Added --verify option to verilog-formatter.

[kbrunham-intel]

Adds a --verify option to verilog-formatter.

This change is inspired by similar options on many other formatting tools to allow a check of any formatting required and then return a non-zero error code if the file would be formatted. This allows the tool with the --verify option to be easily integrated into CICD style-check flows that ensure all source files are formatted correctly.

This change includes 2 tests for this new option.

[codecov-commenter]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (e76f7fc) 92.95% compared to head (7bed532) 92.95%.

Files	Patch %	Lines
verilog/tools/formatter/verilog_format.cc	82.60%	4 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2062   +/-   ##
=======================================
  Coverage   92.95%   92.95%           
=======================================
  Files         357      357           
  Lines       26412    26424   +12     
=======================================
+ Hits        24550    24562   +12     
  Misses       1862     1862           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[hzeller]

Thanks, I think this is a good idea! Just a few comments.

[hzeller]

To fix the formatting complaints of the VerifyFormatting CI action, run .github/bin/run-clang-format.sh

[fangism]

Yes, this beats writing to a temporary file and then comparing.

[kbrunham-intel]

@hzeller : Have I met all your expectations based on the code review? If so, please also approve.

I don't have write access to this repo, so I will also need you to merge it.

[hzeller]

Thanks, merged!