All kinds of contributions are more than welcomed. You can help make tower CLI better by reporting bugs, come up
with feature ideas or, even further, help maintainers out by making pull requests. Make sure you follow the rules
below when contributing and you are ready to roll ;)
Architecture Overview
All available Tower CLI resources descent from abstract class tower_cli.models.base.BaseResource, which provides
two fundamental methods, read and write. read wraps around a GET method to the specified resource, while
write wraps around a POST or PATCH on condition. Most public resource APIs, like create or list, are
essentially using a combination of read and write to communicate with Tower REST APIs.
-
class
tower_cli.models.base.BaseResource[source]
Abstract class representing resources within the Ansible Tower system, on which actions can be taken.
Includes standard create, modify, list, get, and delete methods.
Some of these methods are not created as commands, but will be implemented as commands inside of non-abstract
child classes. Particularly, create is not a command in this class, but will be for some (but not all) child
classes.
-
read(pk=None, fail_on_no_results=False, fail_on_multiple_results=False, **kwargs)[source]
Retrieve and return objects from the Ansible Tower API.
| Parameters: |
- pk (int) – Primary key of the resource to be read. Tower CLI will only attempt to read that object
if
pk is provided (not None).
- fail_on_no_results (bool) – Flag that if set, zero results is considered a failure case and raises
an exception; otherwise, empty list is returned. (Note: This is always True
if a primary key is included.)
- fail_on_multiple_results (bool) – Flag that if set, at most one result is expected, and more results
constitutes a failure case. (Note: This is meaningless if a primary
key is included, as there can never be multiple results.)
- query (list) – Contains 2-tuples used as query parameters to filter resulting resource objects.
- **kwargs – Keyword arguements which, all together, will be used as query parameters to filter
resulting resource objects.
|
|---|
| Returns: | loaded JSON from Tower backend response body.
|
|---|
| Return type: | dict
|
|---|
| Raises: |
|
|---|
-
write(pk=None, create_on_missing=False, fail_on_found=False, force_on_exists=True, **kwargs)[source]
Modify the given object using the Ansible Tower API.
| Parameters: |
- pk (int) – Primary key of the resource to be read. Tower CLI will only attempt to read that object
if
pk is provided (not None).
- create_on_missing (bool) – Flag that if set, a new object is created if
pk is not set and objects
matching the appropriate unique criteria is not found.
- fail_on_found (bool) – Flag that if set, the operation fails if an object matching the unique criteria
already exists.
- force_on_exists (bool) – Flag that if set, then if an object is modified based on matching via unique
fields (as opposed to the primary key), other fields are updated based on data
sent; If unset, then the non-unique values are only written in a creation case.
- **kwargs – Keyword arguements which, all together, will be used as POST/PATCH body to create/modify
the resource object. if
pk is not set, key-value pairs of **kwargs which are
also in resource’s identity will be used to lookup existing reosource.
|
|---|
| Returns: | A dictionary combining the JSON output of the resource, as well as two extra fields: “changed”,
a flag indicating if the resource is created or successfully updated; “id”, an integer which
is the primary key of the specified object.
|
|---|
| Return type: | dict
|
|---|
| Raises: | tower_cli.exceptions.BadRequest – When required fields are missing in **kwargs when creating
a new resource object.
|
|---|
Here is the detailed class hierarchy from tower_cli.models.base.BaseResource to all specific Tower resources:
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"tower_cli.resources.host.Resource" [URL="api_ref/resources/host.html#tower_cli.resources.host.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for credentials."];
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"tower_cli.resources.inventory_script.Resource" [URL="api_ref/resources/inventory_script.html#tower_cli.resources.inventory_script.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for inventory scripts."];
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"tower_cli.resources.inventory_source.Resource" [URL="api_ref/resources/inventory_source.html#tower_cli.resources.inventory_source.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for inventory sources."];
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"tower_cli.models.base.MonitorableResource" -> "tower_cli.resources.inventory_source.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
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"tower_cli.resources.label.Resource" [URL="api_ref/resources/label.html#tower_cli.resources.label.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for labels."];
"tower_cli.models.base.Resource" -> "tower_cli.resources.label.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
"tower_cli.resources.node.Resource" [URL="api_ref/resources/node.html#tower_cli.resources.node.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for workflow nodes."];
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"tower_cli.resources.notification_template.Resource" [URL="api_ref/resources/notification_template.html#tower_cli.resources.notification_template.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for notification templates."];
"tower_cli.models.base.Resource" -> "tower_cli.resources.notification_template.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
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"tower_cli.models.base.MonitorableResource" -> "tower_cli.resources.project.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
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"tower_cli.models.base.Resource" -> "tower_cli.resources.role.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
"tower_cli.resources.schedule.Resource" [URL="api_ref/resources/schedule.html#tower_cli.resources.schedule.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for schedules."];
"tower_cli.models.base.Resource" -> "tower_cli.resources.schedule.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
"tower_cli.resources.setting.Resource" [URL="api_ref/resources/setting.html#tower_cli.resources.setting.Resource",fontname="Vera Sans, DejaVu Sans, Liberation Sans, Arial, Helvetica, sans",fontsize=10,height=0.25,shape=box,style="setlinewidth(0.5)",target="_top",tooltip="A resource for Tower configurations."];
"tower_cli.models.base.Resource" -> "tower_cli.resources.setting.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
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"tower_cli.models.base.Resource" -> "tower_cli.resources.user.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
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"tower_cli.models.base.ExeResource" -> "tower_cli.resources.workflow_job.Resource" [arrowsize=0.5,style="setlinewidth(0.5)"];
}
Details of each Tower CLI resource module are available under tower_cli/resources/.
Some root-level modules under tower_cli/ folder are of great importance. Specifically, api.py contains details
of the API client Tower CLI used to make HTTP(S) requests using
requests, and conf.py is used to define and initialize singleton
setting object tower_cli.conf.settings.
On the other hand, tower_cli/cli/ folder contains code that extends tower_cli from a python library into a full-
fledged command-line interface. We use click as the CLI engine.
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"click.types.File" -> "tower_cli.cli.types.Variables" [arrowsize=0.5,style="setlinewidth(0.5)"];
}