         run: scripts/releases/make-manylinux
       - name: Upload gevent wheels
         uses: actions/upload-artifact@v2

_setuputils.py

@@ -26,7 +26,8 @@ WIN = sys.platform.startswith('win')
 
 RUNNING_ON_TRAVIS = os.environ.get('TRAVIS')
 RUNNING_ON_APPVEYOR = os.environ.get('APPVEYOR')
-RUNNING_ON_CI = RUNNING_ON_TRAVIS or RUNNING_ON_APPVEYOR
+RUNNING_ON_GITHUB_ACTIONS = os.environ.get('GITHUB_ACTIONS')
+RUNNING_ON_CI = RUNNING_ON_TRAVIS or RUNNING_ON_APPVEYOR or RUNNING_ON_GITHUB_ACTIONS
 RUNNING_FROM_CHECKOUT = os.path.isdir(os.path.join(THIS_DIR, ".git"))
 
 
@@ -77,7 +78,7 @@ def glob_many(*globs):
 # They should all begin with ``GEVENTSETUP_``
 
 
-def _bool_from_environ(key):
+def bool_from_environ(key):
     value = os.environ.get(key)
     if not value:
         return
@@ -97,9 +98,9 @@ def _check_embed(key, defkey, path=None, warn=False):
     those don't exist, then check for the existence of *path* and return
     that (if path is given)
     """
-    value = _bool_from_environ(key)
+    value = bool_from_environ(key)
     if value is None:
-        value = _bool_from_environ(defkey)
+        value = bool_from_environ(defkey)
     if value is not None:
         if warn:
             print("Warning: gevent setup: legacy environment key %s or %s found"

scripts/releases/make-manylinux

@@ -82,13 +82,17 @@ if [ -d /gevent -a -d /opt/python ]; then
     cd /tmp/build
     git clone /gevent gevent
     cd gevent
-    echo Configuring cares
-    time (cd deps/c-ares && ./configure --disable-dependency-tracking -C > /dev/null )
+    if [ -z "$GEVENTSETUP_DISABLE_ARES" ]; then
+        echo Configuring cares
+        time (cd deps/c-ares && ./configure --disable-dependency-tracking -C > /dev/null )
+    else
+        echo Not configuring c-ares because it is disabled
+    fi
     rm -rf /gevent/wheelhouse
     mkdir /gevent/wheelhouse
     OPATH="$PATH"
     which auditwheel
-    for variant in `ls -d /opt/python/cp{27,36,37,38,39}*`; do
+    for variant in `ls -d /opt/python/cp{27,37,38,39}*`; do
         export PATH="$variant/bin:$OPATH"
         echo "Building $variant $(python --version)"
 
@@ -108,7 +112,9 @@ if [ -d /gevent -a -d /opt/python ]; then
         python -c 'from __future__ import print_function; from gevent._compat import get_clock_info; print("clock info", get_clock_info("perf_counter"))'
         python -c 'from __future__ import print_function; import greenlet; print(greenlet, greenlet.__version__)'
         python -c 'from __future__ import print_function; import gevent.core; print("loop", gevent.core.loop)'
-        python -c 'from __future__ import print_function; import gevent.ares; print("ares", gevent.ares)'
+        if [ -z "$GEVENTSETUP_DISABLE_ARES" ]; then
+            python -c 'from __future__ import print_function; import gevent.ares; print("ares", gevent.ares)'
+        fi
 
         if [ -z "$GEVENTTEST_SKIP_ALL" ]; then
             # TODO: Make the testrunner automatically repeat flaky tests.
@@ -143,5 +149,5 @@ fi
 # Travis CI and locally we want `-ti`, but github actions doesn't have a TTY, so one
 # or the other of the arguments causes this to fail with 'input device is not a TTY'
 # Pas through whether we're running on github or not to help with caching.
-docker run --rm -e GITHUB_ACTIONS -e GEVENTTEST_SKIP_ALL -e DOCKER_IMAGE -v "$(pwd):/gevent" -v "$LCACHE:/cache" -v "$HOME/.ccache:/ccache" ${DOCKER_IMAGE:-quay.io/pypa/manylinux2010_x86_64} /gevent/scripts/releases/$(basename $0)
+docker run --rm -e GEVENTSETUP_DISABLE_ARES -e GITHUB_ACTIONS -e GEVENTTEST_SKIP_ALL -e DOCKER_IMAGE -v "$(pwd):/gevent" -v "$LCACHE:/cache" -v "$HOME/.ccache:/ccache" ${DOCKER_IMAGE:-quay.io/pypa/manylinux2010_x86_64} /gevent/scripts/releases/$(basename $0)
 ls -l wheelhouse

setup.py

@@ -21,6 +21,7 @@ from _setuputils import GeventClean
 from _setuputils import BuildFailed
 from _setuputils import cythonize1
 from _setuputils import get_include_dirs
+from _setuputils import bool_from_environ
 
 # Environment variables that are intended to be used outside of our own
 # CI should be documented in ``installing_from_source.rst``
@@ -170,6 +171,10 @@ EXT_MODULES = [
     TRACER,
 ]
 
+if bool_from_environ('GEVENTSETUP_DISABLE_ARES'):
+    print("c-ares module disabled, not building")
+    EXT_MODULES.remove(ARES)
+
 LIBEV_CFFI_MODULE = 'src/gevent/libev/_corecffi_build.py:ffi'
 LIBUV_CFFI_MODULE = 'src/gevent/libuv/_corecffi_build.py:ffi'
 cffi_modules = []