Actions syntax
Neuro Flow supports two sources of action files: local filesystem and Github repository.
For filesystem actions, you can place a config file in any location inside the project's workspace. No special name is required.
For actions stored on Github, you should name the config file either
config.yml or config.yaml and place it in the repository's root. To make your action usable, there should be a tagged commit inside the repository.The following YAML attributes are supported:
Required The action's kind defines its behavior. Different kinds have some additional attributes. Here are the available kinds of actions:
Expression contexts: This attribute only allows expressions that don't access contexts.
The action's name.
Expression contexts: This attribute only allows expressions that don't access contexts.
The action's author.
Expression contexts: This attribute only allows expressions that don't access contexts.
A description of the action.
Expression contexts: This attribute only allows expressions that don't access contexts.
A mapping of key-value pairs that can be passed to the action. Each key can also have an optional default value and description.
The input can be specified in a short and long form.
The short form is compact, but only allows to specify the input name and its default value:
inputs:
name1: default1
name2: ~ # None by default
name3: "" # Empty string by default
The long form allows to also specify the input's description. This can be useful for documenting the usage of the action and generating more detailed error messages.
inputs:
name1:
default: default1
descr: The name1 description
name2:
default: ~
descr: The name2 description
name3:
default: ""
descr: The name3 description
The inputs can be used in expressions for calculating all other action attributes.
Expression contexts: This attribute only allows expressions that don't access contexts.
Actions with single jobs that can be integrated into a live workflow.
These actions have the following additional attributes:
Required A job that will run when the action is called. Attributes are the same as for a
job in a live workflow. Even though attributes are the same as in live workflows, the available expression contexts are different: actions have no access to
defauls, volumes, and images of the main workflow.Actions with sets of tasks that can be integrated into a batch workflow as a single task.
These have the following additional attributes:
A mapping of key-value pairs that the action exposes. Tasks in the workflow that contain action calls will be able to access them through the
needs context.If this attribute is missing, the action will not expose any outputs and the action call will always be successful.
The key
output-name is a string and its value is a map that defines a single output. You must replace <output-name> with a string that is unique to the outputs object.Required. An expression that calculates the value of an output. Can only access outputs of tasks that are specified in
outputs.needs.Example:
outputs:
needs: [last_task]
name:
value: ${{ needs.last_task.name }}
Description of an output. It can be useful for documenting actions.
Example:
outputs:
name:
descr: The output description
Expression contexts: This attribute only allows expressions that don't access contexts.
A mapping that defines how the outputs of this action's tasks are cached. It can be overridden by
tasks.cacheThe default strategy to use for caching. Available options are:
"none"Don't use caching at all."inherit"Inherit the value from the batch workflow that uses this action."default"The basic caching algorithm that reuses cached outputs in case the task definition and all expression contexts available in task expressions are the same.
Default:
"default"Example:
cache:
strategy: "default"
The default cache invalidation duration.
This attribute can accept the following values:
- A
floatnumber representing an amount of seconds - A string in the following format:
1d6h15m45s(1 day, 6 hours, 15 minutes, 45 seconds).
Default:
14d (two weeks)If you decrease this value and re-run the workflow,
neuro-flow will ignore all cache entries that were added longer ago than the new cache.life_span value specifies.Example:
cache:
life_span: 31d # Cache is valid for one month
A list of tasks to run when the action is called. All attributes are the same as in
tasks in a batch workflow. Expression contexts:
inputs context , strategy context are available for all attributes, matrix context, needs context are available for same attributes as in batch workflow.A stateful action defines two tasks:
It has the following additional attributes:
A mapping of key-value pairs that the action exposes. This only serves documentation purposes in
stateful actions. The real outputs are generated by the main task.The key
output-name is a string and its value is a mapping that contains the output's description. You must replace <output-name> with a string that is unique to the outputs object.The output's description.
Example:
outputs:
resource_id:
descr: The identifier of the created resource
Expression contexts: This attribute only allows expressions that don't access contexts.
A mapping that defines how the outputs of the
main and post tasks are cached.The strategy to use for caching. Available options are:
"none"Don't use caching at all."inherit"Inherit the value from the batch workflow that uses this action."default"The basic caching algorithm that reuses cached outputs in case the task definition and all expression contexts available in task expressions are the same.
Default:
"default"Example:
cache:
strategy: "default"
The cache invalidation duration.
This attribute can accept one of the following values:
- A
floatnumber representing an amount of seconds - A string in the following format:
1d6h15m45s(1 day, 6 hours, 15 minutes, 45 seconds).
Default:
14d (two weeks)If you decrease this value and re-run the flow,
neuro-flow will ignore all cache entries that were added longer ago than the new cache.life_span value specifies.Example:
cache:
life_span: 31d # Cache is valid for one month
Required A mapping that defines the main task that is executed when the action is called. The action call is successful if this task is successful and will be failed if this task fails. Outputs of this task are passed to the main workflow as action call outputs.
This mapping only supports the subset of
tasks attributes from batch workflows. The unsupported attributes are: id, needs, strategy, enable, cache.A mapping that defines a post task that is executed after the main workflow is completed. If the main workflow uses more than one
stateful action, the post tasks will run in reversed order: the first post task corresponds to the last main task.This mapping only supports the subset of
tasks attributes from batch workflows. The unsupported attributes are: id, needs, strategy, enable, cache.The flag to conditionally prevent a post task from running unless a condition is met. To learn more about writing conditions, refer to expression syntax. Default:
${{ always() }}Example:
post_if: ${{ state.created }} # Run post only if the resource was created
Actions that define
cmd to be executed on the user's machine before running a batch workflow. Calls to actions of this kind precede all other tasks and action calls in the main workflow.It has the following additional attributes:
A mapping of key-value pairs that the action exposes. This only serves documentation purposes in
local actions. The real outputs are generated by cmd.The key
output-name is a string, and its value is a mapping that contains the output's description. You must replace <output-name> with a string that is unique to the outputs object.The output's description.
Example:
outputs:
exit_code:
descr: The exit code of the shell program
Expression contexts: This attribute only allows expressions that don't access contexts.
A command line code to execute locally. The shell type and the available commands depend on the user's system configuration, but you can safely assume that the low-level
neuro commands are available.Example:
cmd:
neuro cp -r ${{ inputs.from }} ${{ inputs.to }} # Copy files to storage
Last modified 1yr ago