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

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>

diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt
index 71f32f35089241bc452cfdccdc6b3e9a30f95366..5033483db496286910dd24507f3374e18ff6c2b5 100644 (file)
--- a/Documentation/git-grep.txt
+++ b/Documentation/git-grep.txt
@@ -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::

diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index a02f7324c01ee5811441d2a6dcb93aafd892298c..a46f70c2b16c2c03f47ccb3444cffb491b68ed83 100644 (file)
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -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.