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grep & rev-list doc: stop promising libpcre for --perl-regexp

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Stop promising in our grep & rev-list options documentation that we're
always going to be using libpcre when given the --perl-regexp option.

Instead talk about using "Perl-compatible regular expressions" and
using these types of patterns using "a compile-time dependency".

Saying "libpcre" means that we're talking about libpcre.so, which is
always going to be v1. This change is part of an ongoing saga to add
support for libpcre2, which comes with PCRE v2.

In the future we might use some completely unrelated library to
provide perl-compatible regular expression support. By wording the
documentation differently and not promising any specific version of
PCRE or even PCRE at all we have more wiggle room to change the
implementation.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2017-05-20 21:42:05 +00:00 committed by Junio C Hamano
parent 072473e659
commit d048cb13c2
2 changed files with 11 additions and 4 deletions
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7
Documentation/git-grep.txt
View file

@ -161,8 +161,11 @@ OPTIONS
-P::
--perl-regexp::
Use Perl-compatible regexp for patterns. Requires libpcre to be
compiled in.
Use Perl-compatible regular expressions for patterns.
+
Support for these types of regular expressions is an optional
compile-time dependency. If Git wasn't compiled with support for them
providing this option will cause it to die.
-F::
--fixed-strings::

8
Documentation/rev-list-options.txt
View file

@ -92,8 +92,12 @@ endif::git-rev-list[]
pattern as a regular expression).
--perl-regexp::
Consider the limiting patterns to be Perl-compatible regular expressions.
Requires libpcre to be compiled in.
Consider the limiting patterns to be Perl-compatible regular
expressions.
+
Support for these types of regular expressions is an optional
compile-time dependency. If Git wasn't compiled with support for them
providing this option will cause it to die.
--remove-empty::
Stop when a given path disappears from the tree.