"git ls-files" doesn't recurse into submodules, so we need to do so
manually.

Closes #1523

R=rnystrom@google.com

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

This allows PackageName equality to include description equality, and it
substantially cleans up other logic dealing with sources.

See #912

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//2079303003 .

We had a logic error wherein we were checking dependencies only
for cached packages when we should have been checking them only
for *uncached* packages.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1956543002 .

"git ls-files" doesn't natively resolve symlinks, so this adds some
logic to do so manually. This brings the behavior of uploading from a
Git repo in line with non-Git uploading.

We still don't have a multipart parser in Dart, so we unfortunately have
to way of writing automated tests that the tarballs are created as
expected. I did verify this behavior locally, though.

Closes #1400

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1862833002 .

R=rnystrom@google.com

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

This folds the distinction between "resolved" and "unresolved"
descriptions into the distinction between PackageIds and PackageRefs. In
other words, all PackageIds now have resolved descriptions and all
PackageRefs now have unresolved descriptions. This makes it easier to
track which descriptions are resolved and express resolution constraints
via the type system.

This also restricts the creation of PackageRefs and PackageIds to source
classes, which helps ensure that the description format—which is an
implementation detail—doesn't leak into surrounding code.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1528523003 .

If the root directory of a package is .gitignored, it will no longer be
considered to be a "git package", since that just means that it'll be
seen to contain no files at all.

Closes #1321

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1317043002 .

Pub won't upload gitignored files, so its validation shouldn't consider
them to exist either.

See #1321

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1310253007 .

Closes #1296

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1233533002 .

* Normalize paths before they're passed to dart2js. It handles "." and
  ".." path components poorly.

* Ensure that paths emitted by list-package-dirs are always absolute and
  normalized for backwards-compatibility with the existing protocol.

* Make Package.listFiles work for an in-memory package.

* Fix an error message expectation in packages_file_test.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1228683003 .

The solver was choking when pub's implicit dependencies on barback
failed and had to be backtracked.

R=rnystrom@google.com
TBR

Review URL: https://codereview.chromium.org//1142693002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@45832 260f80e4-7a28-3924-810f-c04153c831b5

The idea of this change is to eagerly check, before selecting a package version,
whether that version is compatible with the existing dependencies. This avoids a
bunch of unnecessary backtracking, and makes the progression of the solver more
comprehensible when

R=rnystrom@google.com
BUG= dartbug.com/17429

Review URL: https://codereview.chromium.org//1140083005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@45799 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//602253002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40849 260f80e4-7a28-3924-810f-c04153c831b5

(Still use it for publishing.)

BUG=https://code.google.com/p/dart/issues/detail?id=9841
R=nweiz@google.com

Review URL: https://codereview.chromium.org//599303002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40661 260f80e4-7a28-3924-810f-c04153c831b5

BUG=20859
R=rnystrom@google.com

Review URL: https://codereview.chromium.org//583853002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40612 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=18539
R=nweiz@google.com

Review URL: https://codereview.chromium.org//566093003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@40471 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=20483

Review URL: https://codereview.chromium.org//475093003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39787 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=20628
R=nweiz@google.com

Review URL: https://codereview.chromium.org//485893008

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39502 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//489943002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39437 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
BUG=20482

Review URL: https://codereview.chromium.org//482053002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@39424 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//345413004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37616 260f80e4-7a28-3924-810f-c04153c831b5

R=rnystrom@google.com
TBR

Review URL: https://codereview.chromium.org//332003003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37528 260f80e4-7a28-3924-810f-c04153c831b5

In r37514 I incorrectly assumed that the problem was Directory.list
when in fact it's git.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//349503003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37527 260f80e4-7a28-3924-810f-c04153c831b5

In particular, this makes barback and the "pub lish" validators use gitignore
rules.

R=rnystrom@google.com
BUG=12102, 11198

Review URL: https://codereview.chromium.org//342553002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@37469 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

BUG=https://code.google.com/p/dart/issues/detail?id=5391
RELNOTE=Add "pub cache repair" command to re-install cached packages.
R=nweiz@google.com

Review URL: https://codereview.chromium.org//228703006

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@35111 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

1. Take overrides into account.
2. Do get if a cache package is not installed.

BUG=http://dartbug.com/14590, http://dartbug.com/15180
R=nweiz@google.com

Review URL: https://codereview.chromium.org//83173011

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@30832 260f80e4-7a28-3924-810f-c04153c831b5

- Parse them in pubspec.
- Pass them to solver.
- Warn when they are used.
- Error on publish.

BUG=https://code.google.com/p/dart/issues/detail?id=8566
R=nweiz@google.com

Review URL: https://codereview.chromium.org//74013007

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@30376 260f80e4-7a28-3924-810f-c04153c831b5

The code for parsing the package descriptions had gotten increasingly
hacky. This unhacks it.

R=nweiz@google.com

Review URL: https://codereview.chromium.org//72193002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@30264 260f80e4-7a28-3924-810f-c04153c831b5

BUG=https://code.google.com/p/dart/issues/detail?id=7351
R=nweiz@google.com

Review URL: https://codereview.chromium.org//26284002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@28330 260f80e4-7a28-3924-810f-c04153c831b5

BUG=
R=nweiz@google.com

Review URL: https://codereview.chromium.org//23702061

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@27977 260f80e4-7a28-3924-810f-c04153c831b5

The user-visible effect of this is to make operations that only look at part of
a pubspec work if other parts of the pubspec are somehow invalid. This is
particularly important for the following scenario:

1. We release a version of pub in SDK 1.0.0 that parses pubspec field "foo" as
   an integer.

2. Sally uploads version 0.1.0 of her package, libsally.

3. We release a new version of pub in SDK 1.1.0 that supports strings in "foo".

4. Sally uploads libsally 0.2.0, which uses a string in "foo". The new version
   of libsally has an SDK constraint of ">= 1.1.0", since it uses the new "foo"
   feature.

5. Tom is using SDK 1.0.0 and runs "pub install" in a package that depends on
   libsally.

Everyone's done everything right here; we made a backwards-compatible pubspec
change, Sally chose the correct SDK constraint, and Tom has a dependency on a
package that has a compatible version available.

However, prior to this change, Tom's "pub install" would crash. His outdated
version of pub would try and fail to parse libsally 0.2.0's "foo" field, and his
version resolution would crash. With this change, it will only attempt to parse
the SDK constraint portion of Sally's pubspec, and ignore anything else it
doesn't understand.

R=rnystrom@google.com
BUG=

Review URL: https://codereview.chromium.org//24246002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@27784 260f80e4-7a28-3924-810f-c04153c831b5

BUG=
R=nweiz@google.com

Review URL: https://codereview.chromium.org//22941002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@26040 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//21147002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@25648 260f80e4-7a28-3924-810f-c04153c831b5

R=ajohnsen@google.com

Review URL: https://codereview.chromium.org//18356011

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@24964 260f80e4-7a28-3924-810f-c04153c831b5

R=nweiz@google.com

Review URL: https://codereview.chromium.org//18143002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@24555 260f80e4-7a28-3924-810f-c04153c831b5

Review URL: https://codereview.chromium.org//16034002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@23182 260f80e4-7a28-3924-810f-c04153c831b5