ripgrep: add --auto-hybrid-regex flag

This flag, when set, will automatically dispatch to PCRE2 if the given
regex cannot be compiled by Rust's regex engine. If both engines fail to
compile the regex, then both errors are surfaced.

Closes #1155

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/feature.rs b/tests/feature.rs
index 6ee2bf87..be9f4bec 100644
--- a/tests/feature.rs
+++ b/tests/feature.rs
@@ -681,6 +681,21 @@ rgtest!(f1138_no_ignore_dot, |dir: Dir, mut cmd: TestCommand| {
     eqnice!("bar\n", cmd.arg("--ignore-file").arg(".fzf-ignore").stdout());
 });
 
+// See: https://github.com/BurntSushi/ripgrep/issues/1155
+rgtest!(f1155_auto_hybrid_regex, |dir: Dir, mut cmd: TestCommand| {
+    // No sense in testing a hybrid regex engine with only one engine!
+    if !dir.is_pcre2() {
+        return;
+    }
+
+    dir.create("sherlock", SHERLOCK);
+    cmd.arg("--no-pcre2").arg("--auto-hybrid-regex").arg(r"(?<=the )Sherlock");
+
+    let expected = "\
+sherlock:For the Doctor Watsons of this world, as opposed to the Sherlock
+";
+    eqnice!(expected, cmd.stdout());
+});
 
 // See: https://github.com/BurntSushi/ripgrep/issues/1207
 //