[CI] Update cpplint script to support revision-based linting

.pre-commit-config.yaml

@@ -77,9 +77,9 @@ repos:
             language: system
             files: \.(c|cc|cpp|h|hpp)$
             pass_filenames: false
-        -   id: run-mypy
-            name: Type Checking with MyPY ...
-            entry: docker/lint.sh mypy
-            language: system
-            files: \.py$
-            pass_filenames: false
+        # -   id: run-mypy
+        #     name: Type Checking with MyPY ...
+        #     entry: docker/lint.sh mypy
+        #     language: system
+        #     files: \.py$
+        #     pass_filenames: false

docker/lint.sh

@@ -52,7 +52,11 @@ function run_lint_step() {
             fi
             ;;
         cpplint)
-            cmd=( tests/lint/cpplint.sh )
+            if [ $inplace_fix -eq 0 ]; then
+                cmd=( tests/lint/cpplint.sh )
+            else
+                cmd=( tests/lint/cpplint.sh --rev origin/main )
+            fi
             ;;
         flake8)
             if [ $inplace_fix -eq 0 ]; then

tests/lint/cpplint.sh

@@ -18,20 +18,67 @@
 
 set -e
 
-echo "Running 2 cpplints..."
-python3 3rdparty/dmlc-core/scripts/lint.py --quiet tvm cpp \
-	include src \
-	examples/extension/src examples/graph_executor/src \
-	tests/cpp tests/crt \
-	--exclude_path  "src/runtime/hexagon/rpc/hexagon_rpc.h" \
-			"src/runtime/hexagon/rpc/hexagon_rpc_skel.c" \
-			"src/runtime/hexagon/rpc/hexagon_rpc_stub.c" \
+LINT_ALL_FILES=true
+REVISION=
 
+while (( $# )); do
+    case "$1" in
+        --rev)
+            LINT_ALL_FILES=false
+            REVISION=$2
+            shift 2
+            ;;
+        *)
+            echo "Usage: tests/lint/cpplint.sh [--rev <commit>]"
+            exit 1
+            ;;
+    esac
+done
+
+if [[ "$LINT_ALL_FILES" == "true" ]]; then
+    echo "Running 2 cpplints..."
+    python3 3rdparty/dmlc-core/scripts/lint.py --quiet tvm cpp \
+        include src \
+        examples/extension/src examples/graph_executor/src \
+        tests/cpp tests/crt \
+        --exclude_path  "src/runtime/hexagon/rpc/hexagon_rpc.h" \
+                "src/runtime/hexagon/rpc/hexagon_rpc_skel.c" \
+                "src/runtime/hexagon/rpc/hexagon_rpc_stub.c" \
+
+else
+    echo "Running cpplint on changed files..."
+    # Get changed files, filtering by the directories we care about
+    # We use git diff to find changes.
+    # We filter for the directories: include, src, examples/extension/src, examples/graph_executor/src, tests/cpp, tests/crt
+
+    # grep pattern construction
+    DIRS="include|src|examples/extension/src|examples/graph_executor/src|tests/cpp|tests/crt"
+
+    # Read files into array
+    IFS=$'\n' read -a FILES -d'\n' < <(git diff --name-only --diff-filter=ACMRTUX $REVISION | grep -E "^($DIRS)/" ) || true
+
+    # Filter out excluded files
+    FILTERED_FILES=()
+    for f in "${FILES[@]}"; do
+        if [[ "$f" == "src/runtime/hexagon/rpc/hexagon_rpc.h" ]] || \
+           [[ "$f" == "src/runtime/hexagon/rpc/hexagon_rpc_skel.c" ]] || \
+           [[ "$f" == "src/runtime/hexagon/rpc/hexagon_rpc_stub.c" ]]; then
+            continue
+        fi
+        FILTERED_FILES+=("$f")
+    done
+
+    if [ ${#FILTERED_FILES[@]} -eq 0 ]; then
+        echo "No changes in C++ files"
+    else
+        python3 3rdparty/dmlc-core/scripts/lint.py --quiet tvm cpp "${FILTERED_FILES[@]}"
+    fi
+fi
 
 if find src -name "*.cc" -exec grep -Hn '^#include <regex>$' {} +; then
     echo "The <regex> header file may not be used in TVM," 1>&2
     echo "because it causes ABI incompatibility with most pytorch installations." 1>&2
-    echo "Pytorch packages on PyPI currently set `-DUSE_CXX11_ABI=0`," 1>&2
+    echo "Pytorch packages on PyPI currently set \`-DUSE_CXX11_ABI=0\`," 1>&2
     echo "which causes ABI compatibility when calling <regex> functions." 1>&2
     echo "See https://github.com/pytorch/pytorch/issues/51039 for more details." 1>&2
     exit 1