This replaces the hidden --no-package-symlinks flag.

Closes #1340

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2250643003 .

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2184303002 .

This splits Source into two classes, Source and LiveSource. The former
is completely independent of the system cache directory, and mostly
contains source metadata and logic about manipulating descriptions.

SourceRegistry now deals strictly in Sources, with LiveSources being
handled by SystemCache. This means that classes like Pubspec and
LockFile no longer have transitive references to the system cache
directory.

This will also make it possible to clean up PackageName equality logic
by making PackageNames track their concrete Sources rather than just
their source names.

See #912

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2044253003 .

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1585513002 .

Closes pub#22

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1277773002 .

* The package spec's reference to the entrypoint package was pointing to
  the hosted cache rather than the package's directory. This was caused
  by the package graph's instance of the entrypoint package incorrectly
  pointing to the cache; the graph now re-uses `entrypoint.root`.

* The package spec didn't contain relative paths for relative path
  dependencies. This was being missed by our tests because the package
  spec parser was automatically converting all paths to absolute at
  parse-time.

Closes #1294

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1228093003 .

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//805393002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42885 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//581283003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40559 260f80e4-7a28-3924-810f-c04153c831b5

This will help the editor test against the no-symlink behavior before
we roll it out to the world.

BUG=20253
R=danrubel@google.com, rnystrom@google.com

Review URL: https://codereview.chromium.org//427853002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@38702 260f80e4-7a28-3924-810f-c04153c831b5

This means commands don't have to declare that they need.
It also ensures the pubspec isn't parsed until JSON output has been selected.

BUG=http://dartbug.com/20066, http://dartbug.com/20065
R=nweiz@google.com

Review URL: https://codereview.chromium.org//397843005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@38291 260f80e4-7a28-3924-810f-c04153c831b5

This is useful for ensuring that a package's dependencies' lower bounds are
correct.

R=rnystrom@google.com
BUG= https://code.google.com/p/dart/issues/detail?id=15670

Review URL: https://codereview.chromium.org//365993007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@38220 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//372123002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@38102 260f80e4-7a28-3924-810f-c04153c831b5

R=sigmund@google.com

Review URL: https://codereview.chromium.org//364973002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37968 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=18538
R=nweiz@google.com

Review URL: https://codereview.chromium.org//354763006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37963 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=17252

Review URL: https://codereview.chromium.org//363573002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37915 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=18538
R=nweiz@google.com

Review URL: https://codereview.chromium.org//331593012

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37832 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=15736

Review URL: https://codereview.chromium.org//356953005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37761 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=13658

Review URL: https://codereview.chromium.org//344413004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37754 260f80e4-7a28-3924-810f-c04153c831b5

This change does three things:
* Splits out a WrappedException class from ApplicationException.
* Uses fail() pervasively rather than new ApplicationException() everywhere.
* Moves exception classes from utils.dart to exceptions.dart.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//354663008

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37713 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=10582
R=nweiz@google.com

Review URL: https://codereview.chromium.org//344493003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37464 260f80e4-7a28-3924-810f-c04153c831b5

It only runs scripts from the entrypoint package's "bin" directory,
but it's a start.

BUG=https://code.google.com/p/dart/issues/detail?id=18536
R=nweiz@google.com

Review URL: https://codereview.chromium.org//301063002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37292 260f80e4-7a28-3924-810f-c04153c831b5

R=brianwilkerson@google.com, jmesserly@google.com, nweiz@google.com

Review URL: https://codereview.chromium.org//260963007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@35837 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=16909
RELNOTE=Add a "pub deps" command to show package dependencies.
R=nweiz@google.com

Review URL: https://codereview.chromium.org//217343004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@34662 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=17707

Review URL: https://codereview.chromium.org//204983022

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@34330 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=15018
R=nweiz@google.com

Review URL: https://codereview.chromium.org//184113007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@33450 260f80e4-7a28-3924-810f-c04153c831b5

* missing returns
* unused imports

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//184823012

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@33298 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=15924

Review URL: https://codereview.chromium.org//167103003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@32818 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=16265
R=nweiz@google.com

Review URL: https://codereview.chromium.org//136063005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@32575 260f80e4-7a28-3924-810f-c04153c831b5

BUG=
R=nweiz@google.com

Review URL: https://codereview.chromium.org//138723005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@32376 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=14673
R=nweiz@google.com

Review URL: https://codereview.chromium.org//141113011

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@32131 260f80e4-7a28-3924-810f-c04153c831b5

We're seeing some user reports of exceptions where the type is
ambiguous.

R=rnystrom@google.com
BUG=

Review URL: https://codereview.chromium.org//149063002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@32092 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=15734
R=nweiz@google.com

Review URL: https://codereview.chromium.org//122483003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@31566 260f80e4-7a28-3924-810f-c04153c831b5

Specifically, when run with "--trace" or "--verbose", pub will capture its stack
chains and report them along with errors. Otherwise it should behave identically
to before.

R=rnystrom@google.com
BUG=8842

Review URL: https://codereview.chromium.org//113453005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@31176 260f80e4-7a28-3924-810f-c04153c831b5

R=floitsch@google.com, nweiz@google.com, rnystrom@google.com

Review URL: https://codereview.chromium.org//94843002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@30809 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://codereview.chromium.org//94593002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@30758 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=14677

Review URL: https://codereview.chromium.org//49293003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@30006 260f80e4-7a28-3924-810f-c04153c831b5

Attempt to fix most uses of the deprecated features.

R=floitsch@google.com, nweiz@google.com, rnystrom@google.com

Review URL: https://codereview.chromium.org//48483002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@29628 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://codereview.chromium.org//49453003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@29501 260f80e4-7a28-3924-810f-c04153c831b5

BUG=
R=rnystrom@google.com

Review URL: https://codereview.chromium.org//50533005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@29461 260f80e4-7a28-3924-810f-c04153c831b5