1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
-- Some file utilities for searching for files recursively and using package.nomsupath
lpeg = require 'lpeg'
re = require 're'
files = {}
_FILE_CACHE = {}
-- Create a fake file and put it in the cache
files.spoof = (filename, contents)->
_FILE_CACHE[filename] = contents
-- Read a file's contents (searching first locally, then in the nomsupath)
files.read = (filename)->
if file_contents = _FILE_CACHE[filename]
return file_contents
if filename == 'stdin'
contents = io.read('*a')
_FILE_CACHE['stdin'] = contents
return contents
file = io.open(filename)
if package.nomsupath and not file
for nomsupath in package.nomsupath\gmatch("[^;]+")
file = io.open(nomsupath.."/"..filename)
break if file
return nil unless file
contents = file\read("*a")
file\close!
_FILE_CACHE[filename] = contents
return contents
-- `walk` returns an iterator over all files matching a path.
{:match, :gsub} = string
-- TODO: improve sanitization
sanitize = (path)->
path = gsub(path,"\\","\\\\")
path = gsub(path,"`","")
path = gsub(path,'"','\\"')
path = gsub(path,"$","")
return path
files.exists = (path)->
return true unless io.popen("ls #{sanitize(path)}")\close!
if package.nomsupath
for nomsupath in package.nomsupath\gmatch("[^;]+")
return true unless io.popen("ls #{nomsupath}/#{sanitize(path)}")\close!
return false
_browse_cache = {}
browse = (path)->
unless _browse_cache[path]
f = io.popen('find -L "'..package.nomsupath..'/'..path..'" -not -path "*/\\.*" -type f -name "*.nom"')
_files = {line for line in f\lines!}
_files = false unless f\close!
_browse_cache[path] = _files
return _browse_cache[path]
ok, lfs = pcall(require, "lfs")
if ok
raw_file_exists = (filename)->
mode = lfs.attributes(filename, 'mode')
return if mode == 'file' or mode == 'directory' or mode == 'link' then true else false
files.exists = (path)->
return true if path == 'stdin' or raw_file_exists(path)
if package.nomsupath
for nomsupath in package.nomsupath\gmatch("[^;]+")
return true if raw_file_exists(nomsupath.."/"..path)
return false
export browse
browse = (filename)->
unless _browse_cache[filename]
_browse_cache[filename] = false
file_type, err = lfs.attributes(filename, 'mode')
if file_type == 'file'
if match(filename, "%.nom$") or match(filename, "%.lua$")
_browse_cache[filename] = {filename}
elseif file_type == 'char device'
_browse_cache[filename] = {filename}
elseif file_type == 'directory' or file_type == 'link'
_files = {}
for subfile in lfs.dir(filename)
unless subfile == "." or subfile == ".."
for f in *(browse(filename.."/"..subfile) or {})
_files[#_files+1] = f
_browse_cache[filename] = _files
return _browse_cache[filename]
else
if io.popen('find . -maxdepth 0')\close!
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: http://keplerproject.github.io/luafilesystem/ or `luarocks install luafilesystem`)", 0
files.walk = (path, flush_cache=false)->
if flush_cache
export _browse_cache
_browse_cache = {}
_files = browse(path)
if package.nomsupath and not _files
for nomsupath in package.nomsupath\gmatch("[^;]+")
if _files = browse(nomsupath.."/"..path) then break
iter = (_files, i)->
return unless _files
i += 1
if f = _files[i]
return i, f
return iter, _files, 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
log = {}
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)
return str\sub(line_starts[line_no] or 1, (line_starts[line_no+1] or 1) - 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
|
