restore otfl-basics-gen.lua (needed in fontdbutil)

1 files changed, 296 insertions, 0 deletions

diff --git a/otfl-basics-gen.lua b/otfl-basics-gen.lua
new file mode 100644
index 0000000..727086e
--- /dev/null
+++ b/otfl-basics-gen.lua
@@ -0,0 +1,296 @@
+if not modules then modules = { } end modules ['luat-basics-gen'] = {
+    version   = 1.100,
+    comment   = "companion to luatex-*.tex",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+if context then
+    texio.write_nl("fatal error: this module is not for context")
+    os.exit()
+end
+
+local dummyfunction = function() end
+----- dummyreporter = function(c) return function(...) texio.write_nl(c .. " : " .. string.format(...)) end end
+local dummyreporter = function(c) return function(...) texio.write_nl(c .. " : " .. string.formatters(...)) end end
+
+statistics = {
+    register      = dummyfunction,
+    starttiming   = dummyfunction,
+    stoptiming    = dummyfunction,
+    elapsedtime   = nil,
+}
+
+directives = {
+    register      = dummyfunction,
+    enable        = dummyfunction,
+    disable       = dummyfunction,
+}
+
+trackers = {
+    register      = dummyfunction,
+    enable        = dummyfunction,
+    disable       = dummyfunction,
+}
+
+experiments = {
+    register      = dummyfunction,
+    enable        = dummyfunction,
+    disable       = dummyfunction,
+}
+
+storage = { -- probably no longer needed
+    register      = dummyfunction,
+    shared        = { },
+}
+
+logs = {
+    new           = dummyreporter,
+    reporter      = dummyreporter,
+    messenger     = dummyreporter,
+    report        = dummyfunction,
+}
+
+callbacks = {
+    register = function(n,f) return callback.register(n,f) end,
+
+}
+
+utilities = {
+    storage = {
+        allocate = function(t) return t or { } end,
+        mark     = function(t) return t or { } end,
+    },
+}
+
+characters = characters or {
+    data = { }
+}
+
+-- we need to cheat a bit here
+
+texconfig.kpse_init = true
+
+resolvers = resolvers or { } -- no fancy file helpers used
+
+local remapper = {
+    otf    = "opentype fonts",
+    ttf    = "truetype fonts",
+    ttc    = "truetype fonts",
+    dfont  = "truetype fonts", -- "truetype dictionary",
+    cid    = "cid maps",
+    cidmap = "cid maps",
+    fea    = "font feature files",
+    pfa    = "type1 fonts", -- this is for Khaled, in ConTeXt we don't use this!
+    pfb    = "type1 fonts", -- this is for Khaled, in ConTeXt we don't use this!
+}
+
+function resolvers.findfile(name,fileformat)
+    name = string.gsub(name,"\\","/")
+    if not fileformat or fileformat == "" then
+        fileformat = file.suffix(name)
+        if fileformat == "" then
+            fileformat = "tex"
+        end
+    end
+    fileformat = string.lower(fileformat)
+    fileformat = remapper[fileformat] or fileformat
+    local found = kpse.find_file(name,fileformat)
+    if not found or found == "" then
+        found = kpse.find_file(name,"other text files")
+    end
+    return found
+end
+
+-- function resolvers.findbinfile(name,fileformat)
+--     if not fileformat or fileformat == "" then
+--         fileformat = file.suffix(name)
+--     end
+--     return resolvers.findfile(name,(fileformat and remapper[fileformat]) or fileformat)
+-- end
+
+resolvers.findbinfile = resolvers.findfile
+
+function resolvers.resolve(s)
+    return s
+end
+
+function resolvers.unresolve(s)
+    return s
+end
+
+-- Caches ... I will make a real stupid version some day when I'm in the
+-- mood. After all, the generic code does not need the more advanced
+-- ConTeXt features. Cached data is not shared between ConTeXt and other
+-- usage as I don't want any dependency at all. Also, ConTeXt might have
+-- different needs and tricks added.
+
+--~ containers.usecache = true
+
+caches = { }
+
+local writable, readables = nil, { }
+
+if not caches.namespace or caches.namespace == "" or caches.namespace == "context" then
+    caches.namespace = 'generic'
+end
+
+do
+
+    local cachepaths = kpse.expand_path('$TEXMFCACHE') or ""
+
+    if cachepaths == "" then
+        cachepaths = kpse.expand_path('$TEXMFVAR')
+    end
+
+    if cachepaths == "" then
+        cachepaths = kpse.expand_path('$VARTEXMF')
+    end
+
+    if cachepaths == "" then
+        cachepaths = "."
+    end
+
+    cachepaths = string.split(cachepaths,os.type == "windows" and ";" or ":")
+
+    for i=1,#cachepaths do
+        if file.is_writable(cachepaths[i]) then
+            writable = file.join(cachepaths[i],"luatex-cache")
+            lfs.mkdir(writable)
+            writable = file.join(writable,caches.namespace)
+            lfs.mkdir(writable)
+            break
+        end
+    end
+
+    for i=1,#cachepaths do
+        if file.is_readable(cachepaths[i]) then
+            readables[#readables+1] = file.join(cachepaths[i],"luatex-cache",caches.namespace)
+        end
+    end
+
+    if not writable then
+        texio.write_nl("quiting: fix your writable cache path")
+        os.exit()
+    elseif #readables == 0 then
+        texio.write_nl("quiting: fix your readable cache path")
+        os.exit()
+    elseif #readables == 1 and readables[1] == writable then
+        texio.write(string.format("(using cache: %s)",writable))
+    else
+        texio.write(string.format("(using write cache: %s)",writable))
+        texio.write(string.format("(using read cache: %s)",table.concat(readables, " ")))
+    end
+
+end
+
+function caches.getwritablepath(category,subcategory)
+    local path = file.join(writable,category)
+    lfs.mkdir(path)
+    path = file.join(path,subcategory)
+    lfs.mkdir(path)
+    return path
+end
+
+function caches.getreadablepaths(category,subcategory)
+    local t = { }
+    for i=1,#readables do
+        t[i] = file.join(readables[i],category,subcategory)
+    end
+    return t
+end
+
+local function makefullname(path,name)
+    if path and path ~= "" then
+        name = "temp-" .. name -- clash prevention
+        return file.addsuffix(file.join(path,name),"lua"), file.addsuffix(file.join(path,name),"luc")
+    end
+end
+
+function caches.is_writable(path,name)
+    local fullname = makefullname(path,name)
+    return fullname and file.is_writable(fullname)
+end
+
+function caches.loaddata(paths,name)
+    for i=1,#paths do
+        local data = false
+        local luaname, lucname = makefullname(paths[i],name)
+        if lucname and lfs.isfile(lucname) then -- maybe also check for size
+            texio.write(string.format("(load luc: %s)",lucname))
+            data = loadfile(lucname)
+            if data then
+                data = data()
+            end
+            if data then
+                return data
+            else
+                texio.write(string.format("(loading failed: %s)",lucname))
+            end
+        end
+        if luaname and lfs.isfile(luaname) then
+            texio.write(string.format("(load lua: %s)",luaname))
+            data = loadfile(luaname)
+            if data then
+                data = data()
+            end
+            if data then
+                return data
+            end
+        end
+    end
+end
+
+function caches.savedata(path,name,data)
+    local luaname, lucname = makefullname(path,name)
+    if luaname then
+        texio.write(string.format("(save: %s)",luaname))
+        table.tofile(luaname,data,true,{ reduce = true })
+        if lucname and type(caches.compile) == "function" then
+            os.remove(lucname) -- better be safe
+            texio.write(string.format("(save: %s)",lucname))
+            caches.compile(data,luaname,lucname)
+        end
+    end
+end
+
+-- According to KH os.execute is not permitted in plain/latex so there is
+-- no reason to use the normal context way. So the method here is slightly
+-- different from the one we have in context. We also use different suffixes
+-- as we don't want any clashes (sharing cache files is not that handy as
+-- context moves on faster.)
+--
+-- Beware: serialization might fail on large files (so maybe we should pcall
+-- this) in which case one should limit the method to luac and enable support
+-- for execution.
+
+caches.compilemethod = "both"
+
+function caches.compile(data,luaname,lucname)
+    local done = false
+    if caches.compilemethod == "luac" or caches.compilemethod == "both" then
+        done = os.spawn("texluac -o " .. string.quoted(lucname) .. " -s " .. string.quoted(luaname)) == 0
+    end
+    if not done and (caches.compilemethod == "dump" or caches.compilemethod == "both") then
+        local d = io.loaddata(luaname)
+        if not d or d == "" then
+            d = table.serialize(data,true) -- slow
+        end
+        if d and d ~= "" then
+            local f = io.open(lucname,'w')
+            if f then
+                local s
+                if _G["loadstring"] then s=loadstring(d) else s=load(d) end
+                f:write(string.dump(s))
+                f:close()
+            end
+        end
+    end
+end
+
+--
+
+function table.setmetatableindex(t,f)
+    setmetatable(t,{ __index = f })
+end