Darwin builders missing Go 1.4

[Ian Lance Taylor]

According to build.golang.org, three of the Darwin builders are failing due to

##### Building Go bootstrap tool.
cmd/dist
ERROR: Cannot find /go1.4/bin/go.
Set $GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4.
./make.bash: line 121: /go1.4/bin/go: No such file or directory
Build complete, duration 21.546465ms. Result: error: exit status 1

[Brad Fitzpatrick]

I've never touched the Darwin builders.

The wiki page at https://github.com/golang/go/wiki/DashboardBuilders suggests they are owned by adg@ but he's unlikely to be touching them.  Is somebody else?  David, David?

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[Dave Cheney]

Sorry, my darwin builders are offline for the next two weeks, they
crashed shortly after I got on a plane.

It looks like adg's builders don't have have GOBOOTSTRAP_ROOT set,
which is needed because $HOME is not passed through to the builder so
$HOME/go1.4 ends up being /go1.4

[Brad Fitzpatrick]

So why did it only just break in the past ~day?

[David Crawshaw]

The details adg@ left about how to log into his builders don't work.
Does anyone have physical access to the machines?

[David Symonds]

I can try to access it tomorrow.

[Brad Fitzpatrick]

Yeah, but what happened?

[David Crawshaw]

I figured access would let us work it out, not just fix it. If I had
to guess, they power cycled.

[Dave Day]

My Sydney machine died over the weekend, so there might have been a power out in the office.

[David Symonds]

I think I've fixed adg's gherkin (covering darwin-amd64 and
darwin-386). Somehow its HOME env var got cleared or wasn't set, so
the build was not finding go1.4.

Is there an easy way to clear a few of the build results so we can
verify it is working again?

[David Crawshaw]

Run the builder with -rev=bb418a59f83f or some other recent revision
to regenerate the results.

[Dave Cheney]

Use retrybuilds -builder xxx -key /path/to/xxx.key

Buy default this will clear a screenful of builds, which is probably what you want.

[Brad Fitzpatrick]

Done.

[David Crawshaw]

The darwin builders appear to have lost go1.4 again:

##### Building Go bootstrap tool.
cmd/dist
ERROR: Cannot find /go1.4/bin/go.
Set $GOROOT_BOOTSTRAP to a working Go tree >= Go 1.4.
./make.bash: line 121: /go1.4/bin/go: No such file or directory

Build complete, duration 22.531362ms. Result: error: exit status 1

On Tue, Apr 7, 2015 at 7:14 PM, David Symonds <dsym...@golang.org> wrote:

[David Symonds]

Yeah, we lost power last night, and the builder is not correctly set
up to recover itself. That might have to wait until adg's return. I'll
get it going again manually.