matplotlib · jkseppan · Aug 2, 2020 · Jul 31, 2020 · Jul 31, 2020 · Jul 31, 2020
diff --git a/.travis.yml b/.travis.yml
@@ -87,6 +87,7 @@ matrix:
       env:
         - PRE=--pre
     - os: osx
+      osx_image: xcode9
       language: generic  # https://github.com/travis-ci/travis-ci/issues/2312
       only: master
       cache:
@@ -101,26 +102,15 @@ matrix:
   allow_failures:
     - python: "nightly"
 
-before_install: |
+before_install:
+- |
+  # Install OS dependencies and set up ccache
   case "$TRAVIS_OS_NAME" in
   linux)
     export PATH=/usr/lib/ccache:$PATH
     ;;
   osx)
-    set -e
-    ci/silence brew update
-    brew uninstall numpy gdal postgis
-    brew unlink python@2
-    brew install python || brew upgrade python
-    brew install ffmpeg imagemagick mplayer ccache
-    hash -r
-    which python
-    python --version
-    set +e
-    # We could install ghostscript and inkscape here to test svg and pdf
-    # but this makes the test time really long.
-    # brew install ghostscript inkscape
-    export PATH=/usr/local/opt/python/libexec/bin:/usr/local/opt/ccache/libexec:$PATH
+    ci/osx-deps
     ;;
   esac
 
@@ -169,7 +159,7 @@ install:
       export CPPFLAGS=--coverage
     fi
   - |
-    python -mpip install -ve .  # Install Matplotlib.
+    python -mpip install -e .  # Install Matplotlib.
   - |
     if [[ $TRAVIS_OS_NAME != 'osx' ]]; then
       unset CPPFLAGS

diff --git a/ci/osx-deps b/ci/osx-deps
@@ -0,0 +1,65 @@
+#!/bin/bash
+
+set -euo pipefail
+cache="$HOME"/.cache/matplotlib
+
+fold_start() {
+    key=$1
+    title=$2
+    echo -e "travis_fold:start:$key\e[2K"
+    echo -e "travis_time:start:$key\e[2K"
+    tick="$(date +%s)"
+    echo "$title"
+}
+
+fold_end() {
+    key=$1
+    tock="$(date +%s)"
+    nano=000000000
+    echo -e "travis_time:end:$key:start=$tick$nano,finish=$tock$nano,duration=$((tock - tick))$nano\e[2K"
+    echo -e "travis_fold:end:$key\e[2K"
+}
+
+cached_download() {
+    file=$1
+    url=$2
+    shasum=$3
+    path="$cache/$file"
+    if [[ ! -f "$path"
+          || "$(shasum -a 256 "$path" | awk '{print $1}')" != "$shasum" ]]
+    then
+        curl -L -o "$path" "$url"
+    fi
+}
+
+fold_start Python "Install Python 3.8 from python.org"
+cached_download python-3.8.5-macosx10.9.pkg \
+                https://www.python.org/ftp/python/3.8.5/python-3.8.5-macosx10.9.pkg \
+                e27c5a510c10f830084fb9c60b9e9aa8719d92e4537a80e6b4252c02396f0d29
+sudo installer -package "$cache"/python-3.8.5-macosx10.9.pkg -target /
+sudo ln -s /usr/local/bin/python3 /usr/local/bin/python
+hash -r
+fold_end Python
+
+fold_start ccache 'Install ccache (compile it ourselves)'
+cached_download ccache-3.7.11.tar.xz \
+                https://github.com/ccache/ccache/releases/download/v3.7.11/ccache-3.7.11.tar.xz \
+                8d450208099a4d202bd7df87caaec81baee20ce9dd62da91e9ea7b95a9072f68
+tar xf "$cache"/ccache-3.7.11.tar.xz
+pushd ccache-3.7.11
+./configure --prefix=/usr/local
+make -j2
+make install
+popd
+for compiler in clang clang++ cc gcc c++ g++; do
+  ln -sf ccache /usr/local/bin/$compiler
+done
+fold_end ccache
+
+fold_start freetype 'Install freetype (just unpack into the build directory)'
+cached_download freetype-2.6.1.tar.gz \
+                https://download.savannah.gnu.org/releases/freetype/freetype-2.6.1.tar.gz \
+                0a3c7dfbda6da1e8fce29232e8e96d987ababbbf71ebc8c75659e4132c367014
+mkdir -p build
+tar -x -C build -f "$cache"/freetype-2.6.1.tar.gz
+fold_end freetype
diff --git a/lib/matplotlib/tests/test_backend_qt.py b/lib/matplotlib/tests/test_backend_qt.py
@@ -9,6 +9,12 @@
 import pytest
 
 
+try:
+    from matplotlib.backends.qt_compat import QtGui
+except ImportError:
+    pytestmark = pytest.mark.skip('No usable Qt5 bindings')
+
+
 @pytest.fixture
 def qt_core(request):
     backend, = request.node.get_closest_marker('backend').args

diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
@@ -18,6 +18,12 @@
 # versions so we don't fail on missing backends.
 
 def _get_testable_interactive_backends():
+    try:
+        from matplotlib.backends.qt_compat import QtGui  # noqa
+        have_qt5 = True
+    except ImportError:
+        have_qt5 = False
+
     backends = []
     for deps, backend in [
             (["cairo", "gi"], "gtk3agg"),
@@ -39,6 +45,8 @@ def _get_testable_interactive_backends():
             reason = "{} cannot be imported".format(", ".join(missing))
         elif backend == 'macosx' and os.environ.get('TF_BUILD'):
             reason = "macosx backend fails on Azure"
+        elif 'qt5' in backend and not have_qt5:
+            reason = "no usable Qt5 bindings"
         if reason:
             backend = pytest.param(
                 backend,