refactor(pcre): inline Preg into its call sites and drop the crate

Preg had shed everything it owned: after the last few rounds its methods
were one-line forwards to the shim's preg_*(), differing only in a
default argument or a wrapper the caller unwrapped anyway. The 460 call
sites now name the shim function, and shirabe-pcre is gone from the
workspace along with its LICENSE entry.

The forwards expand as they read: isMatch becomes
preg_match2(.., 0).is_some() (is_none() where PHP negates it), isMatch3
and match3 drop the .is_some(), matchAll counts through
preg_match_all2(..).occurrence_count(), and replace4/replace5 spell out
the limit and count arguments preg_replace2 takes. Callbacks are the one
place the shapes differ: preg_replace_callback carries an error out of
the callback, so the fourteen infallible closures wrap their result in
Ok() and expect() it back.

Config::process() is the fifteenth, and it drops the `error` cell it
captured to smuggle a failure past a closure that could only return a
String. The `?` in the closure now carries it, which is what the PHP
does -- a throw from the callback leaves preg_replace_callback at the
failing match rather than running the remaining replacements and
reporting the last error.

The module doc that explained why composer/pcre's exceptions and
*StrictGroups() variants have no counterpart moves to the shim's preg
module, where the functions it describes live.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/crates/shirabe/src/package/version/version_parser.rs b/crates/shirabe/src/package/version/version_parser.rs
index c16583e0..ad1a05cf 100644
--- a/crates/shirabe/src/package/version/version_parser.rs
+++ b/crates/shirabe/src/package/version/version_parser.rs
@@ -2,8 +2,7 @@
 
 use crate::repository::PlatformRepository;
 use indexmap::IndexMap;
-use shirabe_pcre::Preg;
-use shirabe_php_shim::php_regex;
+use shirabe_php_shim::{php_regex, preg_match2, preg_replace};
 use shirabe_semver::Semver;
 use shirabe_semver::VersionParser as SemverVersionParser;
 use shirabe_semver::constraint::AnyConstraint;
@@ -50,7 +49,7 @@ impl VersionParser {
         let count = pairs.len();
         let mut i = 0_usize;
         while i < count {
-            let mut pair = Preg::replace(
+            let mut pair = preg_replace(
                 php_regex!(r"{^([^=: ]+)[=: ](.*)$}"),
                 "$1 $2",
                 pairs[i].trim(),
@@ -58,10 +57,12 @@ impl VersionParser {
             if !pair.contains(' ')
                 && i + 1 < count
                 && !pairs[i + 1].contains('/')
-                && !Preg::is_match(
+                && preg_match2(
                     php_regex!(r"{(?<=[a-z0-9_/-])\*|\*(?=[a-z0-9_/-])}i"),
                     &pairs[i + 1],
+                    0,
                 )
+                .is_none()
                 && !PlatformRepository::is_platform_package(&pairs[i + 1])
             {
                 pair += &format!(" {}", pairs[i + 1]);