ci(vcpkg): Switch binary cache from local files to GitHub Packages NuGet feed

.github/workflows/build-toolchain.yml

@@ -3,6 +3,7 @@ name: Build Toolchain
 permissions:
   contents: read
   pull-requests: write
+  packages: write
 
 on:
   workflow_call:
@@ -33,8 +34,8 @@ jobs:
     timeout-minutes: 30
 
     env:
-      VCPKG_FILE_CACHE: ${{ github.workspace }}\vcpkg-bincache
-      VCPKG_BINARY_SOURCES: clear;files,${{ github.workspace }}\vcpkg-bincache,readwrite
+      VCPKG_BINARY_SOURCES: "clear;nuget,https://nuget.pkg.github.com/${{ github.repository_owner }}/index.json,readwrite"
+      VCPKG_NUGET_REPOSITORY: "https://github.com/${{ github.repository }}.git"
       VCPKG_FEATURE_FLAGS: manifests,versions,binarycaching
 
     steps:
@@ -105,51 +106,25 @@ jobs:
         with:
           arch: x86
 
-      - name: Compute vcpkg cache key parts
-        if: startsWith(inputs.preset, 'win32')
-        id: vcpkg_key
-        shell: pwsh
-        run: |
-          $baseline = (Get-Content vcpkg.json | ConvertFrom-Json)."builtin-baseline"
-
-          $triplet = "x86-windows"
-          if ("${{ inputs.preset }}" -like "x64*") { $triplet = "x64-windows" }
-
-          "baseline=$baseline" >> $env:GITHUB_OUTPUT
-          "triplet=$triplet" >> $env:GITHUB_OUTPUT
-
-          Write-Host "vcpkg cache key parts: baseline=$baseline, triplet=$triplet"
-
-      - name: Restore vcpkg binary cache
-        if: startsWith(inputs.preset, 'win32')
-        id: vcpkg_cache
-        uses: actions/cache/restore@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
-        with:
-          path: ${{ github.workspace }}\vcpkg-bincache
-          key: vcpkg-bincache-v3-${{ runner.os }}-baseline${{ steps.vcpkg_key.outputs.baseline }}-${{ steps.vcpkg_key.outputs.triplet }}-${{ hashFiles('triplets/*.cmake') }}
-          restore-keys: |
-            vcpkg-bincache-v3-${{ runner.os }}-baseline${{ steps.vcpkg_key.outputs.baseline }}-
-            vcpkg-bincache-v3-${{ runner.os }}-
-
       - name: Setup vcpkg
         uses: lukka/run-vcpkg@5e0cab206a5ea620130caf672fce3e4a6b5666a1 # v11.5
         with:
           runVcpkgInstall: false
           doNotCache: true
 
-      - name: Configure vcpkg to use cached directory
+      - name: Configure NuGet Source for vcpkg Binary Cache
         if: startsWith(inputs.preset, 'win32')
         shell: pwsh
         run: |
-          $cacheDir = "${{ github.workspace }}\vcpkg-bincache"
-          New-Item -ItemType Directory -Force -Path $cacheDir | Out-Null
-
-          # lukka/run-vcpkg sets its own temp cache dir; override to force our cached dir
-          $env:VCPKG_DEFAULT_BINARY_CACHE = $cacheDir
-          $env:VCPKG_BINARY_SOURCES = "clear;files,$cacheDir,readwrite"
-
-          "VCPKG_DEFAULT_BINARY_CACHE=$cacheDir" >> $env:GITHUB_ENV
-          "VCPKG_BINARY_SOURCES=$env:VCPKG_BINARY_SOURCES" >> $env:GITHUB_ENV
+          $nuget = & "$env:VCPKG_ROOT\vcpkg.exe" fetch nuget | Select-Object -Last 1
+          & $nuget sources add `
+            -Source "https://nuget.pkg.github.com/${{ github.repository_owner }}/index.json" `
+            -StorePasswordInClearText `
+            -Name GitHubPackages `
+            -UserName "${{ github.repository_owner }}" `
+            -Password "${{ secrets.GITHUB_TOKEN }}"
+          & $nuget setapikey "${{ secrets.GITHUB_TOKEN }}" `
+            -Source "https://nuget.pkg.github.com/${{ github.repository_owner }}/index.json"
           "VCPKG_OVERLAY_TRIPLETS=${{ github.workspace }}\triplets" >> $env:GITHUB_ENV
           "VCPKG_INSTALL_OPTIONS=--x-abi-tools-use-exact-versions" >> $env:GITHUB_ENV
 
@@ -175,14 +150,6 @@ jobs:
         run: |
           cmake --build --preset ${{ inputs.preset }}
 
-      - name: Save vcpkg binary cache
-        # Only one job should save to avoid "Unable to reserve cache" conflicts.
-        if: ${{ startsWith(inputs.preset, 'win32') && steps.vcpkg_cache.outputs.cache-hit != 'true' && inputs.game == 'Generals' && inputs.preset == 'win32-vcpkg-debug' }}
-        uses: actions/cache/save@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5.0.3
-        with:
-          path: ${{ github.workspace }}\vcpkg-bincache
-          key: vcpkg-bincache-v3-${{ runner.os }}-baseline${{ steps.vcpkg_key.outputs.baseline }}-${{ steps.vcpkg_key.outputs.triplet }}-${{ hashFiles('triplets/*.cmake') }}
-
       - name: Collect ${{ inputs.game }} ${{ inputs.preset }}${{ inputs.tools && '+t' || '' }}${{ inputs.extras && '+e' || '' }} Artifact
         shell: pwsh
         run: |

.github/workflows/ci.yml

@@ -3,6 +3,7 @@ name: GenCI
 permissions:
   contents: read
   pull-requests: write
+  packages: write
 
 on:
   push: