perf(regex): eliminate per-call clone overhead in preg_* dispatch

regex::Regex::clone() does not share the underlying meta engine's
search-cache pool, so every fresh clone pays a ~10us warmup cost on
its first use. Two changes together eliminate this across nearly all
preg_* call sites:

- A php_regex! macro resolves PHP-style patterns to a per-call-site
  &'static regex::Regex (via regex-macro's LazyLock), applied at the
  majority of call sites throughout the codebase.
- Call sites still passing dynamic pattern strings go through
  PATTERN_CACHE, which now stores Arc<(Regex, bool)> and hands out
  Arc::clone()s instead of cloning the Regex itself.

PregPattern::resolve() returns a ResolvedPattern enum (Arc or
'static reference) rather than an owned Regex, so neither path ever
clones the Regex proper.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/crates/shirabe/src/package/package.rs b/crates/shirabe/src/package/package.rs
index ce22b755..e0bee0e6 100644
--- a/crates/shirabe/src/package/package.rs
+++ b/crates/shirabe/src/package/package.rs
@@ -11,7 +11,9 @@ use crate::util::ComposerMirror;
 use chrono::{DateTime, Utc};
 use indexmap::{IndexMap, IndexSet};
 use shirabe_external_packages::composer::pcre::Preg;
-use shirabe_php_shim::{E_USER_DEPRECATED, LogicException, PhpMixed, strpos, trigger_error};
+use shirabe_php_shim::{
+    E_USER_DEPRECATED, LogicException, PhpMixed, php_regex, strpos, trigger_error,
+};
 
 /// Mirror entry, e.g. `['url' => 'https://...', 'preferred' => true]`.
 #[derive(Debug, Clone)]
@@ -138,7 +140,7 @@ impl Package {
         let target_dir = self.target_dir.as_ref()?;
 
         let replaced = Preg::replace(
-            "{ (?:^|[\\\\/]+) \\.\\.? (?:[\\\\/]+|$) (?:\\.\\.? (?:[\\\\/]+|$) )*}x",
+            php_regex!("{ (?:^|[\\\\/]+) \\.\\.? (?:[\\\\/]+|$) (?:\\.\\.? (?:[\\\\/]+|$) )*}x"),
             "/",
             target_dir,
         );
@@ -415,13 +417,15 @@ impl Package {
         // TODO generalize this a bit for self-managed/on-prem versions? Some kind of replace token in dist urls which allow this?
         if self.get_dist_url().is_some()
             && Preg::is_match(
-                "{^https?://(?:(?:www\\.)?bitbucket\\.org|(api\\.)?github\\.com|(?:www\\.)?gitlab\\.com)/}i",
+                php_regex!(
+                    "{^https?://(?:(?:www\\.)?bitbucket\\.org|(api\\.)?github\\.com|(?:www\\.)?gitlab\\.com)/}i"
+                ),
                 &self.get_dist_url().unwrap_or_default(),
             )
         {
             self.set_dist_reference(Some(reference.clone()));
             self.set_dist_url(Some(Preg::replace(
-                "{(?<=/|sha=)[a-f0-9]{40}(?=/|$)}i",
+                php_regex!("{(?<=/|sha=)[a-f0-9]{40}(?=/|$)}i"),
                 &reference,
                 &self.get_dist_url().unwrap_or_default(),
             )));