Package api defines the API that the command-line interface uses to communicate with UPM language backends.

Package backends contains the language-specific UPM backends, and logic for selecting amongst them.

Package cli implements the command-line interface of UPM.

Package config contains global variables that are set according to the command line.

Package pkg defines methods and heuristics for sanitizing package output.

Package store handles reading and writing the .upm/store.json file.

Package table provides a simple API for outputting tabular data to stdout.

Package util contains miscellaneous globally available utility functions.