How to skip a configuration of a matrix with GitHub actions? - workflow

Question

I have the following job on GitHub actions. And I would to like to skip the macOS x86 configuration: is there a way to do this?
build-and-push-native-libraries:
name: Build and push native library on ${{ matrix.os }} ${{ matrix.architecture }}
strategy:
fail-fast: true
matrix:
os: [ubuntu-latest, macOS, windows-latest]
java: [15]
architecture: [x86, x64]
include:
- compiler: gcc
gcc: 8
runs-on: ${{ matrix.os }}
steps:
- name: Set up JDK ${{ matrix.java }}
uses: actions/setup-java#v1
with:
java-version: ${{ matrix.java }}
architecture: ${{ matrix.architecture }}
- uses: actions/checkout#v2
- if: startsWith(matrix.os, 'ubuntu') == true
name: Change the permissions of the build script of external classes
run: chmod +x ./java/src/main/resources/compileExternalClasses.sh
- name: Build and push native library
run: |
mvn -B clean package -DskipTests=true --file ./native/pom.xml
git config user.name "${{ github.event.head_commit.committer.name }}"
git config user.email "${{ github.event.head_commit.committer.email }}"
git pull origin experimental
git commit -am "Generated library for ${{ matrix.os }} ${{ matrix.architecture }}" --allow-empty
git push

Answer 1

You can use exclude
You can remove a specific configurations defined in the build matrix using the exclude option. Using exclude removes a job defined by the build matrix. The number of jobs is the cross product of the number of operating systems (os) included in the arrays you provide, minus any subtractions (exclude).
runs-on: ${{ matrix.os }}
strategy:
matrix:
os: [macos-latest, windows-latest, ubuntu-18.04]
node: [8, 10, 12, 14]
exclude:
# excludes node 8 on macOS
- os: macos-latest
node: 8
In your case it would be:
matrix:
os: [ubuntu-latest, macOS, windows-latest]
java: [15]
architecture: [x86, x64]
include:
- compiler: gcc
gcc: 8
exclude:
- os: macOS