DirExistAndHasContent checks if the given directory exists and has content.

FileHasContent checks if the specified file exists and has content.

GetAllEnvVarsFromHost retrieves all environment variables from the host and returns them as a map.

GetAllEnvVarsFromHostAsStruct retrieves the specified environment variables from the host and returns them as a slice of EnvVar structs.

IsValidDirE checks if the given path is a valid directory.

MergeSlices merges multiple slices of strings into a single slice.

EnvVar represents an environment variable with a name and value.