pyinfra-dev/pyinfra v0.5

pyinfra v0.5

on GitHub

• Getting started
• Documentation

Changes in 0.5:

Vagrant connector:

# Run a deploy on all Vagrant machines (vagrant status list)
pyinfra @vagrant deploy.py
pyinfra @vagrant/vm_name deploy.py

# Can be used in tandem with other inventory:
pyinfra @vagrant,my-host.net deploy.py
pyinfra @vagrant,@local,my-host.net fact os

Consistent conditional branching:

• Add global when kwarg to all operations, similar to hosts can be used to prevent operations executing on hosts based on a condition
• Add state.limit(hosts) and state.when(condition) context managers to use in place of if statements within deploys
• @deploys and the context managers (state.limit, state.when) can all be nested as much as needed (although if you need to nest a lot, you're probably doing it wrong!)
• Add data_defaults kwarg to @deploy functions, meaning third party pyinfra packages can provide sensible defaults that the user can override individually
• Display a large warning when imbalanced branches are detected, linking the user to the documentation for the above

Examples:

from pyinfra import host, state
from pyinfra.modules import server

# Replace if blocks with the state.when context
with state.when(host.name == 'my-host.net'):
    server.shell('echo "my-host.net op!"')
    ...

# Use the when kwarg to achieve the same, for single operations
server.shell(
    'echo "my-host.net op!"',
    when=host.name == 'my-host.net',
)

with state.limit(inventory.get_host('my-host.net')):
    server.shell('echo "my-host.net op!"')
    ...

server.shell(
    'echo "my-host.net op!"',
    limit=inventory.get_host('my-host.net'),
)

Note that if statements/etc still work as before but pyinfra will print out a warning explaining the implications and linking to the docs (http://pyinfra.readthedocs.io/page/using_python.html#conditional-branches).

• Hooks change: no longer loaded from deploy files, only from config.py, due to changes from 0.4 (removal of FakeState nonsense)
• Add gpgkey argument to the yum.repo operation
• Add lsb_release fact
• apt_sources fact now supports apt repos with options ([arch=amd64])
• Improved error output when connecting
• Update testing box from Ubuntu 15 to Ubuntu 16
• Ensure ~/.ssh exists keyscanning in ssh.keyscan
• Don't include tests during setup!
• Fix caching of local SHA1s on files