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-rw-r--r--tex/context/base/mkiv/file-mod.lua242
1 files changed, 242 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/file-mod.lua b/tex/context/base/mkiv/file-mod.lua
new file mode 100644
index 000000000..7f3763c5d
--- /dev/null
+++ b/tex/context/base/mkiv/file-mod.lua
@@ -0,0 +1,242 @@
+if not modules then modules = { } end modules ['file-mod'] = {
+ version = 1.001,
+ comment = "companion to file-mod.mkvi",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+-- This module will be redone! For instance, the prefixes will move to data-*
+-- as they arr sort of generic along with home:// etc/.
+
+-- context is not defined yet! todo! (we need to load tupp-fil after cld)
+-- todo: move startreadingfile to lua and push regime there
+
+--[[ldx--
+<p>It's more convenient to manipulate filenames (paths) in
+<l n='lua'/> than in <l n='tex'/>. These methods have counterparts
+at the <l n='tex'/> side.</p>
+--ldx]]--
+
+local format, find, concat, tonumber = string.format, string.find, table.concat, tonumber
+
+local trace_modules = false trackers .register("modules.loading", function(v) trace_modules = v end)
+local permit_unprefixed = false directives.register("modules.permitunprefixed", function(v) permit_unprefixed = v end)
+
+local report_modules = logs.reporter("resolvers","modules")
+
+local commands = commands
+local context = context
+local implement = interfaces.implement
+
+local findbyscheme = resolvers.finders.byscheme -- use different one
+local iterator = utilities.parsers.iterator
+
+-- modules can have a specific suffix or can specify one
+
+local prefixes = {
+ "m", -- module, extends functionality
+ "p", -- private code
+ "s", -- styles
+ "x", -- xml specific modules
+ -- "v", -- an old internal one for examples
+ "t", -- third party extensions
+}
+
+-- the order might change and how about cld
+
+local suffixes = {
+ "mkvi", -- proprocessed mkiv files
+ "mkiv", -- mkiv files
+ "tex", -- normally source code files
+ "cld", -- context lua documents (often stand alone)
+ "lua", -- lua files
+}
+
+local modstatus = { }
+
+local function usemodule(name,hasscheme)
+ local foundname
+ if hasscheme then
+ -- no auto suffix as http will return a home page or error page
+ -- so we only add one if missing
+ local fullname = file.addsuffix(name,"tex")
+ if trace_modules then
+ report_modules("checking url %a",fullname)
+ end
+ foundname = resolvers.findtexfile(fullname) or ""
+ elseif file.suffix(name) ~= "" then
+ if trace_modules then
+ report_modules("checking file %a",name)
+ end
+ foundname = findbyscheme("any",name) or ""
+ else
+ for i=1,#suffixes do
+ local fullname = file.addsuffix(name,suffixes[i])
+ if trace_modules then
+ report_modules("checking file %a",fullname)
+ end
+ foundname = findbyscheme("any",fullname) or ""
+ if foundname ~= "" then
+ break
+ end
+ end
+ end
+ if foundname ~= "" then
+ if trace_modules then
+ report_modules("loading file %a",foundname)
+ end
+ context.startreadingfile()
+ resolvers.jobs.usefile(foundname,true) -- once, notext
+ -- context.input(foundname)
+ context.stopreadingfile()
+ return true
+ else
+ return false
+ end
+end
+
+function environment.usemodules(prefix,askedname,truename)
+ local truename = truename or environment.truefilename(askedname)
+ local hasprefix = prefix and prefix ~= ""
+ local hashname = ((hasprefix and prefix) or "*") .. "-" .. truename
+ local status = modstatus[hashname] or false -- yet unset
+ if status == 0 then
+ -- not found
+ elseif status == 1 then
+ status = status + 1
+ else
+ if trace_modules then
+ report_modules("locating, prefix %a, askedname %a, truename %a",prefix,askedname,truename)
+ end
+ local hasscheme = url.hasscheme(truename)
+ if hasscheme then
+ -- no prefix and suffix done
+ if usemodule(truename,true) then
+ status = 1
+ else
+ status = 0
+ end
+ elseif hasprefix then
+ if usemodule(prefix .. "-" .. truename) then
+ status = 1
+ else
+ status = 0
+ end
+ else
+ for i=1,#prefixes do
+ -- todo: reconstruct name i.e. basename
+ local thename = prefixes[i] .. "-" .. truename
+ if usemodule(thename) then
+ status = 1
+ break
+ end
+ end
+ if status then
+ -- ok, don't change
+ elseif find(truename,"%-") and usemodule(truename) then
+ -- assume a user namespace
+ report_modules("using user prefixed file %a",truename)
+ status = 1
+ elseif permit_unprefixed and usemodule(truename) then
+ report_modules("using unprefixed file %a",truename)
+ status = 1
+ else
+ status = 0
+ end
+ end
+ end
+ if status == 0 then
+ report_modules("%a is not found",askedname)
+ elseif status == 1 then
+ report_modules("%a is loaded",trace_modules and truename or askedname)
+ else
+ report_modules("%a is already loaded",trace_modules and truename or askedname)
+ end
+ modstatus[hashname] = status
+end
+
+statistics.register("loaded tex modules", function()
+ if next(modstatus) then
+ local t, f, nt, nf = { }, { }, 0, 0
+ for k, v in table.sortedhash(modstatus) do
+ k = file.basename(k)
+ if v == 0 then
+ nf = nf + 1
+ f[nf] = k
+ else
+ nt = nt + 1
+ t[nt] = k
+ end
+ end
+ if nf == 0 then
+ return format("%s requested, all found (%s)",nt,concat(t," "))
+ elseif nt == 0 then
+ return format("%s requested, all missing (%s)",nf,concat(f," "))
+ else
+ return format("%s requested, %s found (%s), %s missing (%s)",nt+nf,nt,concat(t," "),nf,concat(f," "))
+ end
+ else
+ return nil
+ end
+end)
+
+-- moved from syst-lua.lua:
+
+local lpegmatch = lpeg.match
+local splitter = lpeg.tsplitter(lpeg.S(". "),tonumber)
+
+function environment.comparedversion(one,two) -- one >= two
+ if not two or two == "" then
+ one, two = environment.version, one
+ elseif one == "" then
+ one = environment.version
+ end
+ one = lpegmatch(splitter,one)
+ two = lpegmatch(splitter,two)
+ one = (one[1] or 0) * 10000 + (one[2] or 0) * 100 + (one[3] or 0)
+ two = (two[1] or 0) * 10000 + (two[2] or 0) * 100 + (two[3] or 0)
+ if one < two then
+ return -1
+ elseif one > two then
+ return 1
+ else
+ return 0
+ end
+end
+
+environment.comparedversion = comparedversion
+
+
+function environment.useluamodule(list)
+ for filename in iterator(list) do
+ environment.loadluafile(filename)
+ end
+end
+
+local strings = interfaces.strings
+
+implement {
+ name = "usemodules",
+ actions = environment.usemodules,
+ arguments = strings[2]
+}
+
+implement {
+ name = "doifelseolderversion",
+ actions = function(one,two) commands.doifelse(comparedversion(one,two) >= 0) end,
+ arguments = strings[2]
+}
+
+implement {
+ name = "useluamodule",
+ actions = environment.useluamodule,
+ arguments = "string"
+}
+
+implement {
+ name = "loadluamodule",
+ actions = function(name) dofile(resolvers.findctxfile(name)) end, -- hack
+ arguments = "string"
+}
+