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71 lines
2.4 KiB
Markdown
71 lines
2.4 KiB
Markdown
# Contributing to podman-compose
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## Adding new commands
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To add a command you need to add a function that is decorated
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with `@cmd_run` passing the compose instance, command name and
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description. the wrapped function should accept two arguments
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the compose instance and the command-specific arguments (resulted
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from python's `argparse` package) inside that command you can
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run PodMan like this `compose.podman.run(['inspect', 'something'])`
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and inside that function you can access `compose.pods`
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and `compose.containers` ...etc.
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Here is an example
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```
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@cmd_run(podman_compose, 'build', 'build images defined in the stack')
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def compose_build(compose, args):
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compose.podman.run(['build', 'something'])
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```
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## Command arguments parsing
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Add a function that accept `parser` which is an instance from `argparse`.
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In side that function you can call `parser.add_argument()`.
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The function decorated with `@cmd_parse` accepting the compose instance,
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and command names (as a list or as a string).
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You can do this multiple times.
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Here is an example
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```
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@cmd_parse(podman_compose, 'build')
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def compose_build_parse(parser):
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parser.add_argument("--pull",
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help="attempt to pull a newer version of the image", action='store_true')
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parser.add_argument("--pull-always",
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help="attempt to pull a newer version of the image, Raise an error even if the image is present locally.", action='store_true')
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```
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NOTE: `@cmd_parse` should be after `@cmd_run`
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## Calling a command from inside another
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If you need to call `podman-compose down` from inside `podman-compose up`
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do something like:
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```
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@cmd_run(podman_compose, 'up', 'up desc')
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def compose_up(compose, args):
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compose.commands['down'](compose, args)
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# or
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compose.commands['down'](argparse.Namespace(foo=123))
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```
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## Missing Commands (help needed)
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```
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bundle Generate a Docker bundle from the Compose file
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config Validate and view the Compose file
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create Create services
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events Receive real time events from containers
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images List images
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logs View output from containers
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port Print the public port for a port binding
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ps List containers
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rm Remove stopped containers
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run Run a one-off command
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scale Set number of containers for a service
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top Display the running processes
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```
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