Save dependencies adjacency matrix in a png image

[srmurguia]

For large projects with many module dependencies, the dependency graph can be dificult to visualize. Now, a png image is generated with a representation of the adjacency matrix.

The first row and first columns are headers, the colors there represent the type of module:

• Blue: Android app
• Green: Android module
• Yellow: Java module

If the cell in row r and column c is green, it means that the module associated with that row has a dependency with the module associated with that column. We can add different colors for different dependency methods later (api, implementation, testImplementation, etc).

This image was created using these settings:

"topologies": [ {"type": "binary_tree", "seed": "2"} ], "dependencies": [ {"from": "module1", "to": "module0"} ]

On a project with 20 Android and 50 pure modules

[srmurguia]

Last two commits incorporates the feedback from @NikitaKozlov.

This is an example of how the image colors changed after the last two commits:

The colors match the colors in https://docs.gradle.org/current/userguide/java_library_plugin.html#sec:java_library_configurations_graph

Right now the test for the image only checks the size, but not the content, the attached image is the image generated during the tests. What do you think is the best approach to test its content?

[NikitaKozlov]

@srmurguia maybe just store an "expected" image and compare it with generated one?

[NikitaKozlov]

LGTM