Add note about binaries list.

MAINTAINING.md

@@ -37,6 +37,11 @@ You might need to swiftly pause the [Website Deploy] workflow to prevent publish
 > Make sure `scarb-metadata` crate is [released and published](#scarb-metadata-release-procedure) to [crates.io].
 > Only [StarkNet Crates.io Admins] can do this.
 
+> [!IMPORTANT]
+> If you add or remove a binary target compiled with the release (i.e. create or remove a crate in `extensions` directory),
+> make sure to work with the Homebrew team to upgrade their
+> [Scarb installation formula](https://github.com/Homebrew/homebrew-core/blob/master/Formula/s/scarb.rb#L26).
+
 ### Write release notes
 
 Upon completion, the [Release] workflow should draft a release on GitHub.

xtask/src/list_binaries.rs

@@ -13,6 +13,15 @@ pub fn main(_: Args) -> Result<()> {
     Ok(())
 }
 
+/// List all the binaries that should be compiled with Scarb release.
+///
+/// This includes both the Scarb itself, and all the extensions defined in creates
+/// in the `extensions` directory.
+///
+/// Note that some external dependencies might still define this list statically in their build scripts.
+/// One example would be the Homebrew installation formula for scarb.
+/// See: `<https://github.com/Homebrew/homebrew-core/blob/master/Formula/s/scarb.rb#L26>`
+/// Such dependencies need to be updated manually each time the list of binaries changes.
 pub fn list_binaries() -> Result<Vec<String>> {
     let mut bins = vec!["scarb".to_string()];
     for entry in fs::read_dir("extensions")? {