rust-hgignore: add a scripting command to print the hgignore regexp Add a command `script::hgignore --print-re` to print the hgignore regexp. One complication is that the `rootfilesin`-only matcher doesn't use a regular expression, and the existing converts it to something that's not a regular expression. We add code to handle that case. Since this command is now sufficient to generate a tidy-looking regexp for scripting, this frees up the "debug" command to report the internal regexp used by the regex engine, so we make that change too.

--- a/rust/rhg/src/main.rs	Fri Dec 06 20:27:59 2024 +0000
+++ b/rust/rhg/src/main.rs	Fri Dec 13 15:05:37 2024 +0000
@@ -534,6 +534,7 @@
     pub mod debugrhgsparse;
     pub mod files;
     pub mod root;
+    pub mod script_hgignore;
     pub mod status;
 }
 
@@ -616,6 +617,7 @@
         subcommand!(root),
         subcommand!(config),
         subcommand!(status),
+        subcommand!(script_hgignore),
     ];
     let mut commands = Subcommands::new();
     for cmd in subcommands {