Avoid downloading base package for non-existent sub package references, if possible. ...

When it can be proven that a certain sub package doesn't exist (this is the case when the base package descriptions doesn't contain any path based dependencies), the dependency will be skipped as invalid instead of downloading the whole package to search for the sub package there.

Disallow :short_hand references to sub packages from within sub packages. See #334. ...

Until the semantics are defined, disallow this use of the short hand syntax. The two
semantic possibilities for ":subpack2" within a sub package "pack:subpack1" are either "pack:subpack2" or "pack:subpack1:subpack2". Both could be more or less valid options.

Output all possible source/import files for "dub describe". Fixes #185. ...

Files that are not used for the current configuration or platform are output with an "unused" prefix (e.g. "unusedSource").

Recognize the "systemDependencies" field.

Ensure all files end with a newline

Removed trailing whitespace

Converted line endings from CRLF to LF

Various improvements. Fixes #268. ...

- Treat all package paths as ending with a slash to fix path comparison issues
 - Avoid re-reading all packages twice when building, see also #325.
 - Fix bogus "License in subpackage different" warning

Support :subpackage shorthand syntax. Fixes #315. ...

This works for dependencies, as well as for referencing sub packages on the command line.

Add a "commit" prefix for descendant versions.

Always treat tag descendant commits as build metadata. ...

This avoids having to constantly perform "dub upgrade --prerelease" when new commits get added to a branch that descends from a tagged pre-release version.

For "dub run", change the CWD only if non-empty. Fixes #272.

Include lightweight GIT tags when determining local package versions.

Automatically add "mainSourceFile" as a source file. Fixes #258.

Prefer version tags to branches when determining package versions using GIT.

Fix validating the configuration graph. ...

getTopologicalPackageList(), which was used before, could yield a different set of packages.

Add path based sub packages to Package.m_subPackages, too.

Let Dependency.toString() also contain the optional/path properties. ...

versionString is changed into a public property to support the use cases where only the version range is expected.

Preparing dub select command. dub select will select the currently used versions and write them to a file, so that dub can later use this information to rebuild this exact state. This will also be used to override dependencies with either branch versions or not matching versions (to resolve conflicts). (All of this if to be implemented). ...

Other changes:
- Added Version.UNKNOWN, which could be later used for undetermined package versions instead of ~master.
- Added Dependency to/fromJson.
- Added Dependency alias "*" for ">=0.0.0".

Removing not needed check for git version when installing a package from the registry.

Also warn about using certain "buildOptions" in addition to "dflags".

Support --combined and --force flags for "dub test". Fixes #247.

Fix triggering an assertion when storing dependencies in advanced format. ...

The code was assuming that such dependencies had always exact versions, which is of course not always true (it should, however, be true for dependencies with a "path" field).

Fix condition for testing if a package description exists.

Ensure a deterministic file order when passing source files to the compiler. ...

This should avoid "random" triggering of compiler bugs that depend on the order of source files. See also rejectedsoftware/vibe.d#493.

Always use lower case package names internally, regardless of the package description.

Change path based sub package definitions to use a string instead of an object entry.

Remove main file detection for library configurations and don't let <packname>/<packname>.d match as a main file anymore.

The externally defined sub-packages don't have the name declared in the base package. This eliminates the double definition of a sub-packages name.

Fix Package.toJson and improve diagnostic output in case of JSON parsing errors.