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annotate piecrust/data/assetor.py @ 809:22c6f6a3d0a0

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admin: Add ability to upload page assets.
author Ludovic Chabant <ludovic@chabant.com>
date Sat, 17 Dec 2016 19:55:10 -0800
parents dc78ade3f320
children 570f89414b2c
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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 import ASSET_DIR_SUFFIX
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5 from piecrust.uriutil import multi_replace
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8 logger = logging.getLogger(__name__)
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11 class UnsupportedAssetsError(Exception):
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12 pass
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15 def build_base_url(app, uri, rel_assets_path):
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16 base_url_format = app.env.base_asset_url_format
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17 rel_assets_path = rel_assets_path.replace('\\', '/')
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19 # Remove any extension since we'll be copying assets into the 1st
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20 # sub-page's folder.
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21 pretty = app.config.get('site/pretty_urls')
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22 if not pretty:
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23 uri, _ = os.path.splitext(uri)
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25 base_url = multi_replace(
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26 base_url_format,
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27 {
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28 '%path%': rel_assets_path,
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29 '%uri%': uri})
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31 return base_url.rstrip('/') + '/'
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34 class Assetor(object):
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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 allNames(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 _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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72 self._cache = {}
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73 name, ext = os.path.splitext(self._page.path)
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74 assets_dir = name + 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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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.current_pass_info.used_assets = True
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95