build command ignores '--cache'

[0xEAB]

System information

• dub version: 1.11.0+13-gb837cee
• OS Platform and distribution: GNU/Linux 4.18, Ubuntu 18.04
• compiler version: doesn't matter

Bug Description

The build command (dub build) ignores the package cache option specified by --cache.

How to reproduce?

Double-check that the used package does not exist in the user cache, otherwise you'll get fooled by DUB (for simplicity, this examples uses the package _ that acutally exists):

dub --cache=local fetch _
dub --cache=local build _

Failed to find a package named '_'.

Expected Behavior

Build that package THAT IS ACTUALLY THERE from the SPECIFIED local cache.

[andre2007]

I am not sure whether I understand it correctly.
I observed following behavior:
While --cache=local downloads the dependencies to the dub project folder, dub will ignore them.

There is an open pull request to solve the issue: #1568
The solution is to download these dependencies to ./.dub/packages and to make Dub aware of them.

[Panke]

I think I have the same problem:

$ dub --cache=local fetch optional
Fetching optional 1.0.0...
Please note that you need to use dub run <pkgname> or add it to dependencies of your package to actually use/run it. dub does not do actual installation of packages outside of its own ecosystem.
$ dub --cache=local build optional
Building package optional in $PWD/.dub/packages/optional-1.0.0/optional/
Fetching vibe-d 0.8.6 (getting selected version)...
Fetching bolts 1.3.1 (getting selected version)...
Fetching stdx-allocator 2.77.5 (getting selected version)...
Unknown dependency: bolts

[Panke]

Had another look at this issue: In the case above bolts, vibe-d and stdx-allocator are placed at $PWD/.dub/packages/optional-1.0.0/optional/.dub/packages where they are subsequently not found.