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-- Some file utilities for searching for files recursively and using package.nomsupath
lpeg = require 'lpeg'
re = require 're'
Files = {}
run_cmd = (cmd)->
f = io.popen(cmd)
lines = [line for line in f\lines!]
return nil unless f\close!
return lines
_SPOOFED_FILES = {}
_BROWSE_CACHE = {}
-- Create a fake file and put it in the cache
_anon_number = 0
Files.spoof = (filename, contents)->
if not contents
filename, contents = "<anonymous file ##{_anon_number}>", filename
_anon_number += 1
_SPOOFED_FILES[filename] = contents
return filename
-- Read a file's contents
Files.read = (filename)->
if contents = _SPOOFED_FILES[filename]
return contents
if filename == 'stdin' or filename == '-'
contents = io.read('*a')
Files.spoof('stdin', contents)
Files.spoof('-', contents)
return contents
file = io.open(filename)
return nil unless file
contents = file\read("*a")
file\close!
return contents or nil
{:match, :gsub} = string
-- TODO: improve sanitization
sanitize = (path)->
path = gsub(path,"\\","\\\\")
path = gsub(path,"`","")
path = gsub(path,'"','\\"')
path = gsub(path,"$","")
return path
Files.exists = (path)->
return true if _SPOOFED_FILES[path]
return true if path == 'stdin' or path == '-'
return true if run_cmd("ls #{sanitize(path)}")
return false
Files.list = (path)->
unless _BROWSE_CACHE[path]
local files
_BROWSE_CACHE[path] = if _SPOOFED_FILES[path] or path == 'stdin' or path == '-'
{path}
else run_cmd('find -L "'..path..'" -not -path "*/\\.*" -type f 2>/dev/null') or false
return _BROWSE_CACHE[path]
ok, lfs = pcall(require, "lfs")
if ok
raw_file_exists = (filename)->
mode = lfs.attributes(filename, 'mode')
return if mode == 'file' or mode == 'directory' or mode == 'link' then true else false
Files.exists = (path)->
return true if _SPOOFED_FILES[path]
return true if path == 'stdin' or path == '-' or raw_file_exists(path)
return false
Files.list = (path)->
unless _BROWSE_CACHE[path]
_BROWSE_CACHE[path] = if _SPOOFED_FILES[path] or path == 'stdin' or path == '-'
{path}
else
file_type, err = lfs.attributes(path, 'mode')
switch file_type
when "file", "char device"
{path}
when "directory", "link"
files = {}
for subfile in lfs.dir(path)
continue if subfile == "." or subfile == ".."
for f in *(Files.list(path.."/"..subfile) or {})
files[#files+1] = f
files
else false
-- Filter out any "./" prefix to standardize
if _BROWSE_CACHE[path]
for i,f in ipairs(_BROWSE_CACHE[path])
if f\match("^%./") then _BROWSE_CACHE[path][i] = f\sub(3)
return _BROWSE_CACHE[path]
else
unless run_cmd('find . -maxdepth 0 2>/dev/null')
url = if jit
'https://github.com/spacewander/luafilesystem'
else 'https://github.com/keplerproject/luafilesystem'
error "Could not find 'luafilesystem' module and couldn't run system command `find` (this might happen on Windows). Please install `luafilesystem` (which can be found at: #{url} or `luarocks install luafilesystem`)", 0
line_counter = re.compile([[
lines <- {| line (%nl line)* |}
line <- {} (!%nl .)*
]], nl:lpeg.P("\r")^-1 * lpeg.P("\n"))
-- LINE_STARTS is a mapping from strings to a table that maps line number to character positions
_LINE_STARTS = {}
Files.get_line_starts = (str)->
if type(str) != 'string'
str = tostring(str)
if starts = _LINE_STARTS[str]
return starts
line_starts = line_counter\match(str)
_LINE_STARTS[str] = line_starts
return line_starts
Files.get_line_number = (str, pos)->
line_starts = Files.get_line_starts(str)
-- Binary search for line number of position
lo, hi = 1, #line_starts
while lo <= hi
mid = math.floor((lo+hi)/2)
if line_starts[mid] > pos
hi = mid-1
else lo = mid+1
return hi
Files.get_line = (str, line_no)->
line_starts = Files.get_line_starts(str)
start = line_starts[line_no]
return unless start
stop = line_starts[line_no+1]
return unless stop
return (str\sub(start, stop - 2))
get_lines = re.compile([[
lines <- {| line (%nl line)* |}
line <- {[^%nl]*}
]], nl:lpeg.P("\r")^-1 * lpeg.P("\n"))
Files.get_lines = (str)-> get_lines\match(str)
return Files
|
