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-rw-r--r--tex/context/base/l-file.lua192
1 files changed, 149 insertions, 43 deletions
diff --git a/tex/context/base/l-file.lua b/tex/context/base/l-file.lua
index 2bfc07090..b528d9a7d 100644
--- a/tex/context/base/l-file.lua
+++ b/tex/context/base/l-file.lua
@@ -10,45 +10,88 @@ if not modules then modules = { } end modules ['l-file'] = {
file = file or { }
-local concat = table.concat
+local insert, concat = table.insert, 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
+local getcurrentdir = lfs.currentdir
-function file.removesuffix(filename)
- return (gsub(filename,"%.[%a%d]+$",""))
+local function dirname(name,default)
+ return match(name,"^(.+)[/\\].-$") or (default or "")
end
-function file.addsuffix(filename, suffix)
- if not suffix or suffix == "" then
- return filename
- elseif not find(filename,"%.[%a%d]+$") then
- return filename .. "." .. suffix
- else
- return filename
- end
+local function basename(name)
+ return match(name,"^.+[/\\](.-)$") or name
end
-function file.replacesuffix(filename, suffix)
- return (gsub(filename,"%.[%a%d]+$","")) .. "." .. suffix
+local function nameonly(name)
+ return (gsub(match(name,"^.+[/\\](.-)$") or name,"%..*$",""))
end
-function file.dirname(name,default)
- return match(name,"^(.+)[/\\].-$") or (default or "")
+local function extname(name,default)
+ return match(name,"^.+%.([^/\\]-)$") or default or ""
end
-function file.basename(name)
- return match(name,"^.+[/\\](.-)$") or name
+local function splitname(name)
+ local n, s = match(name,"^(.+)%.([^/\\]-)$")
+ return n or name, s or ""
end
-function file.nameonly(name)
- return (gsub(match(name,"^.+[/\\](.-)$") or name,"%..*$",""))
+file.basename = basename
+file.dirname = dirname
+file.nameonly = nameonly
+file.extname = extname
+file.suffix = extname
+
+function file.removesuffix(filename)
+ return (gsub(filename,"%.[%a%d]+$",""))
end
-function file.extname(name,default)
- return match(name,"^.+%.([^/\\]-)$") or default or ""
+function file.addsuffix(filename, suffix, criterium)
+ if not suffix or suffix == "" then
+ return filename
+ elseif criterium == true then
+ return filename .. "." .. suffix
+ elseif not criterium then
+ local n, s = splitname(filename)
+ if not s or s == "" then
+ return filename .. "." .. suffix
+ else
+ return filename
+ end
+ else
+ local n, s = splitname(filename)
+ if s and s ~= "" then
+ local t = type(criterium)
+ if t == "table" then
+ -- keep if in criterium
+ for i=1,#criterium do
+ if s == criterium[i] then
+ return filename
+ end
+ end
+ elseif t == "string" then
+ -- keep if criterium
+ if s == criterium then
+ return filename
+ end
+ end
+ end
+ return n .. "." .. suffix
+ end
end
-file.suffix = file.extname
+--~ print("1 " .. file.addsuffix("name","new") .. " -> name.new")
+--~ print("2 " .. file.addsuffix("name.old","new") .. " -> name.old")
+--~ print("3 " .. file.addsuffix("name.old","new",true) .. " -> name.old.new")
+--~ print("4 " .. file.addsuffix("name.old","new","new") .. " -> name.new")
+--~ print("5 " .. file.addsuffix("name.old","new","old") .. " -> name.old")
+--~ print("6 " .. file.addsuffix("name.old","new","foo") .. " -> name.new")
+--~ print("7 " .. file.addsuffix("name.old","new",{"foo","bar"}) .. " -> name.new")
+--~ print("8 " .. file.addsuffix("name.old","new",{"old","bar"}) .. " -> name.old")
+
+function file.replacesuffix(filename, suffix)
+ return (gsub(filename,"%.[%a%d]+$","")) .. "." .. suffix
+end
--~ function file.join(...)
--~ local pth = concat({...},"/")
@@ -101,7 +144,7 @@ end
--~ print(file.join("//nas-1","/y"))
function file.iswritable(name)
- local a = lfs.attributes(name) or lfs.attributes(file.dirname(name,"."))
+ local a = lfs.attributes(name) or lfs.attributes(dirname(name,"."))
return a and sub(a.permissions,2,2) == "w"
end
@@ -140,31 +183,94 @@ end
-- we can hash them weakly
-function file.collapse_path(str)
+--~ function file.old_collapse_path(str) -- fails on b.c/..
+--~ 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,"/%.$","")
+--~ end
+--~ if str == "" then str = "." end
+--~ return str
+--~ end
+--~
+--~ The previous one fails on "a.b/c" so Taco came up with a split based
+--~ variant. After some skyping we got it sort of compatible with the old
+--~ one. After that the anchoring to currentdir was added in a better way.
+--~ Of course there are some optimizations too. Finally we had to deal with
+--~ windows drive prefixes and thinsg like sys://.
+
+function file.collapse_path(str,anchor)
+ if anchor and not find(str,"^/") and not find(str,"^%a:") then
+ str = getcurrentdir() .. "/" .. str
+ end
+ if str == "" or str =="." then
+ return "."
+ elseif find(str,"^%.%.") then
+ str = gsub(str,"\\","/")
+ return str
+ elseif not find(str,"%.") then
+ str = gsub(str,"\\","/")
+ return str
+ end
str = gsub(str,"\\","/")
- if find(str,"/") then
- str = gsub(str,"^%./",(gsub(lfs.currentdir(),"\\","/")) .. "/") -- ./xx in qualified
- str = gsub(str,"/%./","/")
- local n, m = 1, 1
- while n > 0 or m > 0 do
- str, n = gsub(str,"[^/%.]+/%.%.$","")
- str, m = gsub(str,"[^/%.]+/%.%./","")
+ local starter, rest = match(str,"^(%a+:/*)(.-)$")
+ if starter then
+ str = rest
+ end
+ local oldelements = checkedsplit(str,"/")
+ local newelements = { }
+ local i = #oldelements
+ while i > 0 do
+ local element = oldelements[i]
+ if element == '.' then
+ -- do nothing
+ elseif element == '..' then
+ local n = i -1
+ while n > 0 do
+ local element = oldelements[n]
+ if element ~= '..' and element ~= '.' then
+ oldelements[n] = '.'
+ break
+ else
+ n = n - 1
+ end
+ end
+ if n < 1 then
+ insert(newelements,1,'..')
+ end
+ elseif element ~= "" then
+ insert(newelements,1,element)
end
- str = gsub(str,"([^/])/$","%1")
- -- str = gsub(str,"^%./","") -- ./xx in qualified
- str = gsub(str,"/%.$","")
+ i = i - 1
+ end
+ if #newelements == 0 then
+ return starter or "."
+ elseif starter then
+ return starter .. concat(newelements, '/')
+ elseif find(str,"^/") then
+ return "/" .. concat(newelements,'/')
+ else
+ return concat(newelements, '/')
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/../.."))
+--~ local function test(str)
+--~ print(string.format("%-20s %-15s %-15s",str,file.collapse_path(str),file.collapse_path(str,true)))
+--~ end
+--~ test("a/b.c/d") test("b.c/d") test("b.c/..")
+--~ test("/") test("c:/..") test("sys://..")
+--~ test("") test("./") test(".") test("..") test("./..") test("../..")
+--~ test("a") test("./a") test("/a") test("a/../..")
+--~ test("a/./b/..") test("a/aa/../b/bb") test("a/.././././b/..") test("a/./././b/..")
+--~ test("a/b/c/../..") test("./a/b/c/../..") test("a/b/c/../..")
function file.robustname(str)
return (gsub(str,"[^%a%d%/%-%.\\]+","-"))
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-25 07:18:15 +0000