Add support for a [CI BUILD DEV] to build Development builds (#712)

Note that this does not need to also contain the regular [xCI BUILDx]
command, and indeed, if this is part of a pull request, it should not
(as then it will build twice).

Also note that we currently have 11 builds, but only 20 available
workers, which means that enabling Development builds will require a
second round of builds. The queuing system will handle this
automatically, but it will take longer.

This commit also adds a dummy list of names to prevent the includes from
overwriting each other. This is a quirk of Github matrices, whereby if
there's *just* an include: list, it will copy them as-is, but once
there's a predefined matrix, then include will overwrite, rather than
append, anything with a matching key. By priming the list with the
names, even without any of the config, we ensure that none will be
skipped, and we just use the include list for the configurations.

.github/workflows/build.yml

@@ -43,6 +43,7 @@ jobs:
       fastlanelane: ${{ steps.version.outputs.fastlanelane}}
       uid: ${{ steps.github.outputs.uid }}
       gid: ${{ steps.github.outputs.gid }}
+      flavors: ${{ steps.flavors.outputs.flavors }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -155,14 +156,28 @@ jobs:
           fi
           echo "uid=$(id -u)" >> $GITHUB_OUTPUT
           echo "gid=$(id -g)" >> $GITHUB_OUTPUT
+
+      - name: Determine whether to build Development builds or not
+        id: flavors
+        run: |
+          set -x
+          if [[ $(git log --format=%B ${{ github.event.pull_request.head.sha }} -1) == *'[CI BUILD DEV]'* ]]
+          then
+            echo 'flavors=[{"development": true, "title": "Development"}, {"development": false}]' >> $GITHUB_OUTPUT
+
+          else
+            echo 'flavors=[{"development": false}]' >> $GITHUB_OUTPUT
+          fi
+
   build:
-    name: ${{ matrix.name }}
+    name: ${{ matrix.name }} ${{ matrix.flavors.title }}
     needs: configuration
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        # We don't use an actual matrix because there's more exceptions than actual cases!
+        flavors: ${{ fromJson(needs.configuration.outputs.flavors) }}
+        name: [Windows OpenXR, Windows Pimax, Windows Rift, Linux, MacOS, Android OpenXR, Oculus Quest (1), Oculus Quest (2+), Android Pico, Android Pico (CN), iOS Zapbox]  # These will all be overwritten, but because we have the flavors matrix as well, we can't just add configurations via include; they'll overwrite each other. This way ensures that we get each one
         include:
           - name: Windows OpenXR
             targetPlatform: StandaloneWindows64
@@ -275,7 +290,7 @@ jobs:
           lfs: true  # We don't use LFS, but it adds no time, and leave it here in case we do at some point later
 
       - name: Install Pimax unity package
-        if: matrix.name == 'Windows Pimax'
+        if: startsWith(matrix.name, 'Windows Pimax')
         run: |
           # version 0.6.3
           # Same as above, but adapted to work for Pimax instead.
@@ -401,6 +416,11 @@ jobs:
         run: |
           echo "stamp=-btb-stamp ${{needs.configuration.outputs.stamp}}" >> $GITHUB_ENV
 
+      - name: Enable Development Mode
+        if: ${{ matrix.flavors.development == true }}
+        run: |
+          echo "btbbopts=-btb-bopt Development" >> $GITHUB_ENV
+
       - name: Update version
         env:
           VERSION: ${{ needs.configuration.outputs.version}}
@@ -445,7 +465,7 @@ jobs:
           allowDirtyBuild: true  # Because of the OVR Update, the build tree might be dirty
           unityVersion: ${{ env.UNITY_VERSION }}
           targetPlatform: ${{ matrix.targetPlatform }}
-          customParameters: -btb-target ${{ matrix.targetPlatform }} -btb-display ${{ matrix.vrsdk }} -btb-out /github/workspace/build/${{ matrix.vrsdk }}/${{ matrix.targetPlatform }}/${{ env.filename }} ${{ needs.configuration.outputs.description}} ${{ env.stamp }} ${{ matrix.extraoptions }}
+          customParameters: -btb-target ${{ matrix.targetPlatform }} -btb-display ${{ matrix.vrsdk }} -btb-out /github/workspace/build/${{ matrix.vrsdk }}/${{ matrix.targetPlatform }}/${{ env.filename }} ${{ needs.configuration.outputs.description}} ${{ env.stamp }} ${{ env.btbbopts }} ${{ matrix.extraoptions }}
           versioning: Custom
           androidVersionCode: "${{ needs.configuration.outputs.androidVersionCode }}${{ matrix.versionSuffix }}"
           version: ${{ needs.configuration.outputs.version }}
@@ -485,7 +505,7 @@ jobs:
           allowDirtyBuild: true  # Because of the OVR Update, the build tree might be dirty
           unityVersion: ${{ env.UNITY_VERSION }}
           targetPlatform: ${{ matrix.targetPlatform }}
-          customParameters: -btb-target ${{ matrix.targetPlatform }} -btb-display ${{ matrix.vrsdk }} -btb-out /github/workspace/build/${{ matrix.vrsdk }}/${{ matrix.targetPlatform }}/${{ env.filename }} ${{ needs.configuration.outputs.description}} ${{ env.stamp }} ${{ matrix.extraoptions }}
+          customParameters: -btb-target ${{ matrix.targetPlatform }} -btb-display ${{ matrix.vrsdk }} -btb-out /github/workspace/build/${{ matrix.vrsdk }}/${{ matrix.targetPlatform }}/${{ env.filename }} ${{ needs.configuration.outputs.description}} ${{ env.stamp }} ${{ env.btbbopts }} ${{ matrix.extraoptions }}
           versioning: Custom
           androidVersionCode: "${{ needs.configuration.outputs.androidVersionCode }}${{ matrix.versionSuffix }}"
           version: ${{ needs.configuration.outputs.version }}