CI: Simplify Azure Pipelines configuration files (pandas-dev#23111)

Author: vtbassmatt

azure-pipelines.yml

@@ -1,28 +1,20 @@
 # Adapted from https://github.com/numba/numba/blob/master/azure-pipelines.yml
 jobs:
-# Mac and Linux could potentially use the same template
-# except it isn't clear how to use a different build matrix
-# for each, so for now they are separate
-- template: ci/azure/macos.yml
+# Mac and Linux use the same template
+- template: ci/azure/posix.yml
   parameters:
     name: macOS
     vmImage: xcode9-macos10.13
-- template: ci/azure/linux.yml
+- template: ci/azure/posix.yml
   parameters:
     name: Linux
     vmImage: ubuntu-16.04
 
-# Windows Python 2.7 needs VC 9.0 installed, and not sure
-# how to make that a conditional task, so for now these are
-# separate templates as well
+# Windows Python 2.7 needs VC 9.0 installed, handled in the template
 - template: ci/azure/windows.yml
   parameters:
     name: Windows
     vmImage: vs2017-win2016
-- template: ci/azure/windows-py27.yml
-  parameters:
-    name: WindowsPy27
-    vmImage: vs2017-win2016
 
 - job: 'Checks_and_doc'
   pool:

ci/azure/linux.yml

@@ -7,12 +7,30 @@ jobs:
   pool:
     vmImage: ${{ parameters.vmImage }}
   strategy:
-    maxParallel: 11
     matrix:
-      py35_np_120:
-        ENV_FILE: ci/deps/azure-macos-35.yaml
-        CONDA_PY: "35"
-        PATTERN: "not slow and not network"
+      ${{ if eq(parameters.name, 'macOS') }}:
+        py35_np_120:
+          ENV_FILE: ci/deps/azure-macos-35.yaml
+          CONDA_PY: "35"
+          PATTERN: "not slow and not network"
+
+      ${{ if eq(parameters.name, 'Linux') }}:
+        py27_np_120:
+          ENV_FILE: ci/deps/azure-27-compat.yaml
+          CONDA_PY: "27"
+          PATTERN: "not slow and not network"
+
+        py37_locale:
+          ENV_FILE: ci/deps/azure-37-locale.yaml
+          CONDA_PY: "37"
+          PATTERN: "not slow and not network"
+          LOCALE_OVERRIDE: "zh_CN.UTF-8"
+
+        py36_locale_slow:
+          ENV_FILE: ci/deps/azure-36-locale_slow.yaml
+          CONDA_PY: "36"
+          PATTERN: "not slow and not network"
+          LOCALE_OVERRIDE: "it_IT.UTF-8"
 
   steps:
     - script: |
@@ -39,7 +57,7 @@ jobs:
     - task: PublishTestResults@2
       inputs:
         testResultsFiles: 'test-data-*.xml'
-        testRunTitle: 'MacOS-35'
+        testRunTitle: ${{ format('{0}-$(CONDA_PY)', parameters.name) }}
     - powershell: |
         $junitXml = "test-data-single.xml"
         $(Get-Content $junitXml | Out-String) -match 'failures="(.*?)"'

ci/azure/macos.yml renamed to ci/azure/posix.yml

@@ -7,18 +7,28 @@ jobs:
   pool:
     vmImage: ${{ parameters.vmImage }}
   strategy:
-    maxParallel: 11
     matrix:
       py36_np14:
         ENV_FILE: ci/deps/azure-windows-36.yaml
         CONDA_PY: "36"
 
+      py27_np121:
+        ENV_FILE: ci/deps/azure-windows-27.yaml
+        CONDA_PY: "27"
+
   steps:
     - task: CondaEnvironment@1
       inputs:
         updateConda: no
         packageSpecs: ''
 
+    - powershell: |
+        $wc = New-Object net.webclient
+        $wc.Downloadfile("https://download.microsoft.com/download/7/9/6/796EF2E4-801B-4FC4-AB28-B59FBF6D907B/VCForPython27.msi", "VCForPython27.msi")
+        Start-Process "VCForPython27.msi" /qn -Wait
+      displayName: 'Install VC 9.0 only for Python 2.7'
+      condition: eq(variables.CONDA_PY, '27')
+
     - script: |
         ci\\incremental\\setup_conda_environment.cmd
       displayName: 'Before Install'
@@ -33,7 +43,7 @@ jobs:
     - task: PublishTestResults@2
       inputs:
         testResultsFiles: 'test-data.xml'
-        testRunTitle: 'Windows 36'
+        testRunTitle: 'Windows-$(CONDA_PY)'
     - powershell: |
         $junitXml = "test-data.xml"
         $(Get-Content $junitXml | Out-String) -match 'failures="(.*?)"'