use go 1.11 modules

Dockerfile

@@ -1,10 +1,11 @@
-FROM golang:alpine as builder
-COPY . /go/src/github.com/concourse/registry-image-resource
+FROM golang:1.11-rc as builder
+COPY . /src
+WORKDIR /src
 ENV CGO_ENABLED 0
-RUN go build -o /assets/in github.com/concourse/registry-image-resource/cmd/in
-RUN go build -o /assets/out github.com/concourse/registry-image-resource/cmd/out
-RUN go build -o /assets/check github.com/concourse/registry-image-resource/cmd/check
-WORKDIR /go/src/github.com/concourse/registry-image-resource
+RUN go get -d ./...
+RUN go build -o /assets/in ./cmd/in
+RUN go build -o /assets/out ./cmd/out
+RUN go build -o /assets/check ./cmd/check
 RUN set -e; for pkg in $(go list ./...); do \
 		go test -o "/tests/$(basename $pkg).test" -c $pkg; \
 	done

go.mod

@@ -0,0 +1,26 @@
+module github.com/concourse/registry-image-resource
+
+require (
+	github.com/concourse/go-archive v0.0.0-20180803050304-8400900bd01d
+	github.com/davecgh/go-spew v1.1.0 // indirect
+	github.com/fsnotify/fsnotify v1.4.7 // indirect
+	github.com/golang/protobuf v1.1.0 // indirect
+	github.com/google/go-cmp v0.2.0 // indirect
+	github.com/google/go-containerregistry v0.0.0-20180801194910-5f7b0e489541
+	github.com/hpcloud/tail v1.0.0 // indirect
+	github.com/onsi/ginkgo v1.6.0 // indirect
+	github.com/onsi/gomega v1.4.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/sirupsen/logrus v1.0.6
+	github.com/stretchr/testify v1.2.2 // indirect
+	golang.org/x/crypto v0.0.0-20180802221240-56440b844dfe // indirect
+	golang.org/x/net v0.0.0-20180801234040-f4c29de78a2a // indirect
+	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f // indirect
+	golang.org/x/sys v0.0.0-20180802203216-0ffbfd41fbef // indirect
+	golang.org/x/text v0.3.0 // indirect
+	gopkg.in/airbrake/gobrake.v2 v2.0.9 // indirect
+	gopkg.in/fsnotify.v1 v1.4.7 // indirect
+	gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2 // indirect
+	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
+	gopkg.in/yaml.v2 v2.2.1 // indirect
+)

go.sum

@@ -0,0 +1,46 @@
+github.com/concourse/go-archive v0.0.0-20180803050304-8400900bd01d h1:Pv7E5Y4zVdyd2yAnVC2pVwMbCBPsvwoUe62rhdVn8MM=
+github.com/concourse/go-archive v0.0.0-20180803050304-8400900bd01d/go.mod h1:Xfo080IPQBmVz3I5ehjCddW3phA2mwv0NFwlpjf5CO8=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/golang/protobuf v1.1.0 h1:0iH4Ffd/meGoXqF2lSAhZHt8X+cPgkfn/cb6Cce5Vpc=
+github.com/golang/protobuf v1.1.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
+github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+github.com/google/go-containerregistry v0.0.0-20180801194910-5f7b0e489541 h1:smMOjJQk5KXcf5S0WXoKgcR0oQVdZS/7tb57VAl9+tQ=
+github.com/google/go-containerregistry v0.0.0-20180801194910-5f7b0e489541/go.mod h1:yZAFP63pRshzrEYLXLGPmUt0Ay+2zdjmMN1loCnRLUk=
+github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/onsi/ginkgo v1.6.0 h1:Ix8l273rp3QzYgXSR+c8d1fTG7UPgYkOSELPhiY/YGw=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/gomega v1.4.1 h1:PZSj/UFNaVp3KxrzHOcS7oyuWA7LoOY/77yCTEFu21U=
+github.com/onsi/gomega v1.4.1/go.mod h1:C1qb7wdrVGGVU+Z6iS04AVkA3Q65CEZX59MT0QO5uiA=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.0.6 h1:hcP1GmhGigz/O7h1WVUM5KklBp1JoNS9FggWKdj/j3s=
+github.com/sirupsen/logrus v1.0.6/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/crypto v0.0.0-20180802221240-56440b844dfe h1:APBCFlxGVQi3YDSHtTbNXRZhDEuz9rrnVPXZA4YbUx8=
+golang.org/x/crypto v0.0.0-20180802221240-56440b844dfe/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/net v0.0.0-20180801234040-f4c29de78a2a h1:8fCF9zjAir2SP3N+axz9xs+0r4V8dqPzqsWO10t8zoo=
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+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180802203216-0ffbfd41fbef h1:ESfhYoBNk2UQGmavscFPKfwmc4ZTB2+UdQYsVw6Bq9M=
+golang.org/x/sys v0.0.0-20180802203216-0ffbfd41fbef/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/airbrake/gobrake.v2 v2.0.9 h1:7z2uVWwn7oVeeugY1DtlPAy5H+KYgB1KeKTnqjNatLo=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
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