NewParser returns an initialized Parser.

BuildCmd is a wrapper for the os/exec call for `docker build`.

A CommandSequence is an intermediate data type in the parsing process.

DockerCmdOpts is an options struct for the options required by the various structs that implement the DockerCmd interface */.

An InstructionSet is an intermediate datatype - once a Builderfile is parsed and the TOML is validated, the parser parses the data into an InstructionSet.

Parser is a struct that contains a Builderfile and knows how to parse it both as raw text and to convert toml to a Builderfile struct.

PushCmd is a wrapper for the docker PushImage functionality.

A SubSequence is a logical grouping of commands such as a sequence of build, tag, and push commands.

SubSequenceMetadata contains any important metadata about the container build such as the name of the Dockerfile and which files/dirs to exclude.

TagCmd is a wrapper for the docker TagImage functionality.

DockerCmd is an interface that wraps the various docker command types.