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Just-in-Time Directories

Just-in-time directories are produced by calling a Dagger Function that returns the Directory type.

Just-in-time directories might be produced by a Dagger Function that:

  • Builds language-specific binaries
  • Downloads source code from git or another remote source
  • Processes source code (for example, generating documentation or linting code)
  • Downloads or processes datasets
  • Downloads machine learning models

Here is an example of a Go builder Dagger Function that accepts a remote Git address (the address of Dagger's open-source repository) as a Directory argument, builds a Go binary from the source code in that repository, and returns the build directory containing the compiled binary.

dagger -m github.com/kpenfound/dagger-modules/golang@v0.2.0 call build --source=https://github.com/dagger/dagger --args=./cmd/dagger

Once the command completes, you should see this output:

_type: Directory
entries:
    - dagger

This means that the build succeeded, and a Directory type representing the build directory was returned.