[ci] add lint CI

Signed-off-by: Avimitin <[email protected]>

.github/workflows/lint.yml

@@ -0,0 +1,69 @@
+name: Code linting
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - ready_for_review
+      - labeled
+env:
+  USER: runner
+
+# Cancel the current workflow when new commit pushed
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  checkfmt:
+    name: "Check formats"
+    strategy:
+      fail-fast: false
+    runs-on: [self-hosted, linux, nixos]
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{ github.head_ref }}
+      - name: "Run testcases"
+        run: |
+          RET=0
+          warnOnFileChanged() {
+            if ! git diff -q --exit-code; then
+              RET=1
+              local msg="$1"; shift
+              echo "$msg"
+              echo "$msg" >> $GITHUB_STEP_SUMMARY
+              git reset --hard
+            fi
+          }
+
+          nix develop '.#t1.elaborator' -c mill -i _.reformat
+          warnOnFileChanged "* Scala format fail, please run 'nix develop '.#t1.elaborator' -c mill -i _.reformat'"
+
+          nix fmt
+          warnOnFileChanged "* Nix format fail, please run 'nix fmt'"
+
+          pushd difftest
+          nix run '.#cargo' -- format
+          warnOnFileChanged "* Cargo format fail, please run 'cd difftest; nix run .#cargo -- format'"
+          popd
+
+          pushd t1rocketemu
+          nix run '.#cargo' -- format
+          warnOnFileChanged "* Cargo format fail, please run 'cd t1rocketemu; nix run .#cargo -- format'"
+          popd
+
+          if nix run '.#rg' -- '\p{Script=Han}' > zh-hans.txt; then
+            RET=1
+            msg="* Found ZH_CN comments"
+            echo "$msg"
+            echo "$msg" >> $GITHUB_STEP_SUMMARY
+            echo "```text" >> $GITHUB_STEP_SUMMARY
+            cat zh-hans.txt >> $GITHUB_STEP_SUMMARY
+            echo "```" >> $GITHUB_STEP_SUMMARY
+            git reset --hard
+          fi
+
+          exit $RET