Checks that Docker daemon is running correctly on the local system, and that vol2bird Docker image is available.
logical. When TRUE messages are printed to R console.
0 upon success, otherwise an error code: 1 if Docker vol2bird image not available, 2 if Docker daemon not running, 3 if Docker daemon not found.
1 2 3 4 5
## Not run: # check if Docker is running and vol2bird image is available: check_docker() ## End(Not run)
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