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Extendable alternative client for Docker

Project description

# dkr

Extensible Docker CLI Client

## To Use

`dkr --help` for use.

## To Install

```bash
pip install dkr
```

## To Extend

Add any .py file to `~/.dkr/commands/`. It should have the following functions:

* `command()`: returns a `str` or `list` of `str`. The name of the subcommand(s).
* `help_summary(str)`: takes a `str` returns a `str`. The returned string is what is displayed for the given command in `--help`.
* `import_command(docker_client, args, state)`: Takes the docker-py docker client and a subparser for argparse.ArgumentParser for the command. The state is a simple dictionary that remains persistent between running the dkr command. You can use this to track state, e.g. to remember what the last container was used so you can provide a shortcut.
`args.set_defaults(func=somefunc)` should be called. `somefunc` will be invoked when your particular command is run from the CLI. It should accept the same three arguments as import_command.


## Create Options

The `dkr create` command has the `--option` (`-o`) flag that can be specified multiple times. The format is explained below.
This can be used to specify any docker create arg, using the naming conventions used by [docker-py](http://docker-py.readthedocs.io/en/latest/api/#create_container)


## Create Options Format

These arguments get expanded to a dict. For example:

```bash
dkr create -o key=value image_name
```

Is expanded to:

```python
{
"key": "value"
}
```

This also handles nested values:

```bash
dkr create -o nested.key=value image_name
```

Is expanded to:

```python
{
"nested": {
"key": "value"
}
}
```

You can also specify raw json values:

```bash
dkr create -o nested.key:=true image_name
```

Is expanded to:

```python
{
"nested": {
"key": True
}
}
```

And:

```bash
dkr create -o "nested.key:=[true, false, 0]" image_name
```

Is expanded to:

```python
{
"nested": {
"key": [True, False, 0]
}
}
```

You can use multiple options:

```bash
dkr create -o "nested.key:=[true, false, 0]" -o "nested.key2=value" image_name
```

Is expanded to:

```python
{
"nested": {
"key": [True, False, 0],
"key2": "value"
}
}
```

You can test this yourself by running `dkr_core/cmd_to_json.py` with naked arguments. i.e. no `-o`:

```bash
python3 dkr_core/cmd_to_json.py "nested.key:=[true, false, 0]" "nested.key2=value"
```

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