Implement injection of source files from dependencies into parent final binaries (executed/shared libraries)

expose the implemented describe pre/post-run cmds

substitute commands in dub describe output

move command variable substitution to execution ...

This is needed as commands that need to be run need to have generator
settings available before running to avoid inconsistencies with
environment variables passed to the actually ran program and variables
used in substitution.

Fixes #2192

Fixes pre/postGenerateCommands inconsistently using dub environments
(execution was substituted including buildEnvironments, but shell cmd
did not get the build variables for substitution) - now both get
the build variables. Solved by removing code duplication. (env building)

This commit changes the behavior of `dub describe` so that describing
commands settings no longer substitutes variables. Before, known
variables would have been replaced in the output and on unknown
variables `dub describe` would fail with an error
`Target 'x' doesn't exist`

Now exposes some previously private project.d processVars functions

Fix issue 2051 failing CI

fix CLI --print-builds implementation

Fix --data-list error message with dub describe (#2195) ...

It said you can also use --data-0, but that actually will not make it
work. You need to still specify --data-list and optionally add -data-0
to make it 0 separated instead of line separated.

Quotation marks added to error message

Add environment variables to BuildSettings (#2121)

Fix #2046 - Dependencies specified with a path ignore optional settings

Refactor import. inet.path is publicly imported from inet.url, but only symbols from inet.path are used.

Disable warning that import path list is empty in single file package mode

Don't export DFLAGS & LFLAGS to nested invocations by default

Support dependencies as git url with exact commit (#1798) ...

* Support dependencies as git url with exact commit

* Compare hashes for SCM

Remove foreach variable shadowing

Replace calls to NativePath.toString() with .name ...

This has been deprecated in vibe-core and only triggers with 'library-nonet'.

Revert "support dependencies as git url with exact commit"

Support dependencies as git url with exact commit

Merge pull request #1002 from John-Colvin/sourceGlobbing ...

Source globbing
merged-on-behalf-of: Nicholas Wilson <thewilsonator@users.noreply.github.com>

disambiguate templates

typo

processVar => processVars

Deconvolute

Improve cross-compilation support (replace `version` checks by BuildPlatform runtime checks) ...

Also fixes #1249. For LDC as implicit cross compiler, the file
extensions for libraries and object files etc. don't depend on the
compiler, but solely on the target. Targets selected with `--arch` are
correctly probed by dub, so that the parsed `BuildPlatform` represents
the target platform.

Fix return type

Missing import

Fixup return types and imports

Merge branch 'master' into sourceGlobbing

dub.project: Improve variable expansion logic ...

Replace the previous buggy logic with a simpler and more efficient
implementation.

extraDependencyFiles attribute added