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--- Generic utilities for handling pathnames.
local dir = {}
local core = require("luarocks.core.dir")
dir.path = core.path
dir.split_url = core.split_url
--- 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 dir.base_name(pathname)
assert(type(pathname) == "string")
local base = pathname:gsub("[/\\]*$", ""):match(".*[/\\]([^/\\]*)")
return base or pathname
end
--- Strip the name off a path+filename.
-- @param pathname string: A path+name, such as "/a/b/c".
-- @return string: The filename without its path, such as "/a/b".
-- For entries such as "/a/b/", "/a" is returned. If there are
-- no directory separators in input, "" is returned.
function dir.dir_name(pathname)
assert(type(pathname) == "string")
return (pathname:gsub("/*$", ""):match("(.*)[/]+[^/]*")) or ""
end
--- Normalize a url or local path.
-- URLs should be in the "protocol://path" format. System independent
-- forward slashes are used, removing trailing and double slashes
-- @param url string: an URL or a local pathname.
-- @return string: Normalized result.
function dir.normalize(name)
local protocol, pathname = dir.split_url(name)
pathname = pathname:gsub("\\", "/"):gsub("(.)/*$", "%1"):gsub("//", "/")
if protocol ~= "file" then pathname = protocol .."://"..pathname end
return pathname
end
--- Returns true if protocol does not require additional tools.
-- @param protocol The protocol name
function dir.is_basic_protocol(protocol)
return protocol == "http" or protocol == "https" or protocol == "ftp" or protocol == "file"
end
function dir.deduce_base_dir(url)
-- for extensions like foo.tar.gz, "gz" is stripped first
local known_exts = {}
for _, ext in ipairs{"zip", "git", "tgz", "tar", "gz", "bz2"} do
known_exts[ext] = ""
end
local base = dir.base_name(url)
return (base:gsub("%.([^.]*)$", known_exts):gsub("%.tar", ""))
end
return dir
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