Dependency Tool for D
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Dependency Tool for D

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The depend tool helps to visualize import dependencies. Moreover, it allows to check them against a UML model of target dependencies.


Using the depend tool on the code of the popular vibe.d repository gives an overview of the package dependencies: package diagram


Use dub to build the depend tool:

dub build --build=release

Run the depend tool like you run dmd (most arguments are just passed to dmd).

For example, run the depend tool on its own code:

depend src/*.d

Consider switching to module dependencies instead of package dependencies:

depend --detail src/*.d

The output is a package diagram in the PlantUML language:

package deps {}
package graph {}
package main {}
package uml {}

main ..> deps
main ..> uml
uml ..> graph

Copy and paste the output to the PlantUML Server for visualization:

package diagram

For checking, specify the target dependencies in the PlantUML language. For example, create a text file target.uml.

Use the depend tool to check the import dependencies against the target dependencies:

depend --detail src/*.d --check target.uml

Then, the check will complain about violations:

error: unintended dependency main -> deps
error: unintended dependency main -> graph
error: unintended dependency main -> uml
error: unintended dependency uml -> graph

You will also get warnings about cyclic dependencies.

Alternatively, run dmd up front and pass the extracted dependencies explicitly:

dmd -deps=dependencies ...
depend --deps dependencies