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Fix and refactor cd for Filesystem Shell. (#1452)

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* Fix and refactor cd for Filesystem Shell.
Reorder check conditions, don't check existence twice.
If building for unix check exec bit on folder.

* Import PermissionsExt only on unix target.

* It seems that this is the correct way?
This commit is contained in:
Kevin DCR 2020-03-06 02:13:47 -05:00 committed by GitHub
parent db24ad8f36
commit 287652573b
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1 changed files with 35 additions and 9 deletions
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44
crates/nu-cli/src/shell/filesystem_shell.rs
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@ -18,6 +18,9 @@ use std::path::PathBuf;
use std::sync::atomic::Ordering;
use trash as SendToTrash;
#[cfg(unix)]
use std::os::unix::fs::PermissionsExt;
pub struct FilesystemShell {
pub(crate) path: String,
pub(crate) last_path: String,
@ -172,8 +175,8 @@ impl Shell for FilesystemShell {
Some(o) => o,
_ => {
return Err(ShellError::labeled_error(
"Can not change to home directory",
"can not go to home",
"Cannot change to home directory",
"cannot go to home",
&args.call_info.name_tag,
))
}
@ -185,25 +188,48 @@ impl Shell for FilesystemShell {
PathBuf::from(&self.last_path)
} else {
let path = PathBuf::from(self.path());
let path = dunce::canonicalize(path.join(&target)).map_err(|_| {
ShellError::labeled_error(
"Cannot change to directory",
"directory not found",
&v.tag,
)
})?;
if target.exists() && !target.is_dir() {
if !path.is_dir() {
return Err(ShellError::labeled_error(
"Can not change to directory",
"Cannot change to directory",
"is not a directory",
&v.tag,
));
}
match dunce::canonicalize(path.join(&target)) {
Ok(p) => p,
Err(_) => {
#[cfg(unix)]
{
let has_exec = path
.metadata()
.map(|m| {
let mode = umask::Mode::from(m.permissions().mode());
mode.has(umask::ALL_EXEC)
})
.map_err(|e| {
ShellError::labeled_error(
"Cannot change to directory",
format!("cannot stat ({})", e),
&v.tag,
)
})?;
if !has_exec {
return Err(ShellError::labeled_error(
"Cannot change to directory",
"directory not found",
"permission denied",
&v.tag,
))
));
}
}
path
}
}
};