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Don't allocate args in order to run find.

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This commit is contained in:
Mark Simulacrum 2017-06-21 11:15:49 -06:00
parent 7a75d2bec4
commit 01e83a362c
1 changed files with 9 additions and 10 deletions
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19
src/bootstrap/flags.rs
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@ -122,16 +122,15 @@ To learn more about a subcommand, run `./x.py <subcommand> -h`");
// the subcommand. Therefore we must manually identify the subcommand first, so that we can
// complete the definition of the options. Then we can use the getopt::Matches object from
// there on out.
let mut possible_subcommands = args.iter().collect::<Vec<_>>();
possible_subcommands.retain(|&s|
(s == "build")
|| (s == "test")
|| (s == "bench")
|| (s == "doc")
|| (s == "clean")
|| (s == "dist")
|| (s == "install"));
let subcommand = match possible_subcommands.first() {
let subcommand = args.iter().find(|&s|
(s == "build")
|| (s == "test")
|| (s == "bench")
|| (s == "doc")
|| (s == "clean")
|| (s == "dist")
|| (s == "install"));
let subcommand = match subcommand {
Some(s) => s,
None => {
// No subcommand -- show the general usage and subcommand help