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, 7 deletions

diff --git a/crates/shirabe/src/command/diagnose_command.rs b/crates/shirabe/src/command/diagnose_command.rs
index 820b026c..f7f84575 100644
--- a/crates/shirabe/src/command/diagnose_command.rs
+++ b/crates/shirabe/src/command/diagnose_command.rs
@@ -33,13 +33,12 @@ use crate::util::ProcessExecutor;
 use crate::util::http::ProxyManager;
 use crate::util::http::RequestProxy;
 use indexmap::IndexMap;
-use shirabe_pcre::Preg;
-use shirabe_php_shim::Catch as _;
+use shirabe_php_shim::PhpClass as _;
 use shirabe_php_shim::{
-    AnyThrowable, CmpOp, InvalidArgumentException, PHP_EOL, PhpClass as _, PhpMixed,
-    RuntimeException, disk_free_space, file_exists, filter_var_boolean, hash, impl_php_class,
-    implode, is_array, is_string, php_regex, rtrim, str_replace, strpos, strstr, strstr3,
-    strtolower, trim, version_compare,
+    AnyThrowable, Catch as _, CmpOp, InvalidArgumentException, PHP_EOL, PhpMixed, RuntimeException,
+    disk_free_space, file_exists, filter_var_boolean, hash, impl_php_class, implode, is_array,
+    is_string, php_regex, preg_match2, rtrim, str_replace, strpos, strstr, strstr3, strtolower,
+    trim, version_compare,
 };
 use shirabe_symfony_console::command::Command;
 use shirabe_symfony_console::input::InputInterface;
@@ -862,9 +861,10 @@ impl DiagnoseCommand {
             warnings.insert("zlib".to_string(), PhpMixed::Bool(true));
         }
 
-        if let Some(phpinfo_match) = Preg::is_match3(
+        if let Some(phpinfo_match) = preg_match2(
             php_regex!("{Configure Command(?: *</td><td class=\"v\">| *=> *)(.*?)(?:</td>|$)}m"),
             &diagnostics.phpinfo_general,
+            0,
         ) {
             let configure = phpinfo_match.get(1).unwrap_or_default().to_string();
             let configure = configure.as_str();