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Some small improvements to du readability.

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Mostly, making more use of `map` and `map_err` in `Result`. One benefit
is that at least one location had duplicated logic for how to map the
error, which is no longer the case after this commit.
This commit is contained in:
Jason Gedge 2020-03-29 13:11:59 -04:00 committed by Jason Gedge
parent 35dc7438a5
commit 2ddab3e8ce
1 changed files with 18 additions and 42 deletions
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60
crates/nu-cli/src/commands/du.rs
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@ -89,36 +89,21 @@ impl PerItemCommand for Du {
fn du(args: DuArgs, ctx: &RunnablePerItemContext) -> Result<OutputStream, ShellError> {
let tag = ctx.name.clone();
let exclude = args
.exclude
.clone()
.map_or(Ok(None), move |x| match Pattern::new(&x.item) {
Ok(p) => Ok(Some(p)),
Err(e) => Err(ShellError::labeled_error(
e.msg,
"Glob error",
x.tag.clone(),
)),
})?;
let path = args.path.clone();
let filter_files = path.is_none();
let paths = match path {
Some(p) => match glob::glob_with(
p.item.to_str().expect("Why isn't this encoded properly?"),
GLOB_PARAMS,
) {
Ok(g) => Ok(g),
Err(e) => Err(ShellError::labeled_error(
e.msg,
"Glob error",
p.tag.clone(),
)),
},
None => match glob::glob_with("*", GLOB_PARAMS) {
Ok(g) => Ok(g),
Err(e) => Err(ShellError::labeled_error(e.msg, "Glob error", tag.clone())),
},
}?
let exclude = args.exclude.map_or(Ok(None), move |x| {
Pattern::new(&x.item)
.map(Option::Some)
.map_err(|e| ShellError::labeled_error(e.msg, "glob error", x.tag.clone()))
})?;
let filter_files = args.path.is_none();
let paths = match args.path {
Some(p) => {
let p = p.item.to_str().expect("Why isn't this encoded properly?");
glob::glob_with(p, GLOB_PARAMS)
}
None => glob::glob_with("*", GLOB_PARAMS),
}
.map_err(|e| ShellError::labeled_error(e.msg, "glob error", tag.clone()))?
.filter(move |p| {
if filter_files {
match p {
@ -130,10 +115,7 @@ fn du(args: DuArgs, ctx: &RunnablePerItemContext) -> Result<OutputStream, ShellE
true
}
})
.map(move |p| match p {
Err(e) => Err(glob_err_into(e)),
Ok(s) => Ok(s),
});
.map(|v| v.map_err(glob_err_into));
let ctrl_c = ctx.ctrl_c.clone();
let all = args.all;
@ -324,10 +306,7 @@ impl From<DirInfo> for Value {
if !d.files.is_empty() {
let v = Value {
value: UntaggedValue::Table(
d.files
.into_iter()
.map(move |f| f.into())
.collect::<Vec<Value>>(),
d.files.into_iter().map(Into::into).collect::<Vec<Value>>(),
),
tag: d.tag.clone(),
};
@ -336,10 +315,7 @@ impl From<DirInfo> for Value {
if !d.dirs.is_empty() {
let v = Value {
value: UntaggedValue::Table(
d.dirs
.into_iter()
.map(move |d| d.into())
.collect::<Vec<Value>>(),
d.dirs.into_iter().map(Into::into).collect::<Vec<Value>>(),
),
tag: d.tag.clone(),
};