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annotate libervia/server/tasks/implicit/task_js_modules.py @ 1401:aada5471d6bc

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doc: update installation instruction following renaming and new `requirements.txt`: - `requirements.txt` are now used in installation instruction for dev version - renamed config files, config section, executable according to recent changes - added requirements section
author Goffi <goffi@goffi.org>
date Sat, 20 Mar 2021 20:58:45 +0100
parents 10748aa888a9
children 2f6dac783c8e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/ur/bin/env python3
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2
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3 import json
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4 from pathlib import Path
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5 from sat.core.i18n import _
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6 from sat.core.log import getLogger
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7 from sat.core import exceptions
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8 from libervia.server.constants import Const as C
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9 from libervia.server.tasks import task
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10
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11
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12 log = getLogger(__name__)
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13
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14
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15 class Task(task.Task):
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16
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17 async def prepare(self):
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18 if "js" not in self.resource.browser_modules:
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19 raise exceptions.CancelError(f"No JS module needed")
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20
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21 async def start(self):
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22 js_data = self.resource.browser_modules['js']
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23 package = js_data.get('package', {})
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24 package_path = self.build_path / 'package.json'
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25 with package_path.open('w') as f:
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26 json.dump(package, f)
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27
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28 cmd = self.findCommand('yarnpkg', 'yarn', 'npm')
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29 await self.runCommand(cmd, 'install', path=str(self.build_path))
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30
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31 try:
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32 brython_map = js_data['brython_map']
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33 except KeyError:
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34 pass
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35 else:
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36 log.info(_("creating JS modules mapping for Brython"))
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37 js_modules_path = self.build_path / 'js_modules'
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38 js_modules_path.mkdir(exist_ok=True)
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39 init_path = js_modules_path / '__init__.py'
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40 init_path.touch()
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41
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42 for module_name, module_data in brython_map.items():
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43 log.debug(f"generating mapping for {module_name}")
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44 if ' ' in module_name:
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45 raise ValueError(
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46 f"module {module_name!r} has space(s), it must not!")
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47 module_path = js_modules_path / f"{module_name}.py"
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48 if isinstance(module_data, str):
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49 module_data = {'path': module_data}
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50 try:
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51 js_path = module_data.pop('path')
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52 except KeyError:
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53 raise ValueError(
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54 f'module data for {module_name} must have a "path" key')
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55 module_data['path'] = Path('node_modules') / js_path.strip(' /')
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56 export = module_data.get('export') or [module_name]
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57 export_objects = '\n'.join(f'{e} = window.{e}' for e in export)
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58 extra_kwargs = {"build_dir": C.BUILD_DIR}
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59
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60 with module_path.open('w') as f:
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61 f.write(f"""\
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62 #!/usr/bin/env python3
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63 from browser import window, load
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64 {module_data.get('extra_import', '')}
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65
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66 load("{Path('/').joinpath(C.BUILD_DIR, module_data['path'])}")
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67 {export_objects}
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68 {module_data.get('extra_init', '').format(**extra_kwargs)}
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69 """)