Add initial regression script

.editorconfig

@@ -6,4 +6,7 @@ fsharp_keep_max_number_of_blank_lines=1
 fsharp_blank_lines_around_nested_multiline_expressions=false
 
 [docs/**/*.fsx]
-fsharp_keep_max_number_of_blank_lines=1
+fsharp_keep_max_number_of_blank_lines=1
+
+[tests/*.fsx]
+fsharp_multiline_block_brackets_on_same_column = true

.github/workflows/regressions.yml

@@ -0,0 +1,14 @@
+name: regressions
+
+on: workflow_dispatch
+
+jobs:
+  run:
+    runs-on: windows-latest
+
+  steps:
+    - uses: actions/checkout@v3
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v3
+    - name: Regressions
+      run: dotnet fsi tests/regressions.fsx

.gitignore

@@ -193,4 +193,8 @@ output/
 **/.fsdocs/cache
 
 # F# Compiler files
-.deps/
+.deps/
+
+# Regression testing
+tests/.repositories/**
+!tests/.repositories/Directory.Build.props

tests/.repositories/Directory.Build.props

@@ -0,0 +1,3 @@
+<Project>
+    <!-- Only here so that the default Directory.Build.props will not be used. -->
+</Project>

tests/configuration.fsx

@@ -0,0 +1,136 @@
+type Command = { File: string; Arguments: string }
+
+let dotnet =
+    {|
+        restore =
+            {
+                File = "dotnet"
+                Arguments = "restore"
+            }
+        build = { File = "dotnet"; Arguments = "build" }
+        tool =
+            {|
+                restore =
+                    {
+                        File = "dotnet"
+                        Arguments = "tool restore"
+                    }
+            |}
+        paket =
+            {|
+                restore =
+                    {
+                        File = "dotnet"
+                        Arguments = "paket restore"
+                    }
+            |}
+    |}
+
+type Repository =
+    {
+        Name: string
+        GitUrl: string
+        Commit: string
+        Prepare: Command list
+        Build: Command list
+        Format: string list
+    }
+
+let repositories =
+    [
+        {
+            Name = "fantomas"
+            GitUrl = "https://github.com/fsprojects/fantomas"
+            Commit = "3dc34284a4f385f2773fedcc91cd8b9736a4d970"
+            Prepare = [ dotnet.restore ]
+            Build = [ dotnet.build ]
+            Format = [ "src"; "build.fsx"; "docs" ]
+        }
+        {
+            Name = "fsautocomplete"
+            GitUrl = "https://github.com/fsharp/fsautocomplete"
+            Commit = "d74332594a29b8bae412032a2e75a4818f7a633f"
+            Prepare =
+                [
+                    dotnet.tool.restore
+                    dotnet.restore
+                    {
+                        File = "dotnet"
+                        Arguments = "run --project build -t ReplaceFsLibLogNamespaces"
+                    }
+                ]
+            Build = [ dotnet.build ]
+            Format = [ "src" ]
+        }
+        {
+            Name = "fsharp"
+            GitUrl = "https://github.com/dotnet/fsharp"
+            Commit = "0677fc2f7d0612388351d035480005af4d90ad49"
+            Prepare = []
+            Build =
+                [
+                    {
+                        File = "Build.cmd"
+                        Arguments = "-noVisualStudio"
+                    }
+                ]
+            Format = [ "src" ]
+        }
+        {
+            Name = "FSharp.Formatting"
+            GitUrl = "https://github.com/fsprojects/FSharp.Formatting"
+            Commit = "bd0ba65c5dcc8cfc081562435c507a5cfb84cb88"
+            Prepare =
+                [
+                    dotnet.tool.restore
+                    dotnet.restore
+                    dotnet.paket.restore
+                    {
+                        File = "dotnet"
+                        Arguments = "run --project ./build/build.fsproj -t AssemblyInfo"
+                    }
+                ]
+            Build = [ dotnet.build ]
+            Format = [ "src"; "tests"; "docs"; "build" ]
+        }
+        {
+            Name = "plotly"
+            GitUrl = "https://github.com/plotly/Plotly.NET"
+            Commit = "97a6b687fca0ebcba73c3ffb0d19788e6a668376"
+            Prepare = [ dotnet.tool.restore; dotnet.restore ]
+            Build = [ dotnet.build ]
+            Format = [ "src" ]
+        }
+        {
+            Name = "ApiSurface"
+            GitUrl = "https://github.com/G-Research/ApiSurface"
+            Commit = "49520f35806e38492da75501063dae90687e10c7"
+            Prepare = [ dotnet.tool.restore; dotnet.restore ]
+            Build = [ dotnet.build ]
+            Format = [ "." ]
+        }
+        {
+            Name = "farmer"
+            GitUrl = "https://github.com/CompositionalIT/farmer"
+            Commit = "4702b7db2ae661706ecda3bad83206897e0a3f93"
+            Prepare = [ dotnet.restore ]
+            Build = [ dotnet.build ]
+            Format = [ "src"; "samples" ]
+        }
+        {
+            Name = "IcedTasks"
+            GitUrl = "https://github.com/TheAngryByrd/IcedTasks"
+            Commit = "8ee97f9c0b6c7cedbde3edd3ae6ad96f7d68dac6"
+            Prepare = [ dotnet.tool.restore; dotnet.paket.restore ]
+            Build = [ dotnet.build ]
+            Format = [ "src" ]
+        }
+        {
+            Name = "FSharp.Data"
+            GitUrl = "https://github.com/fsprojects/FSharp.Data"
+            Commit = "dae308988c1ae43368508ec65e2ce4c58b59406a"
+            Prepare = [ dotnet.tool.restore; dotnet.paket.restore ]
+            Build = [ dotnet.build ]
+            Format = [ "src"; "build.fsx" ]
+        }
+    ]