/
meta.py
777 lines (657 loc) · 22.8 KB
/
meta.py
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
# -*- coding: utf-8 -*-
"""
Contains classes and utilities related to meta data in hyde.
"""
from collections import namedtuple
from functools import partial
from operator import attrgetter
import re
import sys
from hyde._compat import basestring, filter, iteritems, str
from hyde.exceptions import HydeException
from hyde.model import Expando
from hyde.plugin import Plugin
from hyde.site import Node, Resource
from hyde.util import add_method, add_property, pairwalk
from fswrap import File, Folder
import yaml
#
# Metadata
#
class Metadata(Expando):
"""
Container class for yaml meta data.
"""
def __init__(self, data, parent=None):
super(Metadata, self).__init__({})
if parent:
self.update(parent.__dict__)
if data:
self.update(data)
def update(self, data):
"""
Updates the metadata with new stuff
"""
if isinstance(data, basestring):
super(Metadata, self).update(yaml.load(data))
else:
super(Metadata, self).update(data)
class MetaPlugin(Plugin):
"""
Metadata plugin for hyde. Loads meta data in the following order:
1. meta.yaml: files in any folder
2. frontmatter: any text file with content enclosed within three
dashes or three equals signs.
Example::
---
abc: def
---
Supports YAML syntax.
"""
def __init__(self, site):
super(MetaPlugin, self).__init__(site)
self.yaml_finder = re.compile(
r"^\s*(?:---|===)\s*\n((?:.|\n)+?)\n\s*(?:---|===)\s*\n*",
re.MULTILINE)
def begin_site(self):
"""
Initialize site meta data.
Go through all the nodes and resources to initialize
meta data at each level.
"""
config = self.site.config
metadata = config.meta if hasattr(config, 'meta') else {}
self.site.meta = Metadata(metadata)
self.nodemeta = 'nodemeta.yaml'
if hasattr(self.site.meta, 'nodemeta'):
self.nodemeta = self.site.meta.nodemeta
for node in self.site.content.walk():
self.__read_node__(node)
for resource in node.resources:
if not hasattr(resource, 'meta'):
resource.meta = Metadata({}, node.meta)
if resource.source_file.is_text and not resource.simple_copy:
self.__read_resource__(
resource, resource.source_file.read_all())
def __read_resource__(self, resource, text):
"""
Reads the resource metadata and assigns it to
the resource. Load meta data by looking for the marker.
Once loaded, remove the meta area from the text.
"""
self.logger.debug(
"Trying to load metadata from resource [%s]" % resource)
match = re.match(self.yaml_finder, text)
if not match:
self.logger.debug("No metadata found in resource [%s]" % resource)
data = {}
else:
text = text[match.end():]
data = match.group(1)
if not hasattr(resource, 'meta') or not resource.meta:
if not hasattr(resource.node, 'meta'):
resource.node.meta = Metadata({})
resource.meta = Metadata(data, resource.node.meta)
else:
resource.meta.update(data)
self.__update_standard_attributes__(resource)
self.logger.debug("Successfully loaded metadata from resource [%s]"
% resource)
return text or ' '
def __update_standard_attributes__(self, obj):
"""
Updates standard attributes on the resource and
page based on the provided meta data.
"""
if not hasattr(obj, 'meta'):
return
standard_attributes = ['is_processable', 'uses_template']
for attr in standard_attributes:
if hasattr(obj.meta, attr):
setattr(obj, attr, getattr(obj.meta, attr))
def __read_node__(self, node):
"""
Look for nodemeta.yaml (or configured name). Load and assign it
to the node.
"""
nodemeta = node.get_resource(self.nodemeta)
parent_meta = node.parent.meta if node.parent else self.site.meta
if nodemeta:
nodemeta.is_processable = False
metadata = nodemeta.source_file.read_all()
if hasattr(node, 'meta') and node.meta:
node.meta.update(metadata)
else:
node.meta = Metadata(metadata, parent=parent_meta)
else:
node.meta = Metadata({}, parent=parent_meta)
self.__update_standard_attributes__(node)
def begin_node(self, node):
"""
Read node meta data.
"""
self.__read_node__(node)
def begin_text_resource(self, resource, text):
"""
Update the meta data again, just in case it
has changed. Return text without meta data.
"""
return self.__read_resource__(resource, text)
#
# Auto Extend
#
class AutoExtendPlugin(Plugin):
"""
The plugin class for extending templates using metadata.
"""
def __init__(self, site):
super(AutoExtendPlugin, self).__init__(site)
def begin_text_resource(self, resource, text):
"""
If the meta data for the resource contains a layout attribute,
and there is no extends statement, this plugin automatically adds
an extends statement to the top of the file.
"""
if not resource.uses_template:
return text
layout = None
block = None
try:
layout = resource.meta.extends
except AttributeError:
pass
try:
block = resource.meta.default_block
except AttributeError:
pass
if layout:
self.logger.debug("Autoextending %s with %s" % (
resource.relative_path, layout))
extends_pattern = self.template.patterns['extends']
if not re.search(extends_pattern, text):
extended_text = self.template.get_extends_statement(layout)
extended_text += '\n'
if block:
extended_text += ('%s\n%s\n%s' %
(self.t_block_open_tag(block),
text,
self.t_block_close_tag(block)))
else:
extended_text += text
return extended_text
return text
#
# Tagging
#
class Tag(Expando):
"""
A simple object that represents a tag.
"""
def __init__(self, name):
"""
Initialize the tag with a name.
"""
self.name = name
self.resources = []
def __repr__(self):
return self.name
def __str__(self):
return self.name
def get_tagger_sort_method(site):
config = site.config
content = site.content
walker = 'walk_resources'
sorter = None
try:
sorter = attrgetter('tagger.sorter')(config)
walker = walker + '_sorted_by_%s' % sorter
except AttributeError:
pass
try:
walker = getattr(content, walker)
except AttributeError:
HydeException.reraise(
"Cannot find the sorter: %s" % sorter,
sys.exc_info())
return walker
def walk_resources_tagged_with(node, tag):
tags = set(str(tag).split('+'))
walker = get_tagger_sort_method(node.site)
for resource in walker():
try:
taglist = set(attrgetter("meta.tags")(resource))
except AttributeError:
continue
if tags <= taglist:
yield resource
class TaggerPlugin(Plugin):
"""
Tagger plugin for hyde. Adds the ability to do tag resources and search
based on the tags.
Configuration example
---------------------
#yaml
sorter:
kind:
attr: source.kind
tagger:
sorter: kind # How to sort the resources in a tag
archives:
blog:
template: tagged_posts.j2
source: blog
target: blog/tags
archive_extension: html
"""
def __init__(self, site):
super(TaggerPlugin, self).__init__(site)
def begin_site(self):
"""
Initialize plugin. Add tag to the site context variable
and methods for walking tagged resources.
"""
self.logger.debug("Adding tags from metadata")
# *F841 local variable 'config' is assigned to but never used
# config = self.site.config
# *F841 local variable 'content' is assigned to but never used
# content = self.site.content
tags = {}
add_method(Node,
'walk_resources_tagged_with', walk_resources_tagged_with)
walker = get_tagger_sort_method(self.site)
for resource in walker():
self._process_tags_in_resource(resource, tags)
self._process_tag_metadata(tags)
self.site.tagger = Expando(dict(tags=tags))
self._generate_archives()
def _process_tag_metadata(self, tags):
"""
Parses and adds metadata to the tagger object, if the tagger
configuration contains metadata.
"""
try:
tag_meta = self.site.config.tagger.tags.to_dict()
except AttributeError:
tag_meta = {}
for tagname, meta in iteritems(tag_meta):
# Don't allow name and resources in meta
if 'resources' in meta:
del(meta['resources'])
if 'name' in meta:
del(meta['name'])
if tagname in tags:
tags[tagname].update(meta)
def _process_tags_in_resource(self, resource, tags):
"""
Reads the tags associated with this resource and
adds them to the tag list if needed.
"""
try:
taglist = attrgetter("meta.tags")(resource)
except AttributeError:
return
for tagname in taglist:
if tagname not in tags:
tag = Tag(tagname)
tags[tagname] = tag
tag.resources.append(resource)
add_method(Node,
'walk_resources_tagged_with_%s' % tagname,
walk_resources_tagged_with,
tag=tag)
else:
tags[tagname].resources.append(resource)
if not hasattr(resource, 'tags'):
setattr(resource, 'tags', [])
resource.tags.append(tags[tagname])
def _generate_archives(self):
"""
Generates archives if the configuration demands.
"""
archive_config = None
try:
archive_config = attrgetter("tagger.archives")(self.site.config)
except AttributeError:
return
self.logger.debug("Generating archives for tags")
for name, config in iteritems(archive_config.to_dict()):
self._create_tag_archive(config)
def _create_tag_archive(self, config):
"""
Generates archives for each tag based on the given configuration.
"""
if 'template' not in config:
raise HydeException(
"No Template specified in tagger configuration.")
content = self.site.content.source_folder
source = Folder(config.get('source', ''))
target = content.child_folder(config.get('target', 'tags'))
if not target.exists:
target.make()
# Write meta data for the configuration
meta = config.get('meta', {})
meta_text = u''
if meta:
import yaml
meta_text = yaml.dump(meta, default_flow_style=False)
extension = config.get('extension', 'html')
template = config['template']
archive_text = u"""
---
extends: false
%(meta)s
---
{%% set tag = site.tagger.tags['%(tag)s'] %%}
{%% set source = site.content.node_from_relative_path('%(node)s') %%}
{%% set walker = source['walk_resources_tagged_with_%(tag)s'] %%}
{%% extends "%(template)s" %%}
"""
for tagname, tag in iteritems(self.site.tagger.tags.to_dict()):
tag_data = {
"tag": tagname,
"node": source.name,
"template": template,
"meta": meta_text
}
text = archive_text % tag_data
archive_file = File(target.child("%s.%s" % (tagname, extension)))
archive_file.delete()
archive_file.write(text.strip())
self.site.content.add_resource(archive_file)
#
# Sorting
#
def filter_method(item, settings=None):
"""
Returns true if all the filters in the
given settings evaluate to True.
"""
all_match = True
default_filters = {}
filters = {}
if hasattr(settings, 'filters'):
filters.update(default_filters)
filters.update(settings.filters.__dict__)
for field, value in filters.items():
try:
res = attrgetter(field)(item)
except:
res = None
if res != value:
all_match = False
break
return all_match
def attributes_checker(item, attributes=None):
"""
Checks if the given list of attributes exist.
"""
try:
attrgetter(*attributes)(item)
return True
except AttributeError:
return False
def sort_method(node, settings=None):
"""
Sorts the resources in the given node based on the
given settings.
"""
attr = 'name'
if settings and hasattr(settings, 'attr') and settings.attr:
attr = settings.attr
reverse = False
if settings and hasattr(settings, 'reverse'):
reverse = settings.reverse
if not isinstance(attr, list):
attr = [attr]
filter_ = partial(filter_method, settings=settings)
excluder_ = partial(attributes_checker, attributes=attr)
resources = filter(lambda x: excluder_(x) and filter_(x),
node.walk_resources())
return sorted(resources,
key=attrgetter(*attr),
reverse=reverse)
class SorterPlugin(Plugin):
"""
Sorter plugin for hyde. Adds the ability to do
sophisticated sorting by expanding the site objects
to support prebuilt sorting methods. These methods
can be used in the templates directly.
Configuration example::
#yaml
sorter:
kind:
# Sorts by this attribute name
# Uses `attrgetter` on the resource object
attr: source_file.kind
# The filters to be used before sorting
# This can be used to remove all the items
# that do not apply. For example,
# filtering non html content
filters:
source_file.kind: html
is_processable: True
meta.is_listable: True
"""
def __init__(self, site):
super(SorterPlugin, self).__init__(site)
def begin_site(self):
"""
Initialize plugin. Add a sort and match method
for every configuration mentioned in site settings
"""
config = self.site.config
if not hasattr(config, 'sorter'):
return
for name, settings in config.sorter.__dict__.items():
sort_method_name = 'walk_resources_sorted_by_%s' % name
self.logger.debug("Adding sort methods for [%s]" % name)
add_method(Node, sort_method_name, sort_method, settings=settings)
match_method_name = 'is_%s' % name
add_method(Resource, match_method_name, filter_method, settings)
prev_att = 'prev_by_%s' % name
next_att = 'next_by_%s' % name
setattr(Resource, prev_att, None)
setattr(Resource, next_att, None)
walker = getattr(self.site.content,
sort_method_name,
self.site.content.walk_resources)
first, last = None, None
for prev, next in pairwalk(walker()):
if not first:
first = prev
last = next
setattr(prev, next_att, next)
setattr(next, prev_att, prev)
try:
circular = settings.circular
except AttributeError:
circular = False
if circular and first:
setattr(first, prev_att, last)
setattr(last, next_att, first)
#
# Grouping
#
Grouper = namedtuple('Grouper', 'group resources')
class Group(Expando):
"""
A wrapper class for groups. Adds methods for
grouping resources.
"""
def __init__(self, grouping, parent=None):
self.name = 'groups'
self.parent = parent
self.root = self
self.root = parent.root if parent else self
self.groups = []
self.sorter = getattr(grouping, 'sorter', None)
if hasattr(parent, 'sorter'):
self.sorter = parent.sorter
super(Group, self).__init__(grouping)
add_method(Node,
'walk_%s_groups' % self.name,
Group.walk_groups_in_node,
group=self)
add_method(Node,
'walk_resources_grouped_by_%s' % self.name,
Group.walk_resources,
group=self)
add_property(Resource,
'%s_group' % self.name,
Group.get_resource_group,
group=self)
add_method(Resource,
'walk_%s_groups' % self.name,
Group.walk_resource_groups,
group=self)
def set_expando(self, key, value):
"""
If the key is groups, creates group objects instead of
regular expando objects.
"""
if key == "groups":
self.groups = [Group(group, parent=self) for group in value]
else:
return super(Group, self).set_expando(key, value)
@staticmethod
def get_resource_group(resource, group):
"""
This method gets attached to the resource object.
Returns group and its ancestors that the resource
belongs to, in that order.
"""
try:
group_name = getattr(resource.meta, group.root.name)
except AttributeError:
group_name = None
return next((g for g in group.walk_groups()
if g.name == group_name), None) \
if group_name \
else None
@staticmethod
def walk_resource_groups(resource, group):
"""
This method gets attached to the resource object.
Returns group and its ancestors that the resource
belongs to, in that order.
"""
try:
group_name = getattr(resource.meta, group.root.name)
except AttributeError:
group_name = None
if group_name:
for g in group.walk_groups():
if g.name == group_name:
return reversed(list(g.walk_hierarchy()))
return []
@staticmethod
def walk_resources(node, group):
"""
The method that gets attached to the node
object for walking the resources in the node
that belong to this group.
"""
for group in group.walk_groups():
for resource in group.walk_resources_in_node(node):
yield resource
@staticmethod
def walk_groups_in_node(node, group):
"""
The method that gets attached to the node
object for walking the groups in the node.
"""
walker = group.walk_groups()
for g in walker:
lister = g.walk_resources_in_node(node)
yield Grouper(group=g, resources=lister)
def walk_hierarchy(self):
"""
Walks the group hierarchy starting from
this group.
"""
g = self
yield g
while g.parent:
yield g.parent
g = g.parent
def walk_groups(self):
"""
Walks the groups in the current group
"""
yield self
for group in self.groups:
for child in group.walk_groups():
yield child
def walk_resources_in_node(self, node):
"""
Walks the resources in the given node
sorted based on sorter configuration in this
group.
"""
walker = 'walk_resources'
if hasattr(self, 'sorter') and self.sorter:
walker = 'walk_resources_sorted_by_' + self.sorter
walker = getattr(node, walker, getattr(node, 'walk_resources'))
for resource in walker():
try:
group_value = getattr(resource.meta, self.root.name)
except AttributeError:
continue
if group_value == self.name:
yield resource
class GrouperPlugin(Plugin):
"""
Grouper plugin for hyde. Adds the ability to do
group resources and nodes in an arbitrary
hierarchy.
Configuration example
---------------------
#yaml
sorter:
kind:
attr: source.kind
grouper:
hyde:
# Categorizes the nodes and resources
# based on the groups specified here.
# The node and resource should be tagged
# with the categories in their metadata
sorter: kind # A reference to the sorter
description: Articles about hyde
groups:
-
name: announcements
description: Hyde release announcements
-
name: making of
description: Articles about hyde design decisions
-
name: tips and tricks
description: >
Helpful snippets and tweaks to
make hyde more awesome.
"""
def __init__(self, site):
super(GrouperPlugin, self).__init__(site)
def begin_site(self):
"""
Initialize plugin. Add the specified groups to the
site context variable.
"""
config = self.site.config
if not hasattr(config, 'grouper'):
return
if not hasattr(self.site, 'grouper'):
self.site.grouper = {}
for name, grouping in self.site.config.grouper.__dict__.items():
grouping.name = name
prev_att = 'prev_in_%s' % name
next_att = 'next_in_%s' % name
setattr(Resource, prev_att, None)
setattr(Resource, next_att, None)
self.site.grouper[name] = Group(grouping)
walker = Group.walk_resources(
self.site.content, self.site.grouper[name])
for prev, next in pairwalk(walker):
setattr(next, prev_att, prev)
setattr(prev, next_att, next)