[cfe-dev] [Proposal] New tool contributions to clang repository (gcc/g++ compilation database converter, plist to HTML converter)

[George Karpenkov via cfe-dev]

Hi Gyorgy,

> On Sep 25, 2018, at 11:41 AM, György Orbán via cfe-dev <cfe-dev at lists.llvm.org> wrote:
> 2. Plist to HTML report conversion tool

I’d really love to have that in Clang, and I think that is an amazing tool!
However, I’ve tried to launch it and failed — it seemed to look for files which are not there.
I would be happy to review patches for that — but I think the tool would require quite a lot of work.

> 
> 1. gcc/g++ compilation database to Clang compilation database conversion tool
> 
> One problem is what we want to address is that gcc/g++ compilation commands cannot be forwarded without modification
> to the Clang based tools as they were logged or exported by the build system.
>  
> Post-processing of the compilation command is required:
> - might contain compilation flags and build targets which are not compatible with Clang (needs to be filtered out)
> - the compilation argument filtering needs to be done in every tool which uses the compilation database json (scan-build, scan-build-py, CodeChecker)
> - when gcc is used as a cross compiler, hard-coded include paths, flags and compilation target of gcc/g++ are missing from the command line argument list. These needs to be auto-detected and passed to Clang before analysis.
> - C/C++ standard versions might be missing from the compilation commands which could change the analysis results (c++11 checker triggers for c++98 code)
>  
> Our idea is to create a separate tool which could transform a gcc/g++ compilation database file into a compile command json file which can be used by Clang based tools without further modification.
> The non-compatible flags are filtered out and the necessary cross compilation include paths and compilation flags are added.
> Other Clang based tools could also benefit from the converted compilation database json, like clangd.
>  
> 2. Plist to HTML report conversion tool (see the source code at https://github.com/Ericsson/codechecker/tree/master/vendor/plist_to_html <https://github.com/Ericsson/codechecker/tree/master/vendor/plist_to_html>)
> 
> Currently Clang Static Analyzer can produce HTML output but this should not be done necessarily by the analyzer.
> Plist reports can contain much more information and are easier to manage and parse by other tools compared to the html reports.
> With our HTML generator tool we can generate static HTML reports which look similar to the report visualization in Xcode or
> to the report viewer web UI of CodeChecker. You can move on each event through a bug path and arrows are shown for easier understanding.
>  
> Let us know what do you think about these tools, how well would they fit near the available tools.
> Your feedback is appreciated.
>  
> Thanks,
> Gyorgy Orban
> CodeChecker Team
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