Strengthen lint target

.clang-tidy

@@ -0,0 +1,17 @@
+Checks: >
+  *,
+  -*-magic-numbers,
+  -*-narrowing-conversions,
+  -*-uppercase-literal-suffix,
+  -bugprone-macro-parentheses,
+  -clang-analyzer-valist.Unterminated,
+  -clang-diagnostic-empty-translation-unit,
+  -clang-diagnostic-unused-function,
+  -clang-diagnostic-unused-macros,
+  -cppcoreguidelines-init-variables,
+  -hicpp-signed-bitwise,
+  -llvm-header-guard,
+  -readability-else-after-return,
+WarningsAsErrors: '*'
+HeaderFilterRegex: '.*'
+FormatStyle: file

wscript

@@ -4,7 +4,7 @@ import os
 import re
 import sys
 
-from waflib import Context, Logs, Options, Scripting, Utils
+from waflib import Build, Context, Logs, Options, Scripting, Utils
 from waflib.extras import autowaf as autowaf
 
 # Mandatory waf variables
@@ -83,6 +83,12 @@ def configure(conf):
     conf.load('autowaf', cache=True)
     autowaf.set_c_lang(conf, 'c99')
 
+    if Options.options.strict:
+        # Check for programs used by lint target
+        conf.find_program("flake8", var="FLAKE8", mandatory=False)
+        conf.find_program("clang-tidy", var="CLANG_TIDY", mandatory=False)
+        conf.find_program("iwyu_tool", var="IWYU_TOOL", mandatory=False)
+
     if Options.options.ultra_strict:
         autowaf.add_compiler_flags(conf.env, 'c', {
             'gcc': [
@@ -534,22 +540,53 @@ def build(bld):
         bld.recurse('plugins')
 
 
+class LintContext(Build.BuildContext):
+    fun = cmd = 'lint'
+
+
 def lint(ctx):
     "checks code for style issues"
     import subprocess
+    import glob
+
+    st = 0
+
+    if "FLAKE8" in ctx.env:
+        Logs.info("Running flake8")
+        st = subprocess.call([ctx.env.FLAKE8[0],
+                              "wscript",
+                              "--ignore",
+                              "E101,E129,W191,E221,W504,E251,E241,E741"])
+    else:
+        Logs.warn("Not running flake8")
+
+    if "IWYU_TOOL" in ctx.env:
+        Logs.info("Running include-what-you-use")
+        cmd = [ctx.env.IWYU_TOOL[0], "-o", "clang", "-p", "build"]
+        output = subprocess.check_output(cmd).decode('utf-8')
+        if 'error: ' in output:
+            sys.stdout.write(output)
+            st += 1
+    else:
+        Logs.warn("Not running include-what-you-use")
+
+    if "CLANG_TIDY" in ctx.env and "clang" in ctx.env.CC[0]:
+        Logs.info("Running clang-tidy")
+        sources = glob.glob('**/*.h', recursive=True)
+        sources = list(map(os.path.abspath, sources))
+        procs = []
+        for source in sources:
+            cmd = [ctx.env.CLANG_TIDY[0], "--quiet", "-p=.", source]
+            procs += [subprocess.Popen(cmd, cwd="build")]
+
+        for proc in procs:
+            stdout, stderr = proc.communicate()
+            st += proc.returncode
+    else:
+        Logs.warn("Not running clang-tidy")
 
-    subprocess.call("flake8 --ignore E101,E129,W191,E221,W504,E251,E241,E741 "
-                    "wscript lv2specgen/lv2docgen.py lv2specgen/lv2specgen.py "
-                    "plugins/literasc.py",
-                    shell=True)
-
-    cmd = ("clang-tidy -p=. -header-filter=.* -checks=\"*," +
-           "-hicpp-signed-bitwise," +
-           "-llvm-header-guard," +
-           "-misc-unused-parameters," +
-           "-readability-else-after-return\" " +
-           "build-test.c")
-    subprocess.call(cmd, cwd='build', shell=True)
+    if st != 0:
+        sys.exit(st)
 
 
 def test_vocabularies(check, specs, files):