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, 6 deletions

diff --git a/crates/shirabe/src/util/composer_mirror.rs b/crates/shirabe/src/util/composer_mirror.rs
index f7bc179f..78f38782 100644
--- a/crates/shirabe/src/util/composer_mirror.rs
+++ b/crates/shirabe/src/util/composer_mirror.rs
@@ -1,7 +1,6 @@
 //! ref: composer/src/Composer/Util/ComposerMirror.php
 
-use shirabe_pcre::Preg;
-use shirabe_php_shim::{hash, php_regex};
+use shirabe_php_shim::{hash, php_regex, preg_match2, preg_replace};
 
 pub struct ComposerMirror;
 
@@ -15,7 +14,7 @@ impl ComposerMirror {
         pretty_version: Option<&str>,
     ) -> String {
         let reference = reference.map(|r| {
-            if Preg::is_match(php_regex!(r"{^([a-f0-9]*|%reference%)$}"), r) {
+            if preg_match2(php_regex!(r"{^([a-f0-9]*|%reference%)$}"), r, 0).is_some() {
                 r.to_string()
             } else {
                 hash("md5", r)
@@ -53,20 +52,22 @@ impl ComposerMirror {
         url: &str,
         r#type: Option<&str>,
     ) -> String {
-        let normalized_url = if let Some(gh_matches) = Preg::match3(
+        let normalized_url = if let Some(gh_matches) = preg_match2(
             php_regex!(
                 r"#^(?:(?:https?|git)://github\.com/|git@github\.com:)([^/]+)/(.+?)(?:\.git)?$#"
             ),
             url,
+            0,
         ) {
             format!(
                 "gh-{}/{}",
                 gh_matches.get(1).unwrap_or_default(),
                 gh_matches.get(2).unwrap_or_default(),
             )
-        } else if let Some(bb_matches) = Preg::match3(
+        } else if let Some(bb_matches) = preg_match2(
             php_regex!(r"#^https://bitbucket\.org/([^/]+)/(.+?)(?:\.git)?/?$#"),
             url,
+            0,
         ) {
             format!(
                 "bb-{}/{}",
@@ -74,7 +75,7 @@ impl ComposerMirror {
                 bb_matches.get(2).unwrap_or_default(),
             )
         } else {
-            Preg::replace(php_regex!(r"{[^a-z0-9_.-]}i"), "-", url.trim_matches('/'))
+            preg_replace(php_regex!(r"{[^a-z0-9_.-]}i"), "-", url.trim_matches('/'))
         };
 
         ["%package%", "%normalizedUrl%", "%type%"]