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1 | """ |
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2 | DictFS allows you to easily create read-only filesystems when the |
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3 | file tree is known in advance. |
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4 | |
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5 | To create your own DictFS descendent, simply override the files |
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6 | property, which can be created either using the property |
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7 | decorator, or just a simple assignment. |
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8 | |
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9 | A dictionary represents a directory, with keys corresponding to |
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10 | file names and the values corresponding to the file contents. |
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11 | """ |
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12 | |
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13 | import routefs |
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14 | from routes import Mapper |
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15 | import os |
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16 | |
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17 | class DictFS(routefs.RouteFS): |
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18 | @property |
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19 | def files(self): |
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20 | """ |
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21 | This property should be overridden in your DictFS descendant |
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22 | """ |
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23 | return dict() |
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24 | |
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25 | def make_map(self): |
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26 | m = Mapper() |
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27 | |
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28 | m.connect('*path', controller='handler') |
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29 | |
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30 | return m |
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31 | |
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32 | def handler(self, path, **kwargs): |
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33 | if path != '': |
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34 | elements = path.split(os.path.sep) |
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35 | else: |
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36 | elements = [] |
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37 | |
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38 | try: |
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39 | tree = self.files |
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40 | for elt in elements: |
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41 | tree = tree[elt] |
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42 | except KeyError: |
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43 | return |
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44 | |
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45 | if type(tree) is dict: |
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46 | return tree.keys() |
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47 | else: |
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48 | return tree |
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