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authorJesse Luehrs <doy@tozt.net>2018-11-10 05:16:40 -0500
committerJesse Luehrs <doy@tozt.net>2018-11-10 05:16:40 -0500
commitc22141ea46b406003eb889a8408d9b87e6b488fa (patch)
treecbf4a1d6c524676d1df60caa3e47f6afe243d178
parent21ccf50a1705298273160d06eb2298d63403b34b (diff)
downloadlastfm-query-c22141ea46b406003eb889a8408d9b87e6b488fa.tar.gz
lastfm-query-c22141ea46b406003eb889a8408d9b87e6b488fa.zip
better error reporting when no args given
-rw-r--r--src/cmd/mod.rs13
1 files changed, 9 insertions, 4 deletions
diff --git a/src/cmd/mod.rs b/src/cmd/mod.rs
index 813a27a..021bc48 100644
--- a/src/cmd/mod.rs
+++ b/src/cmd/mod.rs
@@ -18,11 +18,11 @@ fn get_command() -> failure::Fallible<Box<Command>> {
sql::subcommand(),
recommend::subcommand(),
];
- let matches = app_from_crate!()
+ let mut app = app_from_crate!()
.subcommands(subcommands.into_iter().map(|s| {
s.setting(clap::AppSettings::DisableVersion)
- }))
- .get_matches();
+ }));
+ let matches = app.clone().get_matches();
let command: Box<Command> = match matches.subcommand() {
("sync", Some(matches)) => Box::new(sync::Command::new(matches)),
@@ -30,7 +30,12 @@ fn get_command() -> failure::Fallible<Box<Command>> {
("recommend", Some(matches)) => Box::new(recommend::Command::new(matches)?),
(name, Some(_)) => bail!("unknown subcommand: {}", name),
- (_, None) => bail!("no subcommand given"),
+ (_, None) => {
+ let mut stderr = std::io::stderr();
+ app.write_long_help(&mut stderr)?;
+ eprintln!("");
+ bail!("no subcommand given")
+ },
};
Ok(command)