34 lines
820 B
Markdown
34 lines
820 B
Markdown
title: server-spawn
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---
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type: event
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---
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summary: Emitted right after the server was started.
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---
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body:
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When the development server boots up it emits this event if plugins want
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to spawn their own development tools. For instance it can be used to
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start a background process that kicks off webpack or similar tools. There
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is a second event called [server-stop :ref](../server-stop/) which can be
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used to detect server shutdowns.
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## Example
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```python
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import os
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from subprocess import Popen
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class MyPlugin(Plugin):
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...
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webpack = None
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def on_server_spawn(self, **extra):
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path = os.path.join(self.env.root_path, 'webpack')
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self.webpack = Popen(['webpack', '--watch'], cwd=path)
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def on_server_stop(self, **extra):
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if self.webpack is not None:
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self.webpack.kill()
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```
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