c_languages: Add CPPCheckBear

References coala#389

.ci/deps.sh

@@ -15,7 +15,7 @@ sudo add-apt-repository -y ppa:staticfloat/juliareleases
 sudo add-apt-repository -y ppa:staticfloat/julia-deps
 sudo add-apt-repository -y ppa:avsm/ppa
 sudo apt-get -y update
-deps="espeak libclang1-3.4 indent mono-mcs chktex hlint r-base julia luarocks verilator"
+deps="espeak libclang1-3.4 indent mono-mcs chktex hlint r-base julia luarocks verilator cppcheck"
 deps_python_dbus="libdbus-glib-1-dev libdbus-1-dev"
 deps_python_gi="glib2.0-dev gobject-introspection libgirepository1.0-dev python3-cairo-dev"
 deps_perl="perl libperl-critic-perl"

bears/c_languages/CPPCheckBear.py

@@ -0,0 +1,38 @@
+from coalib.bearlib.abstractions.Linter import linter
+from coalib.results.RESULT_SEVERITY import RESULT_SEVERITY
+from coalib.settings.Setting import typed_list
+
+
+@linter(executable="cppcheck",
+        use_stdout=False,
+        use_stderr=True,
+        output_format="regex",
+        output_regex=r'(?P<line>\d+):(?P<severity>[a-zA-Z]+):'
+                     r'(?P<origin>[a-zA-Z]+):(?P<message>.*)',
+        severity_map={"error": RESULT_SEVERITY.MAJOR,
+                      "warning": RESULT_SEVERITY.NORMAL,
+                      "style": RESULT_SEVERITY.INFO})
+class CPPCheckBear:
+    """
+    Report possible security weaknesses for C/C++.
+    For more information, consult <https://github.com/danmar/cppcheck>.
+    """
+
+    LANGUAGES = "C", "C++"
+
+    @staticmethod
+    def create_arguments(filename, file, config_file,
+                         enable: typed_list(str)=[]):
+        """
+        :param enable:
+            Choose specific issues to report. Issues that can be
+            reported are: all, warning, style, performance,
+            portability, information, unusedFunction,
+            missingInclude
+        """
+        args = ("--template={line}:{severity}:{id}:{message}",)
+
+        if enable:
+            args += ('--enable=' + ",".join(enable),)
+
+        return args + (filename,)

tests/c_languages/CPPCheckBearTest.py

@@ -0,0 +1,37 @@
+from bears.c_languages.CPPCheckBear import CPPCheckBear
+from tests.LocalBearTestHelper import verify_local_bear
+
+good_file = """
+using namespace std;
+int main() {
+    cout << "Hello, world!" << endl;
+    return 0;
+}""".splitlines(keepends=True)
+
+warn_file = """
+void f1(struct fred_t *p)
+{
+    int x;
+    if (p)
+        do_something(x);
+}""".splitlines(keepends=True)
+
+bad_file = """
+#define f(c) { \
+    char *p = new char[10];  \
+    p[c] = 42; \
+}
+int main() {
+    f(100);
+    return 0;
+}""".splitlines(keepends=True)
+
+
+CPPCheckBearTest1 = verify_local_bear(CPPCheckBear,
+                                      valid_files=(good_file, warn_file),
+                                      invalid_files=(bad_file,))
+
+CPPCheckBearTest2 = verify_local_bear(CPPCheckBear,
+                                      valid_files=(good_file,),
+                                      invalid_files=(warn_file, bad_file),
+                                      settings={'enable': 'unusedFunction'})