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From dankilman <...@git.apache.org>
Subject [GitHub] incubator-ariatosca pull request #25: CLI commands for parser
Date Thu, 17 Nov 2016 07:54:31 GMT
Github user dankilman commented on a diff in the pull request:

    https://github.com/apache/incubator-ariatosca/pull/25#discussion_r88401147
  
    --- Diff: README.md ---
    @@ -1,4 +1,193 @@
    -Aria
    +ARIA
     ====
     
    -See http://ariatosca.org/
    +[ARIA](http://ariatosca.org/) is a minimal TOSCA orchestrator, as well as a platform
for building
    +TOSCA-based products. Its features can be accessed via a well-documented Python API,
as well as a
    +language-agnostic RESTful API that can be deployed as a microservice.
    +
    +On its own, ARIA provides built-in tools for blueprint validation and for creating ready-to-run
    +service instances. 
    +
    +ARIA adheres strictly and meticulously to the
    +[TOSCA Simple Profile v1.0 cos01 specification](http://docs.oasis-open.org/tosca/TOSCA-Simple-Profile-YAML/v1.0/cos01/TOSCA-Simple-Profile-YAML-v1.0-cos01.html),
    +providing state-of-the-art validation at seven different levels:
    +
    +<ol start="0">
    +<li>Platform errors. E.g. network, hardware, or even an internal bug in ARIA (let
us know,
    +	please!).</li>
    +<li>Syntax and format errors. E.g. non-compliant YAML, XML, JSON.</li>
    +<li>Field validation. E.g. assigning a string where an integer is expected, using
a list instead of
    +	a dict.</li>
    +<li>Relationships between fields within a type. This is "grammar" as it applies
to rules for
    +    setting the values of fields in relation to each other.</li>
    +<li>Relationships between types. E.g. referring to an unknown type, causing a type
inheritance
    +    loop.</li>
    +<li>Topology. These errors happen if requirements and capabilities cannot be matched
in order to
    +	assemble a valid topology.</li>
    +<li>External dependencies. These errors happen if requirement/capability matching
fails due to
    +    external resources missing, e.g. the lack of a valid virtual machine, API credentials,
etc.
    +    </li> 
    +</ol>
    +
    +Validation errors include a plain English message and when relevant the exact location
(file, row,
    +column) of the data the caused the error.
    +
    +The ARIA API documentation always links to the relevant section of the specification,
and likewise
    +we provide an annotated version of the specification that links back to the API documentation.
    +
    +
    +Quick Start
    +-----------
    +
    +You need Python 2.6 or 2.7. Python 3+ is not currently supported.
    +
    +To install, we recommend using [pip](https://pip.pypa.io/) and a
    +[virtualenv](https://virtualenv.pypa.io/en/stable/). In Debian-based systems:
    +
    +	sudo apt install python-setuptools
    +	sudo -H easy_install pip
    +	sudo -H pip install virtualenv
    +
    +To install the latest development snapshot of ARIA:
    +
    +	virtualenv env
    +	. env/bin/activate
    +	pip install git+http://git-wip-us.apache.org/repos/asf/incubator-ariatosca.git
    +
    +To test it, let's create a service instance from a TOSCA blueprint:
    +
    +	aria parse blueprints/tosca/node-cellar/node-cellar.yaml
    +	
    +You can also get it in JSON or YAML formats:
    +
    +	aria parse blueprints/tosca/node-cellar/node-cellar.yaml --json
    +
    +Or get an overview of the relationship graph:
    +
    +	aria parse blueprints/tosca/node-cellar/node-cellar.yaml --graph
    +
    +You can provide inputs as JSON, overriding default values provided in the blueprint
    +
    +	aria parse blueprints/tosca/node-cellar/node-cellar.yaml --inputs='{"openstack_credential":
{"user": "username"}}'
    +
    +Instead of providing them explicitly, you can also provide them in a file or URL, in
either JSON or
    +YAML. If you do so, the value must end in ".json" or ".yaml":
    +
    +	aria parse blueprints/tosca/node-cellar/node-cellar.yaml --inputs=blueprints/tosca/node-cellar/inputs.yaml
    +
    +
    +CLI Tool
    +--------
    +
    +Though ARIA is fully exposed as an API, it also comes with a CLI tool to allow you to
    +work from the shell:
    +
    +	aria parse blueprints/tosca/node-cellar/node-cellar.yaml instance
    +
    +The `parse` command supports the following directives to create variations of the default
consumer
    +chain:
    +
    +* `presentation`: emits a colorized textual representation of the Python presentation
classes
    +   wrapping the blueprint.
    +* `model`: emits a colorized textual representation of the complete service model derived
from the
    +   validated blueprint. This includes all the node templates, with their requirements
satisfied at
    +   the level of relating to other node templates.
    +* `types`: emits a colorized textual representation of the type hierarchies.
    +* `instance`: **this is the default command**; emits a colorized textual representation
of a
    +   service instance instantiated from the service model. Here the node templates are
each used to
    +   create one or more nodes, with the appropriate relationships between them. Note that
every time
    +   you run this consumer, you will get a different set of node IDs. Use `--graph` to
see just the
    +   node relationship graph.
    +   
    +For all these commands, you can also use `--json` or `--yaml` flags to emit in those
formats.
    +
    +Additionally, The CLI tool lets you specify the complete classname of your own custom
consumer to
    +chain at the end of the default consumer chain, after `instance`.
    +
    +Your customer consumer can be an entry point into a powerful TOSCA-based tool or application,
such
    +as an orchestrator, a graphical modeling tool, etc.
    +
    +
    +Development
    +-----------
    +
    +Instead of installing with `pip`, it would be easier to work directly with the source
files:
    +
    +	pip install virtualenv
    +	virtualenv env
    +	. env/bin/activate
    +	git clone http://git-wip-us.apache.org/repos/asf/incubator-ariatosca.git
    +	cd incubator-ariatosca
    +	pip install -e .
    +
    +To run tests:
    +
    +	pip install tox
    +	tox
    +
    +To build the documentation:
    --- End diff --
    
    we currently have no make file (or docs), so probably best to remove this line


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