`path`

Cross-platform path operations with host-platform semantics.

Usage

lua

path = require "mods.path"

print(path.join("src", "mods", "path.lua")) --> "src/mods/path.lua"
print(path.normpath("a//b/./c"))            --> "a/b/c"
print(path.splitext("archive.tar.gz"))      --> "archive.tar", ".gz"

Functions

Function	Description
`_splitext(path, sep, altsep?, extsep)`	Split extension from a path.

Anchors:

Function	Description
`anchor(path)`	Return drive and root combined.
`drive(path)`	Return drive prefix when present.
`root(path)`	Return root separator segment when present.

Components:

Function	Description
`parents(path)`	Return logical parent paths from nearest to farthest.
`parts(path)`	Split path into logical parts, including anchor when present.
`stem(path)`	Return filename without its final suffix.
`suffixes(path)`	Return all filename suffixes in order.

Conversions:

Function	Description
`as_posix(path)`	Convert backslashes (`\`) to forward slashes (`/`).
`as_uri(path)`	Convert a local path to a `file://` URI.
`from_uri(uri)`	Convert a `file://` URI to a local absolute path.

Decomposition:

Function	Description
`basename(path)`	Return final path component.
`dirname(path)`	Return directory portion of a path.
`split(path)`	Split path into directory head and tail component.
`splitdrive(path)`	Split drive prefix from remainder.
`splitext(path)`	Split path into a root and extension.
`splitroot(path)`	Split path into drive, root, and tail components.

Derived:

Function	Description
`abspath(path)`	Return normalized absolute path.
`commonpath(paths)`	Return longest common sub-path from a path list.
`commonprefix(paths)`	Return longest common leading string prefix.
`relpath(path, start?)`	Return `path` relative to optional `start` path.

Environment:

Function	Description
`cwd`	Return the current working directory path.
`expanduser(path)`	Expand `~` home segment when available.
`expandvars(path)`	Expand vars in a path (`$VAR`/`${VAR}` everywhere, `%VAR%` on Windows).
`home()`	Return the current user's home directory path.

Normalization:

Function	Description
`isabs(path)`	Return `true` when `path` is absolute.
`join(path, ...)`	Join path components.
`normcase(s)`	Normalize path case using the active path semantics.
`normpath(path)`	Normalize separators and dot segments.

Relations:

Function	Description
`is_relative_to(path, other)`	Return `true` when `path` is under `other`.
`relative_to(path, other, walk_up?)`	Return `path` relative to `other`, or `nil` with an error when it is not under `other`.
`with_name(path, name)`	Return a path with the final filename replaced.
`with_stem(path, stem)`	Return a path with the final filename stem replaced.
`with_suffix(path, suffix)`	Return a path with the final filename suffix replaced.

`_splitext(path, sep, altsep?, extsep)`

Split extension from a path. Parameters:

path (string)
sep (string)
altsep? (string)
extsep (string)

Return:

root (string)
ext (string)

Anchors

`anchor(path)`

Return drive and root combined.

Parameters:

path (string): Input path.

Return:

anchor (string): Drive and root anchor.

Example:

lua

path.anchor("c:\\") --> "c:\\"

`drive(path)`

Return drive prefix when present.

Parameters:

path (string): Input path.

Return:

drivePrefix (string): Drive prefix.

Example:

lua

path.drive("c:a/b") --> "c:"
path.drive("a/b")   --> ""

`root(path)`

Return root separator segment when present.

Parameters:

path (string): Input path.

Return:

rootSeparator (string): Root separator segment.

Example:

lua

path.root("/tmp/a.txt") --> "/"
path.root("c:/")        --> "\\"
path.root("a/b")        --> ""

Components

`parents(path)`

Return logical parent paths from nearest to farthest.

Parameters:

path (string): Input path.

Return:

parents (mods.List<string>): Ancestor paths from nearest to farthest.

Example:

lua

path.parents("a/b/c") --> {"a/b", "a", "."}
path.parents("c:a/b") --> {"c:a", "c:"}

`parts(path)`

Split path into logical parts, including anchor when present.

Parameters:

path (string): Input path.

Return:

paths (mods.List<string>): Path parts including anchor when present.

Example:

lua

path.parts("a/b.txt") --> {"a", "b.txt"}
path.parts("/a/b")    --> {"/", "a", "b"}
path.parts("c:a\\b")  --> {"c:", "a", "b"}

`stem(path)`

Return filename without its final suffix.

Parameters:

path (string): Input path.

Return:

stem (string): Filename stem.

Example:

lua

path.stem("archive.tar.gz") --> "archive.tar"
path.stem("c:a/b")          --> "b"

`suffixes(path)`

Return all filename suffixes in order.

Parameters:

path (string): Input path.

Return:

suffixes (mods.List<string>): Filename suffixes.

Example:

lua

path.suffixes("archive.tar.gz") --> {".tar", ".gz"}
path.suffixes("a/b")            --> {}

Conversions

`as_posix(path)`

Convert backslashes (\) to forward slashes (/).

Parameters:

path (string): Input path.

Return:

posixPath (string): POSIX-style path.

Example:

lua

path.as_posix("a\\b\\c") --> "a/b/c"

`as_uri(path)`

Convert a local path to a file:// URI.

Parameters:

path (string): Input path.

Return:

fileUri (string?): File URI.
err (string?): Error message when conversion fails.

Example:

lua

path.as_uri("/home/user/report.txt") --> "file:///home/user/report.txt"
path.as_uri("c:/a/b.c")              --> "file:///c:/a/b.c"
path.as_uri("/a/b%#c")               --> "file:///a/b%25%23c"

`from_uri(uri)`

Convert a file:// URI to a local absolute path.

Parameters:

uri (string): URI value.

Return:

path (string?): Resolved absolute path.
err (string?): Error message when conversion fails.

Example:

lua

path.from_uri("file://localhost/tmp/a.txt") --> "/tmp/a.txt"

Decomposition

`basename(path)`

Return final path component.

Parameters:

path (string): Path to inspect.

Return:

basename (string): Final path component.

Example:

lua

path.basename("/a/b.txt")     --> "b.txt"
path.basename([[C:\a\b.txt]]) --> "b.txt"

`dirname(path)`

Return directory portion of a path.

Parameters:

path (string): Path to inspect.

Return:

dirname (string): Parent directory path.

Example:

lua

path.dirname("/a/b.txt")     --> "/a"
path.dirname([[C:\a\b.txt]]) --> [[C:\a]]

`split(path)`

Split path into directory head and tail component.

Parameters:

path (string): Input path.

Return:

head (string): Directory portion.
tail (string): Final path component.

Example:

lua

path.split("/a/b.txt") --> "/a", "b.txt"

`splitdrive(path)`

Split drive prefix from remainder.

Parameters:

path (string): Input path.

Return:

drive (string): Drive or share prefix when present.
rest (string): Path remainder.

Example:

lua

path.splitdrive("/a/b") --> "", "/a/b"

NOTE

On POSIX semantics the drive portion is always empty.

`splitext(path)`

Split path into a root and extension.

Parameters:

path (string): Input path.

Return:

root (string): Path without the final extension.
ext (string): Final extension including leading dot.

Example:

lua

path.splitext("archive.tar.gz") --> "archive.tar", ".gz"

`splitroot(path)`

Split path into drive, root, and tail components.

Parameters:

path (string): Path to split.

Return:

drive (string): Drive or share prefix (empty on POSIX).
root (string): Root separator segment.
tail (string): Remaining path without leading root separator.

Example:

lua

path.splitroot("/a/b")     --> "", "/", "a/b"
path.splitroot([[C:\a\b]]) --> "C:", [[\]], "a\\b"

Derived

`abspath(path)`

Return normalized absolute path.

Parameters:

path (string): Path to absolutize.

Return:

absolutePath (string): Absolute normalized path.

Example:

lua

path.abspath("/a/./b")      --> "/a/b"
path.abspath([[C:\a\..\b]]) --> [[C:\b]]

`commonpath(paths)`

Return longest common sub-path from a path list.

Parameters:

paths (string[]): List of paths.

Return:

commonPath (string?): Longest common sub-path.
err (string?): Error message when inputs are incompatible.

Example:

lua

path.commonpath({ "/a/b/c", "/a/b/d" })         --> "/a/b"
path.commonpath({ [[C:\a\b\c]], [[c:/a/b/d]] }) --> [[C:\a\b]]

`commonprefix(paths)`

Return longest common leading string prefix.

Parameters:

paths (string[]): List of paths.

Return:

commonPrefix (string): Longest common string prefix.

Example:

lua

path.commonprefix({"abc", "abd"})                         --> "ab"
path.commonprefix({"/home/swen/spam", "/home/swen/eggs"}) --> "/home/swen/"
path.commonprefix({"abc", "xyz"})                         --> ""

`relpath(path, start?)`

Return path relative to optional start path.

Parameters:

path (string): Input path.
start? (string): Optional base path.

Return:

relativePath (string?): Relative path from start to path.
err (string?): Error message when the path cannot be made relative.

Example:

lua

path.relpath("/a/b/c", "/a")         --> "b/c"
path.relpath([[C:\a\b\c]], [[C:\a]]) --> [[b\c]]

Environment

`cwd`

Return the current working directory path.

`expanduser(path)`

Expand ~ home segment when available.

Parameters:

path (string): Path that may begin with ~.

Return:

expandedPath (string?): Path with the home segment expanded when available.
err (string?): Error message when ~ expansion cannot be resolved.

Example:

lua

path.expanduser("~/tmp") --> "<HOME>/tmp" (when HOME is set)
path.expanduser([[x\y]]) --> [[x\y]]

`expandvars(path)`

Expand vars in a path ($VAR/${VAR} everywhere, %VAR% on Windows).

Parameters:

path (string): Path containing variable placeholders.

Return:

expandedPath (string): Path with variable values substituted.

Example:

lua

path.expandvars("$HOME/bin")               --> "/home/me/bin"
path.expandvars("${XDG_CONFIG_HOME}/nvim") --> "/home/me/.config/nvim"
path.expandvars("%USERPROFILE%\\bin")      --> "C:\\Users\\me\\bin"
path.expandvars("$UNKNOWN/bin")            --> "$UNKNOWN/bin"

`home()`

Return the current user's home directory path.

Return:

homePath (string?): Home directory path when available.
err (string?): Error message when the home directory cannot be resolved.

Example:

lua

path.home()

Normalization

`isabs(path)`

Return true when path is absolute.

Parameters:

path (string): Input path.

Return:

isAbsolute (boolean): True when path is absolute.

Example:

lua

path.isabs("/a/b") --> true

`join(path, ...)`

Join path components.

Parameters:

path (string): Base path component.
... (string): Additional path components.

Return:

joinedPath (string): Joined path.

Example:

lua

path.join("/usr", "bin")   --> "/usr/bin"
path.join([[C:/a]], [[b]]) --> [[C:/a\b]]

NOTE

Single input is returned as-is.

`normcase(s)`

Normalize path case using the active path semantics.

Parameters:

s (string): Input path value.

Return:

normalizedPath (string): Path after case normalization.

Example:

lua

path.normcase("ABC")  --> "abc"
path.normcase("/A/B") --> "\\a\\b"

NOTE

On POSIX semantics this returns the input unchanged. Use mods.ntpath to force Windows-style case folding and separator normalization.

`normpath(path)`

Normalize separators and dot segments.

Parameters:

path (string): Path to normalize.

Return:

normalizedPath (string): Normalized path.

Example:

lua

path.normpath("/a//./b/..")   --> "/a"
path.normpath([[A/foo/../B]]) --> [[A\B]]

Relations

`is_relative_to(path, other)`

Return true when path is under other.

Parameters:

path (string): Input path.
other (string): Reference path.

Return:

isRelative (boolean): True when path is under other.

Example:

lua

path.is_relative_to("a/b/c", "a/b") --> true
path.is_relative_to("C:A/B", "c:a") --> true
path.is_relative_to("a/b", "a/b/c") --> false

`relative_to(path, other, walk_up?)`

Return path relative to other, or nil with an error when it is not under other.

When walk_up is true, allow .. segments to walk up to a shared prefix.

Parameters:

path (string): Input path.
other (string): Reference path.
walk_up? (boolean): Allow walking up to a shared prefix.

Return:

relativePath (string?): Path relative to other, or nil on error.
err (string?): Error message when the path cannot be made relative.

Example:

lua

path.relative_to("/a/b/c.txt", "/a")   --> "b/c.txt"
path.relative_to("/a/b", "/a/c", true) --> "../b"
path.relative_to("/a/b", "/a/x")       --> nil, "'/a/b' is not in the subpath of '/a/x'"

`with_name(path, name)`

Return a path with the final filename replaced.

Parameters:

path (string): Input path.
name (string): Replacement filename.

Return:

updatedPath (string?): Path with replaced filename, or nil on error.
err (string?): Error message when replacement fails.

Example:

lua

path.with_name("a/b", "c.txt")     --> "a/c.txt"
path.with_name("a/b.txt", "c.lua") --> "a/c.lua"
path.with_name("a/b", "c/d")       --> nil, "invalid name 'c/d'"
path.with_name("/", "d.xml")       --> nil, "'/' has an empty name"

`with_stem(path, stem)`

Return a path with the final filename stem replaced.

Parameters:

path (string): Input path.
stem (string): Replacement filename stem.

Return:

updatedPath (string?): Path with replaced filename stem, or nil on error.
err (string?): Error message when replacement fails.

Example:

lua

path.with_stem("a/b", "d")     --> "/a/d"
path.with_stem("a/b.lua", "d") --> "/a/d.lua"
path.with_stem("/", "d")       --> "'/' has an empty name"
path.with_stem("a/b", "d")     --> "invalid name ''."

`with_suffix(path, suffix)`

Return a path with the final filename suffix replaced.

Parameters:

path (string): Input path.
suffix (string): Replacement suffix.

Return:

updatedPath (string?): Path with replaced suffix, or nil on error.
err (string?): Error message when replacement fails.

Example:

lua

path.with_suffix("a/b", ".gz")     --> "a/b/.gz"
path.with_suffix("a/b.gz", ".lua") --> "a/b/.lua"
path.with_suffix("a/b", "gz")      --> nil, "invalid suffix 'gz'"
path.with_suffix("//a/b", "gz")    --> nil, "'//a/b' has an empty name"

path ​

Usage ​

Functions ​

_splitext(path, sep, altsep?, extsep) ​

Anchors ​

anchor(path) ​

drive(path) ​

root(path) ​

Components ​

parents(path) ​

parts(path) ​

stem(path) ​

suffixes(path) ​

Conversions ​

as_posix(path) ​

as_uri(path) ​

from_uri(uri) ​

Decomposition ​

basename(path) ​

dirname(path) ​

split(path) ​

splitdrive(path) ​

splitext(path) ​

splitroot(path) ​

Derived ​

abspath(path) ​

commonpath(paths) ​

commonprefix(paths) ​

relpath(path, start?) ​

Environment ​

cwd ​

expanduser(path) ​

expandvars(path) ​

home() ​

Normalization ​

isabs(path) ​

join(path, ...) ​

normcase(s) ​

normpath(path) ​

Relations ​

is_relative_to(path, other) ​

relative_to(path, other, walk_up?) ​

with_name(path, name) ​

with_stem(path, stem) ​

with_suffix(path, suffix) ​

`path`

Usage

Functions

`_splitext(path, sep, altsep?, extsep)`

Anchors

`anchor(path)`

`drive(path)`

`root(path)`

Components

`parents(path)`

`parts(path)`

`stem(path)`

`suffixes(path)`

Conversions

`as_posix(path)`

`as_uri(path)`

`from_uri(uri)`

Decomposition

`basename(path)`

`dirname(path)`

`split(path)`

`splitdrive(path)`

`splitext(path)`

`splitroot(path)`

Derived

`abspath(path)`

`commonpath(paths)`

`commonprefix(paths)`

`relpath(path, start?)`

Environment

`cwd`

`expanduser(path)`

`expandvars(path)`

`home()`

Normalization

`isabs(path)`

`join(path, ...)`

`normcase(s)`

`normpath(path)`

Relations

`is_relative_to(path, other)`

`relative_to(path, other, walk_up?)`

`with_name(path, name)`

`with_stem(path, stem)`

`with_suffix(path, suffix)`