Configure cross compile test builds

This issue will setup goreleaser and cross compile kubectl-trace for multiple platforms. This would be a starting point for issue #9

.gitignore

@@ -1 +1,2 @@
 _output/
+dist/

.goreleaser.yml

@@ -0,0 +1,46 @@
+project_name: kubectl-trace
+builds:
+  - goos:
+    - linux
+    - darwin
+    - windows
+    goarch:
+    - amd64
+    - 386
+    main: ./cmd/kubectl-trace
+    env:
+      - GO111MODULE=on
+      - CGO_ENABLED=0
+    ldflags: |
+      -X github.com/iovisor/kubectl-trace/pkg/version.buildTime={{ .Timestamp }}
+      -X github.com/iovisor/kubectl-trace/pkg/version.gitCommit={{ .Commit }}
+      -X github.com/iovisor/kubectl-trace/pkg/version.imageName={{ .Env.IMAGE_NAME }}
+    binary: kubectl-trace
+  - goos:
+    - linux
+    - darwin
+    - windows
+    goarch:
+    - amd64
+    - 386
+    main: ./cmd/trace-runner
+    env:
+      - GO111MODULE=on
+      - CGO_ENABLED=0
+    ldflags: |
+      -X github.com/iovisor/kubectl-trace/pkg/version.buildTime={{ .Timestamp }}
+      -X github.com/iovisor/kubectl-trace/pkg/version.gitCommit={{ .Commit }}
+      -X github.com/iovisor/kubectl-trace/pkg/version.imageName={{ .Env.IMAGE_NAME }}
+    binary: trace-runner
+
+archive:
+  format_overrides:
+    - goos: windows
+      format: zip
+
+snapshot:
+  name_template: 'master'
+
+release:
+  disable: true
+

.travis.yml

@@ -11,5 +11,6 @@ script:
 - make _output/bin/kubectl-trace
 - ./hack/ci-build-image.sh
 - make integration
+- make cross
 after_success:
 - ./hack/ci-release-image.sh

Makefile

@@ -35,9 +35,14 @@ ${kubectl_trace}:
 ${trace_runner}:
 	CGO_ENABLED=1 $(GO) build ${LDFLAGS} -o $@ ./cmd/trace-runner
 
+.PHONY: cross
+cross:
+	IMAGE_NAME=$(IMAGE_NAME) go run github.com/goreleaser/goreleaser --snapshot --rm-dist
+
 .PHONY: clean
 clean:
-	rm -Rf _output
+	$(RM) -R _output
+	$(RM) -R dist
 
 .PHONY: image/build
 image/build:

go.sum

@@ -14,7 +14,6 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/docker/distribution v2.7.0+incompatible h1:neUDAlf3wX6Ml4HdqTrbcOHXtfRN0TFIwt6YFL7N9RU=
 github.com/docker/distribution v2.7.0+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
-github.com/docker/docker v0.7.3-0.20190105115016-2ee53a42db81 h1:+8pWnXpuAH+W0IkbTfUR2BHYBs5kRrD7wATXA8FwSVQ=
 github.com/docker/docker v0.7.3-0.20190105115016-2ee53a42db81/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/spdystream v0.0.0-20181023171402-6480d4af844c h1:ZfSZ3P3BedhKGUhzj7BQlPSU4OvT6tfOKe3DVHzOA7s=
 github.com/docker/spdystream v0.0.0-20181023171402-6480d4af844c/go.mod h1:Qh8CwZgvJUkLughtfhJv5dyTYa91l1fOUCrgjqmcifM=