CI: Improve build scripts

 * Use latest kolibri stable (0.15.0)
 * Remove kolibri modifications, not needed for 0.15.0
 * Use yarn cache
 * Create a ZIP file and upload to tag if it's a release

The electron app fails to build on windows with large paths and that's
hapenning if we copy the Kolibri folder inside the resources of the
electron app before the build.

This patch does the copy of the Kolibri folder built with kapew after
the electron is built so it won't fail.

The zip compression before uploading as artifact is also a good practice
because when there are a lot of files it could fail, and we can also
upload the zip file automatically to the release if it's a tag.

https://phabricator.endlessm.com/T32867

.github/workflows/main.yml

@@ -2,11 +2,7 @@ name: CI
 
 on:
   push:
-    branches:
-      - master
   pull_request:
-    branches:
-      - master
   workflow_dispatch:
 
 jobs:
@@ -27,30 +23,22 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: '16'
+          cache: 'yarn'
+          cache-dependency-path: '**/yarn.lock'
 
-      - name: Install requirements
+      - name: Install python requirements
         run: |
           pip install wheel
           pip install -r requirements.txt
           pip install -r requirements-win.txt
-          npm install -g yarn
-          yarn global add @electron-forge/cli
 
       - name: Prep kolibri dist
         run: |
-          python kapew.py prep-kolibri-dist --exclude-prereleases --skip-preseed
-
-      - name: Update kolibri.dist.le_utils for kolibri-zim-plugin
-        run: |
-          pip install git+https://github.com/learningequality/le-utils.git@v0.1.34 --target="src\kolibri\dist" --upgrade
-
-      - name: Update kolibri.dist.morango for improved performance on Windows
-        run: |
-          pip install morango==0.5.6 --target="src\kolibri\dist" --upgrade
+          python kapew.py prep-kolibri-dist --skip-preseed --exclude-prereleases
 
       - name: Add kolibri_zim_plugin to Kolibri's dist packages
         run: |
-          pip install kolibri-zim-plugin==1.1.2 --target="src\kolibri\dist"
+          pip install kolibri-zim-plugin --target="src\kolibri\dist"
 
       - name : Patch Kolibri's server code to avoid Windows firewall prompts
         run: |
@@ -60,22 +48,36 @@ jobs:
         run: |
           python kapew.py build
 
-      - name: Add package data files to dist
-        run: |
-          mv src/kolibri dist/win/Kolibri
-          mv dist/win/Kolibri kolibri-electron/src/
+      - name: Install electron-forge
+        working-directory: kolibri-electron
+        run: yarn global add @electron-forge/cli
 
       - name: Install electron dependencies
         working-directory: kolibri-electron
-        run: |
-          yarn install
-          yarn make --arch=ia32
+        run: yarn install
+
+      - name: Build electron app
+        working-directory: kolibri-electron
+        run: yarn make --arch=ia32
 
       - name: Create kolibri-windows
         run: |
           mv kolibri-electron/out/kolibri-electron-win32-ia32 kolibri-windows
 
+          mv src/kolibri dist/win/Kolibri
+          mv dist/win/Kolibri kolibri-windows/resources/app/src/
+
+      - name: Compress
+        run: Compress-Archive -Path kolibri-windows\* -DestinationPath kolibri-windows.zip
+        shell: pwsh
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: kolibri-windows.zip
+
       - uses: actions/upload-artifact@v2
         with:
-          name: "kolibri-windows"
-          path: "kolibri-windows"
+          name: "kolibri-windows.zip"
+          path: "kolibri-windows.zip"