CI Reduce travis nightly load (#19113)

ogrisel · thomasjpfan · web-flow · commit cbfe0ede80be · 2021-01-06T09:48:57.000-05:00
Co-authored-by: Thomas J. Fan &lt;thomasjpfan@gmail.com&gt;
diff --git a/.travis.yml b/.travis.yml
@@ -36,15 +36,21 @@ jobs:
         - BUILD_WITH_ICC=true
       if: type = cron OR commit_message =~ /\[icc-build\]/
 
-    - python: 3.7
+    # Manual trigger of linux/arm64 tests in PR without triggering the full
+    # wheel building process for all the Python versions. 
+    - python: 3.9
       os: linux
       arch: arm64
-      if: type = cron OR commit_message =~ /\[arm64\]/
+      if: commit_message =~ /\[arm64\]/
       env:
         - CPU_COUNT=8
 
-    # Linux environments to build the scikit-learn wheels
-    # for the ARM64 arquitecture and Python 3.6 and newer
+    # Linux environments to build the scikit-learn wheels for the ARM64
+    # architecture and Python 3.6 and newer. This is used both at release time
+    # with the manual trigger in the commit message in the release branch and as
+    # a scheduled task to build the weekly dev build on the master branch. The
+    # weekly frequency is meant to avoid depleting the Travis CI credits too
+    # fast.
     - python: 3.6
       os: linux
       arch: arm64
