2016-01-12 16:26:00

1 files changed, 360 insertions, 0 deletions

diff --git a/tex/context/base/mkiv/data-ini.lua b/tex/context/base/mkiv/data-ini.lua
new file mode 100644
index 000000000..c74ff2e04
--- /dev/null
+++ b/tex/context/base/mkiv/data-ini.lua
@@ -0,0 +1,360 @@
+if not modules then modules = { } end modules ['data-ini'] = {
+    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",
+}
+
+local next, type, getmetatable, rawset = next, type, getmetatable, rawset
+local gsub, find, gmatch, char = string.gsub, string.find, string.gmatch, string.char
+local filedirname, filebasename, filejoin = file.dirname, file.basename, file.join
+local ostype, osname, osuname, ossetenv, osgetenv = os.type, os.name, os.uname, os.setenv, os.getenv
+
+local P, S, R, C, Cs, Cc, lpegmatch = lpeg.P, lpeg.S, lpeg.R, lpeg.C, lpeg.Cs, lpeg.Cc, lpeg.match
+
+local trace_locating   = false  trackers.register("resolvers.locating",   function(v) trace_locating   = v end)
+local trace_detail     = false  trackers.register("resolvers.details",    function(v) trace_detail     = v end)
+local trace_expansions = false  trackers.register("resolvers.expansions", function(v) trace_expansions = v end)
+
+local report_initialization = logs.reporter("resolvers","initialization")
+
+-- The code here used to be part of a data-res but for convenience we now split it over multiple
+-- files. As this file is now the starting point we introduce resolvers here. We also put some
+-- helpers here that later can be reimplemented of extended.
+
+resolvers       = resolvers or { }
+local resolvers = resolvers
+
+-- We don't want the kpse library to kick in. Also, we want to be able to
+-- execute programs. Control over execution is implemented later.
+
+texconfig.kpse_init    = false
+texconfig.shell_escape = 't'
+
+if not (environment and environment.default_texmfcnf) and kpse and kpse.default_texmfcnf then
+    local default_texmfcnf = kpse.default_texmfcnf()
+    -- looks more like context:
+    default_texmfcnf = gsub(default_texmfcnf,"$SELFAUTOLOC","selfautoloc:")
+    default_texmfcnf = gsub(default_texmfcnf,"$SELFAUTODIR","selfautodir:")
+    default_texmfcnf = gsub(default_texmfcnf,"$SELFAUTOPARENT","selfautoparent:")
+    default_texmfcnf = gsub(default_texmfcnf,"$HOME","home:")
+    --
+    environment.default_texmfcnf = default_texmfcnf
+end
+
+kpse = { original = kpse }
+
+setmetatable(kpse, {
+    __index = function(kp,name)
+        report_initialization("fatal error: kpse library is accessed (key: %s)",name)
+        os.exit()
+    end
+} )
+
+-- First we check a couple of environment variables. Some might be
+-- set already but we need then later on. We start with the system
+-- font path.
+
+do
+
+    local osfontdir = osgetenv("OSFONTDIR")
+
+    if osfontdir and osfontdir ~= "" then
+        -- ok
+    elseif osname == "windows" then
+        ossetenv("OSFONTDIR","c:/windows/fonts//")
+    elseif osname == "macosx" then
+        ossetenv("OSFONTDIR","$HOME/Library/Fonts//;/Library/Fonts//;/System/Library/Fonts//")
+    end
+
+end
+
+-- Next comes the user's home path. We need this as later on we have
+-- to replace ~ with its value.
+
+do
+
+    local homedir = osgetenv(ostype == "windows" and 'USERPROFILE' or 'HOME') or ''
+
+    if not homedir or homedir == "" then
+        homedir = char(127) -- we need a value, later we wil trigger on it
+    end
+
+    homedir = file.collapsepath(homedir)
+
+    ossetenv("HOME",       homedir) -- can be used in unix cnf files
+    ossetenv("USERPROFILE",homedir) -- can be used in windows cnf files
+
+    environment.homedir = homedir
+
+end
+
+-- The following code sets the name of the own binary and its
+-- path. This is fallback code as we have os.selfdir now.
+
+do
+
+    local args = environment.originalarguments or arg -- this needs a cleanup
+
+    if not environment.ownmain then
+        environment.ownmain = status and string.match(string.lower(status.banner),"this is ([%a]+)") or "luatex"
+    end
+
+    local ownbin  = environment.ownbin  or args[-2] or arg[-2] or args[-1] or arg[-1] or arg[0] or "luatex"
+    local ownpath = environment.ownpath or os.selfdir
+
+    ownbin  = file.collapsepath(ownbin)
+    ownpath = file.collapsepath(ownpath)
+
+    if not ownpath or ownpath == "" or ownpath == "unset" then
+        ownpath = args[-1] or arg[-1]
+        ownpath = ownpath and filedirname(gsub(ownpath,"\\","/"))
+        if not ownpath or ownpath == "" then
+            ownpath = args[-0] or arg[-0]
+            ownpath = ownpath and filedirname(gsub(ownpath,"\\","/"))
+        end
+        local binary = ownbin
+        if not ownpath or ownpath == "" then
+            ownpath = ownpath and filedirname(binary)
+        end
+        if not ownpath or ownpath == "" then
+            if os.binsuffix ~= "" then
+                binary = file.replacesuffix(binary,os.binsuffix)
+            end
+            local path = osgetenv("PATH")
+            if path then
+                for p in gmatch(path,"[^"..io.pathseparator.."]+") do
+                    local b = filejoin(p,binary)
+                    if lfs.isfile(b) then
+                        -- we assume that after changing to the path the currentdir function
+                        -- resolves to the real location and use this side effect here; this
+                        -- trick is needed because on the mac installations use symlinks in the
+                        -- path instead of real locations
+                        local olddir = lfs.currentdir()
+                        if lfs.chdir(p) then
+                            local pp = lfs.currentdir()
+                            if trace_locating and p ~= pp then
+                                report_initialization("following symlink %a to %a",p,pp)
+                            end
+                            ownpath = pp
+                            lfs.chdir(olddir)
+                        else
+                            if trace_locating then
+                                report_initialization("unable to check path %a",p)
+                            end
+                            ownpath =  p
+                        end
+                        break
+                    end
+                end
+            end
+        end
+        if not ownpath or ownpath == "" then
+            ownpath = "."
+            report_initialization("forcing fallback to ownpath %a",ownpath)
+        elseif trace_locating then
+            report_initialization("using ownpath %a",ownpath)
+        end
+    end
+
+    environment.ownbin  = ownbin
+    environment.ownpath = ownpath
+
+end
+
+resolvers.ownpath = environment.ownpath
+
+function resolvers.getownpath()
+    return environment.ownpath
+end
+
+-- The self variables permit us to use only a few (or even no)
+-- environment variables.
+
+do
+
+    local ownpath = environment.ownpath or dir.current()
+
+    if ownpath then
+        ossetenv('SELFAUTOLOC',    file.collapsepath(ownpath))
+        ossetenv('SELFAUTODIR',    file.collapsepath(ownpath .. "/.."))
+        ossetenv('SELFAUTOPARENT', file.collapsepath(ownpath .. "/../.."))
+    else
+        report_initialization("error: unable to locate ownpath")
+        os.exit()
+    end
+
+end
+
+-- The running os:
+
+-- todo: check is context sits here os.platform is more trustworthy
+-- that the bin check as mtx-update runs from another path
+
+local texos   = environment.texos   or osgetenv("TEXOS")
+local texmfos = environment.texmfos or osgetenv('SELFAUTODIR')
+
+if not texos or texos == "" then
+    texos = file.basename(texmfos)
+end
+
+ossetenv('TEXMFOS',       texmfos)      -- full bin path
+ossetenv('TEXOS',         texos)        -- partial bin parent
+ossetenv('SELFAUTOSYSTEM',os.platform)  -- bonus
+
+environment.texos   = texos
+environment.texmfos = texmfos
+
+-- The current root:
+
+local texroot = environment.texroot or osgetenv("TEXROOT")
+
+if not texroot or texroot == "" then
+    texroot = osgetenv('SELFAUTOPARENT')
+    ossetenv('TEXROOT',texroot)
+end
+
+environment.texroot = file.collapsepath(texroot)
+
+if type(profiler) == "table" and not jit then
+    directives.register("system.profile",function()
+        profiler.start("luatex-profile.log")
+    end)
+end
+
+-- a forward definition
+
+-- Because we use resolvers.resolve a lot later on, we will implement the basics here and
+-- add more later.
+
+local prefixes     = utilities.storage.allocate()
+resolvers.prefixes = prefixes
+
+local resolved     = { }
+local abstract     = { }
+local dynamic      = { }
+
+function resolvers.resetresolve(str)
+    resolved, abstract = { }, { }
+end
+
+function resolvers.allprefixes(separator)
+    local all = table.sortedkeys(prefixes)
+    if separator then
+        for i=1,#all do
+            all[i] = all[i] .. ":"
+        end
+    end
+    return all
+end
+
+local function _resolve_(method,target)
+    local action = prefixes[method]
+    if action then
+        return action(target)
+    else
+        return method .. ":" .. target
+    end
+end
+
+function resolvers.unresolve(str)
+    return abstract[str] or str
+end
+
+function resolvers.setdynamic(str)
+    dynamic[str] = true
+end
+
+-- home:xx;selfautoparent:xx;
+
+local pattern   = Cs((C(R("az")^2) * P(":") * C((1-S(" \"\';,"))^1) / _resolve_ + P(1))^0)
+
+local prefix    = C(R("az")^2) * P(":")
+local target    = C((1-S(" \"\';,"))^1)
+local notarget  = (#S(";,") + P(-1)) * Cc("")
+
+local p_resolve = Cs(((prefix * (target + notarget)) / _resolve_ + P(1))^0)
+local p_simple  = prefix * P(-1)
+
+local function resolve(str) -- use schemes, this one is then for the commandline only
+    if type(str) == "table" then
+        local res = { }
+        for i=1,#str do
+            res[i] = resolve(str[i])
+        end
+        return res
+    end
+    -- already resolved
+    local res = resolved[str]
+    if res then
+        return res
+    end
+    -- simple resolving of (dynamic) methods
+    local simple = lpegmatch(p_simple,str)
+    local action = prefixes[simple]
+    if action then
+        local res = action(res)
+        if not dynamic[simple] then
+            resolved[simple] = res
+            abstract[res] = simple
+        end
+        return res
+    end
+    -- more extensive resolving (multiple too)
+    res = lpegmatch(p_resolve,str)
+    resolved[str] = res
+    abstract[res] = str
+    return res
+end
+
+resolvers.resolve = resolve
+
+if type(osuname) == "function" then
+
+    for k, v in next, osuname() do
+        if not prefixes[k] then
+            prefixes[k] = function() return v end
+        end
+    end
+
+end
+
+if ostype == "unix" then
+
+    -- We need to distringuish between a prefix and something else : so we
+    -- have a special repath variant for linux. Also, when a new prefix is
+    -- defined, we need to remake the matcher.
+
+    local pattern
+
+    local function makepattern(t,k,v)
+        if t then
+            rawset(t,k,v)
+        end
+        local colon = P(":")
+        for k, v in table.sortedpairs(prefixes) do
+            if p then
+                p = P(k) + p
+            else
+                p = P(k)
+            end
+        end
+        pattern = Cs((p * colon + colon/";" + P(1))^0)
+    end
+
+    makepattern()
+
+    table.setmetatablenewindex(prefixes,makepattern)
+
+    function resolvers.repath(str)
+        return lpegmatch(pattern,str)
+    end
+
+else -- already the default:
+
+    function resolvers.repath(str)
+        return str
+    end
+
+end