summaryrefslogtreecommitdiff
path: root/tex/context/base/trac-deb.lua
blob: ae3a4d0674cd7443007df0537d33f5a803e3c840 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
if not modules then modules = { } end modules ['trac-deb'] = {
    version   = 1.001,
    comment   = "companion to trac-deb.mkiv",
    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
    copyright = "PRAGMA ADE / ConTeXt Development Team",
    license   = "see context related readme files"
}

local lpeg, status = lpeg, status

local lpegmatch = lpeg.match
local format, concat, match, find = string.format, table.concat, string.match, string.find
local tonumber, tostring = tonumber, tostring

-- maybe tracers -> tracers.tex (and tracers.lua for current debugger)

local report_tex  = logs.reporter("tex error")
local report_lua  = logs.reporter("lua error")
local report_nl   = logs.newline
local report_str  = logs.writer

tracers           = tracers or { }
local tracers     = tracers

tracers.lists     = { }
local lists       = tracers.lists

tracers.strings   = { }
local strings     = tracers.strings

local texgetdimen = tex.getdimen
local texgettoks  = tex.gettoks
local texgetcount = tex.getcount

strings.undefined = "undefined"

lists.scratch = {
    0, 2, 4, 6, 8
}

lists.internals = {
    'p:hsize', 'p:parindent', 'p:leftskip','p:rightskip',
    'p:vsize', 'p:parskip', 'p:baselineskip', 'p:lineskip', 'p:topskip'
}

lists.context = {
    'd:lineheight',
    'c:realpageno', 'c:userpageno', 'c:pageno', 'c:subpageno'
}

local types = {
    ['d'] = tracers.dimen,
    ['c'] = tracers.count,
    ['t'] = tracers.toks,
    ['p'] = tracers.primitive
}

local splitboth = lpeg.splitat(":")
local splittype = lpeg.firstofsplit(":")
local splitname = lpeg.secondofsplit(":")

function tracers.type(csname)
    return lpegmatch(splittype,csname)
end

function tracers.name(csname)
    return lpegmatch(splitname,csname) or csname
end

function tracers.cs(csname)
    local tag, name = lpegmatch(splitboth,csname)
    if name and types[tag] then
        return types[tag](name)
    else
        return tracers.primitive(csname)
    end
end

function tracers.dimen(name)
    local d = texgetdimen(name)
    return d and number.topoints(d) or strings.undefined
end

function tracers.count(name)
    return texgetcount(name) or strings.undefined
end

function tracers.toks(name,limit)
    local t = texgettoks(name)
    return t and string.limit(t,tonumber(limit) or 40) or strings.undefined
end

function tracers.primitive(name)
    return tex[name] or strings.undefined
end

function tracers.knownlist(name)
    local l = lists[name]
    return l and #l > 0
end

local savedluaerror = nil

function tracers.showlines(filename,linenumber,offset,luaerrorline)
    local data = io.loaddata(filename)
    if not data or data == "" then
        local hash = url.hashed(filename)
        if not hash.noscheme then
            local ok, d, n = resolvers.loaders.byscheme(hash.scheme,filename)
            if ok and n > 0 then
                data = d
            end
        end
    end
    local lines = data and string.splitlines(data)
    if lines and #lines > 0 then
        if luaerrorline and luaerrorline > 0 then
            -- lua error: linenumber points to last line
            local start = "\\startluacode"
            local stop  = "\\stopluacode"
            local n = linenumber
            for i=n,1,-1 do
                if find(lines[i],start) then
                    n = i + luaerrorline - 1
                    if n <= linenumber then
                        linenumber = n
                    end
                    break
                end
            end
        end
        offset = tonumber(offset) or 10
        linenumber = tonumber(linenumber) or 10
        local start = math.max(linenumber - offset,1)
        local stop = math.min(linenumber + offset,#lines)
        if stop > #lines then
            return "<linenumber past end of file>"
        else
            local result, fmt = { }, "%" .. #tostring(stop) .. "d %s  %s"
            for n=start,stop do
                result[#result+1] = format(fmt,n,n == linenumber and ">>" or "  ",lines[n])
            end
            return concat(result,"\n")
        end
    else
        return "<empty file>"
    end
end

-- this will work ok in >=0.79

local function processerror(offset)
    local inputstack   = resolvers.inputstack
    local filename     = inputstack[#inputstack] or status.filename
    local linenumber   = tonumber(status.linenumber) or 0
    local lasttexerror = status.lasterrorstring or "?"
    local lastluaerror = status.lastluaerrorstring or lasttexerror
    local luaerrorline = match(lastluaerror,[[lua:.-(%d+)]]) or (lastluaerror and find(lastluaerror,"?:0:",1,true) and 0)
    local report       = luaerrorline and report_lua or report_tex
    tracers.printerror {
        filename     = filename,
        linenumber   = linenumber,
        lasttexerror = lasttexerror,
        lastluaerror = lastluaerror,
        luaerrorline = luaerrorline,
        offset       = tonumber(offset) or 10,
    }
end

-- so one can overload the printer if (really) needed

function tracers.printerror(specification)
    local filename     = specification.filename
    local linenumber   = specification.linenumber
    local lasttexerror = specification.lasttexerror
    local lastluaerror = specification.lastluaerror
    local luaerrorline = specification.luaerrorline
    local offset       = specification.offset
    local report       = luaerrorline and report_lua or report_tex
    if not filename then
        report("error not related to input file: %s ...",lasttexerror)
    elseif type(filename) == "number" then
        report("error on line %s of filehandle %s: %s ...",linenumber,lasttexerror)
    else
        report_nl()
        if luaerrorline then
            report("error on line %s in file %s:\n\n%s",linenumber,filename,lastluaerror)
--             report("error on line %s in file %s:\n\n%s",linenumber,filename,lasttexerror)
        else
            report("error on line %s in file %s: %s",linenumber,filename,lasttexerror)
            if tex.show_context then
                report_nl()
                tex.show_context()
            end
        end
        report_nl()
        report_str(tracers.showlines(filename,linenumber,offset,tonumber(luaerrorline)))
        report_nl()
    end
end

local nop = function() end

directives.register("system.errorcontext", function(v)
    local register = callback.register
    if v then
        register('show_error_message',  nop)
        register('show_error_hook',     function() processerror(v) end)
        register('show_lua_error_hook', nop)
    else
        register('show_error_message',  nil)
        register('show_error_hook',     nil)
        register('show_lua_error_hook', nil)
    end
end)

-- this might move

lmx = lmx or { }

lmx.htmfile = function(name) return environment.jobname .. "-status.html" end
lmx.lmxfile = function(name) return resolvers.findfile(name,'tex') end

function lmx.showdebuginfo(lmxname)
    local variables = {
        ['title']                = 'ConTeXt Debug Information',
        ['color-background-one'] = lmx.get('color-background-green'),
        ['color-background-two'] = lmx.get('color-background-blue'),
    }
    if lmxname == false then
        return variables
    else
        lmx.show(lmxname or 'context-debug.lmx',variables)
    end
end

function lmx.showerror(lmxname)
    local filename, linenumber, errorcontext = status.filename, tonumber(status.linenumber) or 0, ""
    if not filename then
        filename, errorcontext = 'unknown', 'error in filename'
    elseif type(filename) == "number" then
        filename, errorcontext = format("<read %s>",filename), 'unknown error'
    else
        errorcontext = tracers.showlines(filename,linenumber,offset)
    end
    local variables = {
        ['title']                = 'ConTeXt Error Information',
        ['errormessage']         = status.lasterrorstring,
        ['linenumber']           = linenumber,
        ['color-background-one'] = lmx.get('color-background-yellow'),
        ['color-background-two'] = lmx.get('color-background-purple'),
        ['filename']             = filename,
        ['errorcontext']         = errorcontext,
    }
    if lmxname == false then
        return variables
    else
        lmx.show(lmxname or 'context-error.lmx',variables)
    end
end

function lmx.overloaderror()
    callback.register('show_error_hook', function() lmx.showerror() end) -- prevents arguments being passed
end

directives.register("system.showerror", lmx.overloaderror)

local debugger = utilities.debugger

local function trace_calls(n)
    debugger.enable()
    luatex.registerstopactions(function()
        debugger.disable()
        debugger.savestats(tex.jobname .. "-luacalls.log",tonumber(n))
    end)
    trace_calls = function() end
end

directives.register("system.tracecalls", function(n) trace_calls(n) end) -- indirect is needed for nilling