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1if not modules then modules = { } end modules ['luat-sta'] = {
2    version   = 1.001,
3    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
4    copyright = "PRAGMA ADE / ConTeXt Development Team",
5    license   = "see context related readme files"
6}
7
8-- this code is used in the updater
9
10local gmatch, match = string.gmatch, string.match
11local type = type
12
13states          = states or { }
14local states    = states
15
16states.data     = states.data or { }
17local data      = states.data
18
19states.hash     = states.hash or { }
20local hash      = states.hash
21
22states.tag      = states.tag      or ""
23states.filename = states.filename or ""
24
25function states.save(filename,tag)
26    tag = tag or states.tag
27    filename = file.addsuffix(filename or states.filename,'lus')
28    io.savedata(filename,
29        "-- generator : luat-sta.lua\n" ..
30        "-- state tag : " .. tag .. "\n\n" ..
31        table.serialize(data[tag or states.tag] or {},true)
32    )
33end
34
35function states.load(filename,tag)
36    states.filename = filename
37    states.tag = tag or "whatever"
38    states.filename = file.addsuffix(states.filename,'lus')
39    data[states.tag], hash[states.tag] = (io.exists(filename) and dofile(filename)) or { }, { }
40end
41
42local function set_by_tag(tag,key,value,default,persistent)
43    local d, h = data[tag], hash[tag]
44    if d then
45        if type(d) == "table" then
46            local dkey, hkey = key, key
47            local pre, post = match(key,"(.+)%.([^%.]+)$")
48            if pre and post then
49                for k in gmatch(pre,"[^%.]+") do
50                    local dk = d[k]
51                    if not dk then
52                        dk = { }
53                        d[k] = dk
54                    elseif type(dk) == "string" then
55                        -- invalid table, unable to upgrade structure
56                        -- hope for the best or delete the state file
57                        break
58                    end
59                    d = dk
60                end
61                dkey, hkey = post, key
62            end
63            if value == nil then
64                value = default
65            elseif value == false then
66                -- special case
67            elseif persistent then
68                value = value or d[dkey] or default
69            else
70                value = value or default
71            end
72            d[dkey], h[hkey] = value, value
73        elseif type(d) == "string" then
74            -- weird
75            data[tag], hash[tag] = value, value
76        end
77    end
78end
79
80local function get_by_tag(tag,key,default)
81    local h = hash[tag]
82    if h and h[key] then
83        return h[key]
84    else
85        local d = data[tag]
86        if d then
87            for k in gmatch(key,"[^%.]+") do
88                local dk = d[k]
89                if dk ~= nil then
90                    d = dk
91                else
92                    return default
93                end
94            end
95            if d == false then
96                return false
97            else
98                return d or default
99            end
100        end
101    end
102end
103
104states.set_by_tag = set_by_tag
105states.get_by_tag = get_by_tag
106
107function states.set(key,value,default,persistent)
108    set_by_tag(states.tag,key,value,default,persistent)
109end
110
111function states.get(key,default)
112    return get_by_tag(states.tag,key,default)
113end
114
115--~ data.update = {
116--~ 	["version"] = {
117--~ 		["major"] = 0,
118--~ 		["minor"] = 1,
119--~ 	},
120--~ 	["rsync"] = {
121--~ 		["server"]     = "contextgarden.net",
122--~ 		["module"]     = "minimals",
123--~ 		["repository"] = "current",
124--~ 		["flags"]      = "-rpztlv --stats",
125--~ 	},
126--~ 	["tasks"] = {
127--~ 		["update"] = true,
128--~ 		["make"]   = true,
129--~         ["delete"] = false,
130--~ 	},
131--~ 	["platform"] = {
132--~ 		["host"]  = true,
133--~ 		["other"] = {
134--~ 			["mswin"]     = false,
135--~ 			["linux"]     = false,
136--~ 			["linux-64"]  = false,
137--~ 			["osx-intel"] = false,
138--~ 			["osx-ppc"]   = false,
139--~ 			["sun"]       = false,
140--~ 		},
141--~ 	},
142--~ 	["context"] = {
143--~ 		["available"] = {"current", "beta", "alpha", "experimental"},
144--~ 		["selected"]  = "current",
145--~ 	},
146--~ 	["formats"] = {
147--~ 		["cont-en"] = true,
148--~ 		["cont-nl"] = true,
149--~ 		["cont-de"] = false,
150--~ 		["cont-cz"] = false,
151--~ 		["cont-fr"] = false,
152--~ 		["cont-ro"] = false,
153--~ 	},
154--~ 	["engine"] = {
155--~ 		["pdftex"] = {
156--~ 			["install"] = true,
157--~ 			["formats"] = {
158--~ 				["pdftex"] = true,
159--~ 			},
160--~ 		},
161--~ 		["luatex"] = {
162--~ 			["install"] = true,
163--~ 			["formats"] = {
164--~ 			},
165--~ 		},
166--~ 		["xetex"] = {
167--~ 			["install"] = true,
168--~ 			["formats"] = {
169--~ 				["xetex"] = false,
170--~ 			},
171--~ 		},
172--~ 		["metapost"] = {
173--~ 			["install"] = true,
174--~ 			["formats"] = {
175--~ 				["mpost"] = true,
176--~ 				["metafun"] = true,
177--~ 			},
178--~ 		},
179--~ 	},
180--~ 	["fonts"] = {
181--~ 	},
182--~ 	["doc"] = {
183--~ 	},
184--~ 	["modules"] = {
185--~ 		["f-urwgaramond"] = false,
186--~ 		["f-urwgothic"] = false,
187--~ 		["t-bnf"] = false,
188--~ 		["t-chromato"] = false,
189--~ 		["t-cmscbf"] = false,
190--~ 		["t-cmttbf"] = false,
191--~ 		["t-construction-plan"] = false,
192--~ 		["t-degrade"] = false,
193--~ 		["t-french"] = false,
194--~ 		["t-lettrine"] = false,
195--~ 		["t-lilypond"] = false,
196--~ 		["t-mathsets"] = false,
197--~ 		["t-tikz"] = false,
198--~ 		["t-typearea"] = false,
199--~ 		["t-vim"] = false,
200--~ 	},
201--~ }
202
203--~ states.save("teststate", "update")
204--~ states.load("teststate", "update")
205
206--~ print(states.get_by_tag("update","rsync.server","unknown"))
207--~ states.set_by_tag("update","rsync.server","oeps")
208--~ print(states.get_by_tag("update","rsync.server","unknown"))
209--~ states.save("teststate", "update")
210--~ states.load("teststate", "update")
211--~ print(states.get_by_tag("update","rsync.server","unknown"))
212