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, 3 insertions, 4 deletions

diff --git a/crates/shirabe/src/command/bump_command.rs b/crates/shirabe/src/command/bump_command.rs
index 87109d20..db4888c7 100644
--- a/crates/shirabe/src/command/bump_command.rs
+++ b/crates/shirabe/src/command/bump_command.rs
@@ -16,10 +16,9 @@ use crate::package::version::VersionBumper;
 use crate::repository::PlatformRepository;
 use crate::util::Filesystem;
 use crate::util::Silencer;
-use shirabe_pcre::Preg;
 use shirabe_php_shim::{
     PhpMixed, file_get_contents, file_put_contents, impl_php_class, is_writable, php_regex,
-    strtolower,
+    preg_match2, preg_replace, strtolower,
 };
 use shirabe_symfony_console::command::Command;
 use shirabe_symfony_console::input::InputInterface;
@@ -177,7 +176,7 @@ impl BumpCommand {
         let packages_filter = if !packages_filter.is_empty() {
             let packages_filter: Vec<String> = packages_filter
                 .iter()
-                .map(|constraint| Preg::replace(php_regex!(r"{[:= ].+}"), "", constraint))
+                .map(|constraint| preg_replace(php_regex!(r"{[:= ].+}"), "", constraint))
                 .collect();
             let unique_lower: Vec<String> = packages_filter
                 .iter()
@@ -187,7 +186,7 @@ impl BumpCommand {
                 .collect();
             let pattern = base_package::package_names_to_regexp(&unique_lower, "{^(?:%s)$}iD");
             for (key, reqs) in tasks.iter_mut() {
-                reqs.retain(|pkg_name, _| Preg::is_match(&pattern, pkg_name));
+                reqs.retain(|pkg_name, _| preg_match2(&pattern, pkg_name, 0).is_some());
             }
             packages_filter
         } else {