Override the path to a dependency

The configuration in Build.act sets the path or url that is normally used for a dependency. It is possible to temporarily override the path through the --dep argument to acton build.

Let's say we have the following configuration:

dependencies = {
  "foo": (
        url="https://github.com/actonlang/foo/archive/refs/tags/v1.0.zip",
        hash="1220cd47344f8a1e7fe86741c7b0257a63567b4c17ad583bddf690eedd672032abdd",
    ),
}

zig_dependencies = {}

Now we want to make some modifications to the foo library, so we clone it to a local path. We can now build our project using acton build --dep foo=../foo to temporarily override the foo dependency to use the path ../foo instead of the url in the configuration.