Enable Grafana extensions at build time. (#11752)

* extensions: import and build

* bus: use predefined error

* enterprise: build script for enterprise packages

* poc: auto registering services and dependency injection

(cherry picked from commit b5b1ef875f905473af41e49f8071cb9028edc845)

* poc: backend services registry progress

(cherry picked from commit 97be69725881241bfbf1e7adf0e66801d6b0af3d)

* poc: minor update

(cherry picked from commit 03d7a6888b81403f458b94305792e075568f0794)

* ioc: introduce manuel ioc

* enterprise: adds setting for enterprise

* build: test and build specific ee commit

* cleanup: test testing code

* removes example hello service

scripts/build/build_enterprise.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+
+#
+#   This script is executed from within the container.
+#
+
+echo "building enterprise version"
+
+GOPATH=/go
+REPO_PATH=$GOPATH/src/github.com/grafana/grafana
+
+
+cd /go/src/github.com/grafana/grafana
+echo "current dir: $(pwd)"
+
+cd ..
+git clone -b ee_build --single-branch git@github.com:grafana/grafana-enterprise.git --depth 10
+cd grafana-enterprise
+git checkout 7fbae9c1be3467c4a39cf6ad85278a6896ceb49f
+./build.sh
+
+cd ../grafana
+
+function exit_if_fail {
+    command=$@
+    echo "Executing '$command'"
+    eval $command
+    rc=$?
+    if [ $rc -ne 0 ]; then
+        echo "'$command' returned $rc."
+        exit $rc
+    fi
+}
+
+exit_if_fail go test ./pkg/extensions/...
+
+
+if [ "$CIRCLE_TAG" != "" ]; then
+  echo "Building a release from tag $ls"
+  go run build.go -buildNumber=${CIRCLE_BUILD_NUM} -enterprise=true -includeBuildNumber=false build
+else
+  echo "Building incremental build for $CIRCLE_BRANCH"
+  go run build.go -buildNumber=${CIRCLE_BUILD_NUM} -enterprise=true build
+fi
+
+yarn install --pure-lockfile --no-progress
+
+source /etc/profile.d/rvm.sh
+
+echo "current dir: $(pwd)"
+
+if [ "$CIRCLE_TAG" != "" ]; then
+  echo "Packaging a release from tag $CIRCLE_TAG"
+  go run build.go -buildNumber=${CIRCLE_BUILD_NUM} -enterprise=true -includeBuildNumber=false package latest
+else
+  echo "Packaging incremental build for $CIRCLE_BRANCH"
+  go run build.go -buildNumber=${CIRCLE_BUILD_NUM} -enterprise=true package latest
+fi