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--[[
module for generic filesystem funcs
Copyright (c) Natanael Copa 2006
MM edited to use "posix"
]]--
module (..., package.seeall)
require ("posix")
-- generic wrapper funcs
function is_dir ( pathstr )
return posix.stat ( pathstr, "type" ) == "directory"
end
function is_file ( pathstr )
return posix.stat ( pathstr, "type" ) == "regular"
end
function is_link ( pathstr )
return posix.stat ( pathstr, "type" ) == "link"
end
-- Returns the contents of a file as a string
function read_file ( path )
local file = io.open(path)
if ( file ) then
local f = file:read("*a")
file:close()
return f
else
return nil
end
end
-- Returns an array with the contents of a file,
-- or nil and the error message
function read_file_as_array ( path )
local file, error = io.open(path)
if ( file == nil ) then
return nil, error
end
local f = {}
for line in file:lines() do
table.insert ( f , line )
--sometimes you will see it like f[#f+1] = line
end
file:close()
return f
end
-- find all return characters and removes them, may get this from a browser
-- that is why didn't do file specific
function dostounix ( a )
local data = string.gsub(a, "\r", "")
return data
end
-- read a file without blank lines and commented lines
function remove_blanks_comments ( path )
local f = io.open(path)
local lines = {}
for line in f:lines() do
local c = string.match(line, "^$") or string.match(line, "^%#")
if c == nil then lines[#lines + 1] = line end
end
-- returns a table to iterate over without the blank or commented lines
return lines
end
--will search and replace through the whole of the file and return a table
function search_replace (path , find, replace)
local f = fs.read_file_as_array(path)
local lines = {}
for a,b in ipairs(f) do
local c = string.gsub(b, find, replace)
lines[#lines + 1] = c end
return lines
end
--will interate over a ipairs(table) and make it into a string to be used by write_file
function ipairs_string ( t )
for a,b in ipairs(t) do
if a == 1 then
c = b
else
c = c .. "\n" .. b
end
end
--add a friendly \n for EOF
c = c .. "\n"
return c
end
-- write a string to a file !! MM-will replace file contents
function write_file ( path, str )
local file = io.open(path, "w")
if ( file ) then
file:write(str)
file:close()
end
end
-- this could do more than a line. This will append
-- fs.write_line_file ("filename", "Line1 \nLines2 \nLines3")
function write_line_file ( path, str )
local file = io.open(path)
if ( file) then
local c = file:read("*a")
file:close()
local d = (c .. "\n" .. str .. "\n")
-- include a friendly newline for EOF
fs.write_file(path,d)
end
end
-- iterator function for finding dir entries matching filespec (what)
-- starting at where, or currentdir if not specified.
-- Finds regexes, not fileglobs
function find ( what, where )
-- returns an array of files under "where" that match what "f"
local function find_files_as_array ( f, where, t )
where = where or posix.getcwd()
f = f or ".*"
t = t or {}
for d in posix.files ( where ) do
if fs.is_dir ( where .. "/" .. d ) and (d ~= ".") and ( d ~= "..") then
find_files_as_array (f, where .. "/" .. d, t )
end
if (string.match (d, "^" .. f .. "$" )) then
table.insert (t, ( string.gsub ( where .. "/" .. d, "/+", "/" ) ) )
end
end
return (t)
end
-- This is the iterator
local t = find_files_as_array ( what, where )
local idx = 0
return function ()
idx = idx + 1
return t[idx]
end
end
-- This code comes from http://lua-users.org/wiki/SplitJoin
-- -- example: strjoin(", ", {"Anna", "Bob", "Charlie", "Dolores"})
function table_to_string (delimiter, list)
local len = getn(list)
if len == 0 then
return ""
end
local string = list[1]
for i = 2, len do
string = string .. delimiter .. list[i]
end
return string
end
-- This code comes from http://lua-users.org/wiki/SplitJoin
-- example: strsplit(",%s*", "Anna, Bob, Charlie,Dolores")
function string_to_table (delimiter, text)
local list = {}
local pos = 1
-- this would result in endless loops
if string.find("", delimiter, 1) then
error("delimiter matches empty string!")
end
while 1 do
local first, last = string.find(text, delimiter, pos)
if first then -- found?
table.insert(list, string.sub(text, pos, first-1))
pos = last+1
else
table.insert(list, string.sub(text, pos))
break
end
end
return list
end
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