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if not modules then modules = { } end modules ['data-tre'] = {
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"
}
-- \input tree://oeps1/**/oeps.tex
local find, gsub, lower = string.find, string.gsub, string.lower
local basename, dirname, joinname = file.basename, file.dirname, file .join
local globdir, isdir = dir.glob, lfs.isdir
local trace_locating = false trackers.register("resolvers.locating", function(v) trace_locating = v end)
local report_trees = logs.reporter("resolvers","trees")
local resolvers = resolvers
local resolveprefix = resolvers.resolve
local notfound = resolvers.finders.notfound
-- A tree search is rather dumb ... there is some basic caching of searched trees
-- but nothing is cached over runs ... it's also a wildcard one so we cannot use
-- the normal scanner.
local collectors = { }
local found = { }
function resolvers.finders.tree(specification) -- to be adapted to new formats
local spec = specification.filename
local okay = found[spec]
if okay == nil then
if spec ~= "" then
local path = dirname(spec)
local name = basename(spec)
if path == "" then
path = "."
end
local names = collectors[path]
if not names then
local pattern = find(path,"/%*+$") and path or (path .. "/*")
names = globdir(pattern)
collectors[path] = names
end
local pattern = "/" .. gsub(name,"([%.%-%+])", "%%%1") .. "$"
for i=1,#names do
local fullname = names[i]
if find(fullname,pattern) then
found[spec] = fullname
return fullname
end
end
end
okay = notfound() -- false
found[spec] = okay
end
return okay
end
function resolvers.locators.tree(specification)
local name = specification.filename
local realname = resolveprefix(name) -- no shortcut
if realname and realname ~= '' and isdir(realname) then
if trace_locating then
report_trees("locator %a found",realname)
end
resolvers.appendhash('tree',name,false) -- don't cache
elseif trace_locating then
report_trees("locator %a not found",name)
end
end
function resolvers.hashers.tree(specification)
local name = specification.filename
if trace_locating then
report_trees("analysing %a",name)
end
resolvers.methodhandler("hashers",name)
resolvers.generators.file(specification)
end
-- This is a variation on tree lookups but this time we do cache in the given
-- root. We use a similar hasher as the resolvers because we have to deal with
-- for instance trees with 50K xml files plus a similar amount of resources to
-- deal and we don't want too much overhead.
local collectors = { }
table.setmetatableindex(collectors, function(t,k)
local rootname = gsub(k,"[/%*]+$","")
local dataname = joinname(rootname,"dirlist")
local data = caches.loadcontent(dataname,"files",dataname)
local content = data and data.content
local lookup = resolvers.get_from_content
if not content then
content = resolvers.scanfiles(rootname)
caches.savecontent(dataname,"files",content,dataname)
end
local files = content.files
local v = function(filename)
local path, name = lookup(content,filename)
if not path then
return filename
elseif type(path) == "table" then
-- maybe a warning that the first name is taken
path = path[1]
end
return joinname(rootname,path,name)
end
t[k] = v
return v
end)
function resolvers.finders.dirlist(specification) -- can be called directly too
local spec = specification.filename
if spec ~= "" then
local path, name = dirname(spec), basename(spec)
return path and collectors[path](name) or notfound()
end
return notfound()
end
resolvers.locators .dirlist = resolvers.locators .tree
resolvers.hashers .dirlist = resolvers.hashers .tree
resolvers.generators.dirlist = resolvers.generators.file
resolvers.openers .dirlist = resolvers.openers .file
resolvers.loaders .dirlist = resolvers.loaders .file
-- local locate = collectors[ [[E:\temporary\mb-mp]] ]
-- local locate = collectors( [[\\storage-2\resources\mb-mp]] )
-- print(resolvers.findtexfile("tree://e:/temporary/mb-mp/**/VB_wmf_03_vw_01d_ant.jpg"))
-- print(resolvers.findtexfile("tree://t:/**/tufte.tex"))
-- print(resolvers.findtexfile("dirlist://e:/temporary/mb-mp/**/VB_wmf_03_vw_01d_ant.jpg"))
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