[gsoc] DUB - Ideas

[Joseph Rushton Wakeling]

On Thursday, 28 February 2019 at 15:50:49 UTC, Seb wrote:
> @community: what features do you miss the most from DUB?

(1) Support for library maintainers' test requirements

Specifically: when a library has dependencies of its own, one 
wants to be sure the library stays compatible with the stated 
minimum supported version, because changing that could be a 
breaking change for downstreams.

With this in mind it would be useful to have:

   * a command to downgrade all dependencies in dub.selections.json
     to the minimum supported (including dependencies of 
dependencies)

   * a flag for build and test commands to request that the minimum
     versions of all dependencies be used

   * a flag to specify the maximum kind of version change `dub 
upgrade`
     can perform: patch, minor, or major.

(2) Cleanly and clearly separate between test options and build 
options

Specifically, this involves fixing the problems with `dub test` 
when the `--build` flag is used.

Example: if one runs `dub test --build=release` then intuitively 
one would expect (unit)tests to be run with release flags and 
optimizations enabled. In fact no unittests are run, because 
`--build=release` mandates a specific set of D flags that does 
not include `-unittest`.