ci: add azure pipelines

azure-pipelines.yml

@@ -0,0 +1,25 @@
+variables:
+  buildConfiguration: Release
+  buildTag: $[ startsWith(variables['Build.SourceBranch'], 'refs/tags') ]
+  buildNumber: $[ variables('Build.BuildNumber') ]
+
+
+jobs:
+- job: Linux
+  pool:
+    vmImage: 'ubuntu-16.04'
+  steps:
+  - template: azure/build.yml
+
+- job: Windows
+  pool:
+    vmImage: 'vs2017-win2016'
+  steps:
+  - template: azure/build.yml
+  - template: azure/deploy.yml
+    # TODO: condition check for dev branch
+    condition: |
+      and (
+        succeeded(),
+        eq(variables['Build.SourceBranch'], 'refs/heads/ci/azure')
+      )

azure/build.yml

@@ -0,0 +1,19 @@
+steps:
+- task: DotNetCoreCLI@2
+  inputs:
+    command: restore
+    projects: 'Discord.Net.sln'
+
+- task: DotNetCoreCLI@2
+  inputs:
+    command: build
+    projects: 'Discord.Net.sln'
+    configuration: $(buildConfiguration)
+    arguments: '/p:BuildNumber=$(buildNumber) /p:IsTagBuild=$(buildTag)'
+
+- task: DotNetCoreCLI@2
+  inputs:
+    command: test
+    projects: './test/**/*.csproj'
+    configuration: $(buildConfiguration)
+    nobuild: True

azure/deploy.yml

@@ -0,0 +1,12 @@
+steps:
+- task: DotNetCoreCLI@2
+  inputs:
+    command: 'pack'
+    projects: 'Discord.Net.sln'
+    configuration: $(buildConfiguration)
+    nobuild: True
+    arguments: '/p:BuildNumber=$(buildNumber) /p:IsTagBuild=$(buildTag)'
+
+    # TODO: build nuspec
+
+- task: PublishBuildArtifacts@1