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/downloader/zip_downloader.rs b/crates/shirabe/src/downloader/zip_downloader.rs
index b4802066..7b0ad050 100644
--- a/crates/shirabe/src/downloader/zip_downloader.rs
+++ b/crates/shirabe/src/downloader/zip_downloader.rs
@@ -8,13 +8,12 @@ use crate::package::PackageInterfaceHandle;
 use crate::util::IniHelper;
 use crate::util::Platform;
 use indexmap::IndexMap;
-use shirabe_pcre::Preg;
 use shirabe_php_shim::Catch as _;
 use shirabe_php_shim::{
     CmpOp, ErrorException, PhpMixed, RuntimeException, UnexpectedValueException, ZipArchive,
     bin2hex, class_exists, file_exists, file_get_contents, filesize, function_exists, hash_file,
-    impl_php_class, is_file, json_encode, php_regex, random_int, str_replace, strlen, substr,
-    version_compare,
+    impl_php_class, is_file, json_encode, php_regex, preg_match2, random_int, str_replace, strlen,
+    substr, version_compare,
 };
 use shirabe_symfony_process::ExecutableFinder;
 use std::sync::Mutex;
@@ -113,8 +112,11 @@ impl ZipDownloader {
                 .execute(&[command_spec[1].as_str()], &mut output, None::<&str>)
                 .unwrap_or(1)
                 == 0
-                && let Some(m) =
-                    Preg::is_match3(php_regex!(r"{^\s*7-Zip(?:\s\[64\])?\s([0-9.]+)}"), &output)
+                && let Some(m) = preg_match2(
+                    php_regex!(r"{^\s*7-Zip(?:\s\[64\])?\s([0-9.]+)}"),
+                    &output,
+                    0,
+                )
             {
                 let m1 = m.get(1).unwrap_or_default().to_string();
                 if version_compare(&m1, "21.01", CmpOp::Lt) {