README.md

Trusted Artifacts variants generator

Description

This tool is used for the generation of trusted artifacts variants of a task. It will process a set of directions in recipe.yaml file and based on that and a set of builtin conventions generate the Tekton Task definition in YAML format.

This tool is used by the hack/generate-ta-tasks.sh script.

Usage

The tool uses only one argument - path to the recipe.yaml file. These recipe.yaml files are stored in the task directories ending with -oci-ta.

Usage (from the task-generator/trusted-artifacts directory)

go run . path/to/recipe.yaml

The generated Trusted Artifacts Task is provided on the standard output.

Recipe defines how to transform a non-Trusted Artifacts Tekton Task definition to a Trusted Artifacts Tekton Task definition.

Basic recipe consists of providing a base path to the non-Trusted Artifacts Task and declaring that the Task will either create or use Trusted Artifacts by setting the add to create-source, create-cachi2, use-source and/or use-cachi2.

For example:

---
base: ../../mytask/0.1/mytask.yaml
add:
  - use-source
  - create-source

Further options can be added as needed, most commonly removal of workspace declarations using removeWorkspaces and string replacements using replacements.

Configuration in recipe.yaml

The following is the list of supported options:

Option	Type	Description
add	sequence of strings	Task Steps to add, can be one or more of create-source, create-cachi2, use-source or use-cachi2
addEnvironment	sequence of EnvVar	Additional environment variables to add to all existing Task Steps in the non-Trusted Artifact Task
additionalSteps	sequence of AdditionalSteps	Additional Tekton Steps to add
addParams	sequence of Tekton ParamSpecs	Additional Tekton Task parameters to add to the Task
addResult	sequence of Tekton TaskResults	Additional Tekton Task results to add to the Task
addVolume	sequence of Volumes	Additional Volumes to add to the Task
addVolumeMount	sequence of VolumeMounts	Additional VolumeMount to add to the Task
base	string	Relative path from recipe.yaml to the Task definition of the non-Trusted Artifacts Task
description	string	Description of the Trusted Artifacts Task
displaySuffix	string	Additional text to place to the value of tekton.dev/displayName annotation from the non-Trusted Artifacts Task to the Trusted Artifacts Task (default: " oci trusted artifacts")
preferStepTemplate	boolean	When true preference is set to configure common configuration on the Task.spec.stepTemplate rather than on each Task Step
regexReplacements	map of strings keys and string values	Perform regular expression-based replacement with keys being the regular expression and the values being the replacement, see Replacements
removeParams	sequence of strings	Names of Task parameters to remove
removeVolumes	sequence of strings	Names of Task Volumes to remove
removeWorkspaces	sequence of strings	Names of Workspaces to remove
replacements	map of strings keys and string values	Replacements to perform, keys will be replaced with the values
suffix	string	Additional text to place to the Task name from the non-Trusted Artifacts Task to the Trusted Artifacts Task (default: "-oci-ta")

Additional steps

Option	Type	Description
Any key from Tekton Step	Tekton Step	Inline definition of a Tekton Step
at	number	Step insertion point as a index of the Task.spec.steps sequence

Replacements

Both regular expression (regexReplacements) and string based replacements (replacements) operate on a fixed set of keys in the Task, these are:

• Task.spec.stepTemplate.env
• Task.spec.stepTemplate.workingDir
• Task.spec.steps.env
• Task.spec.steps.workingDir
• Task.spec.steps.script

Testing

There are various included tests in the golden folder. They use the base.yaml file which gets modified based on the recipe.yaml and is compared to the ta.yaml

go test ./...