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annotate piecrust/data/assetor.py @ 290:9f3fc17e71e1

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data: Temporary hack for asset URLs.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 05 Mar 2015 01:11:43 -0800
parents 0445a2232de7
children 422052d2e978
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1 import os
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2 import os.path
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3 import logging
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4 from piecrust.uriutil import multi_replace
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7 logger = logging.getLogger(__name__)
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10 class UnsupportedAssetsError(Exception):
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11 pass
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14 def build_base_url(app, uri, rel_assets_path):
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15 base_url_format = app.env.base_asset_url_format
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16 rel_assets_path = rel_assets_path.replace('\\', '/')
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17
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18 # Remove any extension since we'll be copying assets into the 1st
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19 # sub-page's folder.
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20 pretty = app.config.get('site/pretty_urls')
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21 if not pretty:
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22 uri, _ = os.path.splitext(uri)
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24 base_url = multi_replace(
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25 base_url_format,
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26 {
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27 '%path%': rel_assets_path,
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28 '%uri%': uri})
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29 # TEMP HACK
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30 # TODO: looks like we can get here with differently formatted URLs... :(
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31 return app.config.get('site/root') + base_url.strip('/') + '/'
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33
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34 class Assetor(object):
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35 ASSET_DIR_SUFFIX = '-assets'
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36
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37 debug_render_doc = """Helps render URLs to files in the current page's
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38 asset folder."""
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39 debug_render = []
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40 debug_render_dynamic = ['_debugRenderAssetNames']
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41
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42 def __init__(self, page, uri):
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43 self._page = page
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44 self._uri = uri
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45 self._cache = None
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46
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47 def __getattr__(self, name):
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48 try:
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49 self._cacheAssets()
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50 return self._cache[name][0]
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51 except KeyError:
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52 raise AttributeError()
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53
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54 def __getitem__(self, key):
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55 self._cacheAssets()
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56 return self._cache[key][0]
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57
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58 def __iter__(self):
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59 self._cacheAssets()
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60 return map(lambda i: i[0], self._cache.values())
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61
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62 def _debugRenderAssetNames(self):
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63 self._cacheAssets()
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64 return list(self._cache.keys())
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65
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66 def _cacheAssets(self):
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67 if self._cache is not None:
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68 return
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70 self._cache = {}
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71 name, ext = os.path.splitext(self._page.path)
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72 assets_dir = name + Assetor.ASSET_DIR_SUFFIX
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73 if not os.path.isdir(assets_dir):
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74 return
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75
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76 rel_assets_dir = os.path.relpath(assets_dir, self._page.app.root_dir)
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77 base_url = build_base_url(self._page.app, self._uri, rel_assets_dir)
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78 for fn in os.listdir(assets_dir):
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79 full_fn = os.path.join(assets_dir, fn)
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80 if not os.path.isfile(full_fn):
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81 raise Exception("Skipping: %s" % full_fn)
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82 continue
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84 name, ext = os.path.splitext(fn)
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85 if name in self._cache:
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86 raise UnsupportedAssetsError(
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87 "Multiple asset files are named '%s'." % name)
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88 self._cache[name] = (base_url + fn, full_fn)
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89
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90 cpi = self._page.app.env.exec_info_stack.current_page_info
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91 if cpi is not None:
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92 used_assets = list(map(lambda i: i[1], self._cache.values()))
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93 cpi.render_ctx.used_assets = used_assets
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94