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environment_value

git_policy_cli::invocation::child_environment

Function environment_value 

Source 
pub fn environment_value(
    environment: &[(OsString, OsString)],
    name: &str,
) -> Option<OsString>
Expand description

What: Look one variable up the way C’s getenv does: the first entry wins. &[(OsString, OsString)] borrows a list of name/value pairs. Option<OsString> is “an owned value or nothing”. Why: The overlay must read exactly what the Git child will read. Returning an owned copy keeps the function free of borrow bookkeeping for the caller.

In TS you’d write (pseudocode):

function environmentValue(environment: [string, string][], name: string): string | undefined;