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annotate piecrust/data/assetor.py @ 147:ab6e7e0e9d44

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Pass date information to routing when building URLs. This is so that URLs with dates in them can be built even when the date information is not coming from the source metadata, but from the page's config.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 29 Nov 2014 21:00:44 -0800
parents 0445a2232de7
children 9f3fc17e71e1
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f5ca5c5bed85 More Python 3 fixes, modularization, and new unit tests.
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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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62c7a97c8340 Get the un-paginated URL of a page early and pass that around.
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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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34
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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 _debugRenderAssetNames(self):
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61 self._cacheAssets()
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62 return list(self._cache.keys())
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63
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64 def _cacheAssets(self):
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65 if self._cache is not None:
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66 return
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67
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68 self._cache = {}
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69 name, ext = os.path.splitext(self._page.path)
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70 assets_dir = name + Assetor.ASSET_DIR_SUFFIX
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71 if not os.path.isdir(assets_dir):
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72 return
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74 rel_assets_dir = os.path.relpath(assets_dir, self._page.app.root_dir)
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75 base_url = build_base_url(self._page.app, self._uri, rel_assets_dir)
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76 for fn in os.listdir(assets_dir):
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77 full_fn = os.path.join(assets_dir, fn)
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78 if not os.path.isfile(full_fn):
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79 raise Exception("Skipping: %s" % full_fn)
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80 continue
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82 name, ext = os.path.splitext(fn)
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83 if name in self._cache:
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84 raise UnsupportedAssetsError(
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85 "Multiple asset files are named '%s'." % name)
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86 self._cache[name] = (base_url + fn, full_fn)
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87
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88 cpi = self._page.app.env.exec_info_stack.current_page_info
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89 if cpi is not None:
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90 used_assets = list(map(lambda i: i[1], self._cache.values()))
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91 cpi.render_ctx.used_assets = used_assets
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92