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-- filename : l-file.lua
-- comment : split off from luat-lib
-- author : Hans Hagen, PRAGMA-ADE, Hasselt NL
-- copyright: PRAGMA ADE / ConTeXt Development Team
-- license : see context related readme files
if not versions then versions = { } end versions['l-file'] = 1.001
if not file then file = { } end
function file.removesuffix(filename)
return filename:gsub("%.%a+$", "")
end
function file.addsuffix(filename, suffix)
if not filename:find("%.%a-$") then
return filename .. "." .. suffix
else
return filename
end
end
function file.replacesuffix(filename, suffix)
return (filename:gsub("%.%a+$", "." .. suffix))
end
function file.dirname(name)
return name:match("^(.+)[/\\].-$") or ""
end
function file.basename(name)
return name:match("^.+[/\\](.-)$") or name
end
function file.nameonly(name)
return ((name:match("^.+[/\\](.-)$") or name):gsub("%..*$",""))
end
function file.extname(name)
return name:match("^.+%.([^/\\]-)$") or ""
end
function file.join(...)
local t = { ... }
for i=1,#t do
t[i] = (t[i]:gsub("\\","/")):gsub("/+$","")
end
return table.concat(t,"/")
end
function file.is_writable(name)
local f = io.open(name, 'w')
if f then
f:close()
return true
else
return false
end
end
function file.is_readable(name)
local f = io.open(name,'r')
if f then
f:close()
return true
else
return false
end
end
--~ function file.split_path(str)
--~ if str:find(';') then
--~ return str:splitchr(";")
--~ else
--~ return str:splitchr(io.pathseparator)
--~ end
--~ end
-- todo: lpeg
function file.split_path(str)
local t = { }
str = str:gsub("\\", "/")
str = str:gsub("(%a):([;/])", "%1\001%2")
for name in str:gmatch("([^;:]+)") do
if name ~= "" then
name = name:gsub("\001",":")
t[#t+1] = name
end
end
return t
end
function file.join_path(tab)
return table.concat(tab,io.pathseparator) -- can have trailing //
end
--~ print('test' .. " == " .. file.collapse_path("test"))
--~ print("test/test" .. " == " .. file.collapse_path("test/test"))
--~ print("test/test/test" .. " == " .. file.collapse_path("test/test/test"))
--~ print("test/test" .. " == " .. file.collapse_path("test/../test/test"))
--~ print("test" .. " == " .. file.collapse_path("test/../test"))
--~ print("../test" .. " == " .. file.collapse_path("../test"))
--~ print("../test/" .. " == " .. file.collapse_path("../test/"))
--~ print("a/a" .. " == " .. file.collapse_path("a/b/c/../../a"))
function file.collapse_path(str)
local ok, n = false, 0
while not ok do
ok = true
str, n = str:gsub("[^%./]+/%.%./", function(s)
ok = false
return ""
end)
end
return (str:gsub("/%./","/"))
end
function file.robustname(str)
return (str:gsub("[^%a%d%/%-%.\\]+","-"))
end
file.readdata = io.loaddata
file.savedata = io.savedata
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