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/command/completion_trait.rs b/crates/shirabe/src/command/completion_trait.rs
index 491c5d07..ce0aef58 100644
--- a/crates/shirabe/src/command/completion_trait.rs
+++ b/crates/shirabe/src/command/completion_trait.rs
@@ -11,8 +11,7 @@ use crate::repository::RepositoryInterfaceHandle;
 use crate::repository::RootPackageRepository;
 use crate::repository::repository_interface::{SEARCH_NAME, SEARCH_VENDOR, SearchResult};
 use indexmap::IndexMap;
-use shirabe_pcre::Preg;
-use shirabe_php_shim::{PhpMixed, php_regex, preg_quote};
+use shirabe_php_shim::{PhpMixed, php_regex, preg_match2, preg_quote};
 
 /// Adds completion to arguments and options.
 ///
@@ -257,10 +256,13 @@ pub trait CompletionTrait: BaseCommand {
     /// platform packages from the ones available on the currently-running PHP
     fn suggest_available_package_incl_platform(&self) -> SuggestedValues {
         SuggestedValues::Closure(Box::new(|this, input, suggestions| {
-            let matches = if Preg::is_match(
+            let matches = if preg_match2(
                 php_regex!(r"{^(ext|lib|php)(-|$)|^com}"),
                 &input.get_completion_value(),
-            ) {
+                0,
+            )
+            .is_some()
+            {
                 this.suggest_platform_package()
                     .call(this, input, suggestions)?
             } else {
@@ -295,7 +297,7 @@ pub trait CompletionTrait: BaseCommand {
             let mut names: Vec<String> = vec![];
             for package in repos.get_packages()? {
                 let name = package.get_name();
-                if Preg::is_match(pattern.clone(), &name) {
+                if preg_match2(pattern.clone(), &name, 0).is_some() {
                     names.push(name);
                 }
             }