+/// Finds the remote for rust-lang/rust.
+/// For example for these remotes it will return `upstream`.
+/// ```text
+/// origin https://github.com/Nilstrieb/rust.git (fetch)
+/// origin https://github.com/Nilstrieb/rust.git (push)
+/// upstream https://github.com/rust-lang/rust (fetch)
+/// upstream https://github.com/rust-lang/rust (push)
+/// ```
+fn get_rust_lang_rust_remote() -> Result<String, String> {
+ let mut git = Command::new("git");
+ git.args(["config", "--local", "--get-regex", "remote\\..*\\.url"]);
+
+ let output = git.output().map_err(|err| format!("{err:?}"))?;
+ if !output.status.success() {
+ return Err("failed to execute git config command".to_owned());
+ }
+
+ let stdout = String::from_utf8(output.stdout).map_err(|err| format!("{err:?}"))?;
+
+ let rust_lang_remote = stdout
+ .lines()
+ .find(|remote| remote.contains("rust-lang"))
+ .ok_or_else(|| "rust-lang/rust remote not found".to_owned())?;
+
+ let remote_name =
+ rust_lang_remote.split('.').nth(1).ok_or_else(|| "remote name not found".to_owned())?;
+ Ok(remote_name.into())
+}
+