Merge pull request #360 from carpentries-incubator/anenadic-failed-builds

Added callout about failed builds

Author: anenadic

README.md

@@ -69,11 +69,11 @@ This indicates that the maintainers will welcome pull requests fixing such issue
 
 Current maintainers of this lesson (in alphabetical order) are:
 
-* [Matthew Bluteau][matthew-bluteau]
+* [Matthew Bluteau][matthew-bluteau] - Lead Maintainer for the period 1 May 2024 - 31 October 2024
 * [Steve Crouch][steve-crouch]
 * [Kamilla Kopec-Harding][kamilla-kopec-harding]
 * [Doug Lowe][doug-lowe]
-* [Aleksandra Nenadic][aleksandra-nenadic] (lead Maintainer for the period 1 October 2023 - 31 March 2024)
+* [Aleksandra Nenadic][aleksandra-nenadic]
 
 The maintainer team aims to meet at 11:00 UK time (BST or GMT) on the fourth Wednesday each month. The meetings alternate between operations meetings and co-working sprints.
 Meeting notes are kept in the [Google doc](https://docs.google.com/document/d/1-SvoY_2GvlQgJnu8zfr6VnU7sev_iWZAIwBUywNSfWE/edit#).

_episodes/23-continuous-integration-automated-testing.md

@@ -421,4 +421,25 @@ which potentially saves us a lot of time waiting for testing results.
 Overall, this approach allows us to massively scale our automated testing
 across platforms we wish to test.
 
+> ## Failed CI Builds
+> A CI build can fail when, e.g. a used Python package no longer supports a particular version of 
+> Python indicated in a GitHub Actions CI build matrix. In this case, the solution is either to 
+> upgrade the Python version in the build matrix (when possible) or downgrade the package version (and not use the latest one like we have been doing in this course).
+>
+> Also note that, if one job fails in the build for any reason - all subsequent jobs will get cancelled because of the default behavior of
+> GitHub Actions. From [GitHub's documentation](https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs#handling-failures):
+>
+>   >*"GitHub will cancel all in-progress and queued jobs in the matrix if any job in the matrix fails."*
+>
+> This behaviour can be controlled by changing the value of the `fail-fast` property:
+> ~~~
+> ...
+>    strategy:
+>      fail-fast: false
+>      matrix:
+> ...
+> ~~~
+{: .language-yaml}
+{: .callout}
+
 {% include links.md %}