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--- Generic utilities for handling pathnames.
module("luarocks.dir", package.seeall)
separator = "/"
--- Strip the path off a path+filename.
-- @param pathname string: A path+name, such as "/a/b/c"
-- or "\a\b\c".
-- @return string: The filename without its path, such as "c".
function base_name(pathname)
assert(type(pathname) == "string")
local base = pathname:gsub("[/\\]*$", ""):match(".*[/\\]([^/\\]*)")
return base or pathname
end
--- Strip the name off a path+filename.
-- @param pathname string: A path+name, such as "/a/b/c".
-- @return string: The filename without its path, such as "/a/b/".
-- For entries such as "/a/b/", "/a/" is returned. If there are
-- no directory separators in input, "" is returned.
function dir_name(pathname)
assert(type(pathname) == "string")
return (pathname:gsub("/*$", ""):match("(.*/)[^/]*")) or ""
end
--- Describe a path in a cross-platform way.
-- Use this function to avoid platform-specific directory
-- separators in other modules. Removes trailing slashes from
-- each component given, to avoid repeated separators.
-- Separators inside strings are kept, to handle URLs containing
-- protocols.
-- @param ... strings representing directories
-- @return string: a string with a platform-specific representation
-- of the path.
function path(...)
local items = {...}
local i = 1
while items[i] do
items[i] = items[i]:gsub("(.+)/+$", "%1")
if items[i] == "" then
table.remove(items, i)
else
i = i + 1
end
end
return (table.concat(items, "/"):gsub("(.+)/+$", "%1"))
end
--- Split protocol and path from an URL or local pathname.
-- URLs should be in the "protocol://path" format.
-- For local pathnames, "file" is returned as the protocol.
-- @param url string: an URL or a local pathname.
-- @return string, string: the protocol, and the pathname without the protocol.
function split_url(url)
assert(type(url) == "string")
local protocol, pathname = url:match("^([^:]*)://(.*)")
if not protocol then
protocol = "file"
pathname = url
end
return protocol, pathname
end
function normalize(name)
return name:gsub("\\", "/"):gsub("(.)/*$", "%1")
end
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