perf(regex): eliminate per-call clone overhead in preg_* dispatch

regex::Regex::clone() does not share the underlying meta engine's
search-cache pool, so every fresh clone pays a ~10us warmup cost on
its first use. Two changes together eliminate this across nearly all
preg_* call sites:

- A php_regex! macro resolves PHP-style patterns to a per-call-site
  &'static regex::Regex (via regex-macro's LazyLock), applied at the
  majority of call sites throughout the codebase.
- Call sites still passing dynamic pattern strings go through
  PATTERN_CACHE, which now stores Arc<(Regex, bool)> and hands out
  Arc::clone()s instead of cloning the Regex itself.

PregPattern::resolve() returns a ResolvedPattern enum (Arc or
'static reference) rather than an owned Regex, so neither path ever
clones the Regex proper.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

14 files changed, 95 insertions, 57 deletions

diff --git a/crates/shirabe/src/command/archive_command.rs b/crates/shirabe/src/command/archive_command.rs
index 2a099c89..cd2d1648 100644
--- a/crates/shirabe/src/command/archive_command.rs
+++ b/crates/shirabe/src/command/archive_command.rs
@@ -27,7 +27,7 @@ use shirabe_external_packages::composer::pcre::{CaptureKey, Preg};
 use shirabe_external_packages::symfony::console::command::command::Command;
 use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
-use shirabe_php_shim::{LogicException, get_debug_type};
+use shirabe_php_shim::{LogicException, get_debug_type, php_regex};
 
 #[derive(Debug)]
 pub struct ArchiveCommand {
@@ -379,7 +379,7 @@ impl ArchiveCommand {
         if let Some(version_str) = &version {
             let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
             if Preg::match3(
-                r"{@(stable|RC|beta|alpha|dev)$}i",
+                php_regex!(r"{@(stable|RC|beta|alpha|dev)$}i"),
                 version_str,
                 Some(&mut matches),
             ) {
diff --git a/crates/shirabe/src/command/bump_command.rs b/crates/shirabe/src/command/bump_command.rs
index e6c565c1..8f27fcb8 100644
--- a/crates/shirabe/src/command/bump_command.rs
+++ b/crates/shirabe/src/command/bump_command.rs
@@ -19,7 +19,9 @@ use shirabe_external_packages::composer::pcre::Preg;
 use shirabe_external_packages::symfony::console::command::command::Command;
 use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
-use shirabe_php_shim::{PhpMixed, file_get_contents, file_put_contents, is_writable, strtolower};
+use shirabe_php_shim::{
+    PhpMixed, file_get_contents, file_put_contents, is_writable, php_regex, strtolower,
+};
 
 #[derive(Debug)]
 pub struct BumpCommand {
@@ -171,7 +173,7 @@ impl BumpCommand {
         let packages_filter = if !packages_filter.is_empty() {
             let packages_filter: Vec<String> = packages_filter
                 .iter()
-                .map(|constraint| Preg::replace(r"{[:= ].+}", "", constraint))
+                .map(|constraint| Preg::replace(php_regex!(r"{[:= ].+}"), "", constraint))
                 .collect();
             let unique_lower: Vec<String> = packages_filter
                 .iter()
diff --git a/crates/shirabe/src/command/config_command.rs b/crates/shirabe/src/command/config_command.rs
index 6c2e7777..6d40c307 100644
--- a/crates/shirabe/src/command/config_command.rs
+++ b/crates/shirabe/src/command/config_command.rs
@@ -24,7 +24,7 @@ use shirabe_external_packages::symfony::console::output::OutputInterface;
 use shirabe_php_shim::{
     InvalidArgumentException, PhpMixed, RuntimeException, array_is_list, array_merge,
     escapeshellcmd, exec, explode, file_exists, file_get_contents, implode, in_array, is_array,
-    is_bool, is_dir, is_numeric, is_object, is_string, json_encode, str_replace, strpos,
+    is_bool, is_dir, is_numeric, is_object, is_string, json_encode, php_regex, str_replace, strpos,
     strtolower, system, touch, var_export,
 };
 use shirabe_semver::VersionParser;
@@ -350,7 +350,7 @@ impl Command for ConfigCommand {
             let mut value: PhpMixed;
             let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
             if Preg::is_match3(
-                "/^repos?(?:itories)?(?:\\.(.+))?/",
+                php_regex!("/^repos?(?:itories)?(?:\\.(.+))?/"),
                 &setting_key,
                 Some(&mut matches),
             ) {
@@ -589,7 +589,7 @@ impl Command for ConfigCommand {
         // handle preferred-install per-package config
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
         if Preg::is_match3(
-            "/^preferred-install\\.(.+)/",
+            php_regex!("/^preferred-install\\.(.+)/"),
             &setting_key,
             Some(&mut matches),
         ) {
@@ -630,7 +630,7 @@ impl Command for ConfigCommand {
         // handle allow-plugins config setting elements true or false to add/remove
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
         if Preg::is_match3(
-            "{^allow-plugins\\.([a-zA-Z0-9/*-]+)}",
+            php_regex!("{^allow-plugins\\.([a-zA-Z0-9/*-]+)}"),
             &setting_key,
             Some(&mut matches),
         ) {
@@ -703,7 +703,7 @@ impl Command for ConfigCommand {
         // handle repositories
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
         if Preg::is_match3(
-            "/^repos?(?:itories)?\\.(.+)/",
+            php_regex!("/^repos?(?:itories)?\\.(.+)/"),
             &setting_key,
             Some(&mut matches),
         ) {
@@ -778,7 +778,11 @@ impl Command for ConfigCommand {
 
         // handle extra
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
-        if Preg::is_match3("/^extra\\.(.+)/", &setting_key, Some(&mut matches)) {
+        if Preg::is_match3(
+            php_regex!("/^extra\\.(.+)/"),
+            &setting_key,
+            Some(&mut matches),
+        ) {
             if input.borrow().get_option("unset")?.as_bool() == Some(true) {
                 self.config_source
                     .borrow_mut()
@@ -851,7 +855,11 @@ impl Command for ConfigCommand {
 
         // handle suggest
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
-        if Preg::is_match3("/^suggest\\.(.+)/", &setting_key, Some(&mut matches)) {
+        if Preg::is_match3(
+            php_regex!("/^suggest\\.(.+)/"),
+            &setting_key,
+            Some(&mut matches),
+        ) {
             if input.borrow().get_option("unset")?.as_bool() == Some(true) {
                 self.config_source
                     .borrow_mut()
@@ -889,7 +897,11 @@ impl Command for ConfigCommand {
 
         // handle platform
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
-        if Preg::is_match3("/^platform\\.(.+)/", &setting_key, Some(&mut matches)) {
+        if Preg::is_match3(
+            php_regex!("/^platform\\.(.+)/"),
+            &setting_key,
+            Some(&mut matches),
+        ) {
             if input.borrow().get_option("unset")?.as_bool() == Some(true) {
                 self.config_source
                     .borrow_mut()
@@ -1013,7 +1025,9 @@ impl Command for ConfigCommand {
         // handle auth
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
         if Preg::is_match3(
-            "/^(bitbucket-oauth|github-oauth|gitlab-oauth|gitlab-token|http-basic|custom-headers|bearer|forgejo-token)\\.(.+)/",
+            php_regex!(
+                "/^(bitbucket-oauth|github-oauth|gitlab-oauth|gitlab-token|http-basic|custom-headers|bearer|forgejo-token)\\.(.+)/"
+            ),
             &setting_key,
             Some(&mut matches),
         ) {
@@ -1153,7 +1167,11 @@ impl Command for ConfigCommand {
 
                     // Check if the header is in correct "Name: Value" format
                     let mut header_parts: IndexMap<CaptureKey, String> = IndexMap::new();
-                    if !Preg::is_match3("/^[^:]+:\\s*.+$/", header, Some(&mut header_parts)) {
+                    if !Preg::is_match3(
+                        php_regex!("/^[^:]+:\\s*.+$/"),
+                        header,
+                        Some(&mut header_parts),
+                    ) {
                         return Err(RuntimeException {
                             message: format!(
                                 "Header \"{}\" is not in \"Header-Name: Header-Value\" format",
@@ -1208,7 +1226,11 @@ impl Command for ConfigCommand {
 
         // handle script
         let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
-        if Preg::is_match3("/^scripts\\.(.+)/", &setting_key, Some(&mut matches)) {
+        if Preg::is_match3(
+            php_regex!("/^scripts\\.(.+)/"),
+            &setting_key,
+            Some(&mut matches),
+        ) {
             if input.borrow().get_option("unset")?.as_bool() == Some(true) {
                 self.config_source
                     .borrow_mut()
@@ -1407,7 +1429,11 @@ impl ConfigCommand {
                     || (key == "repositories" && k.is_none()))
             {
                 let mut new_k = k.clone().unwrap_or_default();
-                new_k.push_str(&Preg::replace("{^config\\.}", "", &format!("{}.", key)));
+                new_k.push_str(&Preg::replace(
+                    php_regex!("{^config\\.}"),
+                    "",
+                    &format!("{}.", key),
+                ));
                 k = Some(new_k);
                 self.list_configuration(
                     value_inner,
@@ -1466,13 +1492,13 @@ impl ConfigCommand {
                     } else {
                         k.clone().unwrap()
                     };
-                    let id = Preg::replace("{\\..*$}", "", &id_source);
+                    let id = Preg::replace(php_regex!("{\\..*$}"), "", &id_source);
                     let id = Preg::replace(
-                        "{[^a-z0-9]}i",
+                        php_regex!("{[^a-z0-9]}i"),
                         "-",
                         &strtolower(&shirabe_php_shim::trim(&id, Some(" \t\n\r\0\u{0B}"))),
                     );
-                    let id = Preg::replace("{-+}", "-", &id);
+                    let id = Preg::replace(php_regex!("{-+}"), "-", &id);
                     format!("https://getcomposer.org/doc/06-config.md#{}", id)
                 };
             if is_string(&raw_val)
@@ -1707,7 +1733,7 @@ fn build_unique_config_values() -> IndexMap<String, (ValidatorFn, NormalizerFn)>
         (
             Box::new(|val| {
                 PhpMixed::Bool(Preg::is_match3(
-                    "/^\\s*([0-9.]+)\\s*(?:([kmg])(?:i?b)?)?\\s*$/i",
+                    php_regex!("/^\\s*([0-9.]+)\\s*(?:([kmg])(?:i?b)?)?\\s*$/i"),
                     val.as_string().unwrap_or(""),
                     None,
                 ))
diff --git a/crates/shirabe/src/command/create_project_command.rs b/crates/shirabe/src/command/create_project_command.rs
index 4544cb63..9a2c4755 100644
--- a/crates/shirabe/src/command/create_project_command.rs
+++ b/crates/shirabe/src/command/create_project_command.rs
@@ -735,7 +735,7 @@ impl CreateProjectCommand {
                 let ok = {
                     let mut matched: IndexMap<CaptureKey, String> = IndexMap::new();
                     let ok = Preg::is_match3(
-                        &format!(
+                        format!(
                             "{{^[^,\\s]*?@({})$}}i",
                             implode(
                                 "|",
diff --git a/crates/shirabe/src/command/diagnose_command.rs b/crates/shirabe/src/command/diagnose_command.rs
index e457fbb2..d726efd4 100644
--- a/crates/shirabe/src/command/diagnose_command.rs
+++ b/crates/shirabe/src/command/diagnose_command.rs
@@ -44,8 +44,8 @@ use shirabe_php_shim::{
     PHP_BINARY, PHP_EOL, PHP_VERSION, PHP_VERSION_ID, PHP_WINDOWS_VERSION_BUILD, PhpMixed, defined,
     disk_free_space, extension_loaded, file_exists, filter_var_boolean, function_exists,
     get_class_err, hash, implode, ini_get, ioncube_loader_iversion, ioncube_loader_version,
-    is_array, is_string, ob_get_clean, ob_start, phpinfo, rtrim, str_contains, str_replace,
-    str_starts_with, strpos, strstr, strtolower, trim, version_compare,
+    is_array, is_string, ob_get_clean, ob_start, php_regex, phpinfo, rtrim, str_contains,
+    str_replace, str_starts_with, strpos, strstr, strtolower, trim, version_compare,
 };
 
 #[derive(Debug)]
@@ -1176,7 +1176,9 @@ impl DiagnoseCommand {
         let mut phpinfo_match: IndexMap<CaptureKey, String> = IndexMap::new();
         if phpinfo_str.is_some()
             && Preg::is_match3(
-                "{Configure Command(?: *</td><td class=\"v\">| *=> *)(.*?)(?:</td>|$)}m",
+                php_regex!(
+                    "{Configure Command(?: *</td><td class=\"v\">| *=> *)(.*?)(?:</td>|$)}m"
+                ),
                 phpinfo_str.as_ref().unwrap(),
                 Some(&mut phpinfo_match),
             )
diff --git a/crates/shirabe/src/command/fund_command.rs b/crates/shirabe/src/command/fund_command.rs
index 65ae2c94..c40a3760 100644
--- a/crates/shirabe/src/command/fund_command.rs
+++ b/crates/shirabe/src/command/fund_command.rs
@@ -14,7 +14,7 @@ use shirabe_external_packages::symfony::console::command::command::Command;
 use shirabe_external_packages::symfony::console::formatter::OutputFormatter;
 use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
-use shirabe_php_shim::PhpMixed;
+use shirabe_php_shim::{PhpMixed, php_regex};
 use shirabe_semver::constraint::AnyConstraint;
 use shirabe_semver::constraint::MatchAllConstraint;
 
@@ -60,8 +60,10 @@ impl FundCommand {
                 .and_then(|v| v.as_string())
                 .unwrap_or("");
             if r#type == "github"
-                && let Some(matches) =
-                    Preg::is_match_with_indexed_captures(r"{^https://github.com/([^/]+)$}", &url)
+                && let Some(matches) = Preg::is_match_with_indexed_captures(
+                    php_regex!(r"{^https://github.com/([^/]+)$}"),
+                    &url,
+                )
                 && let Some(sponsor) = matches.into_iter().nth(1)
             {
                 url = format!("https://github.com/sponsors/{}", sponsor);
diff --git a/crates/shirabe/src/command/global_command.rs b/crates/shirabe/src/command/global_command.rs
index a1f5f72e..dd1ec9c2 100644
--- a/crates/shirabe/src/command/global_command.rs
+++ b/crates/shirabe/src/command/global_command.rs
@@ -15,7 +15,7 @@ use shirabe_external_packages::symfony::console::input::ArrayInput;
 use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::input::StringInput;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
-use shirabe_php_shim::{LogicException, RuntimeException, chdir};
+use shirabe_php_shim::{LogicException, RuntimeException, chdir, php_regex};
 use std::path::Path;
 
 #[derive(Debug)]
@@ -100,7 +100,7 @@ impl GlobalCommand {
         }
 
         let new_input_str = Preg::replace4(
-            r"{\bg(?:l(?:o(?:b(?:a(?:l)?)?)?)?)?\b}",
+            php_regex!(r"{\bg(?:l(?:o(?:b(?:a(?:l)?)?)?)?)?\b}"),
             "",
             &Self::input_to_string(&*input.borrow())?,
             1,
@@ -153,7 +153,10 @@ impl Command for GlobalCommand {
         input: std::rc::Rc<std::cell::RefCell<dyn InputInterface>>,
         output: std::rc::Rc<std::cell::RefCell<dyn OutputInterface>>,
     ) -> anyhow::Result<i64> {
-        let tokens = Preg::split(r"{\s+}", &Self::input_to_string(&*input.borrow())?);
+        let tokens = Preg::split(
+            php_regex!(r"{\s+}"),
+            &Self::input_to_string(&*input.borrow())?,
+        );
         let mut args: Vec<String> = vec![];
         for token in &tokens {
             if !token.is_empty() && !token.starts_with('-') {
diff --git a/crates/shirabe/src/command/init_command.rs b/crates/shirabe/src/command/init_command.rs
index f0f07a56..6b3503b0 100644
--- a/crates/shirabe/src/command/init_command.rs
+++ b/crates/shirabe/src/command/init_command.rs
@@ -28,7 +28,7 @@ use shirabe_php_shim::{
     FILE_IGNORE_NEW_LINES, InvalidArgumentException, PHP_EOL, PHP_SERVER, PhpMixed,
     array_flip_strings, array_intersect_key, array_map, basename, empty, explode, file,
     file_exists, file_get_contents, file_put_contents, get_current_user, implode, is_dir,
-    is_string, preg_quote, realpath, str_replace, strpos, strtolower, trim, ucwords,
+    is_string, php_regex, preg_quote, realpath, str_replace, strpos, strtolower, trim, ucwords,
 };
 use shirabe_spdx_licenses::SpdxLicenses;
 
@@ -143,7 +143,7 @@ impl Command for InitCommand {
 
         if options.contains_key("name")
             && !Preg::is_match(
-                r"{^[a-z0-9]([_.-]?[a-z0-9]+)*\/[a-z0-9](([_.]|-{1,2})?[a-z0-9]+)*$}D",
+                php_regex!(r"{^[a-z0-9]([_.-]?[a-z0-9]+)*\/[a-z0-9](([_.]|-{1,2})?[a-z0-9]+)*$}D"),
                 options
                     .get("name")
                     .and_then(|v| v.as_string())
@@ -556,7 +556,7 @@ impl Command for InitCommand {
                     }
 
                     if !Preg::is_match(
-                        r"{^[a-z0-9]([_.-]?[a-z0-9]+)*\/[a-z0-9](([_.]|-{1,2})?[a-z0-9]+)*$}D",
+                        php_regex!(r"{^[a-z0-9]([_.-]?[a-z0-9]+)*\/[a-z0-9](([_.]|-{1,2})?[a-z0-9]+)*$}D"),
                         value.as_string().unwrap_or(""),
                     ) {
                         return Err(InvalidArgumentException {
@@ -877,7 +877,7 @@ impl Command for InitCommand {
                     value_str
                 };
 
-                if !Preg::is_match(r"{^[^/][A-Za-z0-9\-_/]+/$}", &value_or_default)
+                if !Preg::is_match(php_regex!(r"{^[^/][A-Za-z0-9\-_/]+/$}"), &value_or_default)
                 {
                     return Err(InvalidArgumentException {
                         message: format!(
@@ -921,7 +921,7 @@ impl InitCommand {
     ) -> anyhow::Result<IndexMap<String, Option<String>>> {
         let mut m: IndexMap<CaptureKey, String> = IndexMap::new();
         if Preg::is_match3(
-            r#"/^(?P<name>[- .,\p{L}\p{N}\p{Mn}\'’\"()]+)(?:\s+<(?P<email>.+?)>)?$/u"#,
+            php_regex!(r#"/^(?P<name>[- .,\p{L}\p{N}\p{Mn}\'’\"()]+)(?:\s+<(?P<email>.+?)>)?$/u"#),
             author,
             Some(&mut m),
         ) {
@@ -988,7 +988,7 @@ impl InitCommand {
 
         let namespace: Vec<String> = array_map(
             |part: &String| {
-                let part = Preg::replace(r"/[^a-z0-9]/i", " ", part);
+                let part = Preg::replace(php_regex!(r"/[^a-z0-9]/i"), " ", part);
                 let part = ucwords(&part);
                 str_replace(" ", "", &part)
             },
@@ -1015,7 +1015,7 @@ impl InitCommand {
         {
             *self.git_config.borrow_mut() = Some(IndexMap::new());
             let mut m: IndexMap<CaptureKey, Vec<String>> = IndexMap::new();
-            if Preg::is_match_all3(r"{^([^=]+)=(.*)$}m", &output, Some(&mut m)) {
+            if Preg::is_match_all3(php_regex!(r"{^([^=]+)=(.*)$}m"), &output, Some(&mut m)) {
                 let keys: Vec<String> = m.get(&CaptureKey::ByIndex(1)).cloned().unwrap_or_default();
                 let values: Vec<String> =
                     m.get(&CaptureKey::ByIndex(2)).cloned().unwrap_or_default();
@@ -1174,14 +1174,14 @@ impl InitCommand {
 
     fn sanitize_package_name_component(&self, name: &str) -> String {
         let name = Preg::replace(
-            r"{(?:([a-z])([A-Z])|([A-Z])([A-Z][a-z]))}",
+            php_regex!(r"{(?:([a-z])([A-Z])|([A-Z])([A-Z][a-z]))}"),
             "$1$3-$2$4",
             name,
         );
         let name = strtolower(&name);
-        let name = Preg::replace(r"{^[_.-]+|[_.-]+$|[^a-z0-9_.-]}u", "", &name);
+        let name = Preg::replace(php_regex!(r"{^[_.-]+|[_.-]+$|[^a-z0-9_.-]}u"), "", &name);
 
-        Preg::replace(r"{([_.-]){2,}}u", "$1", &name)
+        Preg::replace(php_regex!(r"{([_.-]){2,}}u"), "$1", &name)
     }
 
     fn get_default_package_name(&self) -> String {
diff --git a/crates/shirabe/src/command/package_discovery_trait.rs b/crates/shirabe/src/command/package_discovery_trait.rs
index e5427514..f8f7cede 100644
--- a/crates/shirabe/src/command/package_discovery_trait.rs
+++ b/crates/shirabe/src/command/package_discovery_trait.rs
@@ -24,7 +24,7 @@ use shirabe_external_packages::symfony::console::output::OutputInterface;
 use shirabe_php_shim::{
     Exception, InvalidArgumentException, LogicException, PHP_EOL, PhpMixed, array_keys,
     array_slice, asort, explode, file_get_contents, implode, in_array, is_array, is_file,
-    is_numeric, json_decode, levenshtein, strlen, strpos, trim,
+    is_numeric, json_decode, levenshtein, php_regex, strlen, strpos, trim,
 };
 
 /// @internal
@@ -145,7 +145,7 @@ pub trait PackageDiscoveryTrait: BaseCommand {
             for mut requirement in requires_norm {
                 if requirement.contains_key("version")
                     && Preg::is_match(
-                        r"{^\d+(\.\d+)?$}",
+                        php_regex!(r"{^\d+(\.\d+)?$}"),
                         requirement.get("version").map(|s| s.as_str()).unwrap_or(""),
                     )
                 {
@@ -337,7 +337,7 @@ pub trait PackageDiscoveryTrait: BaseCommand {
 
                             let mut m: IndexMap<CaptureKey, String> = IndexMap::new();
                             if Preg::is_match3(
-                                r"{^\s*(?P<name>[\S/]+)(?:\s+(?P<version>\S+))?\s*$}",
+                                php_regex!(r"{^\s*(?P<name>[\S/]+)(?:\s+(?P<version>\S+))?\s*$}"),
                                 &selection,
                                 Some(&mut m),
                             ) {
diff --git a/crates/shirabe/src/command/remove_command.rs b/crates/shirabe/src/command/remove_command.rs
index e7686efd..776fca79 100644
--- a/crates/shirabe/src/command/remove_command.rs
+++ b/crates/shirabe/src/command/remove_command.rs
@@ -396,7 +396,7 @@ impl Command for RemoveCommand {
                     .unwrap_or_default();
                 let type_keys_refs: Vec<&str> = type_keys.iter().map(|s| s.as_str()).collect();
                 let matches_in_type = Preg::grep(
-                    &base_package::package_name_to_regexp(package),
+                    base_package::package_name_to_regexp(package),
                     &type_keys_refs,
                 );
 
@@ -409,7 +409,7 @@ impl Command for RemoveCommand {
                 let alt_type_keys_refs: Vec<&str> =
                     alt_type_keys.iter().map(|s| s.as_str()).collect();
                 let matches_in_alt_type = Preg::grep(
-                    &base_package::package_name_to_regexp(package),
+                    base_package::package_name_to_regexp(package),
                     &alt_type_keys_refs,
                 );
 
diff --git a/crates/shirabe/src/command/repository_command.rs b/crates/shirabe/src/command/repository_command.rs
index 06ecfb4f..c42b70c4 100644
--- a/crates/shirabe/src/command/repository_command.rs
+++ b/crates/shirabe/src/command/repository_command.rs
@@ -15,7 +15,8 @@ use shirabe_external_packages::symfony::console::command::command::Command;
 use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
 use shirabe_php_shim::{
-    InvalidArgumentException, PHP_URL_HOST, PhpMixed, RuntimeException, parse_url, strtolower,
+    InvalidArgumentException, PHP_URL_HOST, PhpMixed, RuntimeException, parse_url, php_regex,
+    strtolower,
 };
 
 #[derive(Debug)]
@@ -287,7 +288,7 @@ impl Command for RepositoryCommand {
                     }));
                 }
                 let arg1_str = arg1.as_deref().unwrap();
-                let repo_config: PhpMixed = if Preg::is_match(r"{^\s*\{}", arg1_str) {
+                let repo_config: PhpMixed = if Preg::is_match(php_regex!(r"{^\s*\{}"), arg1_str) {
                     JsonFile::parse_json(Some(arg1_str), None)?
                 } else {
                     if arg2.is_none() {
diff --git a/crates/shirabe/src/command/script_alias_command.rs b/crates/shirabe/src/command/script_alias_command.rs
index 17629162..5cc4af58 100644
--- a/crates/shirabe/src/command/script_alias_command.rs
+++ b/crates/shirabe/src/command/script_alias_command.rs
@@ -10,7 +10,7 @@ use shirabe_external_packages::composer::pcre::Preg;
 use shirabe_external_packages::symfony::console::command::command::Command;
 use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
-use shirabe_php_shim::{InvalidArgumentException, LogicException, PhpMixed, is_string};
+use shirabe_php_shim::{InvalidArgumentException, LogicException, PhpMixed, is_string, php_regex};
 
 #[derive(Debug)]
 pub struct ScriptAliasCommand {
@@ -138,7 +138,7 @@ impl Command for ScriptAliasCommand {
         // TODO(phase-c): InputInterface lacks to_string; use a placeholder until it is modeled.
         let input_as_string = String::new();
         let _ = input;
-        let script_alias_input = Preg::replace4(r"{^\S+ ?}", "", &input_as_string, 1);
+        let script_alias_input = Preg::replace4(php_regex!(r"{^\S+ ?}"), "", &input_as_string, 1);
         let mut flags = indexmap::IndexMap::new();
         flags.insert(
             "script-alias-input".to_string(),
diff --git a/crates/shirabe/src/command/show_command.rs b/crates/shirabe/src/command/show_command.rs
index a63e08cf..8d1f67ff 100644
--- a/crates/shirabe/src/command/show_command.rs
+++ b/crates/shirabe/src/command/show_command.rs
@@ -41,8 +41,8 @@ use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
 use shirabe_php_shim::{
     DATE_ATOM, InvalidArgumentException, LogicException, PhpMixed, UnexpectedValueException,
-    array_search, date, date_format_to_strftime, extension_loaded, in_array, realpath, strtolower,
-    version_compare,
+    array_search, date, date_format_to_strftime, extension_loaded, in_array, php_regex, realpath,
+    strtolower, version_compare,
 };
 use shirabe_semver::Semver;
 use shirabe_semver::constraint::AnyConstraint;
@@ -2775,7 +2775,7 @@ impl ShowCommand {
             let mut groups: IndexMap<CaptureKey, String> = IndexMap::new();
             if major_only
                 && Preg::is_match3(
-                    r"{^(?P<zero_major>(?:0\.)+)?(?P<first_meaningful>\d+)\.}",
+                    php_regex!(r"{^(?P<zero_major>(?:0\.)+)?(?P<first_meaningful>\d+)\.}"),
                     &package.get_version(),
                     Some(&mut groups),
                 )
@@ -2802,7 +2802,8 @@ impl ShowCommand {
             }
 
             if patch_only {
-                let trimmed_version = Preg::replace(r"{(\.0)+$}D", "", &package.get_version());
+                let trimmed_version =
+                    Preg::replace(php_regex!(r"{(\.0)+$}D"), "", &package.get_version());
                 let parts_needed = if trimmed_version.starts_with('0') {
                     4
                 } else {
diff --git a/crates/shirabe/src/command/update_command.rs b/crates/shirabe/src/command/update_command.rs
index 0163f6bc..0d212350 100644
--- a/crates/shirabe/src/command/update_command.rs
+++ b/crates/shirabe/src/command/update_command.rs
@@ -31,7 +31,7 @@ use shirabe_external_packages::symfony::console::input::InputInterface;
 use shirabe_external_packages::symfony::console::output::OutputInterface;
 use shirabe_php_shim::{
     InvalidArgumentException, PhpMixed, RuntimeException, array_filter, array_intersect,
-    array_keys, array_merge_map, array_search_in_vec, in_array, strtolower,
+    array_keys, array_merge_map, array_search_in_vec, in_array, php_regex, strtolower,
 };
 use shirabe_semver::Intervals;
 use shirabe_semver::constraint::MultiConstraint;
@@ -184,7 +184,7 @@ impl Command for UpdateCommand {
         if !packages.is_empty() {
             let allowlist_packages_with_requirements: Vec<String> =
                 array_filter(&packages, |pkg: &String| -> bool {
-                    Preg::is_match(r"{\S+[ =:]\S+}", pkg)
+                    Preg::is_match(php_regex!(r"{\S+[ =:]\S+}"), pkg)
                 });
             for (package, constraint) in
                 self.format_requirements(allowlist_packages_with_requirements.clone())?
@@ -194,7 +194,8 @@ impl Command for UpdateCommand {
 
             // replace the foo/bar:req by foo/bar in the allowlist
             for package in &allowlist_packages_with_requirements {
-                let package_name = Preg::replace(r"{^([^ =:]+)[ =:].*$}", "$1", package);
+                let package_name =
+                    Preg::replace(php_regex!(r"{^([^ =:]+)[ =:].*$}"), "$1", package);
                 if let Some(idx) = array_search_in_vec(package, &packages) {
                     packages[idx] = package_name;
                 }
@@ -266,7 +267,7 @@ impl Command for UpdateCommand {
                     continue;
                 }
                 let matches = Preg::is_match_with_indexed_captures(
-                    r"{^(\d+\.\d+\.\d+)}",
+                    php_regex!(r"{^(\d+\.\d+\.\d+)}"),
                     &package.get_version(),
                 );
                 let Some(matches) = matches else {