A Ruby versioning constraint solver implementing Semantic Versioning 2.0.0.

$ gem install solve

Create a new graph

graph = Graph.new

Add an artifact to the graph

graph.artifact("nginx", "1.0.0")

Now add another artifact that has a dependency

graph.artifact("mysql", "1.2.4-alpha.1").depends("openssl", "~> 1.0.0")

Dependencies can be chained, too

graph.artifact("ntp", "1.0.0").depends("build-essential").depends("yum")

And now solve the graph with some demands

Solve.it!(graph, ['nginx', '>= 0.100.0'])

Or, if you want a topologically sorted solution NOTE: This will raise Solve::Errors::UnsortableSolutionError if the solution contains a cycle (which can happen with ruby packages)

Solve.it!(graph, ['nginx', '>= 0.100.0'], sorted: true)

By default the solver will wait 10 seconds before giving up on finding a solution. Under certain conditions a graph may be too complicated to solve within the alotted time. To increase the timeout you can set the "SOLVE_TIMEOUT" environment variable to the amount of seconds desired.

$ export SOLVE_TIMEOUT=30

This will set the timeout to 30 seconds instead of 10 seconds.

• Jamie Winsor ([email protected])
• Andrew Garson ([email protected])
• Thibaud Guillaume-Gentil (@thibaudgg)