Use Azure Pipelines itself to generate and run test matrix from Python script

Instead of having to run a script on the developer's system and then committing the result, Azure Pipelines itself can run a modification of that script and reuse the variable it sets in later steps to determine the test matrices.

Reference: https://docs.microsoft.com/en-us/azure/devops/pipelines/process/phases?view=azure-devops&tabs=yaml#multi-configuration

With this, `/azure-pipelines.yml` no longer needs to be treated like a committed generated artifact!

Closes #30.

azure-pipelines.yml

@@ -1,156 +1,46 @@
-# Generated by `generate_azure_pipelines_yml.py`
-# Please edit template in `ci/`
-
 jobs:
-- job: Mac
+- job: MatricesGenerator
+  displayName: Matrices Generator
   pool:
-    vmImage: macOS-10.14
+    vmImage: 'ubuntu-16.04'
+  steps:
+    - task: UsePythonVersion@0
+      inputs:
+        versionSpec: '3.7'
+        addToPath: true
+    - bash: python generate_azure_pipelines_matrices.py
+      name: mtrx
+      displayName: Generate test matrices and set variables in Azure Pipelines
+
+- job: Mac
+  dependsOn: MatricesGenerator
+  pool:
+    vmImage: 'macOS-10.14'
+  strategy:
+    matrix: $[ dependencies.MatricesGenerator.outputs['mtrx.mac'] ]
   steps:
     - script: brew install p7zip
       displayName: Install 7zip
     - template: ci/steps.yml
-  strategy:
+
-    matrix:
-      QT 5.11.3 mac desktop clang_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.11.3
-        HOST: mac
-        TARGET: desktop
-        ARCH: clang_64
-        ARCHDIR: clang_64
-      QT 5.12.3 mac desktop clang_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.12.3
-        HOST: mac
-        TARGET: desktop
-        ARCH: clang_64
-        ARCHDIR: clang_64
-      QT 5.13.0 mac desktop clang_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: mac
-        TARGET: desktop
-        ARCH: clang_64
-        ARCHDIR: clang_64
-      QT 5.13.0 mac ios ios:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: mac
-        TARGET: ios
-        ARCH: ios
-        ARCHDIR: ios
 - job: Windows
+  dependsOn: MatricesGenerator
   pool:
-    vmImage: vs2017-win2016
+    vmImage: 'vs2017-win2016'
+  strategy:
+    matrix: $[ dependencies.MatricesGenerator.outputs['mtrx.windows'] ]
   steps:
     - template: ci/steps.yml
-  strategy:
+
-    matrix:
-      QT 5.11.3 windows desktop win64_msvc2017_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.11.3
-        HOST: windows
-        TARGET: desktop
-        ARCH: win64_msvc2017_64
-        ARCHDIR: msvc2017_64
-      QT 5.11.3 windows desktop win32_msvc2015:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.11.3
-        HOST: windows
-        TARGET: desktop
-        ARCH: win32_msvc2015
-        ARCHDIR: msvc2015
-      QT 5.12.3 windows desktop win64_msvc2017_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.12.3
-        HOST: windows
-        TARGET: desktop
-        ARCH: win64_msvc2017_64
-        ARCHDIR: msvc2017_64
-      QT 5.12.3 windows desktop win32_msvc2017:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.12.3
-        HOST: windows
-        TARGET: desktop
-        ARCH: win32_msvc2017
-        ARCHDIR: msvc2017
-      QT 5.13.0 windows desktop win64_msvc2017_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: windows
-        TARGET: desktop
-        ARCH: win64_msvc2017_64
-        ARCHDIR: msvc2017_64
-      QT 5.13.0 windows desktop win64_msvc2015_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: windows
-        TARGET: desktop
-        ARCH: win64_msvc2015_64
-        ARCHDIR: msvc2015_64
-      QT 5.13.0 windows desktop win64_mingw73:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: windows
-        TARGET: desktop
-        ARCH: win64_mingw73
-        ARCHDIR: mingw73_64
-      QT 5.13.0 windows desktop win32_msvc2017:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: windows
-        TARGET: desktop
-        ARCH: win32_msvc2017
-        ARCHDIR: msvc2017
-      QT 5.13.0 windows desktop win32_mingw73:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: windows
-        TARGET: desktop
-        ARCH: win32_mingw73
-        ARCHDIR: mingw73_32
 - job: Linux
+  dependsOn: MatricesGenerator
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: 'ubuntu-16.04'
+  strategy:
+    matrix: $[ dependencies.MatricesGenerator.outputs['mtrx.linux'] ]
   steps:
     - template: ci/steps.yml
-  strategy:
+
-    matrix:
-      QT 5.11.3 linux desktop gcc_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.11.3
-        HOST: linux
-        TARGET: desktop
-        ARCH: gcc_64
-        ARCHDIR: gcc_64
-      QT 5.12.3 linux desktop gcc_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.12.3
-        HOST: linux
-        TARGET: desktop
-        ARCH: gcc_64
-        ARCHDIR: gcc_64
-      QT 5.13.0 linux desktop gcc_64:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: linux
-        TARGET: desktop
-        ARCH: gcc_64
-        ARCHDIR: gcc_64
-      QT 5.13.0 linux android android_x86:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: linux
-        TARGET: android
-        ARCH: android_x86
-        ARCHDIR: android_x86
-      QT 5.13.0 linux android android_armv7:
-        PYTHON_VERSION: '3.7'
-        QT_VERSION: 5.13.0
-        HOST: linux
-        TARGET: android
-        ARCH: android_armv7
-        ARCHDIR: android_armv7
 - job: LinuxSpecificMirror
   displayName: Linux (Specific Mirror)
   variables:
@@ -162,6 +52,6 @@ jobs:
     ARCHDIR: android_armv7
     QT_BASE_MIRROR: http://mirrors.ocf.berkeley.edu/qt/
   pool:
-    vmImage: ubuntu-16.04
+    vmImage: 'ubuntu-16.04'
   steps:
     - template: ci/steps.yml

ci/azure-pipelines.tmpl.yml

@@ -1,35 +0,0 @@
-# Generated by `generate_azure_pipelines_yml.py`
-# Please edit template in `ci/`
-
-jobs:
-- job: Mac
-  pool:
-    vmImage: 'macOS-10.14'
-  steps:
-    - script: brew install p7zip
-      displayName: Install 7zip
-    - template: ci/steps.yml
-- job: Windows
-  pool:
-    vmImage: 'vs2017-win2016'
-  steps:
-    - template: ci/steps.yml
-- job: Linux
-  pool:
-    vmImage: 'ubuntu-16.04'
-  steps:
-    - template: ci/steps.yml
-- job: LinuxSpecificMirror
-  displayName: Linux (Specific Mirror)
-  variables:
-    PYTHON_VERSION: '3.7'
-    QT_VERSION: 5.13.0
-    HOST: linux
-    TARGET: android
-    ARCH: android_armv7
-    ARCHDIR: android_armv7
-    QT_BASE_MIRROR: http://mirrors.ocf.berkeley.edu/qt/
-  pool:
-    vmImage: 'ubuntu-16.04'
-  steps:
-    - template: ci/steps.yml

generate_azure_pipelines_matrices.py

@@ -1,13 +1,10 @@
 """
-This generates a matrix of QT versions to test downloading against
+This sets variables for a matrix of QT versions to test downloading against with Azure Pipelines
 """
 import collections
-import os
+import json
 from itertools import product
 
-from ruamel.yaml import YAML
-from ruamel.yaml.comments import CommentedMap
-
 
 class BuildJob:
     def __init__(self, qt_version, host, target, arch, archdir):
@@ -101,37 +98,25 @@ for android_arch in ['android_x86', 'android_armv7']:
 matrices = {}
 
 for platform_build_job in all_platform_build_jobs:
-    yaml_dictionary = collections.OrderedDict({
+    matrix_dictionary = collections.OrderedDict()
-        'matrix':  CommentedMap()
+
-    })
     for build_job, python_version in product(platform_build_job.build_jobs, python_versions):
         key = 'QT {} {} {} {}'.format(build_job.qt_version, build_job.host, build_job.target,
                                       build_job.arch)
-        yaml_dictionary['matrix'][key] = \
+        matrix_dictionary[key] = collections.OrderedDict(
-            {
+            [
-                'PYTHON_VERSION': python_version,
+                ('PYTHON_VERSION', python_version),
-                'QT_VERSION': build_job.qt_version,
+                ('QT_VERSION', build_job.qt_version),
-                'HOST': build_job.host,
+                ('HOST', build_job.host),
-                'TARGET': build_job.target,
+                ('TARGET', build_job.target),
-                'ARCH': build_job.arch,
+                ('ARCH', build_job.arch),
-                'ARCHDIR': build_job.archdir,
+                ('ARCHDIR', build_job.archdir),
-            }
+            ]
+        )
 
-    # CommentedMap wraps yaml_dictionary to suppress the !!omap annotation
+    matrices[platform_build_job.platform] = matrix_dictionary
-    matrices[platform_build_job.platform.capitalize()] = CommentedMap(yaml_dictionary)
 
-root_dir = os.path.abspath(os.path.dirname(__file__))
+print("Setting Variables below")
-
+print(f"##vso[task.setVariable variable=linux;isOutput=true]{json.dumps(matrices['linux'])}")
-# Load azure-pipelines.tmpl.yml
+print(f"##vso[task.setVariable variable=windows;isOutput=true]{json.dumps(matrices['windows'])}")
-with open(os.path.join(root_dir, 'ci', 'azure-pipelines.tmpl.yml'), 'r') as f:
+print(f"##vso[task.setVariable variable=mac;isOutput=true]{json.dumps(matrices['mac'])}")
-    azure_pipelines_yaml = YAML().load(f.read())
-
-# Attach strategies to their respective jobs
-for job_yaml in azure_pipelines_yaml['jobs']:
-    if job_yaml['job'] in matrices:
-        job_yaml['strategy'] = matrices[job_yaml['job']]
-
-with open(os.path.join(root_dir, 'azure-pipelines.yml'), 'w') as f:
-    YAML().dump(azure_pipelines_yaml, f)
-
-pass