CODEWITHSUNDEEP
bazel
polina-c
polina-c

Reputation: 7087

How to get dependency graph for dependencies of a target?

I want to get mutual dependencies of all dependencies of a target, to provide this information to a binary (for static analysis).

I defined a rule that loop through direct dependencies. How can I get dependencies of each dependency, to discover the entire graph recursively? Is it possible at all? If no, is there an alternative way?

def _impl(ctx):
    
    for i, d in enumerate(ctx.attr.deps):
        # I need to get dependencies of d somehow here

Upvotes: 0

Views: 2623

Answers (2)

polina-c
polina-c

Reputation: 7087

I need to pass parameter --output=graph to genquery:

blaze query "kind(rule, deps(//path/to/mytarget))" --output=graph

Upvotes: 0

ahumesky
ahumesky

Reputation: 5016

Depending on exactly what information you want, Aspects may do what you want: https://docs.bazel.build/versions/master/skylark/aspects.html

They allow a rule to collect additional information from transitive dependencies.

There's also the genquery rule, but this may or may not give you all the information you want: https://docs.bazel.build/versions/master/be/general.html#genquery

genquery makes bazel query results available to actions.

Upvotes: 2

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