Mercurial > piecrust2

annotate piecrust/data/assetor.py @ 78:c80a3be091da 2.0.0-alpha3

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Merge changes.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 30 Aug 2014 17:37:46 -0700
parents 62c7a97c8340
children 0445a2232de7
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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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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 return base_url.rstrip('/') + '/'
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31
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32 class Assetor(object):
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33 ASSET_DIR_SUFFIX = '-assets'
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35 debug_render_doc = """Helps render URLs to files in the current page's
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36 asset folder."""
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37 debug_render = []
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38 debug_render_dynamic = ['_debugRenderAssetNames']
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39
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40 def __init__(self, page, uri):
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41 self._page = page
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42 self._uri = uri
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43 self._cache = None
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44
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45 def __getattr__(self, name):
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46 try:
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47 self._cacheAssets()
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48 return self._cache[name][0]
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49 except KeyError:
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50 raise AttributeError()
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51
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52 def __getitem__(self, key):
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53 self._cacheAssets()
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54 return self._cache[key][0]
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56 def __iter__(self):
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57 self._cacheAssets()
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58 return map(lambda i: i[0], self._cache.values())
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59
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60 def _getAssetPaths(self):
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61 self._cacheAssets()
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62 return map(lambda i: i[1], self._cache.values())
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63
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64 def _debugRenderAssetNames(self):
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65 self._cacheAssets()
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66 return list(self._cache.keys())
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67
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68 def _cacheAssets(self):
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69 if self._cache is not None:
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70 return
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71
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72 self._cache = {}
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73 name, ext = os.path.splitext(self._page.path)
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74 assets_dir = name + Assetor.ASSET_DIR_SUFFIX
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75 if not os.path.isdir(assets_dir):
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76 return
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78 rel_assets_dir = os.path.relpath(assets_dir, self._page.app.root_dir)
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79 base_url = build_base_url(self._page.app, self._uri, rel_assets_dir)
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80 for fn in os.listdir(assets_dir):
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81 full_fn = os.path.join(assets_dir, fn)
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82 if not os.path.isfile(full_fn):
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83 raise Exception("Skipping: %s" % full_fn)
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84 continue
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86 name, ext = os.path.splitext(fn)
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87 if name in self._cache:
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88 raise UnsupportedAssetsError(
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89 "Multiple asset files are named '%s'." % name)
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90 self._cache[name] = (base_url + fn, full_fn)
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91
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92 cpi = self._page.app.env.exec_info_stack.current_page_info
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93 if cpi is not None:
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94 cpi.render_ctx.used_assets = self
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95