Building a static library as a root doesn't build its dependencies

[MrcSnm]

System information

• dub version: Dub 1.31.1
• OS Platform and distribution: Windows 10
• compiler version LDC 1.32.0

Bug Description

Building a static library as a root doesn't build its dependencies

How to reproduce?

Download and execute dub. You'll notice the log listed below it does find the dependency, but, it is only included as an importPath and it is not being actually built.

static_libs_dep.zip

Expected Behavior

I'm not even expecting it to combine the libraries, but I would at least like to it build all its dependencies.
My usage is that I'm using dub to build the libraries and then move those libraries to use with another program.

Logs

Found dependency deps @deps
Generating using build
Configuring dependent static_libs_dep, deps:"deps"
  Configuring dependent deps, deps:
    Starting Performing "debug" build using C:\D\ldc2\ldc2-1.32.0-windows-x64\bin\ldc2.exe for x86_64.
    Building static_libs_dep ~master: building configuration [library]
C:\D\ldc2\ldc2-1.32.0-windows-x64\bin\ldc2.exe -lib -ofC:\Users\Hipreme\AppData\Local\dub\cache\static_libs_dep\~master\build\library-debug-windows-x86_64-ldc_v1.32.0-894DC41A1ED4DA75A3034CE2A0F9A6A6C13C4E3390564189D51523ADE73606BC\static_libs_dep.lib -d-debug -g -w --oq -od=C:\Users\Hipreme\AppData\Local\dub\cache\static_libs_dep\~master\build\library-debug-windows-x86_64-ldc_v1.32.0-894DC41A1ED4DA75A3034CE2A0F9A6A6C13C4E3390564189D51523ADE73606BC/obj -d-version=Have_static_libs_dep -d-version=Have_deps -Isource -Ideps\source source\mainDep.d -vcolumns

[MrcSnm]

#2647 fixes that

[WebFreak001]

was by design, use the new --deep flag to build dependencies as well for static libraries.