execCommand is a wrapper around exec.Command which sets up the environment and stdin/stdout/stderr.

TODO: define an inode type to use instead of interface{}?

writeMetadataChunks copies from r to w in blocks of metadataBlockSize bytes each, prefixing each block with a uint16 length header, setting the uncomp

Directory creates a new directory with the specified name and modTime.

HasArchSuffix reports whether pkg ends in an architecture identifier (e.g. emacs-amd64) and returns the identifier.

Repos returns all configured repositories by consulting DistriConfig. It is a function to avoid I/O for invocations which don’t need to deal with repo

Retrieve streams the file located at path in chunks of size 4096 bytes.

Store persists a file on the builder. Simple implementations might write the file to a directory and clean up files older than a day every hour in a