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>

3 files changed, 8 insertions, 10 deletions

diff --git a/crates/shirabe/src/package/archiver/archivable_files_finder.rs b/crates/shirabe/src/package/archiver/archivable_files_finder.rs
index 8fba18cb..7a1797bf 100644
--- a/crates/shirabe/src/package/archiver/archivable_files_finder.rs
+++ b/crates/shirabe/src/package/archiver/archivable_files_finder.rs
@@ -4,8 +4,7 @@ use crate::package::archiver::BaseExcludeFilter;
 use crate::package::archiver::ComposerExcludeFilter;
 use crate::package::archiver::GitExcludeFilter;
 use crate::util::Filesystem;
-use shirabe_pcre::Preg;
-use shirabe_php_shim::{RuntimeException, preg_quote, realpath};
+use shirabe_php_shim::{RuntimeException, preg_quote, preg_replace, realpath};
 use shirabe_symfony_finder::Finder;
 use std::path::{Path, PathBuf};
 
@@ -56,7 +55,7 @@ impl ArchivableFilesFinder {
                 return false;
             }
 
-            let relative_path = Preg::replace(
+            let relative_path = preg_replace(
                 format!("#^{}#", preg_quote(&sources_clone, Some('#'))),
                 "",
                 &fs.normalize_path(&realpath.to_string_lossy()),
diff --git a/crates/shirabe/src/package/archiver/archive_manager.rs b/crates/shirabe/src/package/archiver/archive_manager.rs
index a0216d88..4f9e2ddc 100644
--- a/crates/shirabe/src/package/archiver/archive_manager.rs
+++ b/crates/shirabe/src/package/archiver/archive_manager.rs
@@ -10,10 +10,9 @@ use crate::util::Filesystem;
 use crate::util::SyncHelper;
 use crate::util::r#loop::Loop;
 use indexmap::IndexMap;
-use shirabe_pcre::Preg;
 use shirabe_php_shim::{
-    InvalidArgumentException, RuntimeException, bin2hex, file_exists, php_regex, random_bytes,
-    realpath, sys_get_temp_dir,
+    InvalidArgumentException, RuntimeException, bin2hex, file_exists, php_regex, preg_match2,
+    preg_replace, random_bytes, realpath, sys_get_temp_dir,
 };
 
 pub struct ArchiveManager {
@@ -58,7 +57,7 @@ impl ArchiveManager {
     ) -> anyhow::Result<IndexMap<String, String>> {
         let base_name = match package.get_archive_name() {
             Some(name) => name,
-            None => Preg::replace(php_regex!("#[^a-z0-9-_]#i"), "-", &package.get_name()),
+            None => preg_replace(php_regex!("#[^a-z0-9-_]#i"), "-", &package.get_name()),
         };
 
         let mut parts: IndexMap<String, String> = IndexMap::new();
@@ -66,7 +65,7 @@ impl ArchiveManager {
 
         let dist_reference = package.get_dist_reference();
         if let Some(ref dist_ref) = dist_reference {
-            if Preg::is_match(php_regex!("{^[a-f0-9]{40}$}"), dist_ref) {
+            if preg_match2(php_regex!("{^[a-f0-9]{40}$}"), dist_ref, 0).is_some() {
                 parts.insert("dist_reference".to_string(), dist_ref.to_string());
                 if let Some(dist_type) = package.get_dist_type() {
                     parts.insert("dist_type".to_string(), dist_type);
diff --git a/crates/shirabe/src/package/archiver/base_exclude_filter.rs b/crates/shirabe/src/package/archiver/base_exclude_filter.rs
index e5487038..16a189a8 100644
--- a/crates/shirabe/src/package/archiver/base_exclude_filter.rs
+++ b/crates/shirabe/src/package/archiver/base_exclude_filter.rs
@@ -1,6 +1,6 @@
 //! ref: composer/src/Composer/Package/Archiver/BaseExcludeFilter.php
 
-use shirabe_pcre::Preg;
+use shirabe_php_shim::preg_match2;
 use shirabe_symfony_finder::Glob;
 
 #[derive(Debug)]
@@ -86,7 +86,7 @@ pub trait BaseExcludeFilter {
                 relative_path
             };
 
-            if Preg::is_match(pattern, path) {
+            if preg_match2(pattern, path, 0).is_some() {
                 exclude = !negate;
             }
         }