refactor(pcre): drop Result from Preg method return types

The Preg methods panic on PCRE failure (per the file header rationale),
so their anyhow::Result wrappers never carried an Err.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

3 files changed, 2 insertions, 7 deletions

diff --git a/crates/shirabe/src/installer/binary_installer.rs b/crates/shirabe/src/installer/binary_installer.rs
index 778a8a0..bc7d694 100644
--- a/crates/shirabe/src/installer/binary_installer.rs
+++ b/crates/shirabe/src/installer/binary_installer.rs
@@ -177,9 +177,7 @@ impl BinaryInstaller {
             r"{^#!/(?:usr/bin/env )?(?:[^/]+/)*(.+)$}m",
             &line,
             Some(&mut m),
-        )
-        .unwrap_or(false)
-        {
+        ) {
             return trim(
                 m.get(&CaptureKey::ByIndex(1))
                     .map(|s| s.as_str())
@@ -299,8 +297,6 @@ impl BinaryInstaller {
         // which allows calling the proxy with a custom php process
         if let Some(m) =
             Preg::is_match_with_indexed_captures(r"{^(#!.*\r?\n)?[\r\n\t ]*<\?php}", &bin_contents)
-                .ok()
-                .flatten()
         {
             // carry over the existing shebang if present, otherwise add our own
             let proxy_code = if m.get(1).is_none() {
diff --git a/crates/shirabe/src/installer/library_installer.rs b/crates/shirabe/src/installer/library_installer.rs
index da5533c..9fb3e43 100644
--- a/crates/shirabe/src/installer/library_installer.rs
+++ b/crates/shirabe/src/installer/library_installer.rs
@@ -119,7 +119,7 @@ impl LibraryInstaller {
                     "",
                     &install_path,
                 );
-                return replaced.unwrap_or(install_path);
+                return replaced;
             }
         }
 
diff --git a/crates/shirabe/src/installer/suggested_packages_reporter.rs b/crates/shirabe/src/installer/suggested_packages_reporter.rs
index 875fdc6..2a2ed9f 100644
--- a/crates/shirabe/src/installer/suggested_packages_reporter.rs
+++ b/crates/shirabe/src/installer/suggested_packages_reporter.rs
@@ -206,6 +206,5 @@ impl SuggestedPackagesReporter {
 
     fn remove_control_characters(&self, string: &str) -> String {
         Preg::replace("/[[:cntrl:]]/", "", &string.replace('\n', " "))
-            .unwrap_or_else(|_| string.replace('\n', " "))
     }
 }