please_diff_graphs

Overview ¶

package main implements plz_diff_graphs, a small utility to take the JSON representation of two build graphs (as output from 'plz query graph') and produce a list of targets that have changed between the two.

Note that the 'ordering' of the two graphs matters, hence their labels 'before' and 'after'; the operation is non-commutative because targets that are added appear and those deleted do not.

It also accepts a list of filenames that have changed and invalidates targets appropriately.