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1if not modules then modules = { } end modules ['data-tmf'] = {
2    version   = 1.001,
3    comment   = "companion to luat-lib.mkiv",
4    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
5    copyright = "PRAGMA ADE / ConTeXt Development Team",
6    license   = "see context related readme files"
7}
8
9local resolvers  = resolvers
10
11local report_tds = logs.reporter("resolvers","tds")
12
13--  =  <<
14--  ?  ??
15--  <  +=
16--  >  =+
17
18function resolvers.load_tree(tree,resolve)
19    if type(tree) == "string" and tree ~= "" then
20
21        local getenv, setenv = resolvers.getenv, resolvers.setenv
22
23        -- later might listen to the raw osenv var as well
24        local texos   = "texmf-" .. os.platform
25
26        local oldroot = environment.texroot
27        local newroot = file.collapsepath(tree)
28
29        local newtree = file.join(newroot,texos)
30        local newpath = file.join(newtree,"bin")
31
32        if not lfs.isdir(newtree) then
33            report_tds("no %a under tree %a",texos,tree)
34            os.exit()
35        end
36        if not lfs.isdir(newpath) then
37            report_tds("no '%s/bin' under tree %a",texos,tree)
38            os.exit()
39        end
40
41        local texmfos = newtree
42
43        environment.texroot = newroot
44        environment.texos   = texos
45        environment.texmfos = texmfos
46
47        -- Beware, we need to obey the relocatable autoparent so we
48        -- set TEXMFCNF to its raw value. This is somewhat tricky when
49        -- we run a mkii job from within. Therefore, in mtxrun, there
50        -- is a resolve applied when we're in mkii/kpse mode or when
51        -- --resolve is passed to mtxrun. Maybe we should also set the
52        -- local AUTOPARENT etc. although these are alwasy set new.
53
54        if resolve then
55         -- resolvers.luacnfspec = resolvers.joinpath(resolvers.resolve(resolvers.expandedpathfromlist(resolvers.splitpath(resolvers.luacnfspec))))
56            resolvers.luacnfspec = resolvers.resolve(resolvers.luacnfspec)
57        end
58
59        setenv('SELFAUTOPARENT', newroot)
60        setenv('SELFAUTODIR',    newtree)
61        setenv('SELFAUTOLOC',    newpath)
62        setenv('TEXROOT',        newroot)
63        setenv('TEXOS',          texos)
64        setenv('TEXMFOS',        texmfos)
65        setenv('TEXMFCNF',       resolvers.luacnfspec,true) -- already resolved
66        setenv('PATH',           newpath .. io.pathseparator .. getenv('PATH'))
67
68        report_tds("changing from root %a to %a",oldroot,newroot)
69        report_tds("prepending %a to PATH",newpath)
70        report_tds("setting TEXMFCNF to %a",resolvers.luacnfspec)
71        report_tds()
72    end
73end
74