Mercurial > libervia-web

annotate libervia/server/tasks/implicit/task_js_modules.py @ 1260:6161076193e0

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tasks: dir event filter: if a Task instance implements `onDirEvent`, it will be called instead of `start`, this way the task can filter the events or modify the workflow.
author Goffi <goffi@goffi.org>
date Sun, 03 May 2020 21:07:22 +0200
parents 0b269d4a46a3
children 10748aa888a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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780dbc2f4853 server (tasks): new `js_modules` implicit task:
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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 try:
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29 cmd = self.findCommand('yarn')
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30 except exceptions.NotFound:
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31 cmd = self.findCommand('npm')
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32 await self.runCommand(cmd, 'install', path=str(self.build_path))
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33
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34 try:
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35 brython_map = js_data['brython_map']
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36 except KeyError:
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37 pass
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38 else:
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39 log.info(_("creating JS modules mapping for Brython"))
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40 js_modules_path = self.build_path / 'js_modules'
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41 js_modules_path.mkdir(exist_ok=True)
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42 init_path = js_modules_path / '__init__.py'
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43 init_path.touch()
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44
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45 for module_name, module_data in brython_map.items():
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46 log.debug(f"generating mapping for {module_name}")
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47 if ' ' in module_name:
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48 raise ValueError(
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49 f"module {module_name!r} has space(s), it must not!")
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50 module_path = js_modules_path / f"{module_name}.py"
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51 if isinstance(module_data, str):
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52 module_data = {'path': module_data}
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53 try:
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54 js_path = module_data.pop('path')
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55 except KeyError:
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56 raise ValueError(
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57 f'module data for {module_name} must have a "path" key')
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58 module_data['path'] = Path('node_modules') / js_path.strip(' /')
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59 export = module_data.get('export') or [module_name]
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60 export_objects = '\n'.join(f'{e} = window.{e}' for e in export)
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61 extra_kwargs = {"build_dir": C.BUILD_DIR}
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62
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63 with module_path.open('w') as f:
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64 f.write(f"""\
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65 #!/usr/bin/env python3
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66 from browser import window, load
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67 {module_data.get('extra_import', '')}
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68
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69 load("{Path('/').joinpath(C.BUILD_DIR, module_data['path'])}")
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70 {export_objects}
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71 {module_data.get('extra_init', '').format(**extra_kwargs)}
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72 """)