dagger/docs/references/1222-core-actions-reference.md

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Core Actions Reference

Core Actions are primitives implemented by the Dagger Engine itself. They can be combined into higher-level composite actions. Their definitions can be imported in the dagger.io/dagger/core package.

For more information about Dagger Actions, see Dagger Actions.

The following core actions are available:

Core Actions related to filesystem trees

Definition	File	Description
#Copy	fs.cue	Copy files between two filesystem trees
#Diff	fs.cue	Extract the difference between two filesystems as its own file system
#Merge	fs.cue	Merge multiple filesystem trees
#Mkdir	fs.cue	Create a directory in a filesystem tree
#ReadFile	fs.cue	Read a file from a filesystem tree
#Scratch	fs.cue	Create an empty filesystem tree
#Source	fs.cue	Access the source for the current CUE package
#Subdir	fs.cue	Read a subdirectory from a filesystem tree
#WriteFile	fs.cue	Write a file to a filesystem tree

Core Actions related to secrets

Definition	File	Description
#DecodeSecret	secrets.cue	Decode a secret without leaking its contents
#NewSecret	secrets.cue	Create a new a secret from a filesystem tree
#TrimSecret	secrets.cue	Trim leading and trailing space characters from a secret

Core Actions related to containers

Definition	File	Description
#Dockerfile	image.cue	Build a container image using a Dockerfile
#Exec	exec.cue	Execute a command in a docker-compatible container
#Export	image.cue	Export a docker image as a tar archive
#Pull	image.cue	Download an image from a docker registry
#Push	image.cue	Upload an image to a docker registry
#Set	image.cue	Modify a docker image config

Core Actions related to remote data sources

Definition	File	Description
#GitPull	git.cue	Download a repository from a remote git server
#HTTPFetch	http.cue	Get a file from an HTTP server