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, 7 insertions, 5 deletions

diff --git a/crates/shirabe/src/platform/version.rs b/crates/shirabe/src/platform/version.rs
index 00ff3097..baa029ef 100644
--- a/crates/shirabe/src/platform/version.rs
+++ b/crates/shirabe/src/platform/version.rs
@@ -1,7 +1,6 @@
 //! ref: composer/src/Composer/Platform/Version.php
 
-use shirabe_pcre::Preg;
-use shirabe_php_shim::{CmpOp, php_regex, version_compare};
+use shirabe_php_shim::{CmpOp, php_regex, preg_match2, version_compare};
 
 pub struct Version;
 
@@ -9,11 +8,12 @@ impl Version {
     pub fn parse_openssl(openssl_version: &str, is_fips: &mut bool) -> Option<String> {
         *is_fips = false;
 
-        let matches = Preg::match3(
+        let matches = preg_match2(
             php_regex!(
                 r"/^(?P<version>[0-9.]+)(?P<patch>[a-z]{0,2})(?P<suffix>(?:-?(?:dev|pre|alpha|beta|rc|fips)[\d]*)*)(?:-\w+)?(?: \(.+?\))?$/"
             ),
             openssl_version,
+            0,
         )?;
 
         let version = matches.name("version").unwrap_or_default().to_string();
@@ -42,9 +42,10 @@ impl Version {
     }
 
     pub fn parse_libjpeg(libjpeg_version: &str) -> Option<String> {
-        let matches = Preg::match3(
+        let matches = preg_match2(
             php_regex!(r"/^(?P<major>\d+)(?P<minor>[a-z]*)$/"),
             libjpeg_version,
+            0,
         )?;
 
         let major = matches.name("major").unwrap_or_default().to_string();
@@ -57,9 +58,10 @@ impl Version {
     }
 
     pub fn parse_zoneinfo_version(zoneinfo_version: &str) -> Option<String> {
-        let matches = Preg::match3(
+        let matches = preg_match2(
             php_regex!(r"/^(?P<year>\d{4})(?P<revision>[a-z]*)$/"),
             zoneinfo_version,
+            0,
         )?;
 
         let year = matches.name("year").unwrap_or_default().to_string();