pub struct Normpath(/* private fields */);Expand description
A slice of a normalized path (akin to Path).
Since every normalized path is a path, this type implements Deref to
Path, and can be used wherever a Path is expected in most cases.
This type is #[repr(transparent)] over Path, as such, it is an unsized
type as well, which has to be used behind a pointer like & or Box. For
an owned version of this type, see NormpathBuf.
Details about the normalization invariants can be found in the crate documentation.
Implementations§
Source§impl Normpath
impl Normpath
Sourcepub fn unix_root() -> &'static Self
Available on Unix only.
pub fn unix_root() -> &'static Self
Wraps the root path / as a Normpath slice.
This is a cost-free conversion.
Sourcepub fn validate<S: AsRef<OsStr> + ?Sized>(path: &S) -> Result<&Self, Error>
pub fn validate<S: AsRef<OsStr> + ?Sized>(path: &S) -> Result<&Self, Error>
Validates that path is normalized to wrap it as a Normpath slice.
Among all possible Error variants, this function always fails fast
with the first one encountered. See validate_canonical and
validate_parentless if certain variants are of particular interest.
§Errors
If path is not normalized, returns an Error.
§Examples
use normal_path::{Normpath, Error};
let norm = "/foo/bar";
let path1 = "foo/bar";
let path2 = "/foo/bar/";
let path3 = "/foo/../bar";
assert!(Normpath::validate(norm).is_ok());
assert_eq!(Normpath::validate(path1), Err(Error::NotAbsolute));
assert_eq!(Normpath::validate(path2), Err(Error::NotCanonical));
assert_eq!(Normpath::validate(path3), Err(Error::ContainsParent));Sourcepub fn validate_canonical<S: AsRef<OsStr> + ?Sized>(
path: &S,
) -> Result<&Self, Error>
pub fn validate_canonical<S: AsRef<OsStr> + ?Sized>( path: &S, ) -> Result<&Self, Error>
Validates that path is normalized to wrap it as a Normpath slice,
with a focus on the canonicality of the path.
As such, the function may search the entire path for non-canonical
patterns even with the presence of other errors. See validate if a
fast failure is preferred.
§Errors
If path is not normalized, returns an Error with a certain order
of precedence among all possible variants:
§Notes on Windows
On Windows, a parent directory component that can be normalized
lexically (e.g. C:\foo\..) is considered as Error::NotCanonical
instead of Error::ContainsParent.
See crate documentation for more details about that.
§Examples
use normal_path::{Normpath, Error};
let norm = "/foo/bar";
assert!(Normpath::validate_canonical(norm).is_ok());
let path1 = "/foo/../bar/.";
let path2 = "/foo/../bar";
assert_eq!(Normpath::validate_canonical(path1), Err(Error::NotCanonical));
assert_eq!(Normpath::validate_canonical(path2), Err(Error::ContainsParent));Sourcepub fn validate_parentless<S: AsRef<OsStr> + ?Sized>(
path: &S,
) -> Result<&Self, Error>
pub fn validate_parentless<S: AsRef<OsStr> + ?Sized>( path: &S, ) -> Result<&Self, Error>
Validates that path is normalized to wrap it as a Normpath slice,
with a focus on whether the path contains parent components that
cannot be normalized away.
As such, the function may search the entire path for parent components
even with the presence of other errors. See validate if a fast
failure is preferred.
§Errors
If path is not normalized, returns an Error with a certain order
of precedence among all possible variants:
§Notes on Windows
On Windows, a parent directory component that can be normalized
lexically (e.g. C:\foo\..) is considered as Error::NotCanonical
instead of Error::ContainsParent.
See crate documentation for more details about that.
§Examples
use normal_path::{Normpath, Error};
let norm = "/foo/bar";
assert!(Normpath::validate_parentless(norm).is_ok());
let path1 = "/foo/./bar/..";
let path2 = "/foo/./bar";
assert_eq!(Normpath::validate_parentless(path1), Err(Error::ContainsParent));
assert_eq!(Normpath::validate_parentless(path2), Err(Error::NotCanonical));Windows deals with parent components differently:
use normal_path::{Normpath, Error};
let path1 = r"C:\foo\.\bar\..";
let path2 = r"C:\foo\.\bar";
assert_eq!(Normpath::validate_parentless(path1), Err(Error::NotCanonical));
assert_eq!(Normpath::validate_parentless(path2), Err(Error::NotCanonical));
let path3 = r"C:\foo\.\bar\..\..\..";
assert_eq!(Normpath::validate_parentless(path3), Err(Error::ContainsParent));Sourcepub fn normalize<S: AsRef<OsStr> + ?Sized>(
path: &S,
) -> Result<Cow<'_, Self>, Error>
pub fn normalize<S: AsRef<OsStr> + ?Sized>( path: &S, ) -> Result<Cow<'_, Self>, Error>
Validates that path is normalized to wrap it as a Normpath slice
while trying to normalize non-canonical patterns.
-
If the path is already normalized, a borrowed slice is returned.
-
If the path only contains non-canonical patterns, an owned version is returned as the result of normalization.
§Errors
If path is not absolute or contains parent components that cannot be
normalized away, returns an Error. This implies NotCanonical
will never be returned.
§Examples
use std::borrow::Cow;
use normal_path::{Normpath, Error};
let norm = Normpath::normalize("/foo/bar").unwrap();
let path1 = Normpath::normalize("foo/bar").unwrap_err();
let path2 = Normpath::normalize("/foo/./bar/").unwrap();
let path3 = Normpath::normalize("/foo/../bar").unwrap_err();
assert!(matches!(norm, Cow::Borrowed(_)));
assert_eq!(&*norm, "/foo/bar");
assert_eq!(path1, Error::NotAbsolute);
assert!(matches!(path2, Cow::Owned(_)));
assert_eq!(&*path2, "/foo/bar");
assert_eq!(path3, Error::ContainsParent);Windows deals with parent components differently:
use std::borrow::Cow;
use normal_path::{Normpath, Error};
let path3 = Normpath::normalize(r"C:\foo\..\bar").unwrap();
let path4 = Normpath::normalize(r"C:\foo\..\bar\..\..").unwrap_err();
assert!(matches!(path3, Cow::Owned(_)));
assert_eq!(&*path3, r"C:\bar");
assert_eq!(path4, Error::ContainsParent);Sourcepub unsafe fn new_unchecked<S: AsRef<OsStr> + ?Sized>(path: &S) -> &Self
pub unsafe fn new_unchecked<S: AsRef<OsStr> + ?Sized>(path: &S) -> &Self
Wraps path as a Normpath slice without any validation.
§Safety
path must be a normalized path, such that validate would succeed.
§Examples
use normal_path::Normpath;
let path = "/foo/bar";
assert!(Normpath::validate(path).is_ok());
// SAFETY: already validated
let norm = unsafe { Normpath::new_unchecked(path) };Sourcepub fn parent(&self) -> Option<&Self>
pub fn parent(&self) -> Option<&Self>
Returns the Normpath without the final component, if the path doesn’t
end with the root.
This function effectively shadows Path::parent but is entirely
compatible in most cases. In case the original method is desired,
use self.as_path().parent() to invoke it.
Sourcepub fn windows_split_components(&self) -> (PrefixComponent<'_>, Components<'_>)
Available on Windows only.
pub fn windows_split_components(&self) -> (PrefixComponent<'_>, Components<'_>)
Splits self.components into the prefix part and the rest.
§Examples
use std::path::{Component, Prefix};
use normal_path::Normpath;
let path = Normpath::validate(r"C:\a").unwrap();
let (prefix, mut components) = path.windows_split_components();
assert_eq!(prefix.kind(), Prefix::Disk(b'C'));
assert_eq!(components.next(), Some(Component::RootDir));
assert_eq!(components.next(), Some(Component::Normal("a".as_ref())));
assert_eq!(components.next(), None);Sourcepub fn windows_prefix(&self) -> PrefixComponent<'_>
Available on Windows only.
pub fn windows_prefix(&self) -> PrefixComponent<'_>
Returns the prefix component of self.
Sourcepub fn split_components(&self) -> Option<(PrefixComponent<'_>, Components<'_>)>
pub fn split_components(&self) -> Option<(PrefixComponent<'_>, Components<'_>)>
Splits self.components into the prefix part and the rest, if there
is a prefix.
This is equivalent to windows_split_components on Windows, while
returning None on other platforms.
§Examples
use std::path::Component;
use normal_path::Normpath;
let path = if cfg!(windows) { r"C:\a" } else { "/a" };
let norm = Normpath::validate(path).unwrap();
let mut components = match norm.split_components() {
Some((_, components)) => components,
None => norm.components(),
};
assert_eq!(components.next(), Some(Component::RootDir));
assert_eq!(components.next(), Some(Component::Normal("a".as_ref())));
assert_eq!(components.next(), None);Sourcepub fn prefix(&self) -> Option<PrefixComponent<'_>>
pub fn prefix(&self) -> Option<PrefixComponent<'_>>
Returns the prefix component of self, if there is one.
This is equivalent to windows_prefix on Windows, while returning
None on other platforms.
Sourcepub fn checked_join<P: AsRef<Path>>(
&self,
path: P,
) -> Result<NormpathBuf, Error>
pub fn checked_join<P: AsRef<Path>>( &self, path: P, ) -> Result<NormpathBuf, Error>
Creates an owned NormpathBuf with path adjoined to self, with
normalization.
See PathBuf::push for more details on what it means to adjoin a
path.
§Errors
If the resulting path cannot be normalized, returns an Error. This
implies NotCanonical will never be returned.
Sourcepub fn quick_strip_prefix<P: AsRef<Path>>(&self, base: P) -> Option<&Path>
pub fn quick_strip_prefix<P: AsRef<Path>>(&self, base: P) -> Option<&Path>
Returns a path that, when joined onto base, yields self.
If base is not a prefix of self, returns None.
Compared to Path::strip_prefix, this function only performs
byte-level comparison, skipping the parsing as an optimization.
§Examples
use std::path::Path;
use normal_path::Normpath;
let norm = Normpath::validate("/foo/bar/baz").unwrap();
let base1 = Path::new("/foo/bar");
let base2 = Path::new("/foo/./bar");
let base3 = Path::new("/foo/ba");
// strip_prefix parses paths and thus both are accepted
assert!(norm.strip_prefix(base1).is_ok());
assert!(norm.strip_prefix(base2).is_ok());
// But quick_strip_prefix only compares bytes
assert!(norm.quick_strip_prefix(base1).is_some());
assert!(norm.quick_strip_prefix(base2).is_none());
// Both functions are otherwise the same
assert!(norm.strip_prefix(base3).is_err());
assert!(norm.quick_strip_prefix(base3).is_none());Sourcepub fn quick_starts_with<P: AsRef<Path>>(&self, base: P) -> bool
pub fn quick_starts_with<P: AsRef<Path>>(&self, base: P) -> bool
Determines whether base is a prefix of self.
Compared to Path::starts_with, this function only performs
byte-level comparison, skipping the parsing as an optimization.
§Examples
use std::path::Path;
use normal_path::Normpath;
let norm = Normpath::validate("/foo/bar/baz").unwrap();
let base1 = Path::new("/foo/bar");
let base2 = Path::new("/foo/./bar");
let base3 = Path::new("/foo/ba");
// starts_with parses paths and thus both are accepted
assert!(norm.starts_with(base1));
assert!(norm.starts_with(base2));
// But quick_starts_with only compares bytes
assert!(norm.quick_starts_with(base1));
assert!(!norm.quick_starts_with(base2));
// Both functions are otherwise the same
assert!(!norm.starts_with(base3));
assert!(!norm.quick_starts_with(base3));Methods from Deref<Target = Path>§
1.0.0 · Sourcepub fn to_str(&self) -> Option<&str>
pub fn to_str(&self) -> Option<&str>
Yields a &str slice if the Path is valid unicode.
This conversion may entail doing a check for UTF-8 validity. Note that validation is performed because non-UTF-8 strings are perfectly valid for some OS.
§Examples
use std::path::Path;
let path = Path::new("foo.txt");
assert_eq!(path.to_str(), Some("foo.txt"));1.0.0 · Sourcepub fn to_string_lossy(&self) -> Cow<'_, str>
pub fn to_string_lossy(&self) -> Cow<'_, str>
Converts a Path to a Cow<str>.
Any non-UTF-8 sequences are replaced with
U+FFFD REPLACEMENT CHARACTER.
§Examples
Calling to_string_lossy on a Path with valid unicode:
use std::path::Path;
let path = Path::new("foo.txt");
assert_eq!(path.to_string_lossy(), "foo.txt");Had path contained invalid unicode, the to_string_lossy call might
have returned "fo�.txt".
1.0.0 · Sourcepub fn to_path_buf(&self) -> PathBuf
pub fn to_path_buf(&self) -> PathBuf
1.0.0 · Sourcepub fn is_absolute(&self) -> bool
pub fn is_absolute(&self) -> bool
Returns true if the Path is absolute, i.e., if it is independent of
the current directory.
-
On Unix, a path is absolute if it starts with the root, so
is_absoluteandhas_rootare equivalent. -
On Windows, a path is absolute if it has a prefix and starts with the root:
c:\windowsis absolute, whilec:tempand\tempare not.
§Examples
use std::path::Path;
assert!(!Path::new("foo.txt").is_absolute());1.0.0 · Sourcepub fn is_relative(&self) -> bool
pub fn is_relative(&self) -> bool
Returns true if the Path is relative, i.e., not absolute.
See is_absolute’s documentation for more details.
§Examples
use std::path::Path;
assert!(Path::new("foo.txt").is_relative());1.0.0 · Sourcepub fn has_root(&self) -> bool
pub fn has_root(&self) -> bool
Returns true if the Path has a root.
-
On Unix, a path has a root if it begins with
/. -
On Windows, a path has a root if it:
- has no prefix and begins with a separator, e.g.,
\windows - has a prefix followed by a separator, e.g.,
c:\windowsbut notc:windows - has any non-disk prefix, e.g.,
\\server\share
- has no prefix and begins with a separator, e.g.,
§Examples
use std::path::Path;
assert!(Path::new("/etc/passwd").has_root());1.0.0 · Sourcepub fn parent(&self) -> Option<&Path>
pub fn parent(&self) -> Option<&Path>
Returns the Path without its final component, if there is one.
This means it returns Some("") for relative paths with one component.
Returns None if the path terminates in a root or prefix, or if it’s
the empty string.
§Examples
use std::path::Path;
let path = Path::new("/foo/bar");
let parent = path.parent().unwrap();
assert_eq!(parent, Path::new("/foo"));
let grand_parent = parent.parent().unwrap();
assert_eq!(grand_parent, Path::new("/"));
assert_eq!(grand_parent.parent(), None);
let relative_path = Path::new("foo/bar");
let parent = relative_path.parent();
assert_eq!(parent, Some(Path::new("foo")));
let grand_parent = parent.and_then(Path::parent);
assert_eq!(grand_parent, Some(Path::new("")));
let great_grand_parent = grand_parent.and_then(Path::parent);
assert_eq!(great_grand_parent, None);1.28.0 · Sourcepub fn ancestors(&self) -> Ancestors<'_>
pub fn ancestors(&self) -> Ancestors<'_>
Produces an iterator over Path and its ancestors.
The iterator will yield the Path that is returned if the parent method is used zero
or more times. If the parent method returns None, the iterator will do likewise.
The iterator will always yield at least one value, namely Some(&self). Next it will yield
&self.parent(), &self.parent().and_then(Path::parent) and so on.
§Examples
use std::path::Path;
let mut ancestors = Path::new("/foo/bar").ancestors();
assert_eq!(ancestors.next(), Some(Path::new("/foo/bar")));
assert_eq!(ancestors.next(), Some(Path::new("/foo")));
assert_eq!(ancestors.next(), Some(Path::new("/")));
assert_eq!(ancestors.next(), None);
let mut ancestors = Path::new("../foo/bar").ancestors();
assert_eq!(ancestors.next(), Some(Path::new("../foo/bar")));
assert_eq!(ancestors.next(), Some(Path::new("../foo")));
assert_eq!(ancestors.next(), Some(Path::new("..")));
assert_eq!(ancestors.next(), Some(Path::new("")));
assert_eq!(ancestors.next(), None);1.0.0 · Sourcepub fn file_name(&self) -> Option<&OsStr>
pub fn file_name(&self) -> Option<&OsStr>
Returns the final component of the Path, if there is one.
If the path is a normal file, this is the file name. If it’s the path of a directory, this is the directory name.
Returns None if the path terminates in ...
§Examples
use std::path::Path;
use std::ffi::OsStr;
assert_eq!(Some(OsStr::new("bin")), Path::new("/usr/bin/").file_name());
assert_eq!(Some(OsStr::new("foo.txt")), Path::new("tmp/foo.txt").file_name());
assert_eq!(Some(OsStr::new("foo.txt")), Path::new("foo.txt/.").file_name());
assert_eq!(Some(OsStr::new("foo.txt")), Path::new("foo.txt/.//").file_name());
assert_eq!(None, Path::new("foo.txt/..").file_name());
assert_eq!(None, Path::new("/").file_name());1.7.0 · Sourcepub fn strip_prefix<P>(&self, base: P) -> Result<&Path, StripPrefixError>
pub fn strip_prefix<P>(&self, base: P) -> Result<&Path, StripPrefixError>
Returns a path that, when joined onto base, yields self.
§Errors
If base is not a prefix of self (i.e., starts_with
returns false), returns Err.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("/test/haha/foo.txt");
assert_eq!(path.strip_prefix("/"), Ok(Path::new("test/haha/foo.txt")));
assert_eq!(path.strip_prefix("/test"), Ok(Path::new("haha/foo.txt")));
assert_eq!(path.strip_prefix("/test/"), Ok(Path::new("haha/foo.txt")));
assert_eq!(path.strip_prefix("/test/haha/foo.txt"), Ok(Path::new("")));
assert_eq!(path.strip_prefix("/test/haha/foo.txt/"), Ok(Path::new("")));
assert!(path.strip_prefix("test").is_err());
assert!(path.strip_prefix("/te").is_err());
assert!(path.strip_prefix("/haha").is_err());
let prefix = PathBuf::from("/test/");
assert_eq!(path.strip_prefix(prefix), Ok(Path::new("haha/foo.txt")));1.0.0 · Sourcepub fn starts_with<P>(&self, base: P) -> bool
pub fn starts_with<P>(&self, base: P) -> bool
Determines whether base is a prefix of self.
Only considers whole path components to match.
§Examples
use std::path::Path;
let path = Path::new("/etc/passwd");
assert!(path.starts_with("/etc"));
assert!(path.starts_with("/etc/"));
assert!(path.starts_with("/etc/passwd"));
assert!(path.starts_with("/etc/passwd/")); // extra slash is okay
assert!(path.starts_with("/etc/passwd///")); // multiple extra slashes are okay
assert!(!path.starts_with("/e"));
assert!(!path.starts_with("/etc/passwd.txt"));
assert!(!Path::new("/etc/foo.rs").starts_with("/etc/foo"));1.0.0 · Sourcepub fn ends_with<P>(&self, child: P) -> bool
pub fn ends_with<P>(&self, child: P) -> bool
Determines whether child is a suffix of self.
Only considers whole path components to match.
§Examples
use std::path::Path;
let path = Path::new("/etc/resolv.conf");
assert!(path.ends_with("resolv.conf"));
assert!(path.ends_with("etc/resolv.conf"));
assert!(path.ends_with("/etc/resolv.conf"));
assert!(!path.ends_with("/resolv.conf"));
assert!(!path.ends_with("conf")); // use .extension() insteadSourcepub fn is_empty(&self) -> bool
🔬This is a nightly-only experimental API. (path_is_empty)
pub fn is_empty(&self) -> bool
path_is_empty)Checks whether the Path is empty.
§Examples
#![feature(path_is_empty)]
use std::path::Path;
let path = Path::new("");
assert!(path.is_empty());
let path = Path::new("foo");
assert!(!path.is_empty());
let path = Path::new(".");
assert!(!path.is_empty());1.0.0 · Sourcepub fn file_stem(&self) -> Option<&OsStr>
pub fn file_stem(&self) -> Option<&OsStr>
Extracts the stem (non-extension) portion of self.file_name.
The stem is:
None, if there is no file name;- The entire file name if there is no embedded
.; - The entire file name if the file name begins with
.and has no other.s within; - Otherwise, the portion of the file name before the final
.
§Examples
use std::path::Path;
assert_eq!("foo", Path::new("foo.rs").file_stem().unwrap());
assert_eq!("foo.tar", Path::new("foo.tar.gz").file_stem().unwrap());§See Also
This method is similar to Path::file_prefix, which extracts the portion of the file name
before the first .
1.91.0 · Sourcepub fn file_prefix(&self) -> Option<&OsStr>
pub fn file_prefix(&self) -> Option<&OsStr>
Extracts the prefix of self.file_name.
The prefix is:
None, if there is no file name;- The entire file name if there is no embedded
.; - The portion of the file name before the first non-beginning
.; - The entire file name if the file name begins with
.and has no other.s within; - The portion of the file name before the second
.if the file name begins with.
§Examples
use std::path::Path;
assert_eq!("foo", Path::new("foo.rs").file_prefix().unwrap());
assert_eq!("foo", Path::new("foo.tar.gz").file_prefix().unwrap());
assert_eq!(".config", Path::new(".config").file_prefix().unwrap());
assert_eq!(".config", Path::new(".config.toml").file_prefix().unwrap());§See Also
This method is similar to Path::file_stem, which extracts the portion of the file name
before the last .
1.0.0 · Sourcepub fn extension(&self) -> Option<&OsStr>
pub fn extension(&self) -> Option<&OsStr>
Extracts the extension (without the leading dot) of self.file_name, if possible.
The extension is:
None, if there is no file name;None, if there is no embedded.;None, if the file name begins with.and has no other.s within;- Otherwise, the portion of the file name after the final
.
§Examples
use std::path::Path;
assert_eq!("rs", Path::new("foo.rs").extension().unwrap());
assert_eq!("gz", Path::new("foo.tar.gz").extension().unwrap());Sourcepub fn has_trailing_sep(&self) -> bool
🔬This is a nightly-only experimental API. (path_trailing_sep)
pub fn has_trailing_sep(&self) -> bool
path_trailing_sep)Checks whether the path ends in a trailing separator.
This is generally done to ensure that a path is treated as a directory, not a file, although it does not actually guarantee that such a path is a directory on the underlying file system.
Despite this behavior, two paths are still considered the same in Rust whether they have a trailing separator or not.
§Examples
#![feature(path_trailing_sep)]
use std::path::Path;
assert!(Path::new("dir/").has_trailing_sep());
assert!(!Path::new("file.rs").has_trailing_sep());Sourcepub fn with_trailing_sep(&self) -> Cow<'_, Path>
🔬This is a nightly-only experimental API. (path_trailing_sep)
pub fn with_trailing_sep(&self) -> Cow<'_, Path>
path_trailing_sep)Ensures that a path has a trailing separator,
allocating a PathBuf if necessary.
The resulting path will return true for has_trailing_sep.
§Examples
#![feature(path_trailing_sep)]
use std::ffi::OsStr;
use std::path::Path;
assert_eq!(Path::new("dir//").with_trailing_sep().as_os_str(), OsStr::new("dir//"));
assert_eq!(Path::new("dir/").with_trailing_sep().as_os_str(), OsStr::new("dir/"));
assert!(!Path::new("dir").has_trailing_sep());
assert!(Path::new("dir").with_trailing_sep().has_trailing_sep());Sourcepub fn trim_trailing_sep(&self) -> &Path
🔬This is a nightly-only experimental API. (path_trailing_sep)
pub fn trim_trailing_sep(&self) -> &Path
path_trailing_sep)Trims a trailing separator from a path, if possible.
The resulting path will return false for has_trailing_sep for
most paths.
Some paths, like /, cannot be trimmed in this way.
§Examples
#![feature(path_trailing_sep)]
use std::ffi::OsStr;
use std::path::Path;
assert_eq!(Path::new("dir//").trim_trailing_sep().as_os_str(), OsStr::new("dir"));
assert_eq!(Path::new("dir/").trim_trailing_sep().as_os_str(), OsStr::new("dir"));
assert_eq!(Path::new("dir").trim_trailing_sep().as_os_str(), OsStr::new("dir"));
assert_eq!(Path::new("/").trim_trailing_sep().as_os_str(), OsStr::new("/"));
assert_eq!(Path::new("//").trim_trailing_sep().as_os_str(), OsStr::new("//"));1.0.0 · Sourcepub fn join<P>(&self, path: P) -> PathBuf
pub fn join<P>(&self, path: P) -> PathBuf
Creates an owned PathBuf with path adjoined to self.
If path is absolute, it replaces the current path.
On Windows:
- if
pathhas a root but no prefix (e.g.,\windows), it replaces and returns everything except for the prefix (if any) ofself. - if
pathhas a prefix but no root,selfis ignored andpathis returned. - if
selfhas a verbatim prefix (e.g.\\?\C:\windows) andpathis not empty, the new path is normalized: all references to.and..are removed.
See PathBuf::push for more details on what it means to adjoin a path.
§Examples
use std::path::{Path, PathBuf};
assert_eq!(Path::new("/etc").join("passwd"), PathBuf::from("/etc/passwd"));
assert_eq!(Path::new("/etc").join("/bin/sh"), PathBuf::from("/bin/sh"));1.0.0 · Sourcepub fn with_file_name<S>(&self, file_name: S) -> PathBuf
pub fn with_file_name<S>(&self, file_name: S) -> PathBuf
Creates an owned PathBuf like self but with the given file name.
See PathBuf::set_file_name for more details.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("/tmp/foo.png");
assert_eq!(path.with_file_name("bar"), PathBuf::from("/tmp/bar"));
assert_eq!(path.with_file_name("bar.txt"), PathBuf::from("/tmp/bar.txt"));
let path = Path::new("/tmp");
assert_eq!(path.with_file_name("var"), PathBuf::from("/var"));1.0.0 · Sourcepub fn with_extension<S>(&self, extension: S) -> PathBuf
pub fn with_extension<S>(&self, extension: S) -> PathBuf
Creates an owned PathBuf like self but with the given extension.
See PathBuf::set_extension for more details.
§Examples
use std::path::Path;
let path = Path::new("foo.rs");
assert_eq!(path.with_extension("txt"), Path::new("foo.txt"));
assert_eq!(path.with_extension(""), Path::new("foo"));Handling multiple extensions:
use std::path::Path;
let path = Path::new("foo.tar.gz");
assert_eq!(path.with_extension("xz"), Path::new("foo.tar.xz"));
assert_eq!(path.with_extension("").with_extension("txt"), Path::new("foo.txt"));Adding an extension where one did not exist:
use std::path::Path;
let path = Path::new("foo");
assert_eq!(path.with_extension("rs"), Path::new("foo.rs"));1.91.0 · Sourcepub fn with_added_extension<S>(&self, extension: S) -> PathBuf
pub fn with_added_extension<S>(&self, extension: S) -> PathBuf
Creates an owned PathBuf like self but with the extension added.
See PathBuf::add_extension for more details.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("foo.rs");
assert_eq!(path.with_added_extension("txt"), PathBuf::from("foo.rs.txt"));
let path = Path::new("foo.tar.gz");
assert_eq!(path.with_added_extension(""), PathBuf::from("foo.tar.gz"));
assert_eq!(path.with_added_extension("xz"), PathBuf::from("foo.tar.gz.xz"));
assert_eq!(path.with_added_extension("").with_added_extension("txt"), PathBuf::from("foo.tar.gz.txt"));1.0.0 · Sourcepub fn components(&self) -> Components<'_>
pub fn components(&self) -> Components<'_>
Produces an iterator over the Components of the path.
When parsing the path, there is a small amount of normalization:
-
Repeated separators are ignored, so
a/banda//bboth haveaandbas components. -
Occurrences of
.are normalized away, except if they are at the beginning of the path. For example,a/./b,a/b/,a/b/.anda/ball haveaandbas components, but./a/bstarts with an additionalCurDircomponent. -
Trailing separators are normalized away, so
/a/band/a/b/are equivalent.
Note that no other normalization takes place; in particular, a/c
and a/b/../c are distinct, to account for the possibility that b
is a symbolic link (so its parent isn’t a).
§Examples
use std::path::{Path, Component};
use std::ffi::OsStr;
let mut components = Path::new("/tmp/foo.txt").components();
assert_eq!(components.next(), Some(Component::RootDir));
assert_eq!(components.next(), Some(Component::Normal(OsStr::new("tmp"))));
assert_eq!(components.next(), Some(Component::Normal(OsStr::new("foo.txt"))));
assert_eq!(components.next(), None)1.0.0 · Sourcepub fn iter(&self) -> Iter<'_>
pub fn iter(&self) -> Iter<'_>
Produces an iterator over the path’s components viewed as OsStr
slices.
For more information about the particulars of how the path is separated
into components, see components.
§Examples
use std::path::{self, Path};
use std::ffi::OsStr;
let mut it = Path::new("/tmp/foo.txt").iter();
assert_eq!(it.next(), Some(OsStr::new(&path::MAIN_SEPARATOR.to_string())));
assert_eq!(it.next(), Some(OsStr::new("tmp")));
assert_eq!(it.next(), Some(OsStr::new("foo.txt")));
assert_eq!(it.next(), None)1.0.0 · Sourcepub fn display(&self) -> Display<'_>
pub fn display(&self) -> Display<'_>
Returns an object that implements Display for safely printing paths
that may contain non-Unicode data. This may perform lossy conversion,
depending on the platform. If you would like an implementation which
escapes the path please use Debug instead.
§Examples
use std::path::Path;
let path = Path::new("/tmp/foo.rs");
println!("{}", path.display());1.95.0 · Sourcepub fn as_path(&self) -> &Path
pub fn as_path(&self) -> &Path
Returns the same path as &Path.
This method is redundant when used directly on &Path, but
it helps dereferencing other PathBuf-like types to Paths,
for example references to Box<Path> or Arc<Path>.
1.5.0 · Sourcepub fn metadata(&self) -> Result<Metadata, Error>
pub fn metadata(&self) -> Result<Metadata, Error>
Queries the file system to get information about a file, directory, etc.
This function will traverse symbolic links to query information about the destination file.
This is an alias to fs::metadata.
§Examples
use std::path::Path;
let path = Path::new("/Minas/tirith");
let metadata = path.metadata().expect("metadata call failed");
println!("{:?}", metadata.file_type());1.5.0 · Sourcepub fn symlink_metadata(&self) -> Result<Metadata, Error>
pub fn symlink_metadata(&self) -> Result<Metadata, Error>
Queries the metadata about a file without following symlinks.
This is an alias to fs::symlink_metadata.
§Examples
use std::path::Path;
let path = Path::new("/Minas/tirith");
let metadata = path.symlink_metadata().expect("symlink_metadata call failed");
println!("{:?}", metadata.file_type());1.5.0 · Sourcepub fn canonicalize(&self) -> Result<PathBuf, Error>
pub fn canonicalize(&self) -> Result<PathBuf, Error>
Returns the canonical, absolute form of the path with all intermediate components normalized and symbolic links resolved.
This is an alias to fs::canonicalize.
§Errors
This method will return an error in the following situations, but is not limited to just these cases:
pathdoes not exist.- A non-final component in path is not a directory.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("/foo/test/../test/bar.rs");
assert_eq!(path.canonicalize().unwrap(), PathBuf::from("/foo/test/bar.rs"));Sourcepub fn normalize_lexically(&self) -> Result<PathBuf, NormalizeError>
🔬This is a nightly-only experimental API. (normalize_lexically)
pub fn normalize_lexically(&self) -> Result<PathBuf, NormalizeError>
normalize_lexically)Normalize a path, including .. without traversing the filesystem.
Returns an error if normalization would leave leading .. components.
This function always resolves .. to the “lexical” parent.
That is “a/b/../c” will always resolve to a/c which can change the meaning of the path.
In particular, a/c and a/b/../c are distinct on many systems because b may be a symbolic link, so its parent isn’t a.
path::absolute is an alternative that preserves ...
Or Path::canonicalize can be used to resolve any .. by querying the filesystem.
1.5.0 · Sourcepub fn read_link(&self) -> Result<PathBuf, Error>
pub fn read_link(&self) -> Result<PathBuf, Error>
Reads a symbolic link, returning the file that the link points to.
This is an alias to fs::read_link.
§Examples
use std::path::Path;
let path = Path::new("/laputa/sky_castle.rs");
let path_link = path.read_link().expect("read_link call failed");1.5.0 · Sourcepub fn read_dir(&self) -> Result<ReadDir, Error>
pub fn read_dir(&self) -> Result<ReadDir, Error>
Returns an iterator over the entries within a directory.
The iterator will yield instances of io::Result<fs::DirEntry>. New
errors may be encountered after an iterator is initially constructed.
This is an alias to fs::read_dir.
§Examples
use std::path::Path;
let path = Path::new("/laputa");
for entry in path.read_dir().expect("read_dir call failed") {
if let Ok(entry) = entry {
println!("{:?}", entry.path());
}
}1.5.0 · Sourcepub fn exists(&self) -> bool
pub fn exists(&self) -> bool
Returns true if the path points at an existing entity.
Warning: this method may be error-prone, consider using try_exists() instead!
It also has a risk of introducing time-of-check to time-of-use (TOCTOU) bugs.
This function will traverse symbolic links to query information about the destination file.
If you cannot access the metadata of the file, e.g. because of a
permission error or broken symbolic links, this will return false.
§Examples
use std::path::Path;
assert!(!Path::new("does_not_exist.txt").exists());§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call Path::try_exists.
1.63.0 · Sourcepub fn try_exists(&self) -> Result<bool, Error>
pub fn try_exists(&self) -> Result<bool, Error>
Returns Ok(true) if the path points at an existing entity.
This function will traverse symbolic links to query information about the
destination file. In case of broken symbolic links this will return Ok(false).
Path::exists() only checks whether or not a path was both found and readable. By
contrast, try_exists will return Ok(true) or Ok(false), respectively, if the path
was verified to exist or not exist. If its existence can neither be confirmed nor
denied, it will propagate an Err(_) instead. This can be the case if e.g. listing
permission is denied on one of the parent directories.
Note that while this avoids some pitfalls of the exists() method, it still can not
prevent time-of-check to time-of-use (TOCTOU) bugs. You should only use it in scenarios
where those bugs are not an issue.
This is an alias for std::fs::exists.
§Examples
use std::path::Path;
assert!(!Path::new("does_not_exist.txt").try_exists().expect("Can't check existence of file does_not_exist.txt"));
assert!(Path::new("/root/secret_file.txt").try_exists().is_err());1.5.0 · Sourcepub fn is_file(&self) -> bool
pub fn is_file(&self) -> bool
Returns true if the path exists on disk and is pointing at a regular file.
This function will traverse symbolic links to query information about the destination file.
If you cannot access the metadata of the file, e.g. because of a
permission error or broken symbolic links, this will return false.
§Examples
use std::path::Path;
assert_eq!(Path::new("./is_a_directory/").is_file(), false);
assert_eq!(Path::new("a_file.txt").is_file(), true);§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call fs::metadata and handle its Result. Then call
fs::Metadata::is_file if it was Ok.
When the goal is simply to read from (or write to) the source, the most
reliable way to test the source can be read (or written to) is to open
it. Only using is_file can break workflows like diff <( prog_a ) on
a Unix-like system for example. See fs::File::open or
fs::OpenOptions::open for more information.
1.5.0 · Sourcepub fn is_dir(&self) -> bool
pub fn is_dir(&self) -> bool
Returns true if the path exists on disk and is pointing at a directory.
This function will traverse symbolic links to query information about the destination file.
If you cannot access the metadata of the file, e.g. because of a
permission error or broken symbolic links, this will return false.
§Examples
use std::path::Path;
assert_eq!(Path::new("./is_a_directory/").is_dir(), true);
assert_eq!(Path::new("a_file.txt").is_dir(), false);§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call fs::metadata and handle its Result. Then call
fs::Metadata::is_dir if it was Ok.
1.58.0 · Sourcepub fn is_symlink(&self) -> bool
pub fn is_symlink(&self) -> bool
Returns true if the path exists on disk and is pointing at a symbolic link.
This function will not traverse symbolic links. In case of a broken symbolic link this will also return true.
If you cannot access the directory containing the file, e.g., because of a permission error, this will return false.
§Examples
use std::path::Path;
use std::os::unix::fs::symlink;
let link_path = Path::new("link");
symlink("/origin_does_not_exist/", link_path).unwrap();
assert_eq!(link_path.is_symlink(), true);
assert_eq!(link_path.exists(), false);§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call fs::symlink_metadata and handle its Result. Then call
fs::Metadata::is_symlink if it was Ok.
Trait Implementations§
Source§impl AsRef<Normpath> for NormpathBuf
impl AsRef<Normpath> for NormpathBuf
Source§impl Borrow<Normpath> for NormpathBuf
impl Borrow<Normpath> for NormpathBuf
Source§impl<'a, 'de: 'a> Deserialize<'de> for &'a Normpath
Available on crate feature serde only.
impl<'a, 'de: 'a> Deserialize<'de> for &'a Normpath
serde only.Source§fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>
Source§impl<'de> Deserialize<'de> for Box<Normpath>
Available on crate feature serde only.
impl<'de> Deserialize<'de> for Box<Normpath>
serde only.Source§fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>
Source§impl From<&Normpath> for NormpathBuf
impl From<&Normpath> for NormpathBuf
Source§impl From<NormpathBuf> for Box<Normpath>
impl From<NormpathBuf> for Box<Normpath>
Source§fn from(value: NormpathBuf) -> Self
fn from(value: NormpathBuf) -> Self
Creates a boxed Normpath from a NormpathBuf.
This can allocate and copy the data depending on the implementation of the standard library, but typically it will not.