*: Use go modules for SDK dependency management (#1566)

* go.mod,go.sum: initialize with kubernetes-1.13.4 pin comment

* Makefile,.travis.yml,hack: set go modules always on for build and CI and use GOPROXY

* Makefile: add tidy target and use as a make dependency of test/sanity

* Makefile,ci/: add targets to scaffold ansible and helm base image files

* hack/ci/setup-build-dependencies.sh: removing scm tool installation (now provided by base image) and add comment and TODO about no-op

* hack/tests,test/e2e: use SDK repo's go.mod

* test/e2e/memcached_test.go: remove unused isLocal field

* ci/tests/e2e-ansible-scaffold-hybrid.sh: use add_go_mod_replace instead of go mod edit directly

* internal/pkg/scaffold: pin versions for go mod proxy

* doc/dev: removing references to dep for building and testing the SDK repo

* CHANGELOG.md: updates for SDK's switch to go modules

Author: joelanford

.gitignore

@@ -2,6 +2,7 @@
 .glide/
 
 # Folders
+vendor
 _obj
 _test
 _output

.travis.yml

@@ -7,10 +7,12 @@ language: go
 go_import_path: github.com/operator-framework/operator-sdk
 sudo: required
 
+# go modules require xenial for mercurial TLS 1.2 support
+dist: xenial
+
 cache:
   directories:
     - $HOME/.cache/go-build
-    - $GOPATH/pkg/mod
 
 go:
 - 1.12.x
@@ -22,21 +24,21 @@ x_base_steps:
   # before_install for jobs that require dep
   - &dep_before_install
     before_install:
-      - curl -Lo dep https://github.com/golang/dep/releases/download/v0.5.3/dep-linux-amd64 && chmod +x dep && sudo mv dep /usr/local/bin/
-      - travis_retry dep ensure -v
+      - travis_retry make tidy
+
   # before_install for jobs that require go builds and do not run for doc-only changes
   - &go_before_install
     before_install:
       # hack/ci/check-doc-only-update.sh needs to be sourced so
       # that it can properly exit the test early with success
       - source hack/ci/check-doc-only-update.sh
-      - curl -Lo dep https://github.com/golang/dep/releases/download/v0.5.3/dep-linux-amd64 && chmod +x dep && sudo mv dep /usr/local/bin/
-      - travis_retry dep ensure -v
+      - travis_retry make tidy
 
   # Base go, ansbile, and helm job
   - &test
     stage: test
-    env: CLUSTER=openshift
+    env:
+    - CLUSTER=openshift
     <<: *go_before_install
     install:
       - make install

CHANGELOG.md

@@ -12,6 +12,7 @@
 - New flag `--repo` for subcommands [`new`](https://github.com/operator-framework/operator-sdk/blob/master/doc/sdk-cli-reference.md#new) and [`migrate`](https://github.com/operator-framework/operator-sdk/blob/master/doc/sdk-cli-reference.md#migrate) specifies the repository path to be used in Go source files generated by the SDK. This flag can only be used with [Go modules](https://github.com/golang/go/wiki/Modules). ([#1475](https://github.com/operator-framework/operator-sdk/pull/1475))
 - Adds `--go-build-args` flag to `operator-sdk build` for providing additional Go build arguments. ([#1582](https://github.com/operator-framework/operator-sdk/pull/1582))
 - New flags `--csv-channel` and `--default-channel` for subcommand [`gen-csv`](https://github.com/operator-framework/operator-sdk/blob/master/doc/sdk-cli-reference.md#gen-csv) that add channels to and update the [package manifest](https://github.com/operator-framework/operator-registry/#manifest-format) in `deploy/olm-catalog/<operator-name>` when generating a new CSV or updating an existing one. ([#1364](https://github.com/operator-framework/operator-sdk/pull/1364))
+- Adds `go.mod` and `go.sum` to switch from `dep` to [Go modules](https://github.com/golang/go/wiki/Modules) to manage dependencies for the SDK project itself. ([#1566](https://github.com/operator-framework/operator-sdk/pull/1566))
 
 ### Changed
 
@@ -30,6 +31,7 @@
 
 - The SDK no longer depends on a `vendor/` directory to manage dependencies *only if* using [Go modules](https://github.com/golang/go/wiki/Modules). The SDK and operator projects will only use vendoring if using `dep`, or modules and a `vendor/` dir is present. ([#1519](https://github.com/operator-framework/operator-sdk/pull/1519))
 - **Breaking change:** `ExposeMetricsPort` is removed and replaced with `CreateMetricsService()` function. `PrometheusPortName` constant is replaced with `OperatorPortName`. ([#1560](https://github.com/operator-framework/operator-sdk/pull/1560))
+- Removes `Gopkg.toml` and `Gopkg.lock` to drop the use of `dep` in favor of [Go modules](https://github.com/golang/go/wiki/Modules) to manage dependencies for the SDK project itself. ([#1566](https://github.com/operator-framework/operator-sdk/pull/1566))
 
 ### Bug Fixes