CircleCI refuses to accept a configuration file with blank lines,
claiming that it is a version 1.0 configuration file, despite the
command-line tool accepting it as a valid version 2.0 file. To please it
and restore our CI configuration to functionality, remove the blank
lines.
Note that the YAML specification does permit blank lines, even if
CircleCI does not.
In the latest release of Homebrew (which Circle CI has upgraded to for
us) the command `brew prune` has been removed.
In order to stop failing our Circle CI builds, let's remove this
invocation.
The recommended alternative is to run 'brew cleanup', but this is
unnecessary: Homebrew 2.0 already does this for us, so repeating it here
is unnecessary.
Since we are now building on Go 1.11 (as of 074a2d4f (all: use Go 1.11
in CI, 2018-08-28)) and Go 1.11 supports Go Modules [1], let's stop
using Glide, and begin using Go Modules.
This involves a few things:
* Teach the Makefile how to build go.sum files instead of glide.lock
files.
* Teach continuous integration services to build Git LFS in a
non-$GOPATH environment, since (without setting GO111MODULE=on
explicitly, which we choose not to do), this will break compiling
Git LFS, because Go 1.11 will ignore modules present in a Go
checkout beneath $GOPATH.
* In order to do the above, let's also make sure that we are
un-setting $GOCACHE in the environment, as this causes Go to work
without modules support [2].
* Because we're no longer building in a `$GOPATH`-based location,
let's instruct the CircleCI base image to archive the new location,
too.
* Similarly, teach the RPM spec to build in a non-$GOPATH location.
* By contrast, since we use dh_golang to build git-lfs binaries on
Debian, let's wait until the upstream dh_golang package is released
with support for Go 1.11 module support explicitly. Therefore, force
GO111MODULE to be on so that we can build a copy of Git LFS whose
checkout is within a $GOPATH.
Although the go.mod versions match the glide.yaml ones, the diff
attached is large because Go Modules do not vendor `_test.go` files,
whereas Glide does.
[1]: https://golang.org/doc/go1.11#modules
[2]: `GOCACHE=on` will be deprecated in Go 1.12, so this change makes
sense for that reason, too.
Co-authored-by: brian m. carlson <bk2204@github.com>
