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if not modules then modules = { } end modules ['util-mrg'] = {
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"
}
-- hm, quite unreadable
local gsub, format = string.gsub, string.format
local concat = table.concat
local type, next = type, next
utilities = utilities or {}
utilities.merger = utilities.merger or { } -- maybe mergers
utilities.report = logs and logs.reporter("system") or print
local merger = utilities.merger
merger.strip_comment = true
local m_begin_merge = "begin library merge"
local m_end_merge = "end library merge"
local m_begin_closure = "do -- create closure to overcome 200 locals limit"
local m_end_closure = "end -- of closure"
local m_pattern =
"%c+" ..
"%-%-%s+" .. m_begin_merge ..
"%c+(.-)%c+" ..
"%-%-%s+" .. m_end_merge ..
"%c+"
local m_format =
"\n\n-- " .. m_begin_merge ..
"\n%s\n" ..
"-- " .. m_end_merge .. "\n\n"
local m_faked =
"-- " .. "created merged file" .. "\n\n" ..
"-- " .. m_begin_merge .. "\n\n" ..
"-- " .. m_end_merge .. "\n\n"
local function self_fake()
return m_faked
end
local function self_nothing()
return ""
end
local function self_load(name)
local data = io.loaddata(name) or ""
if data == "" then
utilities.report("merge: unknown file %s",name)
else
utilities.report("merge: inserting %s",name)
end
return data or ""
end
local function self_save(name, data)
if data ~= "" then
if merger.strip_comment then
-- saves some 20K
local n = #data
data = gsub(data,"%-%-~[^\n\r]*[\r\n]","")
utilities.report("merge: %s bytes of comment stripped, %s bytes of code left",n-#data,#data)
end
io.savedata(name,data)
utilities.report("merge: saving %s",name)
end
end
local function self_swap(data,code)
return data ~= "" and (gsub(data,m_pattern, function() return format(m_format,code) end, 1)) or ""
end
local function self_libs(libs,list)
local result, f, frozen, foundpath = { }, nil, false, nil
result[#result+1] = "\n"
if type(libs) == 'string' then libs = { libs } end
if type(list) == 'string' then list = { list } end
for i=1,#libs do
local lib = libs[i]
for j=1,#list do
local pth = gsub(list[j],"\\","/") -- file.clean_path
utilities.report("merge: checking library path %s",pth)
local name = pth .. "/" .. lib
if lfs.isfile(name) then
foundpath = pth
end
end
if foundpath then break end
end
if foundpath then
utilities.report("merge: using library path %s",foundpath)
local right, wrong = { }, { }
for i=1,#libs do
local lib = libs[i]
local fullname = foundpath .. "/" .. lib
if lfs.isfile(fullname) then
utilities.report("merge: using library %s",fullname)
right[#right+1] = lib
result[#result+1] = m_begin_closure
result[#result+1] = io.loaddata(fullname,true)
result[#result+1] = m_end_closure
else
utilities.report("merge: skipping library %s",fullname)
wrong[#wrong+1] = lib
end
end
if #right > 0 then
utilities.report("merge: used libraries: %s",concat(right," "))
end
if #wrong > 0 then
utilities.report("merge: skipped libraries: %s",concat(wrong," "))
end
else
utilities.report("merge: no valid library path found")
end
return concat(result, "\n\n")
end
function merger.selfcreate(libs,list,target)
if target then
self_save(target,self_swap(self_fake(),self_libs(libs,list)))
end
end
function merger.selfmerge(name,libs,list,target)
self_save(target or name,self_swap(self_load(name),self_libs(libs,list)))
end
function merger.selfclean(name)
self_save(name,self_swap(self_load(name),self_nothing()))
end
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