Update PR action

Author: nojaf

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "fsdocs-tool": {
-      "version": "17.0.0",
+      "version": "19.0.0",
       "commands": [
         "fsdocs"
       ]

.github/workflows/pr.yml

@@ -5,28 +5,41 @@ on:
     branches:
       - '**'
 
+env:
+  FSHARP_DIR: fsharp
+
 jobs:
   build:
 
     strategy:
       matrix:
-        os: [windows-latest]
+        os: [ubuntu-latest]
         dotnet: [6.0.400]
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Setup .NET
+      - uses: actions/checkout@v3
+      - name: Checkout fsharp main
+        uses: actions/checkout@v3
+        with:
+          repository: dotnet/fsharp
+          path: ${{ env.FSHARP_DIR }}
+          ref: main
+    - name: Setup .NET for FSharp
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 7.0.100
+        global-json-file: ${{ env.FSHARP_DIR }}/global.json
     - name: Restore tools
       run: dotnet tool restore
-    - name: Restore projects
-      run: dotnet restore FSharp.Compiler.Service\FSharp.Compiler.Service.fsproj
-    - name: Checkout fsharp master
-      run: git clone https://github.com/dotnet/fsharp --depth 1 fsharp -b main
-    - name: Build fsharp master (turn of CI build status)
-      run: cd fsharp && eng\CIBuild.cmd  -noVisualStudio
+
+    - name: Build FCS
+      run: dotnet build src/Compiler/FSharp.Compiler.Service.fsproj /p:BUILDING_USING_DOTNET=true
+      working-directory: ${{ env.FSHARP_DIR }}
+
     - name: Run fsdocs
+      env:
+            # allow roll forward to latest major version - this would happen for us if we invoked the fsdocs tool instead of invoking the binary directly
+            DOTNET_ROLL_FORWARD: "LatestMajor"
+            # need previews because .NET 8 is what's being used at runtime
+            DOTNET_ROLL_FORWARD_TO_PRERELEASE: "1"
       run: dotnet fsdocs build --sourcefolder fsharp --input fsharp/docs

.gitignore

@@ -9,4 +9,4 @@ FSharp.Formatting/
 .fsdocs/
 FSharp.Compiler.Service/obj/
 tmp/
-
+output/