Fix lint errors. (#9634)

.github/workflows/main.yml

@@ -144,15 +144,9 @@ jobs:
         python -m pip install wheel setuptools cpplint pylint
     - name: Run lint
       run: |
-        python3 dmlc-core/scripts/lint.py xgboost cpp R-package/src
+        python3 tests/ci_build/lint_cpp.py xgboost cpp R-package/src
 
-        python3 dmlc-core/scripts/lint.py --exclude_path \
-            python-package/xgboost/dmlc-core \
-            python-package/xgboost/include \
-            python-package/xgboost/lib \
-            python-package/xgboost/rabit \
-            python-package/xgboost/src \
-            --pylint-rc python-package/.pylintrc \
-            xgboost \
-            cpp \
-            include src python-package
+        python3 tests/ci_build/lint_cpp.py xgboost cpp include src python-package \
+            --exclude_path python-package/xgboost/dmlc-core python-package/xgboost/include \
+                           python-package/xgboost/lib python-package/xgboost/rabit \
+                           python-package/xgboost/src

python-package/xgboost/spark/estimator.py

@@ -198,7 +198,7 @@ class SparkXGBRegressor(_SparkXGBEstimator):
     """
 
     @keyword_only
-    def __init__(
+    def __init__(  # pylint:disable=too-many-arguments
         self,
         *,
         features_col: Union[str, List[str]] = "features",
@@ -376,7 +376,7 @@ class SparkXGBClassifier(_SparkXGBEstimator, HasProbabilityCol, HasRawPrediction
     """
 
     @keyword_only
-    def __init__(
+    def __init__(  # pylint:disable=too-many-arguments
         self,
         *,
         features_col: Union[str, List[str]] = "features",
@@ -566,7 +566,7 @@ class SparkXGBRanker(_SparkXGBEstimator):
     """
 
     @keyword_only
-    def __init__(
+    def __init__(  # pylint:disable=too-many-arguments
         self,
         *,
         features_col: Union[str, List[str]] = "features",

tests/ci_build/lint_cpp.py

@@ -0,0 +1,166 @@
+import argparse
+import os
+import re
+import sys
+
+import cpplint
+from cpplint import _cpplint_state
+
+CXX_SUFFIX = set(["cc", "c", "cpp", "h", "cu", "hpp"])
+
+
+def filepath_enumerate(paths):
+    """Enumerate the file paths of all subfiles of the list of paths"""
+    out = []
+    for path in paths:
+        if os.path.isfile(path):
+            out.append(path)
+        else:
+            for root, dirs, files in os.walk(path):
+                for name in files:
+                    out.append(os.path.normpath(os.path.join(root, name)))
+    return out
+
+
+def get_header_guard_dmlc(filename):
+    """Get Header Guard Convention for DMLC Projects.
+
+    For headers in include, directly use the path
+    For headers in src, use project name plus path
+
+    Examples: with project-name = dmlc
+        include/dmlc/timer.h -> DMLC_TIMTER_H_
+        src/io/libsvm_parser.h -> DMLC_IO_LIBSVM_PARSER_H_
+    """
+    fileinfo = cpplint.FileInfo(filename)
+    file_path_from_root = fileinfo.RepositoryName()
+    inc_list = ["include", "api", "wrapper", "contrib"]
+    if os.name == "nt":
+        inc_list.append("mshadow")
+
+    if file_path_from_root.find("src/") != -1 and _HELPER.project_name is not None:
+        idx = file_path_from_root.find("src/")
+        file_path_from_root = _HELPER.project_name + file_path_from_root[idx + 3 :]
+    else:
+        idx = file_path_from_root.find("include/")
+        if idx != -1:
+            file_path_from_root = file_path_from_root[idx + 8 :]
+        for spath in inc_list:
+            prefix = spath + "/"
+            if file_path_from_root.startswith(prefix):
+                file_path_from_root = re.sub("^" + prefix, "", file_path_from_root)
+                break
+    return re.sub(r"[-./\s]", "_", file_path_from_root).upper() + "_"
+
+
+class Lint:
+    def __init__(self):
+        self.project_name = "xgboost"
+        self.cpp_header_map = {}
+        self.cpp_src_map = {}
+        self.python_map = {}
+
+        self.pylint_cats = set(["error", "warning", "convention", "refactor"])
+        # setup cpp lint
+        cpplint_args = ["--quiet", "--extensions=" + (",".join(CXX_SUFFIX)), "."]
+        _ = cpplint.ParseArguments(cpplint_args)
+        cpplint._SetFilters(
+            ",".join(
+                [
+                    "-build/c++11",
+                    "-build/include,",
+                    "+build/namespaces",
+                    "+build/include_what_you_use",
+                    "+build/include_order",
+                ]
+            )
+        )
+        cpplint._SetCountingStyle("toplevel")
+        cpplint._line_length = 100
+
+    def process_cpp(self, path, suffix):
+        """Process a cpp file."""
+        _cpplint_state.ResetErrorCounts()
+        cpplint.ProcessFile(str(path), _cpplint_state.verbose_level)
+        _cpplint_state.PrintErrorCounts()
+        errors = _cpplint_state.errors_by_category.copy()
+
+        if suffix == "h":
+            self.cpp_header_map[str(path)] = errors
+        else:
+            self.cpp_src_map[str(path)] = errors
+
+    @staticmethod
+    def _print_summary_map(strm, result_map, ftype):
+        """Print summary of certain result map."""
+        if len(result_map) == 0:
+            return 0
+        npass = sum(1 for x in result_map.values() if len(x) == 0)
+        strm.write(f"====={npass}/{len(result_map)} {ftype} files passed check=====\n")
+        for fname, emap in result_map.items():
+            if len(emap) == 0:
+                continue
+            strm.write(
+                f"{fname}: {sum(emap.values())} Errors of {len(emap)} Categories map={str(emap)}\n"
+            )
+        return len(result_map) - npass
+
+    def print_summary(self, strm):
+        """Print summary of lint."""
+        nerr = 0
+        nerr += Lint._print_summary_map(strm, self.cpp_header_map, "cpp-header")
+        nerr += Lint._print_summary_map(strm, self.cpp_src_map, "cpp-source")
+        if nerr == 0:
+            strm.write("All passed!\n")
+        else:
+            strm.write(f"{nerr} files failed lint\n")
+        return nerr
+
+
+_HELPER = Lint()
+
+cpplint.GetHeaderGuardCPPVariable = get_header_guard_dmlc
+
+
+def process(fname, allow_type):
+    """Process a file."""
+    fname = str(fname)
+    arr = fname.rsplit(".", 1)
+    if fname.find("#") != -1 or arr[-1] not in allow_type:
+        return
+    if arr[-1] in CXX_SUFFIX:
+        _HELPER.process_cpp(fname, arr[-1])
+
+
+def main():
+    parser = argparse.ArgumentParser(description="run cpp lint")
+    parser.add_argument("path", nargs="+", help="path to traverse")
+    parser.add_argument(
+        "--exclude_path",
+        nargs="+",
+        default=[],
+        help="exclude this path, and all subfolders if path is a folder",
+    )
+    args = parser.parse_args()
+    excluded_paths = filepath_enumerate(args.exclude_path)
+
+    allow_type = []
+    allow_type += CXX_SUFFIX
+
+    for path in args.path:
+        if os.path.isfile(path):
+            normpath = os.path.normpath(path)
+            if normpath not in excluded_paths:
+                process(path, allow_type)
+        else:
+            for root, dirs, files in os.walk(path):
+                for name in files:
+                    file_path = os.path.normpath(os.path.join(root, name))
+                    if file_path not in excluded_paths:
+                        process(file_path, allow_type)
+    nerr = _HELPER.print_summary(sys.stderr)
+    sys.exit(nerr > 0)
+
+
+if __name__ == "__main__":
+    main()