/usr/share/texlive/texmf-dist/tex/luatex/lualibs/lualibs-file.lua is in texlive-luatex 2012.20120611-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 | if not modules then modules = { } end modules ['l-file'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- needs a cleanup
file = file or { }
local concat = table.concat
local find, gmatch, match, gsub, sub, char = string.find, string.gmatch, string.match, string.gsub, string.sub, string.char
local lpegmatch = lpeg.match
function file.removesuffix(filename)
return (gsub(filename,"%.[%a%d]+$",""))
end
function file.addsuffix(filename, suffix)
if not suffix or suffix == "" then
return filename
elseif not find(filename,"%.[%a%d]+$") then
return filename .. "." .. suffix
else
return filename
end
end
function file.replacesuffix(filename, suffix)
return (gsub(filename,"%.[%a%d]+$","")) .. "." .. suffix
end
function file.dirname(name,default)
return match(name,"^(.+)[/\\].-$") or (default or "")
end
function file.basename(name)
return match(name,"^.+[/\\](.-)$") or name
end
function file.nameonly(name)
return (gsub(match(name,"^.+[/\\](.-)$") or name,"%..*$",""))
end
function file.extname(name,default)
return match(name,"^.+%.([^/\\]-)$") or default or ""
end
file.suffix = file.extname
--~ function file.join(...)
--~ local pth = concat({...},"/")
--~ pth = gsub(pth,"\\","/")
--~ local a, b = match(pth,"^(.*://)(.*)$")
--~ if a and b then
--~ return a .. gsub(b,"//+","/")
--~ end
--~ a, b = match(pth,"^(//)(.*)$")
--~ if a and b then
--~ return a .. gsub(b,"//+","/")
--~ end
--~ return (gsub(pth,"//+","/"))
--~ end
local trick_1 = char(1)
local trick_2 = "^" .. trick_1 .. "/+"
function file.join(...)
local lst = { ... }
local a, b = lst[1], lst[2]
if a == "" then
lst[1] = trick_1
elseif b and find(a,"^/+$") and find(b,"^/") then
lst[1] = ""
lst[2] = gsub(b,"^/+","")
end
local pth = concat(lst,"/")
pth = gsub(pth,"\\","/")
local a, b = match(pth,"^(.*://)(.*)$")
if a and b then
return a .. gsub(b,"//+","/")
end
a, b = match(pth,"^(//)(.*)$")
if a and b then
return a .. gsub(b,"//+","/")
end
pth = gsub(pth,trick_2,"")
return (gsub(pth,"//+","/"))
end
--~ print(file.join("//","/y"))
--~ print(file.join("/","/y"))
--~ print(file.join("","/y"))
--~ print(file.join("/x/","/y"))
--~ print(file.join("x/","/y"))
--~ print(file.join("http://","/y"))
--~ print(file.join("http://a","/y"))
--~ print(file.join("http:///a","/y"))
--~ print(file.join("//nas-1","/y"))
function file.iswritable(name)
local a = lfs.attributes(name) or lfs.attributes(file.dirname(name,"."))
return a and sub(a.permissions,2,2) == "w"
end
function file.isreadable(name)
local a = lfs.attributes(name)
return a and sub(a.permissions,1,1) == "r"
end
file.is_readable = file.isreadable
file.is_writable = file.iswritable
-- todo: lpeg
--~ function file.split_path(str)
--~ local t = { }
--~ str = gsub(str,"\\", "/")
--~ str = gsub(str,"(%a):([;/])", "%1\001%2")
--~ for name in gmatch(str,"([^;:]+)") do
--~ if name ~= "" then
--~ t[#t+1] = gsub(name,"\001",":")
--~ end
--~ end
--~ return t
--~ end
local checkedsplit = string.checkedsplit
function file.split_path(str,separator)
str = gsub(str,"\\","/")
return checkedsplit(str,separator or io.pathseparator)
end
function file.join_path(tab)
return concat(tab,io.pathseparator) -- can have trailing //
end
-- we can hash them weakly
function file.collapse_path(str)
str = gsub(str,"\\","/")
if find(str,"/") then
str = gsub(str,"^%./",(gsub(lfs.currentdir(),"\\","/")) .. "/") -- ./xx in qualified
str = gsub(str,"/%./","/")
local n, m = 1, 1
while n > 0 or m > 0 do
str, n = gsub(str,"[^/%.]+/%.%.$","")
str, m = gsub(str,"[^/%.]+/%.%./","")
end
str = gsub(str,"([^/])/$","%1")
-- str = gsub(str,"^%./","") -- ./xx in qualified
str = gsub(str,"/%.$","")
end
if str == "" then str = "." end
return str
end
--~ print(file.collapse_path("/a"))
--~ print(file.collapse_path("a/./b/.."))
--~ print(file.collapse_path("a/aa/../b/bb"))
--~ print(file.collapse_path("a/../.."))
--~ print(file.collapse_path("a/.././././b/.."))
--~ print(file.collapse_path("a/./././b/.."))
--~ print(file.collapse_path("a/b/c/../.."))
function file.robustname(str)
return (gsub(str,"[^%a%d%/%-%.\\]+","-"))
end
file.readdata = io.loaddata
file.savedata = io.savedata
function file.copy(oldname,newname)
file.savedata(newname,io.loaddata(oldname))
end
-- lpeg variants, slightly faster, not always
--~ local period = lpeg.P(".")
--~ local slashes = lpeg.S("\\/")
--~ local noperiod = 1-period
--~ local noslashes = 1-slashes
--~ local name = noperiod^1
--~ local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * lpeg.C(noperiod^1) * -1
--~ function file.extname(name)
--~ return lpegmatch(pattern,name) or ""
--~ end
--~ local pattern = lpeg.Cs(((period * noperiod^1 * -1)/"" + 1)^1)
--~ function file.removesuffix(name)
--~ return lpegmatch(pattern,name)
--~ end
--~ local pattern = (noslashes^0 * slashes)^1 * lpeg.C(noslashes^1) * -1
--~ function file.basename(name)
--~ return lpegmatch(pattern,name) or name
--~ end
--~ local pattern = (noslashes^0 * slashes)^1 * lpeg.Cp() * noslashes^1 * -1
--~ function file.dirname(name)
--~ local p = lpegmatch(pattern,name)
--~ if p then
--~ return sub(name,1,p-2)
--~ else
--~ return ""
--~ end
--~ end
--~ local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * lpeg.Cp() * noperiod^1 * -1
--~ function file.addsuffix(name, suffix)
--~ local p = lpegmatch(pattern,name)
--~ if p then
--~ return name
--~ else
--~ return name .. "." .. suffix
--~ end
--~ end
--~ local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * lpeg.Cp() * noperiod^1 * -1
--~ function file.replacesuffix(name,suffix)
--~ local p = lpegmatch(pattern,name)
--~ if p then
--~ return sub(name,1,p-2) .. "." .. suffix
--~ else
--~ return name .. "." .. suffix
--~ end
--~ end
--~ local pattern = (noslashes^0 * slashes)^0 * lpeg.Cp() * ((noperiod^1 * period)^1 * lpeg.Cp() + lpeg.P(true)) * noperiod^1 * -1
--~ function file.nameonly(name)
--~ local a, b = lpegmatch(pattern,name)
--~ if b then
--~ return sub(name,a,b-2)
--~ elseif a then
--~ return sub(name,a)
--~ else
--~ return name
--~ end
--~ end
--~ local test = file.extname
--~ local test = file.basename
--~ local test = file.dirname
--~ local test = file.addsuffix
--~ local test = file.replacesuffix
--~ local test = file.nameonly
--~ print(1,test("./a/b/c/abd.def.xxx","!!!"))
--~ print(2,test("./../b/c/abd.def.xxx","!!!"))
--~ print(3,test("a/b/c/abd.def.xxx","!!!"))
--~ print(4,test("a/b/c/def.xxx","!!!"))
--~ print(5,test("a/b/c/def","!!!"))
--~ print(6,test("def","!!!"))
--~ print(7,test("def.xxx","!!!"))
--~ local tim = os.clock() for i=1,250000 do local ext = test("abd.def.xxx","!!!") end print(os.clock()-tim)
-- also rewrite previous
local letter = lpeg.R("az","AZ") + lpeg.S("_-+")
local separator = lpeg.P("://")
local qualified = lpeg.P(".")^0 * lpeg.P("/") + letter*lpeg.P(":") + letter^1*separator + letter^1 * lpeg.P("/")
local rootbased = lpeg.P("/") + letter*lpeg.P(":")
-- ./name ../name /name c: :// name/name
function file.is_qualified_path(filename)
return lpegmatch(qualified,filename) ~= nil
end
function file.is_rootbased_path(filename)
return lpegmatch(rootbased,filename) ~= nil
end
local slash = lpeg.S("\\/")
local period = lpeg.P(".")
local drive = lpeg.C(lpeg.R("az","AZ")) * lpeg.P(":")
local path = lpeg.C(((1-slash)^0 * slash)^0)
local suffix = period * lpeg.C(lpeg.P(1-period)^0 * lpeg.P(-1))
local base = lpeg.C((1-suffix)^0)
local pattern = (drive + lpeg.Cc("")) * (path + lpeg.Cc("")) * (base + lpeg.Cc("")) * (suffix + lpeg.Cc(""))
function file.splitname(str) -- returns drive, path, base, suffix
return lpegmatch(pattern,str)
end
-- function test(t) for k, v in next, t do print(v, "=>", file.splitname(v)) end end
--
-- test { "c:", "c:/aa", "c:/aa/bb", "c:/aa/bb/cc", "c:/aa/bb/cc.dd", "c:/aa/bb/cc.dd.ee" }
-- test { "c:", "c:aa", "c:aa/bb", "c:aa/bb/cc", "c:aa/bb/cc.dd", "c:aa/bb/cc.dd.ee" }
-- test { "/aa", "/aa/bb", "/aa/bb/cc", "/aa/bb/cc.dd", "/aa/bb/cc.dd.ee" }
-- test { "aa", "aa/bb", "aa/bb/cc", "aa/bb/cc.dd", "aa/bb/cc.dd.ee" }
--~ -- todo:
--~
--~ if os.type == "windows" then
--~ local currentdir = lfs.currentdir
--~ function lfs.currentdir()
--~ return (gsub(currentdir(),"\\","/"))
--~ end
--~ end
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