Add support for clazy (static analyzer for Qt)

[iamsergio]

What would it take to support another static analyzer ?

clazy is a Qt oriented code checker based on clang framework.

It can be used as a clang plugin, via -Xclang -add-plugin, or it can be used like clang-tidy, over a CompilationCommands.json database.

[gyorb]

Based on the documentation we should be able to load the shared object.
Just put the shared object into the plugin folder in the built CodeChecker package (build/CodeChecker/plugin).
We are loading the plugins from that directory like this:

codechecker/libcodechecker/analyze/analyzers/analyzer_clangsa.py

Lines 150 to 154 in 7ed3264

	for plugin in config.analyzer_plugins:
	analyzer_cmd.extend(["-Xclang", "-plugin",
	"-Xclang", "checkercfg",
	"-Xclang", "-load",
	"-Xclang", plugin])

You should be able to see the extra checkers from the plugin with the CodeChecker checkers command.

By default CodeChecker uses the clang found in the PATH so you should build the plugin to that clang to be able to load it (or modify the clang which is used to run the analysis).

[iamsergio]

Thanks, I'll give it a go and report back

[Xazax-hun]

The "-Xclang", "-plugin", "-Xclang", "checkercfg", part of the code to handle plugins is not generic.
The added plugin is calles clang-lazy in case of clazy and not checkercfg.
Maybe that should be read from a configuration file that is next to the plugins?

[technic]

I am not aware of the clang / clang-tidy architecture but it seems that clazy is emmitting warnings not on the clangsa level.

[ericLemanissier]

It'd be great to have clazy support in codechecker. clazy catches a lot of errors which are not caught by clangsa, clang-tidy or cppcheck.