get DeGAUSS metadata online or from a Dockerfile — get_degauss_env

These functions look in a Dockerfile (locally or online) to extract environment variables corresponding to DeGAUSS image metadata.

Usage

get_degauss_env_dockerfile(
  dockerfile_path = fs::path_join(c(getwd(), "Dockerfile"))
)

get_degauss_env_online(name = "fortunes")

Arguments

dockerfile_path: path to Dockerfile
name: name of DeGAUSS container to download Dockerfile from

Value

named vector of DeGAUSS metatdata

Details

Metadata on DeGAUSS images are defined using environment variables. Specifically within a Dockerfile, this is defined as ENV instructions where the name of the environment variable begins with degauss_, for example "degauss_name", or "degauss_version". It is assumed that each ENV instruction is on its own line and defines only one environment variable.

Examples

if (FALSE) {
use_degauss_dockerfile(version = "0.1")
get_degauss_env_dockerfile()
get_degauss_env_dockerfile()["degauss_version"]
}
get_degauss_env_online("fortunes")
#>                             degauss_name 
#>                               "fortunes" 
#>                          degauss_version 
#>                                  "0.1.3" 
#>                      degauss_description 
#>                          "random quotes" 
#>                         degauss_argument 
#> "number of quotes to print [default: 1]" 
get_degauss_env_online("fortunes")["degauss_version"]
#> degauss_version 
#>         "0.1.3"