From 6ac1e6e0500306cd0797fa2e75f075dfeaa43023 Mon Sep 17 00:00:00 2001
From: odidev <odidev@puresoftware.com>
Date: Tue, 21 Jul 2020 16:06:02 +0000
Subject: [PATCH] Added arm64 jobs for Travis-CI

Signed-off-by: odidev <odidev@puresoftware.com>
---
 .travis.yml                                   | 28 +++++++++++++++++--
 .../tests/test_backends_interactive.py        |  3 ++
 requirements/testing/travis_arm64_extra.txt   |  6 ++++
 3 files changed, 35 insertions(+), 2 deletions(-)
 create mode 100644 requirements/testing/travis_arm64_extra.txt

diff --git a/.travis.yml b/.travis.yml
index 5630514bf7bb..a405782d0c18 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -70,6 +70,7 @@ env:
     - NO_AT_BRIDGE=1  # Necessary for GTK3 interactive test.
     - OPENBLAS_NUM_THREADS=1
     - PYTHONFAULTHANDLER=1
+    - XVFB=""
 
 matrix:
   include:
@@ -77,12 +78,31 @@ matrix:
       env:
         - PINNEDVERS='-c requirements/testing/minver.txt'
         - DELETE_FONT_CACHE=1
+    - python: 3.7
+      arch: arm64
+      env:
+        - PINNEDVERS='-c requirements/testing/minver.txt'
+        - DELETE_FONT_CACHE=1
+        - PIP_NO_CACHE_DIR=off
+        - XVFB=xvfb-run
     - python: 3.7
       env:
         - EXTRAREQS='-r requirements/testing/travis_extra.txt'
+    - python: 3.7
+      arch: arm64
+      env:
+        - EXTRAREQS='-r requirements/testing/travis_arm64_extra.txt'
+        - PIP_NO_CACHE_DIR=off
+        - XVFB=xvfb-run
     - python: 3.8
       env:
         - EXTRAREQS='-r requirements/testing/travis_extra.txt'
+    - python: 3.8
+      arch: arm64
+      env:
+        - EXTRAREQS='-r requirements/testing/travis_arm64_extra.txt'
+        - PIP_NO_CACHE_DIR=off
+        - XVFB=xvfb-run
     - python: "nightly"
       env:
         - PRE=--pre
@@ -121,6 +141,10 @@ install:
     git describe
     # Upgrade pip and setuptools and wheel to get as clean an install as possible.
     python -mpip install --upgrade pip setuptools wheel
+  - |
+    if [[ "${TRAVIS_CPU_ARCH}" == "arm64" ]]; then
+      sudo apt-get install -y xvfb python3-tk imagemagick;
+    fi
   - |
     # Install dependencies from PyPI.
     python -mpip install --upgrade $PRE -r requirements/testing/travis_all.txt $EXTRAREQS $PINNEDVERS
@@ -183,10 +207,10 @@ script:
   # Each script we want to run need to go in its own section and the program
   # you want to fail travis needs to be the last thing called.
   - |
-    # The number of processes is hardcoded (-n2), because using too many
+    # The number of processes is hardcoded (-n4), because using too many
     # causes the Travis VM to run out of memory (since so many copies of
     # inkscape and ghostscript are running at the same time).
-    python -mpytest -raR --maxfail=50 --timeout=300 --durations=25 --cov-report= --cov=lib -n2 --log-level=DEBUG
+     $XVFB python -mpytest -raR --maxfail=50 --timeout=300 --durations=25 --cov-report= --cov=lib -n4 --log-level=DEBUG
 
 before_cache: |
   rm -rf $HOME/.cache/matplotlib/tex.cache
diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
index 000ff971bc97..376fb4f87df4 100644
--- a/lib/matplotlib/tests/test_backends_interactive.py
+++ b/lib/matplotlib/tests/test_backends_interactive.py
@@ -154,6 +154,9 @@ def check_alt_backend(alt_backend):
 @pytest.mark.parametrize("toolbar", ["toolbar2", "toolmanager"])
 @pytest.mark.flaky(reruns=3)
 def test_interactive_backend(backend, toolbar):
+    # Skipping the test for Travis-CI on arm64 platform
+    if os.environ.get('TRAVIS_CPU_ARCH') == "arm64":
+        pytest.skip("Skipping for aarch64 architecture")
     if backend == "macosx":
         if toolbar == "toolmanager":
             pytest.skip("toolmanager is not implemented for macosx.")
diff --git a/requirements/testing/travis_arm64_extra.txt b/requirements/testing/travis_arm64_extra.txt
new file mode 100644
index 000000000000..44704a929b4a
--- /dev/null
+++ b/requirements/testing/travis_arm64_extra.txt
@@ -0,0 +1,6 @@
+# Extra pip requirements of the travis python 3.7+ builds for Arm64 platform
+
+ipykernel
+nbconvert[execute]
+nbformat!=5.0.0,!=5.0.1
+pytz