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GH-200 - Author and maintain actions - Section 3.4

Implement workflow commands inside an action to set outputs, write environment files and emit log messages.

Implement workflow commands inside a custom action to set step outputs via GITHUB_OUTPUT and write environment variables to environment files. Use the actions toolkit libraries to emit debug, warning, and error log messages.

workflow commandsset outputGITHUB_OUTPUTactions toolkit

More in this domain

Select and implement the appropriate action type among JavaScript, Docker container and composite actions, accounting for immutable action behaviour.Section 3.1
Troubleshoot custom action execution and runtime errors during a workflow run.Section 3.2
Define the required files, directory structure and action.yml metadata, including inputs, outputs and branding, for a custom action.Section 3.3
Select a distribution model among public, private and Marketplace, and publish an action to the GitHub Marketplace.Section 3.5
Apply versioning and release strategies for an action using tags, release branches and semantic version references.Section 3.6

Back to all Author and maintain actions objectives, or the GH-200 cert hub.

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