Introduction
Alire is a source-based package manager for the Ada and SPARK programming languages.
It is a way for developers to easily build upon projects (libraries or programs) shared by the community, but also to easily share their projects for others to build upon.
In the Alire vocabulary, sources of projects/libraries/programs are provided by what is called a crate. A crate can depend on crates, and other crates can depend on it. For instance, the libgpr crate depends on the xmlada crate.
Crates can have multiple dependencies, themselves having multiple dependencies. This forms a dependency graph. Alire's main task is to automatically fetch, build and upgrade the crates of the dependency graph so you don't have to do it by hand.
The main interface into the Alire ecosystem is a command line tool called alr.