We moved chromite to require python 3.6 all the time, so update
the wrappers to match.

Bug: 997354
Test: `cros_sdk` still works
Change-Id: I78f5dc101f98a074fdc92a1f270395e2d04a2ea1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2324825Reviewed-by: Michael Mortensen <mmortensen@google.com>
Commit-Queue: Mike Frysinger <vapier@chromium.org>

This is a reland of 35b70cac.
With the recent vpython3 PATH fixes, hopefully this should pass now.

Original change's description:
> cros: switch CrOS programs to python3
>
> We start warning if people have outdated systems.
>
> Bug: 997354
> Test: `cros --help` uses python3 now
> Change-Id: I1491f1c0eea4d544cc508b461153c54c8072699d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2052243
> Commit-Queue: Mike Frysinger <vapier@chromium.org>
> Reviewed-by: Robbie Iannucci <iannucci@chromium.org>

Bug: 997354
Change-Id: Ic7e040af6a34d112cd0a1c1421cdd25bc557ee19
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2052625
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>

This reverts commit 35b70cac.

Reason for revert: causing problems for the chromium cq, e.g.
https://ci.chromium.org/p/chromium/builders/try/chromeos-amd64-generic-rel/471366
https://ci.chromium.org/p/chromium/builders/try/chromeos-arm-generic-rel/197740

Original change's description:
> cros: switch CrOS programs to python3
> 
> We start warning if people have outdated systems.
> 
> Bug: 997354
> Test: `cros --help` uses python3 now
> Change-Id: I1491f1c0eea4d544cc508b461153c54c8072699d
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2052243
> Commit-Queue: Mike Frysinger <vapier@chromium.org>
> Reviewed-by: Robbie Iannucci <iannucci@chromium.org>

TBR=vapier@chromium.org,iannucci@chromium.org,saklein@chromium.org,infra-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: Ie85691d9f847ad7edb4c9932a0788431c886fec2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 997354
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2052543Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>

We start warning if people have outdated systems.

Bug: 997354
Test: `cros --help` uses python3 now
Change-Id: I1491f1c0eea4d544cc508b461153c54c8072699d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2052243
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>

The support/ dir has only ever been used to host a single CrOS file.
We can move that to `cros` (which is the primary tool in the CrOS
world), and have the few other wrapped programs point to that.

Bug: None
Change-Id: I3ba3cc7375d357d62fb464e1b6dc37e73bc83cb5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1876639Reviewed-by: Nodir Turakulov <nodir@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>

The cros wrapper in depot_tools is a centralized wrapper for all cros
commands. Adding this to depot_tools allows developers to run the 'cros'
tool from anywhere inside a Chrome OS checkout.

BUG=none
TEST=Verify the cros wrapper works.


Review URL: https://chromiumcodereview.appspot.com/11600002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@173491 0039d316-1c4b-4281-b951-d872f2087c98

The original design of this had some issues:

1) forced targets to be importable via 'buildbot.cbuildbot', rather
  than the proper/full 'chromite.buildbot.cbuildbot'.  Scripts worked
  around this, but it's an unwanted limitation.

2) That importation requirement means that within the chroot, we've
  had to export cros_sdk *and* cros_sdk.py in the PATH.  This is
  undesirable clutter, and introduces potential errors as scripts
  localize themselves to cros_sdk.py rather than invoking cros_sdk
  (the consumers should be agnostic to the language the tool is
  written in).

3) chromite_wrapper enforced assumptions about python namespace w/in
  the targets- specifically that 'main' must always be invokable
  without any arguments.  This limits refactoring/cleanup in chromite
  via having to support ancient API assumptions (api's that weren't
  public); modern chromite has repurposed main changing the prototype,
  and using it's own wrapper doing signal handler setup, and general
  framework behaviour.  Longer term, that 'main' functor is unlikely
  to even exist.  The strong coupling chromite_wrapper forced limits
  are refactoring possibilities.

4) In modern chromite, all user consumable tools are now required to
  exist w/in chromite/bin/, and be executable and invokable.  This is
  what we want going forward.

5) Implied we want chromite_wrapper used w/in the chroot; we don't,
  thus drop all CROS_WORKON_SRCROOT awareness.

6) Exposed a chromite_wrapper invokable (that didn't work) into the
  PATH outside the chroot; this is resolved via moving it into a
  support directory and repointing symlinks to it.

At this point, if it's working with a modern chromite checkout the
script is a simple execv pass thru.  If it isn't, then it will fallback
to the old import trickery.

This has been tested against R16, R17, R18, ToT, 0.11.241.B, factory-*,
basically all branches w/in chromite without issue.




git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@128555 0039d316-1c4b-4281-b951-d872f2087c98

* Add a new version of the chromite wrapper as chromite_wrapper
* Create symlinks (chromite, cros_sdk, cbuildbot) pointing to it

TEST=inside repo checkout, run cros_sdk, chromite, cbuildbot
Review URL: http://codereview.chromium.org/7484062

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@94011 0039d316-1c4b-4281-b951-d872f2087c98