Review and document module dub.dub. ...

Moves the module name determination code to dub.internal.utils and makes DependencyVersionResolver private, as that will probably change considerably in the future (no deprecation path for this, because it's unlikely to be used outside out DUB).

Deprecates Dub.list(String)ImportPaths, as these functions are fundamentally flawed, because they are taking just a subset of the possible fields in GeneratorSettings. listProjectData is the designated successor.

Review and document dub.packagesupplier.

Avoid any of the newly deprecated symbols. ...

The only exception is the serialization code, which still iterates over deprecated fields, as well as Package.dependencies, which will be replaced in the next commit.

Avoid API breakage vs. 0.9.24.

Store path based selections relative to the root package.

Store path based dependencies in dub.selections.json. Fixes #772.

Filter out invalid dependencies before starting the resolution process. ...

Package versions for which it is not possible to get an actual package description (e.g. due to non-existent paths or semantic errors in the package description) are now excluded from the dependency resolution process. Before this, they could erroneously be picked, resulting in an malformed dependency tree.

Implement new optional dependency semantics. Fixes #361. ...

If no dub.selections.json file exists yet, optional dependencies will stay deselected by default, unless the "default" flag is set. If dub.selections.json exists, optional dependencies will only be used if present in that file, independently of their local installation state.

Add workaround for DMD 2.070.0 AA regression.

Properly handle path based selections for manual --root paths.

fix Issue #528 - fetch doesn't work for recently updated package ...

Revert "store metadata cache on disk"

This reverts commit 161aad0.

We only ask the package suppliers for metadata when upgrading or
searching a specific package version. In particular building an already
fetched package does not ask the package suppliers (only the package
manager responsible for locally installed packages).

In all cases where we get data from a package supplier we want to get
the latest available information. Therefor it doesn't make sense to
cache any metadata from the package suppliers on disk.

Not sure whether we still need the in memory metadata cache (e.g. for
multiple queries during dependency resolution).

Fix class Dub's public default constructor.

Fix interactive setting of package recipe format.

Centralize the logic to determine the latest available package version.

Implement interactive "init" command.

Implement "dub convert" to convert JSON<->SDLang.

Fetch packages one directory deeper.

allow to specify ddox tool ...

- can be used to customize the ddox tool (and it's output)
- assumes similar commands/behavior

better support concurrent fetch of package ...

- other dub might have already released the lock
  leading to another (failing) fetch of a package

fix #674 - cache needs to be locked for concurrent dub runs ...

- implement lockFile/tryLockFile using mkdir
- use lockFile to synchronize package download

Work around quadruple search requests being executed. See #663.

implement search command ...

- queries all package suppliers and outputs any found package

enable merging of coverage reports to account for tests

Fix reading settings.json in --bare mode. ...

Failure to read the configuration caused DUB to crash with an exception in --bare mode.

Implement --skip-registry switch. Fixes #580.

Add support for a user defined default compiler. See #678. ...

A "defaultCompiler" field in the user or system wide DUB configuration file can be used for that now.

Fix naming convention of FileMode enum. ...

Also some minor code style fixes.

Add SDL support to "dub init". ...

SDL is now the default format and "-f json" can be used to force JSON.

Allow comma-separated list in --data, for brevity.

Add --data-0 to output --data= info null-delimited for (ex.) xargs -0