Struct SearchPath

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pub struct SearchPath { /* private fields */ }

Expand description

This is the search path itself, it wraps a list of file paths which can then be used to find file system entries. See the module description for an overview.

Implementations§

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impl SearchPath

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pub fn new(env_var: &str) -> Result<Self, Box<dyn Error>>

Construct a new search path by parsing the environment variable named env_var into separate paths. Paths are separated by the ';' character on Windows, and the ':' character on other platforms.

If the environment variable is not present, or could not be read this function returns an error.

use search_path::SearchPath;

let search_path = SearchPath::new("CMD_PATH").expect("No $CMD_PATH present");

Constructors do not check for duplicate paths, to remove duplicates see the dedup) method.

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pub fn path() -> Result<Self, Box<dyn Error>>

Construct a new search path by parsing the environment variable named PATH.

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pub fn new_or<T: Into<SearchPath>>(env_var: &str, default: T) -> Self

Construct a new search path by parsing the environment variable named env_var into separate paths. Paths are separated by the ';' character on Windows, and the ':' character on other platforms.

If the environment variable is not present, or could not be read this function returns the default value provided instead. The default value may be any value that has an Into implementation for SearchPath.

use search_path::SearchPath;

let search_path = SearchPath::new_or("CMD_PATH", ".");

Constructors do not check for duplicate paths, to remove duplicates see the dedup) method.

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pub fn new_or_default(env_var: &str) -> Self

Construct a new search path by parsing the environment variable named env_var into separate paths. Paths are separated by the ';' character on Windows, and the ':' character on other platforms.

If the environment variable is not present, or could not be read this function returns the value of Default::default() implemented for SearchPath instead.

use search_path::SearchPath;

let search_path = SearchPath::new_or_default("CMD_PATH");

Constructors do not check for duplicate paths, to remove duplicates see the dedup) method.

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pub fn find(&self, file_name: &Path) -> Option<PathBuf>

Return the first file system entity, either file or directory, found in the search path, or None.

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pub fn find_all(&self, file_name: &Path) -> Vec<PathBuf>

Return all the file system entities, either file or directory, found in the search path.

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pub fn find_file(&self, file_name: &Path) -> Option<PathBuf>

Return the first file found in the search path, or None.

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pub fn find_directory(&self, file_name: &Path) -> Option<PathBuf>

Return the first directory found in the search path, or None.

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pub fn find_if_name_only(&self, file_name: &Path) -> Option<PathBuf>

Return the first file found in the search path, or None. This method will only consider file_name if it is not a path, if it has any path components the method will also return None.

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pub fn is_empty(&self) -> bool

Return true if this instance has no paths to search, else false.

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pub fn len(&self) -> usize

Return the current number of paths in the list of paths to search.

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pub fn contains(&self, path: &PathBuf) -> bool

Return true if the list of paths to search contains the path value, else false.

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pub fn contains_cwd(&self) -> bool

Return true if the list of paths to search contains the current directory path, ".", value, else false.

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pub fn iter(&self) -> impl Iterator<Item = &PathBuf>

Return an iterator over all the paths in the list of paths to search.

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pub fn append(&mut self, path: PathBuf)

Append the provided path to the list of paths to search. This operation does not check for duplicate paths, to remove duplicates see the dedup) method.

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pub fn append_cwd(&mut self)

Append the current directory path, ".", to the list of paths to search. This operation does not check for duplicate paths, to remove duplicates see the dedup) method.

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pub fn prepend(&mut self, path: PathBuf)

Prepend the provided path to the list of paths to search. This operation does not check for duplicate paths, to remove duplicates see the dedup) method.

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pub fn prepend_cwd(&mut self)

Prepend the current directory path, ".", to the list of paths to search. This operation does not check for duplicate paths, to remove duplicates see the dedup) method.

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pub fn remove(&mut self, path: &PathBuf)

Remove the path from the list of paths to search, this has no effect if the path was not in the list.

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pub fn dedup(&mut self)

Ensure that only one copy of a path exists in the list of paths to search. This operation will ensure the ordering of paths remains the same and keep the first duplicate it finds and remove any subsequent ones.