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du: be dryer when extracting the --max-depth arg.

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There's no need to repeat the two checks for `from_str` when we can just
do it preemptively.
This commit is contained in:
Huon Wilson 2014-03-19 17:56:40 +11:00
parent dc24cc1776
commit 4d9c71e541
1 changed files with 19 additions and 27 deletions
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46
du/du.rs
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@ -176,38 +176,30 @@ ers of 1000).");
return
}
let options = Options{
let summarize = matches.opt_present("summarize");
let max_depth_str = matches.opt_str("max-depth");
let max_depth = max_depth_str.as_ref().and_then(|s| from_str::<uint>(*s));
match (max_depth_str, max_depth) {
(Some(ref s), _) if summarize => {
println!("{}: warning: summarizing conflicts with --max-depth={:s}", program, *s);
return
}
(Some(ref s), None) => {
println!("{}: invalid maximum depth '{:s}'", program, *s);
return
}
(Some(_), Some(_)) | (None, _) => { /* valid */ }
}
let options = Options {
all: matches.opt_present("all"),
max_depth: match (matches.opt_present("summarize"), matches.opt_str("max-depth")) {
(true, Some(s)) => match from_str::<uint>(s) {
Some(_) => {
println!("du: warning: summarizing conflicts with --max-depth={:s}", s);
return
},
None => {
println!("du: invalid maximum depth '{:s}'", s);
return
}
},
(true, None) => Some(0),
(false, Some(s)) => match from_str::<uint>(s) {
Some(u) => Some(u),
None => {
println!("du: invalid maximum depth '{:s}'", s);
return
}
},
(false, None) => None
},
max_depth: max_depth,
total: matches.opt_present("total"),
separate_dirs: matches.opt_present("S"),
};
let strs = matches.free.clone();
let strs = match strs.is_empty() {
true => ~[~"./"],
false => strs
};
let strs = if matches.free.is_empty() {~[~"./"]} else {matches.free.clone()};
let options_arc = Arc::new(options);