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improve globber discipline with weird characters in paths (for ``luaotfload v2.2d` / texlive 2013)

View luaotfload-database.lua
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if not modules then modules = { } end modules ['luaotfload-database'] = {
version = 2.2,
comment = "companion to luaotfload.lua",
author = "Khaled Hosny, Elie Roux, Philipp Gesang",
copyright = "Luaotfload Development Team",
license = "GNU GPL v2"
}
 
--- TODO: if the specification is an absolute filename with a font not in the
--- database, add the font to the database and load it. There is a small
--- difficulty with the filenames of the TEXMF tree that are referenced as
--- relative paths...
 
--- Luatex builtins
local load = load
local next = next
local pcall = pcall
local require = require
local tonumber = tonumber
 
local fontloaderinfo = fontloader.info
local iolines = io.lines
local ioopen = io.open
local kpseexpand_path = kpse.expand_path
local kpseexpand_var = kpse.expand_var
local kpselookup = kpse.lookup
local kpsereadable_file = kpse.readable_file
local lfsisdir = lfs.isdir
local lfsisfile = lfs.isfile
local mathabs = math.abs
local mathmin = math.min
local stringfind = string.find
local stringformat = string.format
local stringgmatch = string.gmatch
local stringgsub = string.gsub
local stringlower = string.lower
local stringsub = string.sub
local stringupper = string.upper
local tableconcat = table.concat
local tablecopy = table.copy
local tablesort = table.sort
local tabletofile = table.tofile
local texiowrite_nl = texio.write_nl
local utf8gsub = unicode.utf8.gsub
local utf8lower = unicode.utf8.lower
 
--- these come from Lualibs/Context
local dirglob = dir.glob
local dirmkdirs = dir.mkdirs
local filebasename = file.basename
local filenameonly = file.nameonly
local filedirname = file.dirname
local filecollapsepath = file.collapsepath or file.collapse_path
local fileextname = file.extname
local fileiswritable = file.iswritable
local filejoin = file.join
local filereplacesuffix = file.replacesuffix
local filesplitpath = file.splitpath or file.split_path
local stringis_empty = string.is_empty
local stringsplit = string.split
local stringstrip = string.strip
local tableappend = table.append
local tabletohash = table.tohash
 
local lpeg = require "lpeg"
 
local C, Cc, Cf, Cg, Cs, Ct
= lpeg.C, lpeg.Cc, lpeg.Cf, lpeg.Cg, lpeg.Cs, lpeg.Ct
 
local P, R, S, lpegmatch
= lpeg.P, lpeg.R, lpeg.S, lpeg.match
 
--- the font loader namespace is “fonts”, same as in Context
--- we need to put some fallbacks into place for when running
--- as a script
fonts = fonts or { }
fonts.names = fonts.names or { }
fonts.definers = fonts.definers or { }
 
local names = fonts.names
 
names.version = 2.204
names.data = nil --- contains the loaded database
names.lookups = nil --- contains the lookup cache
names.path = {
dir = "", --- db and cache directory
basename = "luaotfload-names.lua", --- db file name
path = "", --- full path to db file
lookup_basename = "luaotfload-lookup-cache.lua", --- cache file name
lookup_path = "", --- cache full path
}
 
config = config or { }
config.luaotfload = config.luaotfload or { }
config.luaotfload.resolver = config.luaotfload.resolver or "normal"
if config.luaotfload.update_live ~= false then
--- this option allows for disabling updates
--- during a TeX run
config.luaotfload.update_live = true
end
 
-- We use the cache.* of ConTeXt (see luat-basics-gen), we can
-- use it safely (all checks and directory creations are already done). It
-- uses TEXMFCACHE or TEXMFVAR as starting points.
local writable_path
if caches then
writable_path = caches.getwritablepath("names","")
if not writable_path then
luaotfload.error("Impossible to find a suitable writeable cache...")
end
names.path.dir = writable_path
names.path.path = filejoin(writable_path, names.path.basename)
names.path.lookup_path = filejoin(writable_path, names.path.lookup_basename)
else --- running as script, inject some dummies
caches = { }
logs = { report = function () end }
end
 
 
--[[doc--
Auxiliary functions
--doc]]--
 
 
local report = logs.names_report
 
--- string -> string
local sanitize_string = function (str)
if str ~= nil then
return utf8gsub(utf8lower(str), "[^%a%d]", "")
end
return nil
end
 
local preescape_path --- working around funky characters
do
local escape = function (chr) return "%" .. chr end
local funkychar = S"()[]"
local pattern = Cs((funkychar/escape + 1)^0)
 
preescape_path = function (str)
return lpegmatch (pattern, str)
end
end
 
--[[doc--
This is a sketch of the luaotfload db:
type dbobj = {
mappings : fontentry list;
status : filestatus;
version : float;
// preliminary additions of v2.2:
basenames : (string, int) hash; // where int is the index in mappings
barenames : (string, int) hash; // where int is the index in mappings
}
and fontentry = {
familyname : string;
filename : (string * int); // int: subfont
fontname : string;
fullname : string;
names : {
family : string;
fullname : string;
psname : string;
subfamily : string;
}
size : int list;
slant : int;
weight : int;
width : int;
units_per_em : int; // mainly 1000, but also 2048 or 256
}
and filestatus = (fullname, { index : int list; timestamp : int }) dict
beware that this is a reconstruction and may be incomplete.
mtx-fonts has in names.tma:
type names = {
cache_uuid : uuid;
cache_version : float;
datastate : uuid list;
fallbacks : (filetype, (basename, int) hash) hash;
families : (basename, int list) hash;
files : (filename, fullname) hash;
indices : (fullname, int) hash;
mappings : (filetype, (basename, int) hash) hash;
names : ? (empty hash) ?;
rejected : (basename, int) hash;
specifications: fontentry list;
}
and fontentry = {
designsize : int;
familyname : string;
filename : string;
fontname : string;
format : string;
fullname : string;
maxsize : int;
minsize : int;
modification : int;
rawname : string;
style : string;
subfamily : string;
variant : string;
weight : string;
width : string;
}
--doc]]--
 
local fontnames_init = function (keep_cache) --- returns dbobj
return {
mappings = { },
status = { },
barenames = { },
basenames = { },
-- fullnames = { }, // -> status
version = names.version,
}
end
 
--- string -> (string * string)
local make_savenames = function (path)
return filereplacesuffix(path, "lua"),
filereplacesuffix(path, "luc")
end
 
--- When loading a lua file we try its binary complement first, which
--- is assumed to be located at an identical path, carrying the suffix
--- .luc.
 
--- string -> (string * table)
local load_lua_file = function (path)
local foundname = filereplacesuffix(path, "luc")
 
local fh = ioopen(foundname, "rb") -- try bin first
if fh then
local chunk = fh:read"*all"
fh:close()
code = load(chunk, "b")
end
 
if not code then --- fall back to text file
foundname = filereplacesuffix(path, "lua")
fh = ioopen(foundname, "rb")
if fh then
local chunk = fh:read"*all"
fh:close()
code = load(chunk, "t")
end
end
 
if not code then return nil, nil end
return foundname, code()
end
 
--- define locals in scope
local crude_file_lookup
local crude_file_lookup_verbose
local find_closest
local flush_lookup_cache
local font_fullinfo
local load_names
local load_lookups
local read_fonts_conf
local reload_db
local resolve
local resolve_cached
local save_names
local save_lookups
local update_names
 
--- state of the database
local fonts_loaded = false
local fonts_reloaded = false
 
--- limit output when approximate font matching (luaotfload-tool -F)
local fuzzy_limit = 1 --- display closest only
 
--- bool? -> dbobj
load_names = function (dry_run)
local starttime = os.gettimeofday()
local foundname, data = load_lua_file(names.path.path)
 
if data then
report("both", 2, "db",
"Font names database loaded", "%s", foundname)
report("info", 3, "db", "Loading took %0.f ms",
1000*(os.gettimeofday()-starttime))
else
report("both", 0, "db",
[[Font names database not found, generating new one.
This can take several minutes; please be patient.]])
data = update_names(fontnames_init(false), nil, dry_run)
local success = save_names(data)
if not success then
report("both", 0, "db", "Database creation unsuccessful.")
end
end
fonts_loaded = true
return data
end
 
--- unit -> dbobj
load_lookups = function ( )
local foundname, data = load_lua_file(names.path.lookup_path)
if data then
report("both", 3, "cache",
"Lookup cache loaded (%s)", foundname)
else
report("both", 1, "cache",
"No lookup cache, creating empty.")
data = { }
end
return data
end
 
local style_synonyms = { set = { } }
do
style_synonyms.list = {
regular = { "normal", "roman",
"plain", "book",
"medium", },
bold = { "demi", "demibold",
"semibold", "boldregular",},
italic = { "regularitalic", "normalitalic",
"oblique", "slanted", },
bolditalic = { "boldoblique", "boldslanted",
"demiitalic", "demioblique",
"demislanted", "demibolditalic",
"semibolditalic", },
}
 
for category, synonyms in next, style_synonyms.list do
style_synonyms.set[category] = tabletohash(synonyms, true)
end
end
 
local type1_formats = { "tfm", "ofm", }
 
--- string -> string
crude_file_lookup_verbose = function (filename)
if not names.data then names.data = load_names() end
local data = names.data
local mappings = data.mappings
local found
 
--- look up in db first ...
found = data.barenames[filename]
if found and mappings[found] then
found = mappings[found].filename[1]
report("info", 0, "db",
"crude file lookup: req=%s; hit=bare; ret=%s",
filename, found)
return found
end
found = data.basenames[filename]
if found and mappings[found] then
found = mappings[found].filename[1]
report("info", 0, "db",
"crude file lookup: req=%s; hit=base; ret=%s",
filename, found)
return found
end
 
--- ofm and tfm
for i=1, #type1_formats do
local format = type1_formats[i]
if resolvers.findfile(filename, format) then
return file.addsuffix(filename, format), format
end
end
return filename, nil
end
 
--- string -> string
crude_file_lookup = function (filename)
if not names.data then names.data = load_names() end
local data = names.data
local mappings = data.mappings
local found = data.barenames[filename]
or data.basenames[filename]
if found then
found = data.mappings[found]
if found then return found.filename[1] end
end
for i=1, #type1_formats do
local format = type1_formats[i]
if resolvers.findfile(filename, format) then
return file.addsuffix(filename, format), format
end
end
return filename, nil
end
 
--[[doc--
Lookups can be quite costly, more so the less specific they are.
Even if we find a matching font eventually, the next time the
user compiles Eir document E will have to stand through the delay
again.
Thus, some caching of results -- even between runs -- is in order.
We’ll just store successful name: lookups in a separate cache file.
type lookup_cache = (string, (string * num)) dict
Complete, needs testing:
× 1) add cache to dbobj
× 2) wrap lookups in cached versions
× 3) make caching optional (via the config table) for debugging
× 4) make names_update() cache aware (nil if “force”)
× 5) add logging
× 6) add cache control to luaotfload-tool
× 7) incr db version (now 2.203)
× 8) save cache only at the end of a run
The spec is modified in place (ugh), so we’ll have to catalogue what
fields actually influence its behavior.
Idk what the “spec” resolver is for.
lookup inspects modifies
file: name forced, name
name:* name, style, sub, resolved, sub, name, forced
optsize, size
spec: name, sub resolved, sub, name, forced
* name: contains both the name resolver from luatex-fonts and resolve()
below
From my reading of font-def.lua, what a resolver does is
basically rewrite the “name” field of the specification record
with the resolution.
Also, the fields “resolved”, “sub”, “force” etc. influence the outcome.
--doc]]--
 
--- 'a -> 'a -> table -> (string * int|boolean * boolean)
resolve_cached = function (_, _, specification)
--if not names.data then names.data = load_names() end
if not names.lookups then names.lookups = load_lookups() end
local request = specification.specification
report("both", 4, "cache", "looking for “%s” in cache ...",
request)
 
local found = names.lookups[request]
 
--- case 1) cache positive ----------------------------------------
if found then --- replay fields from cache hit
report("info", 4, "cache", "found!")
return found[1], found[2], true
end
report("both", 4, "cache", "not cached; resolving")
 
--- case 2) cache negative ----------------------------------------
--- first we resolve normally ...
local filename, subfont, success = resolve(nil, nil, specification)
if not success then return filename, subfont, false end
--- ... then we add the fields to the cache ... ...
local entry = { filename, subfont }
report("both", 4, "cache", "new entry: %s", request)
names.lookups[request] = entry
 
--- obviously, the updated cache needs to be stored.
--- TODO this should trigger a save only once the
--- document is compiled (finish_pdffile callback?)
report("both", 5, "cache", "saving updated cache")
local success = save_lookups()
if not success then --- sad, but not critical
report("both", 0, "cache", "could not write to cache")
end
return filename, subfont, true
end
 
--- this used to be inlined; with the lookup cache we don’t
--- have to be parsimonious wrt function calls anymore
--- “found” is the match accumulator
local add_to_match = function (
found, optsize, dsnsize, size,
minsize, maxsize, face)
local continue = true
if optsize then
if dsnsize == size or (size > minsize and size <= maxsize) then
found[1] = face
continue = false ---> break
else
found[#found+1] = face
end
else
found[1] = face
continue = false ---> break
end
return found, continue
end
 
--[[doc--
Luatex-fonts, the font-loader package luaotfload imports, comes with
basic file location facilities (see luatex-fonts-syn.lua).
However, not only does the builtin functionality rely on Context’s font
name database, it is also too limited to be of more than basic use.
For this reason, luaotfload supplies its own resolvers that accesses
the font database created by the luaotfload-tool script.
--doc]]--
 
 
---
--- the request specification has the fields:
---
--- · features: table
--- · normal: set of { ccmp clig itlc kern liga locl mark mkmk rlig }
--- · ???
--- · forced: string
--- · lookup: "name" | "file"
--- · method: string
--- · name: string
--- · resolved: string
--- · size: int
--- · specification: string (== <lookup> ":" <name>)
--- · sub: string
---
--- the first return value of “resolve” is the file name of the
--- requested font (string)
--- the second is of type bool or string and indicates the subfont of a
--- ttc
---
--- 'a -> 'a -> table -> (string * string | bool * bool)
---
--- note by phg: I added a third return value that indicates a
--- successful lookup as this cannot be inferred from the other
--- values.
---
 
resolve = function (_,_,specification) -- the 1st two parameters are used by ConTeXt
if not fonts_loaded then names.data = load_names() end
local data = names.data
 
local name = sanitize_string(specification.name)
local style = sanitize_string(specification.style) or "regular"
 
local size
if specification.optsize then
size = tonumber(specification.optsize)
elseif specification.size then
size = specification.size / 65536
end
 
if type(data) ~= "table" then
--- this catches a case where load_names() doesn’t
--- return a database object, which can happen only
--- in case there is valid Lua code in the database,
--- but it’s not a table, e.g. it contains an integer.
if not fonts_reloaded then
return reload_db("invalid database; not a table",
resolve, nil, nil, specification
)
end
--- unsucessfully reloaded; bail
return specification.name, false, false
end
 
local db_version, nms_version = data.version, names.version
if db_version ~= nms_version then
report("log", 0, "db",
[[version mismatch; expected %4.3f, got %4.3f]],
nms_version, db_version
)
return reload_db("version mismatch", resolve, nil, nil, specification)
end
 
if not data.mappings then
return reload_db("invalid database; missing font mapping",
resolve, nil, nil, specification
)
end
 
local found = { }
local synonym_set = style_synonyms.set
for _, face in next, data.mappings do
local family, subfamily, fullname, psname, fontname, pfullname
 
local facenames = face.sanitized
if facenames then
family = facenames.family
subfamily = facenames.subfamily
fullname = facenames.fullname
psname = facenames.psname
fontname = facenames.fontname
pfullname = facenames.pfullname
end
fontname = fontname or sanitize_string(face.fontname)
pfullname = pfullname or sanitize_string(face.fullname)
 
local optsize, dsnsize, maxsize, minsize
if #face.size > 0 then
optsize = face.size
dsnsize = optsize[1] and optsize[1] / 10
-- can be nil
maxsize = optsize[2] and optsize[2] / 10 or dsnsize
minsize = optsize[3] and optsize[3] / 10 or dsnsize
end
 
if name == family then
if subfamily == style then
local continue
found, continue = add_to_match(
found, optsize, dsnsize, size,
minsize, maxsize, face)
if continue == false then break end
elseif synonym_set[style] and
synonym_set[style][subfamily]
then
local continue
found, continue = add_to_match(
found, optsize, dsnsize, size,
minsize, maxsize, face)
if continue == false then break end
elseif subfamily == "regular" or
synonym_set.regular[subfamily] then
found.fallback = face
elseif name == fullname
or name == pfullname
or name == fontname
or name == psname
then
local continue
found, continue = add_to_match(
found, optsize, dsnsize, size,
minsize, maxsize, face)
if continue == false then break end
end
else
if name == fullname
or name == pfullname
or name == fontname
or name == psname then
local continue
found, continue = add_to_match(
found, optsize, dsnsize, size,
minsize, maxsize, face)
if continue == false then break end
end
end
end
 
if #found == 1 then
--- “found” is really synonymous with “registered in the db”.
local filename = found[1].filename[1]
if lfsisfile(filename) or kpselookup(filename) then
report("log", 0, "resolve",
"font family='%s', subfamily='%s' found: %s",
name, style, filename
)
return filename, found[1].filename[2], true
end
elseif #found > 1 then
-- we found matching font(s) but not in the requested optical
-- sizes, so we loop through the matches to find the one with
-- least difference from the requested size.
local closest
local least = math.huge -- initial value is infinity
for i,face in next, found do
local dsnsize = face.size[1]/10
local difference = mathabs(dsnsize-size)
if difference < least then
closest = face
least = difference
end
end
local filename = closest.filename[1]
if lfsisfile(filename) or kpselookup(filename) then
report("log", 0, "resolve",
"font family='%s', subfamily='%s' found: %s",
name, style, filename
)
return filename, closest.filename[2], true
end
elseif found.fallback then
return found.fallback.filename[1],
found.fallback.filename[2],
true
end
 
--- no font found so far
if not fonts_reloaded then
--- last straw: try reloading the database
return reload_db(
"unresolved font name: ‘" .. name .. "",
resolve, nil, nil, specification
)
end
 
--- else, fallback to requested name
return specification.name, false, false
end --- resolve()
 
--- when reload is triggered we update the database
--- and then re-run the caller with the arg list
 
--- string -> ('a -> 'a) -> 'a list -> 'a
reload_db = function (why, caller, ...)
report("both", 1, "db", "reload initiated; reason: “%s”", why)
names.data = update_names()
local success = save_names()
if success then
fonts_reloaded = true
return caller(...)
end
report("both", 0, "db", "Database update unsuccessful.")
end
 
--- string -> string -> int
local iterative_levenshtein = function (s1, s2)
 
local costs = { }
local len1, len2 = #s1, #s2
 
for i = 0, len1 do
local last = i
for j = 0, len2 do
if i == 0 then
costs[j] = j
else
if j > 0 then
local current = costs[j-1]
if stringsub(s1, i, i) ~= stringsub(s2, j, j) then
current = mathmin(current, last, costs[j]) + 1
end
costs[j-1] = last
last = current
end
end
end
if i > 0 then costs[len2] = last end
end
 
return costs[len2]--- lower right has the distance
end
 
--- string -> int -> bool
find_closest = function (name, limit)
local name = sanitize_string(name)
limit = limit or fuzzy_limit
 
if not fonts_loaded then names.data = load_names() end
 
local data = names.data
 
if type(data) ~= "table" then
return reload_db("no database", find_closest, name)
end
local by_distance = { } --- (int, string list) dict
local distances = { } --- int list
local cached = { } --- (string, int) dict
local mappings = data.mappings
local n_fonts = #mappings
 
for n = 1, n_fonts do
local current = mappings[n]
local cnames = current.sanitized
--[[
This is simplistic but surpisingly fast.
Matching is performed against the “family” name
of a db record. We then store its “fullname” at
it edit distance.
We should probably do some weighting over all the
font name categories as well as whatever agrep
does.
--]]
if cnames then
local fullname, family = cnames.fullname, cnames.family
family = sanitize_string(family)
 
local dist = cached[family]--- maybe already calculated
if not dist then
dist = iterative_levenshtein(name, family)
cached[family] = dist
end
local namelst = by_distance[dist]
if not namelst then --- first entry
namelst = { fullname }
distances[#distances+1] = dist
else --- append
namelst[#namelst+1] = fullname
end
by_distance[dist] = namelst
end
end
 
--- print the matches according to their distance
local n_distances = #distances
if n_distances > 0 then --- got some data
tablesort(distances)
limit = mathmin(n_distances, limit)
report(false, 1, "query",
"displaying %d distance levels", limit)
 
for i = 1, limit do
local dist = distances[i]
local namelst = by_distance[dist]
report(false, 0, "query",
"distance from “" .. name .. "”: " .. dist
.. "\n " .. tableconcat(namelst, "\n ")
)
end
 
return true
end
return false
end --- find_closest()
 
local sanitize_names = function (names)
local res = { }
for idx, name in next, names do
res[idx] = sanitize_string(name)
end
return res
end
 
--[[doc--
The data inside an Opentype font file can be quite heterogeneous.
Thus in order to get the relevant information, parts of the original
table as returned by the font file reader need to be relocated.
--doc]]--
font_fullinfo = function (filename, subfont)
local tfmdata = { }
local rawfont = fontloader.open(filename, subfont)
if not rawfont then
report("log", 1, "error", "failed to open %s", filename)
return
end
local metadata = fontloader.to_table(rawfont)
fontloader.close(rawfont)
collectgarbage("collect")
-- see http://www.microsoft.com/typography/OTSPEC/features_pt.htm#size
if metadata.fontstyle_name then
for _, name in next, metadata.fontstyle_name do
if name.lang == 1033 then --- I hate magic numbers
tfmdata.fontstyle_name = name.name
end
end
end
if metadata.names then
for _, namedata in next, metadata.names do
if namedata.lang == "English (US)" then
local names = {
--- see
--- https://developer.apple.com/fonts/TTRefMan/RM06/Chap6name.html
fullname = namedata.names.compatfull
or namedata.names.fullname,
family = namedata.names.preffamilyname
or namedata.names.family,
subfamily = tfmdata.fontstyle_name
or namedata.names.prefmodifiers
or namedata.names.subfamily,
psname = namedata.names.postscriptname,
pfullname = metadata.fullname,
fontname = metadata.fontname,
}
tfmdata.names = names
tfmdata.sanitized = sanitize_names(names)
end
end
else
-- no names table, propably a broken font
report("log", 1, "db", "broken font rejected", "%s", basefile)
return
end
tfmdata.fontname = metadata.fontname
tfmdata.fullname = metadata.fullname
tfmdata.familyname = metadata.familyname
tfmdata.filename = { filename, subfont } -- always store full path
tfmdata.weight = metadata.pfminfo.weight
tfmdata.width = metadata.pfminfo.width
tfmdata.slant = metadata.italicangle
--- this is for querying
tfmdata.units_per_em = metadata.units_per_em
tfmdata.version = metadata.version
-- don't waste the space with zero values
tfmdata.size = {
metadata.design_size ~= 0 and metadata.design_size or nil,
metadata.design_range_top ~= 0 and metadata.design_range_top or nil,
metadata.design_range_bottom ~= 0 and metadata.design_range_bottom or nil,
}
return tfmdata
end
 
--- we return true if the fond is new or re-indexed
--- string -> dbobj -> dbobj -> bool
local load_font = function (fullname, fontnames, newfontnames)
if not fullname then
return false
end
 
local newmappings = newfontnames.mappings
local newstatus = newfontnames.status
 
-- local newfullnames = newfontnames.fullnames
local newbasenames = newfontnames.basenames
local newbarenames = newfontnames.barenames
 
local mappings = fontnames.mappings
local status = fontnames.status
-- local fullnames = fontnames.fullnames
local basenames = fontnames.basenames
local barenames = fontnames.barenames
 
local basename = filebasename(fullname)
local barename = filenameonly(fullname)
 
local entryname = basename
 
if names.blacklist[fullname] or names.blacklist[basename]
then
report("log", 2, "db",
"ignoring blacklisted font “%s”", fullname)
return false
end
 
local timestamp, db_timestamp
db_timestamp = status[fullname]
and status[fullname].timestamp
timestamp = lfs.attributes(fullname, "modification")
 
local index_status = newstatus[fullname]
--- index_status: nil | false | table
if index_status and index_status.timestamp == timestamp then
-- already indexed this run
return false
end
 
newstatus[fullname] = newstatus[fullname] or { }
newstatus[fullname].timestamp = timestamp
newstatus[fullname].index = newstatus[fullname].index or { }
 
--- this test compares the modification data registered
--- in the database with the current one
if db_timestamp == timestamp
and not newstatus[fullname].index[1] then
for _,v in next, status[fullname].index do
local index = #newstatus[fullname].index
local fullinfo = mappings[v]
local location = #newmappings + 1
newmappings[location] = fullinfo --- keep
newstatus[fullname].index[index+1] = location --- is this actually used anywhere?
-- newfullnames[fullname] = location
newbasenames[basename] = location
newbarenames[barename] = location
end
report("log", 2, "db", "font “%s” already indexed", entryname)
return false
end
 
local info = fontloaderinfo(fullname)
if info then
if type(info) == "table" and #info > 1 then --- ttc
for n_font = 1, #info do
local fullinfo = font_fullinfo(fullname, n_font-1)
if not fullinfo then
return false
end
local location = #newmappings+1
local index = newstatus[fullname].index[n_font]
if not index then index = location end
 
newmappings[index] = fullinfo
-- newfullnames[fullname] = location
newbasenames[basename] = location
newbarenames[barename] = location
newstatus[fullname].index[n_font] = index
end
else
local fullinfo = font_fullinfo(fullname, false)
if not fullinfo then
return false
end
local location = #newmappings+1
local index = newstatus[fullname].index[1]
if not index then index = location end
 
newmappings[index] = fullinfo
-- newfullnames[fullname] = location
newbasenames[basename] = location
newbarenames[barename] = location
newstatus[fullname].index[1] = index
end
 
else --- missing info
report("log", 1, "db", "failed to load “%s”", entryname)
return false
end
return true
end
 
local path_normalize
do
--- os.type and os.name are constants so we
--- choose a normalization function in advance
--- instead of testing with every call
local os_type, os_name = os.type, os.name
local filecollapsepath = filecollapsepath
local lfsreadlink = lfs.readlink
 
--- windows and dos
if os_type == "windows" or os_type == "msdos" then
--- ms platfom specific stuff
path_normalize = function (path)
path = stringgsub(path, '\\', '/')
path = stringlower(path)
path = filecollapsepath(path)
return path
end
--[[doc--
Cygwin used to be treated different from windows and dos. This
special treatment was removed with a patch submitted by Ken Brown.
Reference: http://cygwin.com/ml/cygwin/2013-05/msg00006.html
--doc]]--
 
else -- posix
path_normalize = function (path)
local dest = lfsreadlink(path)
if dest then
if kpsereadable_file(dest) then
path = dest
elseif kpsereadable_file(filejoin(filedirname(path), dest)) then
path = filejoin(file.dirname(path), dest)
else
-- broken symlink?
end
end
path = filecollapsepath(path)
return path
end
end
end
 
fonts.path_normalize = path_normalize
 
names.blacklist = { }
 
local function read_blacklist()
local files = {
kpselookup("luaotfload-blacklist.cnf", {all=true, format="tex"})
}
local blacklist = names.blacklist
local whitelist = { }
 
if files and type(files) == "table" then
for _,v in next, files do
for line in iolines(v) do
line = stringstrip(line) -- to get rid of lines like " % foo"
local first_chr = stringsub(line, 1, 1) --- faster than find
if first_chr == "%" or stringis_empty(line) then
-- comment or empty line
else
--- this is highly inefficient
line = stringsplit(line, "%")[1]
line = stringstrip(line)
if stringsub(line, 1, 1) == "-" then
whitelist[stringsub(line, 2, -1)] = true
else
report("log", 2, "db", "blacklisted file “%s”", line)
blacklist[line] = true
end
end
end
end
end
for _,fontname in next, whitelist do
blacklist[fontname] = nil
end
end
 
local font_extensions = { "otf", "ttf", "ttc", "dfont" }
local font_extensions_set = {}
for key, value in next, font_extensions do
font_extensions_set[value] = true
end
 
--[[doc--
scan_dir() scans a directory and populates the list of fonts
with all the fonts it finds.
· dirname : name of the directory to scan
· fontnames : current font db object
· newnames : font db object to fill
· dry_run : don’t touch anything
--doc]]--
 
--- string -> dbobj -> dbobj -> bool -> (int * int)
local scan_dir = function (dirname, fontnames, newfontnames, dry_run)
local n_scanned, n_new = 0, 0 --- total of fonts collected
report("both", 2, "db", "scanning directory %s", dirname)
for _,i in next, font_extensions do
for _,ext in next, { i, stringupper(i) } do
local escapeddir = preescape_path (dirname)
local found = dirglob (stringformat("%s/**.%s$",
escapeddir, ext))
local n_found = #found
--- note that glob fails silently on broken symlinks, which
--- happens sometimes in TeX Live.
report("both", 4, "db", "%s '%s' fonts found", n_found, ext)
n_scanned = n_scanned + n_found
for j=1, n_found do
local fullname = found[j]
fullname = path_normalize(fullname)
local new
if dry_run == true then
report("both", 1, "db", "would have been loading “%s”", fullname)
else
report("both", 4, "db", "loading font “%s”", fullname)
local new = load_font(fullname, fontnames, newfontnames)
if new == true then
n_new = n_new + 1
end
end
end
end
end
report("both", 4, "db", "%d fonts found in '%s'", n_scanned, dirname)
return n_scanned, n_new
end
 
--- dbobj -> dbobj -> bool? -> (int * int)
local scan_texmf_fonts = function (fontnames, newfontnames, dry_run)
local n_scanned, n_new = 0, 0
--[[
This function scans all fonts in the texmf tree, through kpathsea
variables OPENTYPEFONTS and TTFONTS of texmf.cnf
]]
if stringis_empty(kpseexpand_path("$OSFONTDIR")) then
report("info", 2, "db", "Scanning TEXMF fonts...")
else
report("info", 2, "db", "Scanning TEXMF and OS fonts...")
end
local fontdirs = stringgsub(kpseexpand_path("$OPENTYPEFONTS"), "^%.", "")
fontdirs = fontdirs .. stringgsub(kpseexpand_path("$TTFONTS"), "^%.", "")
if not stringis_empty(fontdirs) then
for _,d in next, filesplitpath(fontdirs) do
report("info", 4, "db", "Entering directory %s", d)
local found, new = scan_dir(d, fontnames, newfontnames, dry_run)
n_scanned = n_scanned + found
n_new = n_new + new
end
end
return n_scanned, n_new
end
 
--[[
For the OS fonts, there are several options:
- if OSFONTDIR is set (which is the case under windows by default but
not on the other OSs), it scans it at the same time as the texmf tree,
in the scan_texmf_fonts.
- if not:
- under Windows and Mac OSX, we take a look at some hardcoded directories
- under Unix, we read /etc/fonts/fonts.conf and read the directories in it
This means that if you have fonts in fancy directories, you need to set them
in OSFONTDIR.
]]
 
local read_fonts_conf
do --- closure for read_fonts_conf()
 
local alpha = R("az", "AZ")
local digit = R"09"
local tag_name = C(alpha^1)
local whitespace = S" \n\r\t\v"
local ws = whitespace^1
local comment = P"<!--" * (1 - P"--")^0 * P"-->"
 
---> header specifica
local xml_declaration = P"<?xml" * (1 - P"?>")^0 * P"?>"
local xml_doctype = P"<!DOCTYPE" * ws
* "fontconfig" * (1 - P">")^0 * P">"
local header = xml_declaration^-1
* (xml_doctype + comment + ws)^0
 
---> enforce root node
local root_start = P"<" * ws^-1 * P"fontconfig" * ws^-1 * P">"
local root_stop = P"</" * ws^-1 * P"fontconfig" * ws^-1 * P">"
 
local dquote, squote = P[["]], P"'"
local xml_namestartchar = S":_" + alpha --- ascii only, funk the rest
local xml_namechar = S":._" + alpha + digit
local xml_name = ws^-1
* C(xml_namestartchar * xml_namechar^0)
local xml_attvalue = dquote * C((1 - S[[%&"]])^1) * dquote * ws^-1
+ squote * C((1 - S[[%&']])^1) * squote * ws^-1
local xml_attr = Cg(xml_name * P"=" * xml_attvalue)
local xml_attr_list = Cf(Ct"" * xml_attr^1, rawset)
 
--[[doc--
scan_node creates a parser for a given xml tag.
--doc]]--
--- string -> bool -> lpeg_t
local scan_node = function (tag)
--- Node attributes go into a table with the index “attributes”
--- (relevant for “prefix="xdg"” and the likes).
local p_tag = P(tag)
local with_attributes = P"<" * p_tag
* Cg(xml_attr_list, "attributes")^-1
* ws^-1
* P">"
local plain = P"<" * p_tag * ws^-1 * P">"
local node_start = plain + with_attributes
local node_stop = P"</" * p_tag * ws^-1 * P">"
--- there is no nesting, the earth is flat ...
local node = node_start
* Cc(tag) * C(comment + (1 - node_stop)^1)
* node_stop
return Ct(node) -- returns {string, string [, attributes = { key = val }] }
end
 
--[[doc--
At the moment, the interesting tags are “dir” for
directory declarations, and “include” for including
further configuration files.
spec: http://freedesktop.org/software/fontconfig/fontconfig-user.html
--doc]]--
local include_node = scan_node"include"
local dir_node = scan_node"dir"
 
local element = dir_node
+ include_node
+ comment --> ignore
+ P(1-root_stop) --> skip byte
 
local root = root_start * Ct(element^0) * root_stop
local p_cheapxml = header * root
 
--lpeg.print(p_cheapxml) ---> 757 rules with v0.10
 
--[[doc--
fonts_conf_scanner() handles configuration files.
It is called on an abolute path to a config file (e.g.
/home/luser/.config/fontconfig/fonts.conf) and returns a list
of the nodes it managed to extract from the file.
--doc]]--
--- string -> path list
local fonts_conf_scanner = function (path)
local fh = ioopen(path, "r")
if not fh then
report("both", 3, "db", "cannot open fontconfig file %s", path)
return
end
local raw = fh:read"*all"
fh:close()
 
local confdata = lpegmatch(p_cheapxml, raw)
if not confdata then
report("both", 3, "db", "cannot scan fontconfig file %s", path)
return
end
return confdata
end
 
--[[doc--
read_fonts_conf_indeed() is called with six arguments; the
latter three are tables that represent the state and are
always returned.
The first three are
· the path to the file
· the expanded $HOME
· the expanded $XDG_CONFIG_DIR
--doc]]--
--- string -> string -> string -> tab -> tab -> (tab * tab * tab)
local read_fonts_conf_indeed
read_fonts_conf_indeed = function (start, home, xdg_home,
acc, done, dirs_done)
 
local paths = fonts_conf_scanner(start)
if not paths then --- nothing to do
return acc, done, dirs_done
end
 
for i=1, #paths do
local pathobj = paths[i]
local kind, path = pathobj[1], pathobj[2]
local attributes = pathobj.attributes
if attributes and attributes.prefix == "xdg" then
--- this prepends the xdg root (usually ~/.config)
path = filejoin(xdg_home, path)
end
 
if kind == "dir" then
if stringsub(path, 1, 1) == "~" then
path = filejoin(home, stringsub(path, 2))
end
--- We exclude paths with texmf in them, as they should be
--- found anyway; also duplicates are ignored by checking
--- if they are elements of dirs_done.
if not (stringfind(path, "texmf") or dirs_done[path]) then
acc[#acc+1] = path
dirs_done[path] = true
end
 
elseif kind == "include" then
--- here the path can be four things: a directory or a file,
--- in absolute or relative path.
if stringsub(path, 1, 1) == "~" then
path = filejoin(home, stringsub(path, 2))
elseif --- if the path is relative, we make it absolute
not ( lfsisfile(path) or lfsisdir(path) )
then
path = filejoin(filedirname(start), path)
end
if lfsisfile(path)
and kpsereadable_file(path)
and not done[path]
then
--- we exclude path with texmf in them, as they should
--- be found otherwise
acc = read_fonts_conf_indeed(
path, home, xdg_home,
acc, done, dirs_done)
elseif lfsisdir(path) then --- arrow code ahead
local escapedpath = preescape_path (path)
local config_files = dirglob
(filejoin(escapedpath, "*.conf"))
for _, filename in next, config_files do
if not done[filename] then
acc = read_fonts_conf_indeed(
filename, home, xdg_home,
acc, done, dirs_done)
end
end
end --- match “kind”
end --- iterate paths
end
 
--inspect(acc)
--inspect(done)
return acc, done, dirs_done
end --- read_fonts_conf_indeed()
 
--[[doc--
read_fonts_conf() sets up an accumulator and two sets
for tracking what’s been done.
Also, the environment variables HOME and XDG_CONFIG_HOME --
which are constants anyways -- are expanded so don’t have to
repeat that over and over again as with the old parser.
Now they’re just passed on to every call of
read_fonts_conf_indeed().
read_fonts_conf() is also the only reference visible outside
the closure.
--doc]]--
--- list -> list
read_fonts_conf = function (path_list)
local home = kpseexpand_path"~" --- could be os.getenv"HOME"
local xdg_home = kpseexpand_path"$XDG_CONFIG_HOME"
if xdg_home == "" then xdg_home = filejoin(home, ".config") end
local acc = { } ---> list: paths collected
local done = { } ---> set: files inspected
local dirs_done = { } ---> set: dirs in list
for i=1, #path_list do --- we keep the state between files
acc, done, dirs_done = read_fonts_conf_indeed(
path_list[i], home, xdg_home,
acc, done, dirs_done)
end
return acc
end
end --- read_fonts_conf closure
 
--- TODO stuff those paths into some writable table
--- unit -> string list
local function get_os_dirs()
if os.name == 'macosx' then
return {
filejoin(kpseexpand_path('~'), "Library/Fonts"),
"/Library/Fonts",
"/System/Library/Fonts",
"/Network/Library/Fonts",
}
elseif os.type == "windows" or os.type == "msdos" then
local windir = os.getenv("WINDIR")
return { filejoin(windir, 'Fonts') }
else
local fonts_conves = { --- plural, much?
"/usr/local/etc/fonts/fonts.conf",
"/etc/fonts/fonts.conf",
}
local os_dirs = read_fonts_conf(fonts_conves)
return os_dirs
end
return {}
end
 
--- dbobj -> dbobj -> bool? -> (int * int)
local scan_os_fonts = function (fontnames, newfontnames, dry_run)
local n_scanned, n_new = 0, 0
--[[
This function scans the OS fonts through
- fontcache for Unix (reads the fonts.conf file and scans the
directories)
- a static set of directories for Windows and MacOSX
]]
report("info", 2, "db", "Scanning OS fonts...")
report("info", 3, "db", "Searching in static system directories...")
for _, d in next, get_os_dirs() do
local found, new = scan_dir(d, fontnames, newfontnames, dry_run)
n_scanned = n_scanned + found
n_new = n_new + new
end
return n_scanned, n_new
end
 
--- unit -> (bool, lookup_cache)
flush_lookup_cache = function ()
if not names.lookups then names.lookups = load_lookups() end
names.lookups = { }
collectgarbage"collect"
return true, names.lookups
end
 
--- force: dictate rebuild from scratch
--- dry_dun: don’t write to the db, just scan dirs
 
--- dbobj? -> bool? -> bool? -> dbobj
update_names = function (fontnames, force, dry_run)
if config.luaotfload.update_live == false then
report("info", 2, "db",
"skipping database update")
--- skip all db updates
return fontnames
end
local starttime = os.gettimeofday()
local n_scanned, n_new = 0, 0
--[[
The main function, scans everything
- “newfontnames” is the final table to return
- force is whether we rebuild it from scratch or not
]]
report("both", 2, "db", "Updating the font names database"
.. (force and " forcefully" or ""))
 
if force then
fontnames = fontnames_init(false)
else
if not fontnames then
fontnames = load_names(dry_run)
end
if fontnames.version ~= names.version then
report("both", 1, "db", "No font names database or old "
.. "one found; generating new one")
fontnames = fontnames_init(true)
end
end
local newfontnames = fontnames_init(true)
read_blacklist()
 
local scanned, new
scanned, new = scan_texmf_fonts(fontnames, newfontnames, dry_run)
n_scanned = n_scanned + scanned
n_new = n_new + new
 
scanned, new = scan_os_fonts(fontnames, newfontnames, dry_run)
n_scanned = n_scanned + scanned
n_new = n_new + new
 
--- stats:
--- before rewrite | after rewrite
--- partial: 804 ms | 701 ms
--- forced: 45384 ms | 44714 ms
report("info", 3, "db",
"Scanned %d font files; %d new entries.", n_scanned, n_new)
report("info", 3, "db",
"Rebuilt in %0.f ms", 1000*(os.gettimeofday()-starttime))
return newfontnames
end
 
--- unit -> string
local ensure_names_path = function ( )
local path = names.path.dir
if not lfsisdir(path) then
dirmkdirs(path)
end
return path
end
 
--- The lookup cache is an experimental feature of version 2.2;
--- instead of incorporating it into the database it gets its own
--- file. As we update it after every single addition this saves us
--- quite some time.
 
--- unit -> bool
save_lookups = function ( )
---- this is boilerplate and should be refactored into something
---- usable by both the db and the cache writers
local lookups = names.lookups
local path = ensure_names_path()
if fileiswritable(path) then
local luaname, lucname = make_savenames(names.path.lookup_path)
if luaname then
tabletofile(luaname, lookups, true)
if lucname and type(caches.compile) == "function" then
os.remove(lucname)
caches.compile(lookups, luaname, lucname)
report("both", 3, "cache", "Lookup cache saved")
return true
end
end
end
report("info", 0, "cache", "Could not write lookup cache")
return false
end
 
--- save_names() is usually called without the argument
--- dbobj? -> bool
save_names = function (fontnames)
if not fontnames then fontnames = names.data end
local path = ensure_names_path()
if fileiswritable(path) then
local luaname, lucname = make_savenames(names.path.path)
if luaname then
--tabletofile(luaname, fontnames, true, { reduce=true })
tabletofile(luaname, fontnames, true)
if lucname and type(caches.compile) == "function" then
os.remove(lucname)
caches.compile(fontnames, luaname, lucname)
report("info", 1, "db", "Font names database saved")
return true
end
end
end
report("both", 0, "db", "Failed to save names database")
return false
end
 
--[[doc--
Below set of functions is modeled after mtx-cache.
--doc]]--
 
--- string -> string -> string list -> string list -> string list -> unit
local print_cache = function (category, path, luanames, lucnames, rest)
local report_indeed = function (...)
report("info", 0, "cache", ...)
end
report_indeed("Luaotfload cache: %s", category)
report_indeed("location: %s", path)
report_indeed("[raw] %4i", #luanames)
report_indeed("[compiled] %4i", #lucnames)
report_indeed("[other] %4i", #rest)
report_indeed("[total] %4i", #luanames + #lucnames + #rest)
end
 
--- string -> string -> string list -> bool -> bool
local purge_from_cache = function (category, path, list, all)
report("info", 2, "cache", "Luaotfload cache: %s %s",
(all and "erase" or "purge"), category)
report("info", 2, "cache", "location: %s",path)
local n = 0
for i=1,#list do
local filename = list[i]
if string.find(filename,"luatex%-cache") then -- safeguard
if all then
report("info", 5, "cache", "removing %s", filename)
os.remove(filename)
n = n + 1
else
local suffix = file.suffix(filename)
if suffix == "lua" then
local checkname = file.replacesuffix(
filename, "lua", "luc")
if lfs.isfile(checkname) then
report("info", 5, "cache", "removing %s", filename)
os.remove(filename)
n = n + 1
end
end
end
end
end
report("info", 2, "cache", "removed lua files : %i", n)
return true
end
--- string -> string list -> int -> string list -> string list -> string list ->
--- (string list * string list * string list * string list)
local collect_cache collect_cache = function (path, all, n, luanames,
lucnames, rest)
if not all then
local escapedpath = preescape_path (path)
local all = dirglob (escapedpath .. "/**/*")
local luanames, lucnames, rest = { }, { }, { }
return collect_cache(nil, all, 1, luanames, lucnames, rest)
end
 
local filename = all[n]
if filename then
local suffix = file.suffix(filename)
if suffix == "lua" then
luanames[#luanames+1] = filename
elseif suffix == "luc" then
lucnames[#lucnames+1] = filename
else
rest[#rest+1] = filename
end
return collect_cache(nil, all, n+1, luanames, lucnames, rest)
end
return luanames, lucnames, rest, all
end
 
--- unit -> unit
local purge_cache = function ( )
local writable_path = caches.getwritablepath()
local luanames, lucnames, rest = collect_cache(writable_path)
if logs.get_loglevel() > 1 then
print_cache("writable path", writable_path, luanames, lucnames, rest)
end
local success = purge_from_cache("writable path", writable_path, luanames, false)
return success
end
 
--- unit -> unit
local erase_cache = function ( )
local writable_path = caches.getwritablepath()
local luanames, lucnames, rest, all = collect_cache(writable_path)
if logs.get_loglevel() > 1 then
print_cache("writable path", writable_path, luanames, lucnames, rest)
end
local success = purge_from_cache("writable path", writable_path, all, true)
return success
end
 
local separator = function ( )
report("info", 0, string.rep("-", 67))
end
 
--- unit -> unit
local show_cache = function ( )
local readable_paths = caches.getreadablepaths()
local writable_path = caches.getwritablepath()
local luanames, lucnames, rest = collect_cache(writable_path)
 
separator()
print_cache("writable path", writable_path, luanames, lucnames, rest)
texiowrite_nl""
for i=1,#readable_paths do
local readable_path = readable_paths[i]
if readable_path ~= writable_path then
local luanames, lucnames = collect_cache(readable_path)
print_cache("readable path",
readable_path,luanames,lucnames,rest)
end
end
separator()
return true
end
 
-----------------------------------------------------------------------
--- export functionality to the namespace “fonts.names”
-----------------------------------------------------------------------
 
names.scan_dir = scan_dir
names.flush_lookup_cache = flush_lookup_cache
names.save_lookups = save_lookups
names.load = load_names
names.save = save_names
names.update = update_names
names.crude_file_lookup = crude_file_lookup
names.crude_file_lookup_verbose = crude_file_lookup_verbose
 
--- font cache
names.purge_cache = purge_cache
names.erase_cache = erase_cache
names.show_cache = show_cache
 
--- replace the resolver from luatex-fonts
if config.luaotfload.resolver == "cached" then
report("both", 2, "cache", "caching of name: lookups active")
names.resolve = resolve_cached
names.resolvespec = resolve_cached
else
names.resolve = resolve
names.resolvespec = resolve
end
names.find_closest = find_closest
 
-- for testing purpose
names.read_fonts_conf = read_fonts_conf
 
--- dummy required by luatex-fonts (cf. luatex-fonts-syn.lua)
 
fonts.names.getfilename = function (askedname,suffix) return "" end
 
-- vim:tw=71:sw=4:ts=4:expandtab
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