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@masatake masatake commented Jun 8, 2025

main: using regex for choosing a parser for the given file name

This change extends --map- option to support regular
expression matching with the full file name.

The original --map- option supports glob based matching
and extension comparison with the file basename.
However, two methods are not enough if the file names are too
generic. See #3287 .

The regular expression passed to --map- must be surround
by % character like

--map-RpmMacros='%(.*/)?macros.d/macros.([^/]+)$%'

If you want to match in a case-insensitive way, append `i' after the second % like

--map-RpmMacros='%(.*/)?macros.d/macros.([^/]+)$%i'

If you want to use % as part of an expression, put \ before % for escaping.

TODO:

  • reconsider name regex, rxpr, or something
  • update ctags.1
  • add Tmain test cases
  • add description to --help
  • extend optlib2c
  • add --list-map-regex
  • add --list-maps
  • add pcre backend

@masatake masatake marked this pull request as draft June 8, 2025 23:34
@masatake masatake changed the title main: using regex for choosing a paser for given file name [WIP] main: using regex for choosing a paser for given file name Jun 8, 2025
@masatake masatake force-pushed the main--rexpr branch 2 times, most recently from a5a3a28 to c50f467 Compare September 27, 2025 18:32
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codecov bot commented Sep 27, 2025

Codecov Report

❌ Patch coverage is 54.68750% with 87 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.77%. Comparing base (241dfc3) to head (c50f467).
⚠️ Report is 2 commits behind head on master.

Files with missing lines Patch % Lines
main/parse.c 50.47% 52 Missing ⚠️
main/options.c 46.80% 25 Missing ⚠️
main/rexprcode.c 78.94% 8 Missing ⚠️
optlib/rpmMacros.c 0.00% 2 Missing ⚠️
Additional details and impacted files
@@            Coverage Diff             @@
##           master    #4270      +/-   ##
==========================================
- Coverage   85.87%   85.77%   -0.10%     
==========================================
  Files         248      249       +1     
  Lines       63593    63754     +161     
==========================================
+ Hits        54608    54688      +80     
- Misses       8985     9066      +81     

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The original code used a boolean value to toggle how filenames were
mapped to the parser by glob-like pattern or by extension.

To support the third way mapping a file name to a parser, by regular
expression pattern, we will use an enum value instead of Boolean.

Signed-off-by: Masatake YAMATO <[email protected]>
This change extends --map-<LANG> option to support regular
expression matching with the full file name.

The original --map-<LANG> option supports the glob based matching
and the extension comparison with the file basename.
However, two methods are not enough if the file names are too
generic. See universal-ctags#3287 .

The regular expression passed to --map-<LANG> must be surround
by % character like

   --map-RpmMacros='%(.*/)?macros\.d/macros\.([^/]+)$%'

If you want to match in a case-insensitive way, append `i' after
the second % like

   --map-RpmMacros='%(.*/)?macros\.d/macros\.([^/]+)$%i'

If you want to use % as part of an expression, put \ before %
for escaping.

TODO:

- [ ] reconsider name regex, rxpr, or something
- [ ] update ctags.1
- [ ] add Tmain test cases
- [ ] add description to --help
- [X] extend optlib2c
- [X] add --list-map-regex
- [X] add --list-maps
- [ ] add pcre backend

Signed-off-by: Masatake YAMATO <[email protected]>
@masatake masatake changed the title [WIP] main: using regex for choosing a paser for given file name [WIP] main: using regex for choosing a parser for given file name Oct 17, 2025
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