Add workflow to automatically check code style issues for PRs (#4670)

* Add workflow to perform automated checks for PRs

* Downgrade Microsoft.CodeAnalysis to 4.4.0

This is a workaround to fix issues with dotnet-format.
See:
- https://github.com/dotnet/format/issues/1805
- https://github.com/dotnet/format/issues/1800

* Adjust editorconfig to be more compatible with Ryujinx code-style

* Adjust .editorconfig line endings to match .gitattributes

* Disable 'prefer switch expression' rule

* Remove naming styles

These are the default rules, so we don't need to override them.

* Silence IDE0060 in .editorconfig

* Slightly adjust .editorconfig

* Add lost workflow changes

* Move .editorconfig comment to the top

* .editorconfig: private static readonly fields should be _lowerCamelCase

* .editorconfig: Remove alignment for declarations as well

* editorconfig: Add rule for local constants

* Disable CA1822 for HLE services

* Disable CA1822 for ViewModels

Bindings won't work with static members, but this issue is silently ignored.

* Run dotnet format for the whole solution

* Check result code of SDL_GetDisplayBounds

* Fix dotnet format style issues

* Add missing trailing commas

* Update Microsoft.CodeAnalysis.CSharp to 4.6.0

Skipping 4.5.0 since it breaks dotnet format

* Restore old default naming rules for dotnet format

* Add naming rule exception for CPU tests

* checks: Include all files before excluding paths

* Fix dotnet format issues

* Check dotnet format version

* checks: Run dotnet format with severity info again

* checks: Disable naming style rules until they won't crash the process anymore

* Remove unread private member

* checks: Attempt to run analyzers 3 times before giving up

* checks: Enable naming style rules again with the new retry logic

3 files changed, 76 insertions, 12 deletions

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index bf8fd000..c93fd0d3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,19 +1,10 @@
 name: Build job
 
 on:
-  workflow_dispatch:
-    inputs: {}
-  pull_request:
-    branches: [ master ]
-    paths-ignore:
-      - '.github/**'
-      - '*.yml'
-      - '*.json'
-      - '*.config'
-      - 'README.md'
+  workflow_call:
 
 concurrency:
-  group: pr-checks-${{ github.event.number }}
+  group: pr-builds-${{ github.event.number }}
   cancel-in-progress: true
 
 env:
diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
new file mode 100644
index 00000000..c34d196f
--- /dev/null
+++ b/.github/workflows/checks.yml
@@ -0,0 +1,71 @@
+name: Perform checks
+
+on:
+  pull_request:
+    branches: [ master ]
+    paths:
+      - '**'
+      - '!.github/**'
+      - '!*.yml'
+      - '!*.config'
+      - '!README.md'
+      - '.github/workflows/*.yml'
+
+permissions:
+  pull-requests: write
+  checks: write
+
+concurrency:
+  group: pr-checks-${{ github.event.number }}
+  cancel-in-progress: true
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-dotnet@v3
+        with:
+          global-json-file: global.json
+
+      - run: dotnet restore
+
+      - name: Print dotnet format version
+        run: dotnet format --version
+
+      - name: Run dotnet format whitespace
+        run: |
+          dotnet format whitespace --verify-no-changes --report ./whitespace-report.json -v d
+
+      - name: Run dotnet format style
+        run: |
+          dotnet format style --severity info --verify-no-changes --report ./style-report.json -v d
+
+      # For some reason this step sometimes fails with exit code 139 (segfault?),
+      # so should that be the case we'll try again (3 tries max).
+      - name: Run dotnet format analyzers
+        run: |
+          attempt=0
+          exit_code=139
+          until [ $attempt -ge 3 ] || [ $exit_code -ne 139 ]; do
+            ((attempt+=1))
+            exit_code=0
+            echo "Attempt: ${attempt}/3"
+            dotnet format analyzers --severity info --verify-no-changes --report ./analyzers-report.json -v d || exit_code=$?
+          done
+          exit $exit_code
+
+      - name: Upload report
+        if: failure()
+        uses: actions/upload-artifact@v3
+        with:
+          name: dotnet-format
+          path: ./*-report.json
+
+  pr_build:
+    uses: ./.github/workflows/build.yml
+    needs: format
+    secrets: inherit
diff --git a/.github/workflows/nightly_pr_comment.yml b/.github/workflows/nightly_pr_comment.yml
index deabae67..f59a6be1 100644
--- a/.github/workflows/nightly_pr_comment.yml
+++ b/.github/workflows/nightly_pr_comment.yml
@@ -1,8 +1,10 @@
 name: Comment PR artifacts links
+
 on:
   workflow_run:
-    workflows: ['Build job']
+    workflows: ['Perform checks']
     types: [completed]
+
 jobs:
   pr_comment:
     if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'