If the current working directory of `clang-include-cleaner` differs from
the directory of the input files specified in the compilation database,
it doesn't adjust the input file paths properly. As a result,
`clang-include-cleaner` either writes files to the wrong directory or
fails to write files altogether.
This pull request fixes the issue by adjusting the input file paths
based on the directory specified in the compilation database. If that
directory is not writable, `clang-include-cleaner` will write the output
relative to the current working directory.
Fixes#110843.
Our internal integration relies on injecting some default values to
ignore/keep lists.
That means we can have filters, despite of not having occurences
for the flag.
This adds command-line flags to the tool:
+ -print: prints changed source code
+ -print=changes: prints headers added/removed
+ -edit: rewrites code in place
+ -insert=0/-remove=0: disables additions/deletions for the above
These are supported by a couple of new functions dumped into Analysis:
analyze() sits on top of walkUsed and makes used/unused decisions for
Includes. fixIncludes() applies those results to source code.
Differential Revision: https://reviews.llvm.org/D139013
