Function env_or_else

editor/build.rs:36–41

Get an environment variable, or if it is not set or empty, use the provided fallback function. Returns a string with trimmed whitespace.

(key: &str, fallback: impl FnOnce() -> String)

/// Get an environment variable, or if it is not set or empty, use the provided fallback function. Returns a string with trimmed whitespace.
fn env_or_else(key: &str, fallback: impl FnOnce() -> String) -> String {
	match env::var(key) {
		Ok(v) if !v.trim().is_empty() => v.trim().to_string(),
		_ => fallback().trim().to_string(),
	}
}

/// Execute a Git command to obtain its output. Return "unknown" if it fails for any of the possible reasons.
fn git_or_unknown(args: &[&str]) -> String {