summaryrefslogtreecommitdiffstats
path: root/bin/scons-doc.py
blob: cf5d5b29d46c3e34e0c76387e4c3881c1a6d1c24 (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
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
#!/usr/bin/env python
#
# Copyright (c) 2010 The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#
# scons-doc.py -    an SGML preprocessor for capturing SCons output
#                   and inserting it into examples in our DocBook
#                   documentation
#
# Synopsis:
#
#  scons-doc [OPTIONS] [.in files]
#
#   When no input files are given, the folder doc/user/* is searched for .in files.
#
# Available options:
#
#   -d, --diff            create examples for the .in file and output a unified
#                         diff against the related .xml file
#   -r, --run             create examples for the .in file, but do not change
#                         any files
#   -s, --simple_diff     use a simpler output for the diff mode (no unified
#                         diff!)
#   -u, --update          create examples for the .in file and update the
#                         related .xml file
#
# This script looks for some SGML tags that describe SCons example
# configurations and commands to execute in those configurations, and
# uses TestCmd.py to execute the commands and insert the output from
# those commands into the SGML that we output.  This way, we can run a
# script and update all of our example documentation output without
# a lot of laborious by-hand checking.
#
# An "SCons example" looks like this, and essentially describes a set of
# input files (program source files as well as SConscript files):
#
#       <scons_example name="ex1">
#         <file name="SConstruct" printme="1">
#           env = Environment()
#           env.Program('foo')
#         </file>
#         <file name="foo.c">
#           int main() { printf("foo.c\n"); }
#         </file>
#       </scons_example>
#
# The <file> contents within the <scons_example> tag will get written
# into a temporary directory whenever example output needs to be
# generated.  By default, the <file> contents are not inserted into text
# directly, unless you set the "printme" attribute on one or more files,
# in which case they will get inserted within a <programlisting> tag.
# This makes it easy to define the example at the appropriate
# point in the text where you intend to show the SConstruct file.
#
# Note that you should usually give the <scons_example> a "name"
# attribute so that you can refer to the example configuration later to
# run SCons and generate output.
#
# If you just want to show a file's contents without worry about running
# SCons, there's a shorter <sconstruct> tag:
#
#       <sconstruct>
#         env = Environment()
#         env.Program('foo')
#       </sconstruct>
#
# This is essentially equivalent to <scons_example><file printme="1">,
# but it's more straightforward.
#
# SCons output is generated from the following sort of tag:
#
#       <scons_output example="ex1" os="posix">
#         <scons_output_command>scons -Q foo</scons_output_command>
#         <scons_output_command>scons -Q foo</scons_output_command>
#       </scons_output>
#
# You tell it which example to use with the "example" attribute, and then
# give it a list of <scons_output_command> tags to execute.  You can also
# supply an "os" tag, which specifies the type of operating system this
# example is intended to show; if you omit this, default value is "posix".
#
# The generated SGML will show the command line (with the appropriate
# command-line prompt for the operating system), execute the command in
# a temporary directory with the example files, capture the standard
# output from SCons, and insert it into the text as appropriate.
# Error output gets passed through to your error output so you
# can see if there are any problems executing the command.
#

import optparse
import os
import re
import sgmllib
import sys
import time
import glob

sys.path.append(os.path.join(os.getcwd(), 'QMTest'))
sys.path.append(os.path.join(os.getcwd(), 'build', 'QMTest'))

scons_py = os.path.join('bootstrap', 'src', 'script', 'scons.py')
if not os.path.exists(scons_py):
    scons_py = os.path.join('src', 'script', 'scons.py')

scons_lib_dir = os.path.join(os.getcwd(), 'bootstrap', 'src', 'engine')
if not os.path.exists(scons_lib_dir):
    scons_lib_dir = os.path.join(os.getcwd(), 'src', 'engine')

os.environ['SCONS_LIB_DIR'] = scons_lib_dir

import TestCmd

# The regular expression that identifies entity references in the
# standard sgmllib omits the underscore from the legal characters.
# Override it with our own regular expression that adds underscore.
sgmllib.entityref = re.compile('&([a-zA-Z][-_.a-zA-Z0-9]*)[^-_a-zA-Z0-9]')

# Classes for collecting different types of data we're interested in.
class DataCollector(object):
    """Generic class for collecting data between a start tag and end
    tag.  We subclass for various types of tags we care about."""
    def __init__(self):
        self.data = ""
    def afunc(self, data):
        self.data = self.data + data

class Example(DataCollector):
    """An SCons example.  This is essentially a list of files that
    will get written to a temporary directory to collect output
    from one or more SCons runs."""
    def __init__(self):
        DataCollector.__init__(self)
        self.files = []
        self.dirs = []

class File(DataCollector):
    """A file, that will get written out to a temporary directory
    for one or more SCons runs."""
    def __init__(self, name):
        DataCollector.__init__(self)
        self.name = name

class Directory(DataCollector):
    """A directory, that will get created in a temporary directory
    for one or more SCons runs."""
    def __init__(self, name):
        DataCollector.__init__(self)
        self.name = name

class Output(DataCollector):
    """Where the command output goes.  This is essentially
    a list of commands that will get executed."""
    def __init__(self):
        DataCollector.__init__(self)
        self.commandlist = []

class Command(DataCollector):
    """A tag for where the command output goes.  This is essentially
    a list of commands that will get executed."""
    def __init__(self):
        DataCollector.__init__(self)
        self.output = None

Prompt = {
    'posix' : '% ',
    'win32' : 'C:\\>'
}

# The magick SCons hackery that makes this work.
#
# So that our examples can still use the default SConstruct file, we
# actually feed the following into SCons via stdin and then have it
# SConscript() the SConstruct file.  This stdin wrapper creates a set
# of ToolSurrogates for the tools for the appropriate platform.  These
# Surrogates print output like the real tools and behave like them
# without actually having to be on the right platform or have the right
# tool installed.
#
# The upshot:  The wrapper transparently changes the world out from
# under the top-level SConstruct file in an example just so we can get
# the command output.

Stdin = """\
import os
import re
import SCons.Action
import SCons.Defaults
import SCons.Node.FS

platform = '%(osname)s'

Sep = {
    'posix' : '/',
    'win32' : '\\\\',
}[platform]


#  Slip our own __str__() method into the EntryProxy class used to expand
#  $TARGET{S} and $SOURCE{S} to translate the path-name separators from
#  what's appropriate for the system we're running on to what's appropriate
#  for the example system.
orig = SCons.Node.FS.EntryProxy
class MyEntryProxy(orig):
    def __str__(self):
        return str(self._subject).replace(os.sep, Sep)
SCons.Node.FS.EntryProxy = MyEntryProxy

# Slip our own RDirs() method into the Node.FS.File class so that the
# expansions of $_{CPPINC,F77INC,LIBDIR}FLAGS will have the path-name
# separators translated from what's appropriate for the system we're
# running on to what's appropriate for the example system.
orig_RDirs = SCons.Node.FS.File.RDirs
def my_RDirs(self, pathlist, orig_RDirs=orig_RDirs):
    return [str(x).replace(os.sep, Sep) for x in orig_RDirs(self, pathlist)]
SCons.Node.FS.File.RDirs = my_RDirs

class Curry(object):
    def __init__(self, fun, *args, **kwargs):
        self.fun = fun
        self.pending = args[:]
        self.kwargs = kwargs.copy()

    def __call__(self, *args, **kwargs):
        if kwargs and self.kwargs:
            kw = self.kwargs.copy()
            kw.update(kwargs)
        else:
            kw = kwargs or self.kwargs

        return self.fun(*self.pending + args, **kw)

def Str(target, source, env, cmd=""):
    result = []
    for cmd in env.subst_list(cmd, target=target, source=source):
        result.append(' '.join(map(str, cmd)))
    return '\\n'.join(result)

class ToolSurrogate(object):
    def __init__(self, tool, variable, func, varlist):
        self.tool = tool
        if not isinstance(variable, list):
            variable = [variable]
        self.variable = variable
        self.func = func
        self.varlist = varlist
    def __call__(self, env):
        t = Tool(self.tool)
        t.generate(env)
        for v in self.variable:
            orig = env[v]
            try:
                strfunction = orig.strfunction
            except AttributeError:
                strfunction = Curry(Str, cmd=orig)
            # Don't call Action() through its global function name, because
            # that leads to infinite recursion in trying to initialize the
            # Default Environment.
            env[v] = SCons.Action.Action(self.func,
                                         strfunction=strfunction,
                                         varlist=self.varlist)
    def __repr__(self):
        # This is for the benefit of printing the 'TOOLS'
        # variable through env.Dump().
        return repr(self.tool)

def Null(target, source, env):
    pass

def Cat(target, source, env):
    target = str(target[0])
    f = open(target, "wb")
    for src in map(str, source):
        f.write(open(src, "rb").read())
    f.close()

def CCCom(target, source, env):
    target = str(target[0])
    fp = open(target, "wb")
    def process(source_file, fp=fp):
        for line in open(source_file, "rb").readlines():
            m = re.match(r'#include\s[<"]([^<"]+)[>"]', line)
            if m:
                include = m.group(1)
                for d in [str(env.Dir('$CPPPATH')), '.']:
                    f = os.path.join(d, include)
                    if os.path.exists(f):
                        process(f)
                        break
            elif line[:11] != "STRIP CCCOM":
                fp.write(line)
    for src in map(str, source):
        process(src)
        fp.write('debug = ' + ARGUMENTS.get('debug', '0') + '\\n')
    fp.close()

public_class_re = re.compile('^public class (\S+)', re.MULTILINE)

def JavaCCom(target, source, env):
    # This is a fake Java compiler that just looks for
    #   public class FooBar
    # lines in the source file(s) and spits those out
    # to .class files named after the class.
    tlist = list(map(str, target))
    not_copied = {}
    for t in tlist:
       not_copied[t] = 1
    for src in map(str, source):
        contents = open(src, "rb").read()
        classes = public_class_re.findall(contents)
        for c in classes:
            for t in [x for x in tlist if x.find(c) != -1]:
                open(t, "wb").write(contents)
                del not_copied[t]
    for t in not_copied.keys():
        open(t, "wb").write("\\n")

def JavaHCom(target, source, env):
    tlist = map(str, target)
    slist = map(str, source)
    for t, s in zip(tlist, slist):
        open(t, "wb").write(open(s, "rb").read())

def JarCom(target, source, env):
    target = str(target[0])
    class_files = []
    for src in map(str, source):
        for dirpath, dirnames, filenames in os.walk(src):
            class_files.extend([ os.path.join(dirpath, f)
                                 for f in filenames if f.endswith('.class') ])
    f = open(target, "wb")
    for cf in class_files:
        f.write(open(cf, "rb").read())
    f.close()

# XXX Adding COLOR, COLORS and PACKAGE to the 'cc' varlist(s) by hand
# here is bogus.  It's for the benefit of doc/user/command-line.in, which
# uses examples that want  to rebuild based on changes to these variables.
# It would be better to figure out a way to do it based on the content of
# the generated command-line, or else find a way to let the example markup
# language in doc/user/command-line.in tell this script what variables to
# add, but that's more difficult than I want to figure out how to do right
# now, so let's just use the simple brute force approach for the moment.

ToolList = {
    'posix' :   [('cc', ['CCCOM', 'SHCCCOM'], CCCom, ['CCFLAGS', 'CPPDEFINES', 'COLOR', 'COLORS', 'PACKAGE']),
                 ('link', ['LINKCOM', 'SHLINKCOM'], Cat, []),
                 ('ar', ['ARCOM', 'RANLIBCOM'], Cat, []),
                 ('tar', 'TARCOM', Null, []),
                 ('zip', 'ZIPCOM', Null, []),
                 ('BitKeeper', 'BITKEEPERCOM', Cat, []),
                 ('CVS', 'CVSCOM', Cat, []),
                 ('RCS', 'RCS_COCOM', Cat, []),
                 ('SCCS', 'SCCSCOM', Cat, []),
                 ('javac', 'JAVACCOM', JavaCCom, []),
                 ('javah', 'JAVAHCOM', JavaHCom, []),
                 ('jar', 'JARCOM', JarCom, []),
                 ('rmic', 'RMICCOM', Cat, []),
                ],
    'win32' :   [('msvc', ['CCCOM', 'SHCCCOM', 'RCCOM'], CCCom, ['CCFLAGS', 'CPPDEFINES', 'COLOR', 'COLORS', 'PACKAGE']),
                 ('mslink', ['LINKCOM', 'SHLINKCOM'], Cat, []),
                 ('mslib', 'ARCOM', Cat, []),
                 ('tar', 'TARCOM', Null, []),
                 ('zip', 'ZIPCOM', Null, []),
                 ('BitKeeper', 'BITKEEPERCOM', Cat, []),
                 ('CVS', 'CVSCOM', Cat, []),
                 ('RCS', 'RCS_COCOM', Cat, []),
                 ('SCCS', 'SCCSCOM', Cat, []),
                 ('javac', 'JAVACCOM', JavaCCom, []),
                 ('javah', 'JAVAHCOM', JavaHCom, []),
                 ('jar', 'JARCOM', JarCom, []),
                 ('rmic', 'RMICCOM', Cat, []),
                ],
}

toollist = ToolList[platform]
filter_tools = '%(tools)s'.split()
if filter_tools:
    toollist = [x for x in toollist if x[0] in filter_tools]

toollist = [ToolSurrogate(*t) for t in toollist]

toollist.append('install')

def surrogate_spawn(sh, escape, cmd, args, env):
    pass

def surrogate_pspawn(sh, escape, cmd, args, env, stdout, stderr):
    pass

SCons.Defaults.ConstructionEnvironment.update({
    'PLATFORM' : platform,
    'TOOLS'    : toollist,
    'SPAWN'    : surrogate_spawn,
    'PSPAWN'   : surrogate_pspawn,
})

SConscript('SConstruct')
"""

# "Commands" that we will execute in our examples.
def command_scons(args, c, test, dict):
    save_vals = {}
    delete_keys = []
    try:
        ce = c.environment
    except AttributeError:
        pass
    else:
        for arg in c.environment.split():
            key, val = arg.split('=')
            try:
                save_vals[key] = os.environ[key]
            except KeyError:
                delete_keys.append(key)
            os.environ[key] = val
    test.run(interpreter = sys.executable,
             program = scons_py,
             # We use ToolSurrogates to capture win32 output by "building"
             # examples using a fake win32 tool chain.  Suppress the
             # warnings that come from the new revamped VS support so
             # we can build doc on (Linux) systems that don't have
             # Visual C installed.
             arguments = '--warn=no-visual-c-missing -f - ' + ' '.join(args),
             chdir = test.workpath('WORK'),
             stdin = Stdin % dict)
    os.environ.update(save_vals)
    for key in delete_keys:
        del(os.environ[key])
    out = test.stdout()
    out = out.replace(test.workpath('ROOT'), '')
    out = out.replace(test.workpath('WORK/SConstruct'),
                              '/home/my/project/SConstruct')
    lines = out.split('\n')
    if lines:
        while lines[-1] == '':
            lines = lines[:-1]
    #err = test.stderr()
    #if err:
    #    sys.stderr.write(err)
    return lines

def command_touch(args, c, test, dict):
    if args[0] == '-t':
        t = int(time.mktime(time.strptime(args[1], '%Y%m%d%H%M')))
        times = (t, t)
        args = args[2:]
    else:
        time.sleep(1)
        times = None
    for file in args:
        if not os.path.isabs(file):
            file = os.path.join(test.workpath('WORK'), file)
        if not os.path.exists(file):
            open(file, 'wb')
        os.utime(file, times)
    return []

def command_edit(args, c, test, dict):
    try:
        add_string = c.edit[:]
    except AttributeError:
        add_string = 'void edit(void) { ; }\n'
    if add_string[-1] != '\n':
        add_string = add_string + '\n'
    for file in args:
        if not os.path.isabs(file):
            file = os.path.join(test.workpath('WORK'), file)
        contents = open(file, 'rb').read()
        open(file, 'wb').write(contents + add_string)
    return []

def command_ls(args, c, test, dict):
    def ls(a):
        return ['  '.join(sorted([x for x in os.listdir(a) if x[0] != '.']))]
    if args:
        l = []
        for a in args:
            l.extend(ls(test.workpath('WORK', a)))
        return l
    else:
        return ls(test.workpath('WORK'))

def command_sleep(args, c, test, dict):
    time.sleep(int(args[0]))

CommandDict = {
    'scons' : command_scons,
    'touch' : command_touch,
    'edit'  : command_edit,
    'ls'    : command_ls,
    'sleep' : command_sleep,
}

def ExecuteCommand(args, c, t, dict):
    try:
        func = CommandDict[args[0]]
    except KeyError:
        func = lambda args, c, t, dict: []
    return func(args[1:], c, t, dict)

class MySGML(sgmllib.SGMLParser):
    """A subclass of the standard Python sgmllib SGML parser.

    This extends the standard sgmllib parser to recognize, and do cool
    stuff with, the added tags that describe our SCons examples,
    commands, and other stuff.
    """
    def __init__(self, outfp):
        sgmllib.SGMLParser.__init__(self)
        self.examples = {}
        self.afunclist = []
        self.outfp = outfp

    # The first set of methods here essentially implement pass-through
    # handling of most of the stuff in an SGML file.  We're really
    # only concerned with the tags specific to SCons example processing,
    # the methods for which get defined below.

    def handle_data(self, data):
        try:
            f = self.afunclist[-1]
        except IndexError:
            self.outfp.write(data)
        else:
            f(data)

    def handle_comment(self, data):
        self.outfp.write('<!--' + data + '-->')

    def handle_decl(self, data):
        self.outfp.write('<!' + data + '>')

    def unknown_starttag(self, tag, attrs):
        try:
            f = self.example.afunc
        except AttributeError:
            f = self.outfp.write
        if not attrs:
            f('<' + tag + '>')
        else:
            f('<' + tag)
            for name, value in attrs:
                f(' ' + name + '=' + '"' + value + '"')
            f('>')

    def unknown_endtag(self, tag):
        self.outfp.write('</' + tag + '>')

    def unknown_entityref(self, ref):
        self.outfp.write('&' + ref + ';')

    def unknown_charref(self, ref):
        self.outfp.write('&#' + ref + ';')

    # Here is where the heavy lifting begins.  The following methods
    # handle the begin-end tags of our SCons examples.

    def for_display(self, contents):
        contents = contents.replace('__ROOT__', '')
        contents = contents.replace('<', '&lt;')
        contents = contents.replace('>', '&gt;')
        return contents

    def start_scons_example(self, attrs):
        t = [t for t in attrs if t[0] == 'name']
        if t:
            name = t[0][1]
            try:
               e = self.examples[name]
            except KeyError:
               e = self.examples[name] = Example()
        else:
            e = Example()
        for name, value in attrs:
            setattr(e, name, value)
        self.e = e
        self.afunclist.append(e.afunc)

    def end_scons_example(self):
        e = self.e
        files = [f for f in e.files if f.printme]
        if files:
            self.outfp.write('<programlisting>')
            for f in files:
                if f.printme:
                    i = len(f.data) - 1
                    while f.data[i] == ' ':
                        i = i - 1
                    output = self.for_display(f.data[:i+1])
                    self.outfp.write(output)
            if e.data and e.data[0] == '\n':
                e.data = e.data[1:]
            self.outfp.write(e.data + '</programlisting>')
        delattr(self, 'e')
        self.afunclist = self.afunclist[:-1]

    def start_file(self, attrs):
        try:
            e = self.e
        except AttributeError:
            self.error("<file> tag outside of <scons_example>")
        t = [t for t in attrs if t[0] == 'name']
        if not t:
            self.error("no <file> name attribute found")
        try:
            e.prefix
        except AttributeError:
            e.prefix = e.data
            e.data = ""
        f = File(t[0][1])
        f.printme = None
        for name, value in attrs:
            setattr(f, name, value)
        e.files.append(f)
        self.afunclist.append(f.afunc)

    def end_file(self):
        self.e.data = ""
        self.afunclist = self.afunclist[:-1]

    def start_directory(self, attrs):
        try:
            e = self.e
        except AttributeError:
            self.error("<directory> tag outside of <scons_example>")
        t = [t for t in attrs if t[0] == 'name']
        if not t:
            self.error("no <directory> name attribute found")
        try:
            e.prefix
        except AttributeError:
            e.prefix = e.data
            e.data = ""
        d = Directory(t[0][1])
        for name, value in attrs:
            setattr(d, name, value)
        e.dirs.append(d)
        self.afunclist.append(d.afunc)

    def end_directory(self):
        self.e.data = ""
        self.afunclist = self.afunclist[:-1]

    def start_scons_example_file(self, attrs):
        t = [t for t in attrs if t[0] == 'example']
        if not t:
            self.error("no <scons_example_file> example attribute found")
        exname = t[0][1]
        try:
            e = self.examples[exname]
        except KeyError:
            self.error("unknown example name '%s'" % exname)
        fattrs = [t for t in attrs if t[0] == 'name']
        if not fattrs:
            self.error("no <scons_example_file> name attribute found")
        fname = fattrs[0][1]
        f = [f for f in e.files if f.name == fname]
        if not f:
            self.error("example '%s' does not have a file named '%s'" % (exname, fname))
        self.f = f[0]

    def end_scons_example_file(self):
        f = self.f
        self.outfp.write('<programlisting>')
        self.outfp.write(f.data + '</programlisting>')
        delattr(self, 'f')

    def start_scons_output(self, attrs):
        t = [t for t in attrs if t[0] == 'example']
        if not t:
            self.error("no <scons_output> example attribute found")
        exname = t[0][1]
        try:
            e = self.examples[exname]
        except KeyError:
            self.error("unknown example name '%s'" % exname)
        # Default values for an example.
        o = Output()
        o.preserve = None
        o.os = 'posix'
        o.tools = ''
        o.e = e
        # Locally-set.
        for name, value in attrs:
            setattr(o, name, value)
        self.o = o
        self.afunclist.append(o.afunc)

    def end_scons_output(self):
        # The real raison d'etre for this script, this is where we
        # actually execute SCons to fetch the output.
        o = self.o
        e = o.e
        t = TestCmd.TestCmd(workdir='', combine=1)
        if o.preserve:
            t.preserve()
        t.subdir('ROOT', 'WORK')
        t.rootpath = t.workpath('ROOT').replace('\\', '\\\\')

        for d in e.dirs:
            dir = t.workpath('WORK', d.name)
            if not os.path.exists(dir):
                os.makedirs(dir)

        for f in e.files:
            i = 0
            while f.data[i] == '\n':
                i = i + 1
            lines = f.data[i:].split('\n')
            i = 0
            while lines[0][i] == ' ':
                i = i + 1
            lines = [l[i:] for l in lines]
            path = f.name.replace('__ROOT__', t.rootpath)
            if not os.path.isabs(path):
                path = t.workpath('WORK', path)
            dir, name = os.path.split(path)
            if dir and not os.path.exists(dir):
                os.makedirs(dir)
            content = '\n'.join(lines)
            content = content.replace('__ROOT__', t.rootpath)
            path = t.workpath('WORK', path)
            t.write(path, content)
            if hasattr(f, 'chmod'):
                os.chmod(path, int(f.chmod, 0))

        i = len(o.prefix)
        while o.prefix[i-1] != '\n':
            i = i - 1

        self.outfp.write('<screen>' + o.prefix[:i])
        p = o.prefix[i:]

        # Regular expressions for making the doc output consistent,
        # regardless of reported addresses or Python version.

        # Massage addresses in object repr strings to a constant.
        address_re = re.compile(r' at 0x[0-9a-fA-F]*\>')

        # Massage file names in stack traces (sometimes reported as absolute
        # paths) to a consistent relative path.
        engine_re = re.compile(r' File ".*/src/engine/SCons/')

        # Python 2.5 changed the stack trace when the module is read
        # from standard input from read "... line 7, in ?" to
        # "... line 7, in <module>".
        file_re = re.compile(r'^( *File ".*", line \d+, in) \?$', re.M)

        # Python 2.6 made UserList a new-style class, which changes the
        # AttributeError message generated by our NodeList subclass.
        nodelist_re = re.compile(r'(AttributeError:) NodeList instance (has no attribute \S+)')

        for c in o.commandlist:
            self.outfp.write(p + Prompt[o.os])
            d = c.data.replace('__ROOT__', '')
            self.outfp.write('<userinput>' + d + '</userinput>\n')

            e = c.data.replace('__ROOT__', t.workpath('ROOT'))
            args = e.split()
            lines = ExecuteCommand(args, c, t, {'osname':o.os, 'tools':o.tools})
            content = None
            if c.output:
                content = c.output
            elif lines:
                content = ( '\n' + p).join(lines)
            if content:
                content = address_re.sub(r' at 0x700000&gt;', content)
                content = engine_re.sub(r' File "bootstrap/src/engine/SCons/', content)
                content = file_re.sub(r'\1 <module>', content)
                content = nodelist_re.sub(r"\1 'NodeList' object \2", content)
                content = self.for_display(content)
                self.outfp.write(p + content + '\n')

        if o.data[0] == '\n':
            o.data = o.data[1:]
        self.outfp.write(o.data + '</screen>')
        delattr(self, 'o')
        self.afunclist = self.afunclist[:-1]

    def start_scons_output_command(self, attrs):
        try:
            o = self.o
        except AttributeError:
            self.error("<scons_output_command> tag outside of <scons_output>")
        try:
            o.prefix
        except AttributeError:
            o.prefix = o.data
            o.data = ""
        c = Command()
        for name, value in attrs:
            setattr(c, name, value)
        o.commandlist.append(c)
        self.afunclist.append(c.afunc)

    def end_scons_output_command(self):
        self.o.data = ""
        self.afunclist = self.afunclist[:-1]

    def start_sconstruct(self, attrs):
        f = File('')
        self.f = f
        self.afunclist.append(f.afunc)

    def end_sconstruct(self):
        f = self.f
        self.outfp.write('<programlisting>')
        output = self.for_display(f.data)
        self.outfp.write(output + '</programlisting>')
        delattr(self, 'f')
        self.afunclist = self.afunclist[:-1]

def process(filename, fout=sys.stdout):
    if filename == '-':
        f = sys.stdin
    else:
        try:
            f = open(filename, 'r')
        except EnvironmentError, e:
            sys.stderr.write('%s: %s\n' % (filename, e))
            return 1

    data = f.read()
    if f is not sys.stdin:
        f.close()

    if data.startswith('<?xml '):
        first_line, data = data.split('\n', 1)
        fout.write(first_line + '\n')

    x = MySGML(fout)
    for c in data:
        x.feed(c)
    x.close()

    return 0

def main(argv=None):
    if argv is None:
        argv = sys.argv

    parser = optparse.OptionParser()
    parser.add_option('-d', '--diff',
                  action='store_true', dest='diff', default=False,
                  help='create examples for the .in file and output a unified diff against the related .xml file')
    parser.add_option('-r', '--run',
                  action='store_true', dest='run', default=False,
                  help='create examples for the .in file, but do not change any files')
    parser.add_option('-s', '--simple_diff',
                  action='store_true', dest='simple', default=False,
                  help='use a simpler output for the diff mode (no unified diff!)')
    parser.add_option('-u', '--update',
                  action='store_true', dest='update', default=False,
                  help='create examples for the .in file and update the related .xml file')

    opts, args = parser.parse_args(argv[1:])

    if opts.diff:
        import StringIO
        import difflib
        
        if not args:
            args = glob.glob('doc/user/*.in')
        for arg in sorted(args):
            diff = None
            s = StringIO.StringIO()
            process(arg,s)
            filename = arg[:-2]+'xml'
            try:
                fxml = open(filename, 'r')
                xmlcontent = fxml.read()
                fxml.close()
                if opts.simple:
                    diff = list(difflib.context_diff(xmlcontent.splitlines(),
                                                     s.getvalue().splitlines(),
                                                     fromfile=arg, tofile=filename))
                else:
                    diff = list(difflib.unified_diff(xmlcontent.splitlines(),
                                                     s.getvalue().splitlines(),
                                                     fromfile=arg, tofile=filename, 
                                                     lineterm=''))
            except EnvironmentError, e:
                sys.stderr.write('%s: %s\n' % (filename, e))
                
            s.close()
            if diff:
                print "%s:" % arg
                print '\n'.join(diff)
    elif opts.run:
        if not args:
            args = glob.glob('doc/user/*.in')
        for arg in sorted(args):
            print "%s:" % arg
            process(arg)
    elif opts.update:
        if not args:
            args = glob.glob('doc/user/*.in')
        for arg in sorted(args):
            print "%s:" % arg
            filename = arg[:-2]+'xml'
            try:
                fxml = open(filename, 'w')
                process(arg, fxml)
                fxml.close()
            except EnvironmentError, e:
                sys.stderr.write('%s: %s\n' % (filename, e))
    else:
        if not args:
            args = ['-']
    
        for arg in args:
            process(arg)

if __name__ == "__main__":
    sys.exit(main())

# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4: