gitlab builds on windows

what's left:
  - github build progress notifications (need to upgrade to Gitlab Silver for this)
  - github releases
  - uploading coverage results to codecov.io
  - what directories to cache between builds

.gitlab-ci.yml

@@ -119,6 +119,33 @@ build:mac:
   after_script:
     - rm -rf "${VENV}"
 
+build:windows:
+  extends: .build
+  tags: [windows] # makes gitlab use the windows runner
+  variables:
+    OS: windows
+    GIT_DEPTH: 5
+  before_script:
+    - ./build/install_choco.ps1
+    - choco install -y --x86 python3 7zip checksum
+#    - python --version | findstr /B "Python 3\.7\." # dont upgrade python on every run. just make sure we're on the right Python
+#    - pip --version | findstr /E '\(python 3\.7\)'
+    - pip install virtualenv pywin32
+    - virtualenv venv
+    - venv/Scripts/activate.ps1
+  after_script:
+    - rmdir -Recurse venv
+  script:
+    - pip install pyinstaller
+    - pip install -e torba\.
+    - cd lbry
+    - python scripts\set_build.py
+    - pip install -e .
+    - pyinstaller --additional-hooks-dir=scripts/. --icon=icons/lbry256.ico -F -n lbrynet lbry/extras/cli.py
+    - cd dist
+    - 7z a -tzip $env:CI_PROJECT_DIR/lbrynet-${OS}.zip lbrynet.exe
+    - checksum --type=sha256 --file=$env:CI_PROJECT_DIR/lbrynet-${OS}.zip
+    - ./lbrynet.exe --version
 
 
 # upload could be done by making it a yaml alias and putting it right into the build step. that way if one OS fails, the others still get uploaded
@@ -146,6 +173,13 @@ s3:mac:
   dependencies:
     - build:mac
 
+s3:windows:
+  extends: .upload
+  variables:
+    OS: windows
+  dependencies:
+    - build:windows
+
 #release:linux:
 #  stage: release
 #  only: [tags]

build/install_choco.ps1

@@ -0,0 +1,11 @@
+# requires powershell and .NET 4+. see https://chocolatey.org/install for more info.
+
+$chocoVersion = powershell choco -v
+if(-not($chocoVersion)){
+    Write-Output "Chocolatey is not installed, installing now"
+    Write-Output "IF YOU KEEP GETTING THIS MESSAGE ON EVERY BUILD, TRY RESTARTING THE GITLAB RUNNER SO IT GETS CHOCO INTO IT'S ENV"
+    Set-ExecutionPolicy Bypass -Scope Process -Force; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))
+}
+else{
+    Write-Output "Chocolatey version $chocoVersion is already installed"
+}