fix(require-command): avoid unsupported regex lookahead in dev-branch check

The `regex` crate does not support negative lookahead, so the ported
`^dev-(?!main$|master$|trunk$|latest$)` pattern panicked at runtime on
any `require` invocation that reached version-selection. Replace it
with equivalent hand-written string logic per docs/dev/regex-porting.md.

2 files changed, 13 insertions, 12 deletions

diff --git a/crates/shirabe/src/command/require_command.rs b/crates/shirabe/src/command/require_command.rs
index 219ad3d8..16bc73f0 100644
--- a/crates/shirabe/src/command/require_command.rs
+++ b/crates/shirabe/src/command/require_command.rs
@@ -30,7 +30,6 @@ use crate::util::Filesystem;
 use crate::util::PackageSorter;
 use crate::util::Silencer;
 use indexmap::IndexMap;
-use shirabe_external_packages::composer::pcre::Preg;
 use shirabe_external_packages::seld::signal::SignalHandler;
 use shirabe_external_packages::symfony::console::command::command::Command;
 use shirabe_external_packages::symfony::console::input::InputInterface;
@@ -1110,13 +1109,19 @@ impl RequireCommand {
                 io_interface::NORMAL,
             );
 
-            if Preg::is_match(
-                r"{^dev-(?!main$|master$|trunk$|latest$)}",
-                requirements
-                    .get(package_name)
-                    .map(|s| s.as_str())
-                    .unwrap_or(""),
-            ) {
+            // Regex pattern compatibility:
+            // PCRE `{^dev-(?!main$|master$|trunk$|latest$)}` uses a negative lookahead,
+            // which the `regex` crate does not support. Decomposed into hand-written logic.
+            let requirement_str = requirements
+                .get(package_name)
+                .map(|s| s.as_str())
+                .unwrap_or("");
+            if requirement_str.starts_with("dev-")
+                && !matches!(
+                    &requirement_str[4..],
+                    "main" | "master" | "trunk" | "latest"
+                )
+            {
                 self.get_io().warning(
                     &format!(
                         "Version {} looks like it may be a feature branch which is unlikely to keep working in the long run and may be in an unstable state",
diff --git a/crates/shirabe/tests/command/require_command_test.rs b/crates/shirabe/tests/command/require_command_test.rs
index e6186505..b132eb43 100644
--- a/crates/shirabe/tests/command/require_command_test.rs
+++ b/crates/shirabe/tests/command/require_command_test.rs
@@ -340,10 +340,6 @@ fn provide_inconsistent_require_keys() -> Vec<(bool, bool, &'static str)> {
 
 #[test]
 #[serial]
-#[ignore = "the solver-pool root-package issue is fixed; now panics in shirabe_php_shim::preg \
-            (\"look-around, including look-ahead and look-behind, is not supported\") because \
-            the dev-branch pattern `^dev-(?!main$|master$|trunk$|latest$)` uses a lookahead the \
-            `regex` crate cannot express (see docs/dev/regex-porting.md)"]
 fn test_inconsistent_require_keys() {
     for (is_dev, is_interactive, expected_warning) in provide_inconsistent_require_keys() {
         let current_key = if is_dev { "require" } else { "require-dev" };