Parallelize wheel-builds where applicable

.github/workflows/wheel_linux_aarch64.yml

@@ -1,38 +1,27 @@
 name: Wheel::Linux::ARM
+
+# **What it does**: Builds python wheels for Linux (ubuntu-latest) architecture ARM 64 and store it as artifacts.
+#                   Python versions: 3.7, 3.8, 3.9, 3.10.
+# **Why we have it**: To build wheels for pennylane-lightning instalation.
+# **Who does it impact**: Wheels to be uploaded to PyPI.
+
 on:
   push:
     branches:
       - master
   release:
     types: [published]
 
-env:
-  CIBW_BUILD: 'cp37-* cp38-* cp39-* cp310-*'
-  CIBW_SKIP: "*-musllinux*"
-
-  # Python build settings
-  CIBW_BEFORE_BUILD: |
-    pip install pybind11 ninja cmake && yum install -y gcc gcc-c++
-
-  # Testing of built wheels
-  CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
-
-  CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
-
-  CIBW_TEST_COMMAND: |
-    pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
-
-  # Use Centos 7 wheel-builder for ARM
-  CIBW_MANYLINUX_AARCH64_IMAGE: manylinux2014
-
 jobs:
   linux-wheels-aarch64:
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
         arch: [aarch64]
-    name: ubuntu-latest::aarch64
+        cibw_build: [cp37-*, cp38-*, cp39-*, cp310-*]
+
+    name: ubuntu-latest::aarch64 (Python ${{ fromJson('{ "cp37-*":"3.7","cp38-*":"3.8","cp39-*":"3.9","cp310-*":"3.10" }')[matrix.cibw_build] }})
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -57,6 +46,24 @@ jobs:
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
         env:
+          CIBW_BUILD: ${{ matrix.cibw_build }}
+          CIBW_SKIP: "*-musllinux*"
+
+          # Python build settings
+          CIBW_BEFORE_BUILD: |
+            pip install pybind11 ninja cmake && yum install -y gcc gcc-c++
+
+          # Testing of built wheels
+          CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
+
+          CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
+
+          CIBW_TEST_COMMAND: |
+            pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
+
+          # Use Centos 7 wheel-builder for ARM
+          CIBW_MANYLINUX_AARCH64_IMAGE: manylinux2014
+
           CIBW_ARCHS_LINUX: ${{matrix.arch}}
 
       - uses: actions/upload-artifact@v2

.github/workflows/wheel_linux_ppc64le.yml

@@ -1,35 +1,27 @@
 name: Wheel::Linux::PowerPC
+
+# **What it does**: Build python wheels for Linux (ubuntu-latest) architecture PowerPC 64 and store it as artifacts.
+#                   Python versions: 3.7, 3.8, 3.9, 3.10.
+# **Why we have it**: To build wheels for pennylane-lightning instalation.
+# **Who does it impact**: Wheels to be uploaded to PyPI.
+
 on:
   push:
     branches:
       - master
   release:
     types: [published]
 
-env:
-  CIBW_BUILD: 'cp37-* cp38-* cp39-* cp310-*'
-  CIBW_SKIP: "*-musllinux*"
-
-  # Python build settings
-  CIBW_BEFORE_BUILD: |
-    pip install pybind11 ninja cmake && yum install -y gcc gcc-c++
-
-  # Skip PPC tests due to lack of numpy/scipy wheel support
-  CIBW_TEST_SKIP: "*-manylinux_{ppc64le}"
-
-  CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
-
-  # Use CentOS 7 image for PPC
-  CIBW_MANYLINUX_PPC64LE_IMAGE: manylinux2014
-
 jobs:
   linux-wheels-ppc64le:
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
         arch: [ppc64le]
-    name: ubuntu-latest::ppc64le
+        cibw_build: [cp37-*, cp38-*, cp39-*, cp310-*]
+
+    name: ubuntu-latest::ppc64le (Python ${{ fromJson('{ "cp37-*":"3.7","cp38-*":"3.8","cp39-*":"3.9","cp310-*":"3.10" }')[matrix.cibw_build] }})
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -54,6 +46,21 @@ jobs:
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
         env:
+          CIBW_BUILD: ${{ matrix.cibw_build }}
+          CIBW_SKIP: "*-musllinux*"
+
+          # Python build settings
+          CIBW_BEFORE_BUILD: |
+            pip install pybind11 ninja cmake && yum install -y gcc gcc-c++
+
+          # Skip PPC tests due to lack of numpy/scipy wheel support
+          CIBW_TEST_SKIP: "*-manylinux_{ppc64le}"
+
+          CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
+
+          # Use CentOS 7 image for PPC
+          CIBW_MANYLINUX_PPC64LE_IMAGE: manylinux2014
+
           CIBW_ARCHS_LINUX: ${{matrix.arch}}
 
       - uses: actions/upload-artifact@v2

.github/workflows/wheel_linux_x86_64.yml

@@ -1,30 +1,17 @@
 name: Wheel::Linux::x86_64
+
+# **What it does**: Builds python wheels for Linux (ubuntu-latest) architecture x86_64 and store it as artifacts.
+#                   Python versions: 3.7, 3.8, 3.9, 3.10.
+# **Why we have it**: To build wheels for pennylane-lightning instalation.
+# **Who does it impact**: Wheels to be uploaded to PyPI.
+
 on:
-  release:
-    types: [published]
+  pull_request:
   push:
     branches:
       - master
-  pull_request:
-
-env:
-  CIBW_BUILD: 'cp37-* cp38-* cp39-* cp310-*'
-  CIBW_SKIP: "*-musllinux*"
-
-  # Python build settings
-  CIBW_BEFORE_BUILD: |
-    pip install pybind11 ninja cmake && yum install -y gcc gcc-c++
-
-  # Testing of built wheels
-  CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
-
-  CIBW_BEFORE_TEST: |
-    pip install git+https://github.com/PennyLaneAI/pennylane.git@master
-
-  CIBW_TEST_COMMAND: |
-    pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
-
-  CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
+  release:
+    types: [published]
 
 jobs:
   linux-wheels-x86-64:
@@ -33,7 +20,9 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         arch: [x86_64]
-    name: ${{ matrix.os }}
+        cibw_build: [cp37-*, cp38-*, cp39-*, cp310-*]
+
+    name: ${{ matrix.os }} (Python ${{ fromJson('{ "cp37-*":"3.7","cp38-*":"3.8","cp39-*":"3.9","cp310-*":"3.10" }')[matrix.cibw_build] }})
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -53,10 +42,28 @@ jobs:
         run: python -m pip install cibuildwheel==2.3.0
 
       - name: Build wheels
-        run: python -m cibuildwheel --output-dir wheelhouse
         env:
+          CIBW_BUILD: ${{ matrix.cibw_build }}
+          CIBW_SKIP: "*-musllinux*"
+
+          # Python build settings
+          CIBW_BEFORE_BUILD: |
+            pip install pybind11 ninja cmake && yum install -y gcc gcc-c++
+
+          # Testing of built wheels
+          CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
+
+          CIBW_BEFORE_TEST: |
+            pip install git+https://github.com/PennyLaneAI/pennylane.git@master
+
+          CIBW_TEST_COMMAND: |
+            pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
+
+          CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
           CIBW_ARCHS_LINUX: ${{matrix.arch}}
 
+        run: python -m cibuildwheel --output-dir wheelhouse
+
       - uses: actions-ecosystem/action-regex-match@v2
         id: rc_build
         with:

.github/workflows/wheel_macos_arm64.yml

@@ -1,43 +1,31 @@
 name: Wheel::MacOS::ARM
+
+# **What it does**: Builds python wheels for MacOS (11) architecture ARM 64 and store it as artifacts.
+#                   Python versions: 3.8, 3.9, 3.10.
+# **Why we have it**: To build wheels for pennylane-lightning instalation.
+# **Who does it impact**: Wheels to be uploaded to PyPI.
+
 on:
+  pull_request:
   push:
     branches:
       - master
-  pull_request:
   release:
     types: [published]
 
 env:
-  CIBW_BUILD: 'cp37-* cp38-* cp39-* cp310-*'
-
   ARCHS: 'arm64'
 
-  # MacOS specific build settings
-  CIBW_BEFORE_ALL_MACOS: |
-    brew uninstall --force oclint
-
-  # Python build settings
-  CIBW_BEFORE_BUILD: |
-    pip install pybind11 ninja cmake
-
-  # Testing of built wheels
-  CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
-
-  CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
-
-  CIBW_TEST_COMMAND: |
-    pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
-
-  CIBW_BUILD_VERBOSITY: 1
-
 jobs:
   mac-wheels-arm64:
     strategy:
       fail-fast: false
       matrix:
         os: [macos-11]
         arch: [arm64]
-    name: macos-latest::arm64
+        cibw_build: [cp38-*, cp39-*, cp310-*]
+
+    name: macos-latest::arm64 (Python ${{ fromJson('{ "cp37-*":"3.7","cp38-*":"3.8","cp39-*":"3.9","cp310-*":"3.10" }')[matrix.cibw_build] }})
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -57,11 +45,32 @@ jobs:
         run: python -m pip install cibuildwheel==2.3.0
 
       - name: Build wheels
-        run: |
-          python -m cibuildwheel --output-dir wheelhouse
         env:
+          CIBW_BUILD: ${{ matrix.cibw_build }}
+
+          # MacOS specific build settings
+          CIBW_BEFORE_ALL_MACOS: |
+            brew uninstall --force oclint
+
+          # Python build settings
+          CIBW_BEFORE_BUILD: |
+            pip install pybind11 ninja cmake
+
+          # Testing of built wheels
+          CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
+
+          CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
+
+          CIBW_TEST_COMMAND: |
+            pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
+
+          CIBW_BUILD_VERBOSITY: 1
+
           CIBW_ARCHS_MACOS: ${{ matrix.arch }}
 
+        run: |
+          python -m cibuildwheel --output-dir wheelhouse
+
       - uses: actions/upload-artifact@v2
         if: ${{ github.event_name == 'release' || github.ref == 'refs/heads/master' }}
         with:

.github/workflows/wheel_macos_x86_64.yml

@@ -1,34 +1,19 @@
 name: Wheel::MacOS::Intel
+
+# **What it does**: Builds python wheels for MacOS (10.15) architecture x86_64 and store it as artifacts.
+#                   Python versions: 3.7, 3.8, 3.9, 3.10.
+# **Why we have it**: To build wheels for pennylane-lightning instalation.
+# **Who does it impact**: Wheels to be uploaded to PyPI.
+
 on:
+  pull_request:
   push:
     branches:
       - master
-  pull_request:
   release:
     types: [published]
 
 env:
-  CIBW_BUILD: 'cp37-* cp38-* cp39-* cp310-*'
-
-  # MacOS specific build settings
-  CIBW_BEFORE_ALL_MACOS: |
-    brew uninstall --force oclint
-    brew install libomp
-
-  # Python build settings
-  CIBW_BEFORE_BUILD: |
-    pip install pybind11 ninja cmake
-
-  # Testing of built wheels
-  CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
-
-  CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
-
-  CIBW_TEST_COMMAND: |
-    pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
-
-  CIBW_BUILD_VERBOSITY: 1
-
   MACOSX_DEPLOYMENT_TARGET: 10.15
 
 jobs:
@@ -38,7 +23,9 @@ jobs:
       matrix:
         os: [macos-10.15]
         arch: [x86_64]
-    name: ${{ matrix.os }}
+        cibw_build: [cp37-*, cp38-*, cp39-*, cp310-*]
+
+    name: ${{ matrix.os }} (Python ${{ fromJson('{ "cp37-*":"3.7","cp38-*":"3.8","cp39-*":"3.9","cp310-*":"3.10" }')[matrix.cibw_build] }})
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -58,11 +45,34 @@ jobs:
         run: python -m pip install cibuildwheel==2.3.0
 
       - name: Build wheels
-        run: python -m cibuildwheel --output-dir wheelhouse
         env:
+          CIBW_BUILD: ${{ matrix.cibw_build }}
+
+          # MacOS specific build settings
+          CIBW_BEFORE_ALL_MACOS: |
+            brew uninstall --force oclint
+            brew install libomp
+
+          # Python build settings
+          CIBW_BEFORE_BUILD: |
+            pip install pybind11 ninja cmake
+
+          # Testing of built wheels
+          CIBW_TEST_REQUIRES: numpy~=1.21 scipy pytest pytest-cov pytest-mock flaky
+
+          CIBW_BEFORE_TEST: pip install git+https://github.com/PennyLaneAI/pennylane.git@master
+
+          CIBW_TEST_COMMAND: |
+            pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
+
+          CIBW_BUILD_VERBOSITY: 1
+
           CIBW_ARCHS_MACOS: ${{matrix.arch}}
+
           USE_OMP: 1
 
+        run: python -m cibuildwheel --output-dir wheelhouse
+
       - uses: actions-ecosystem/action-regex-match@v2
         id: rc_build
         with: