summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/doc/support/cluttex/src/texrunner/pathutil_windows.lua
blob: 8b15efd0e4d412fee98ea4ca796a035aae7ebc49 (plain)
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
--[[
  Copyright 2016 ARATA Mizuki

  This file is part of ClutTeX.

  ClutTeX is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  ClutTeX is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with ClutTeX.  If not, see <http://www.gnu.org/licenses/>.
]]

-- pathutil module

local assert = assert
local select = select
local string = string
local string_find = string.find
local string_sub = string.sub
local string_match = string.match
local string_gsub = string.gsub
local filesys = require "lfs"

local function basename(path)
  local i = 0
  while true do
    local j = string_find(path, "[\\/]", i + 1)
    if j == nil then
      return string_sub(path, i + 1)
    elseif j == #path then
      return string_sub(path, i + 1, -2)
    end
    i = j
  end
end

-- TEST CODE
assert(basename("/path/to/file") == "file")
assert(basename("/path/to/directory/") == "directory")
assert(basename([[c:\path\to/directory\]]) == "directory")
assert(basename("/file") == "file")
assert(basename("file") == "file")
-- END TEST CODE

local function dirname(path)
  local i = 0
  while true do
    local j = string_find(path, "[\\/]", i + 1)
    if j == nil then
      if i == 0 then
        -- No directory portion
        return "."
      elseif i == 1 then
        -- Root
        return string_sub(path, 1, 1)
      else
        -- Directory portion without trailing slash
        return string_sub(path, 1, i - 1)
      end
    end
    i = j
  end
end

-- TEST CODE
assert(dirname("/path/to/file") == "/path/to")
assert(dirname("/path/to/directory/") == "/path/to/directory")
assert(dirname([[c:/path\to/file]]) == [[c:/path\to]])
assert(dirname("/file") == "/")
assert(dirname("file") == ".")
-- END TEST CODE

local function parentdir(path)
  local i = 0
  while true do
    local j = string_find(path, "[\\/]", i + 1)
    if j == nil then
      if i == 0 then
        -- No directory portion
        return "."
      elseif i == 1 then
        -- Root
        return string_sub(path, 1, 1)
      else
        -- Directory portion without trailing slash
        return string_sub(path, 1, i - 1)
      end
    elseif j == #path then
      -- Directory portion without trailing slash
      return string_sub(path, 1, i - 1)
    end
    i = j
  end
end

-- TEST CODE
assert(parentdir("/path/to/file") == "/path/to")
assert(parentdir("/path/to/directory/") == "/path/to")
assert(parentdir("/file") == "/")
assert(parentdir("file") == ".")
-- END TEST CODE

local function trimext(path)
  return (string_gsub(path, "%.[^\\/%.]*$", ""))
end

-- TEST CODE
assert(trimext("/path/to/file.ext") == "/path/to/file")
assert(trimext("/path/t.o/file") == "/path/t.o/file")
assert(trimext([[c:/path/t.o\file]]) == [[c:/path/t.o\file]])
assert(trimext("file.ext") == "file")
assert(trimext("file.e.xt") == "file.e")
assert(trimext("file.ext.") == "file.ext")
assert(trimext("file") == "file")
-- END TEST CODE

local function ext(path)
  return string_match(path, "%.([^\\/%.]*)$") or ""
end

-- TEST CODE
assert(ext("/path/to/file.ext") == "ext")
assert(ext("/path/t.o/file") == "")
assert(ext([[c:/path/t.o\file]]) == "")
assert(ext("file.ext") == "ext")
assert(ext("file.e.xt") == "xt")
assert(ext("file.ext.") == "")
assert(ext("file") == "")
-- END TEST CODE

local function replaceext(path, newext)
  local newpath, n = string_gsub(path, "%.([^\\/%.]*)$", function() return "." .. newext end)
  if n == 0 then
    return newpath .. "." .. newext
  else
    return newpath
  end
end

-- TEST CODE
assert(replaceext("/path/to/file.ext", "tor") == "/path/to/file.tor")
assert(replaceext("/path/t.o/file", "tor") == "/path/t.o/file.tor")
assert(replaceext([[c:/path/t.o\file]], "tor") == [[c:/path/t.o\file.tor]])
assert(replaceext("file.ext", "tor") == "file.tor")
assert(replaceext("file.e.xt", "tor") == "file.e.tor")
assert(replaceext("file.ext.", "tor") == "file.ext.tor")
assert(replaceext("file", "tor") == "file.tor")
-- END TEST CODE

local function joinpath2(x, y)
  local xd = x
  local last = string_sub(x, -1)
  if last ~= "/" and last ~= "\\" then
    xd = x .. "\\"
  end
  if y == "." then
    return xd
  elseif y == ".." then
    return dirname(x)
  else
    if string_match(y, "^%.[\\/]") then
      return xd .. string_sub(y, 3)
    else
      return xd .. y
    end
  end
end

local function joinpath(...)
  local n = select("#", ...)
  if n == 2 then
    return joinpath2(...)
  elseif n == 0 then
    return "."
  elseif n == 1 then
    return ...
  else
    return joinpath(joinpath2(...), select(3, ...))
  end
end

-- TEST CODE
assert(joinpath("/path/", "to", "somewhere") == [[/path/to\somewhere]])
assert(joinpath("/path/", "to", "somewhere", "..") == [[/path/to]])
assert(joinpath("/path/", "to", "somewhere", "..", "elsewhere") == [[/path/to\elsewhere]])
assert(joinpath("/path/", "to", "./somewhere.txt") == "/path/to/somewhere.txt")
-- END TEST CODE

-- https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx
local function isabspath(path)
  local init = string_sub(path, 1, 1)
  return init == "\\" or init == "/" or string_match(path, "^%a:[/\\]")
end

local function abspath(path, cwd)
  if isabspath(path) then
    -- absolute path
    return path
  else
    -- TODO: relative path with a drive letter is not supported
    cwd = cwd or filesys.currentdir()
    return joinpath2(cwd, path)
  end
end

return {
  basename = basename,
  dirname = dirname,
  parentdir = parentdir,
  trimext = trimext,
  ext = ext,
  replaceext = replaceext,
  join = joinpath,
  abspath = abspath,
}