Add build for ejson2env and bump to v1.2.0

[burke]

cc @Shopify/dev-infra @catherinejones Deploying https://github.com/Shopify/ejson/pull/52

[lavoiesl]

dev up
make

mkdir -p build/bin/linux-amd64
GOPATH=/Users/seb/src/github.com/Shopify/ejson/Godeps/_workspace:$GOPATH GOOS=linux GOARCH=amd64 go build -o "build/bin/linux-amd64/ejson2env" "github.com/Shopify/ejson/cmd/ejson2env"
cmd/ejson2env/main.go:7:2: cannot find package "github.com/urfave/cli" in any of:
        /Users/seb/src/github.com/Shopify/ejson/vendor/github.com/urfave/cli (vendor tree)
        /Users/seb/.dev/go/1.8.3/src/github.com/urfave/cli (from $GOROOT)
        /Users/seb/src/github.com/Shopify/ejson/Godeps/_workspace/src/github.com/urfave/cli (from $GOPATH)
        /Users/seb/src/github.com/urfave/cli

[burke]

Try again with that commit ^

[lavoiesl]

$ dev up
$ make
$ ~/src/github.com/Shopify/ejson/rubygem/bin/ejson2env --version
ejson2env version 1.0.0
$ ~/src/github.com/Shopify/ejson/rubygem/bin/ejson2env secrets.staging.ejson
export ... # works
$ gem install pkg/ejson-1.2.0.gem
$ ejson --version
ejson version 1.2.0
$ ~/src/github.com/Shopify/ejson/rubygem/bin/ejson2env --version
^C/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/specification.rb:17:in `require': Interrupt
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/specification.rb:17:in `<top (required)>'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems.rb:1229:in `require'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems.rb:1229:in `<module:Gem>'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems.rb:116:in `<top (required)>'
        from <internal:gem_prelude>:4:in `require'
        from <internal:gem_prelude>:4:in `<internal:gem_prelude>'
$ ~/src/github.com/Shopify/ejson/rubygem/bin/ejson2env secrets.staging.ejson
^C/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/specification.rb:17:in `require': Interrupt
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems/specification.rb:17:in `<top (required)>'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems.rb:1229:in `require'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems.rb:1229:in `<module:Gem>'
        from /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/rubygems.rb:116:in `<top (required)>'
        from <internal:gem_prelude>:4:in `require'
        from <internal:gem_prelude>:4:in `<internal:gem_prelude>'

The binary versions work, but the gem version of ejson2env hangs (while ejson works).

Also, shouldn't ejson2env's version be kept in sync with ejson's?

[burke]

Yeah, I'm actually wondering now whether it would be better to make ejson2env a completely separate package output.

[DazWorrall]

Poke @burke - still low priority but there are a couple of nice quality of life bugfixes not yet released which would be great to see out in the wild (errors to stderr! actually reporting the correct version!) 🙏

[burke]

https://github.com/Shopify/ejson/pull/54