scripts,Jenkinsfile,Makefile: upload binaries to drafted github release

This change adds a script and the needed build logic to create a draft github release and then upload the created binaries to it in order to make the actual publishing a lot less error prone.
The logic is currently that it only does this for all github tags, but not for every main build/push. This is handled by the checks in the script itself.

Change-Id: Ie172a8e4a97200de901a26a055aa5a8a54b60a2a

Jenkinsfile

@@ -135,6 +135,14 @@ node('node') {
 
       echo "Current build result: ${currentBuild.result}"
     }
+    stage('Draft Release') {
+      withCredentials([string(credentialsId: 'GITHUB_RELEASE_TOKEN', variable: 'GITHUB_TOKEN')]) {
+        lastStage = env.STAGE_NAME
+        sh 'make draft-release'
+
+        echo "Current build result: ${currentBuild.result}"
+      }
+    }
 
   }
   catch (err) {

Makefile

@@ -46,6 +46,7 @@ build-dev-deps: ## Install dependencies for builds
 	go get golang.org/x/tools/cover
 	go get github.com/go-bindata/go-bindata/go-bindata
 	go get github.com/josephspurrier/goversioninfo/cmd/goversioninfo
+	go get github.com/github-release/github-release
 
 .PHONY: lint
 lint: ## Analyze and find programs in source code
@@ -370,6 +371,10 @@ binaries-upload: ## Upload binaries to Google Storage (jenkins)
 	; done
 	cd "release/${TAG}"; gsutil -m cp -r *.zip "gs://storj-v3-alpha-builds/${TAG}/"
 
+.PHONY: draft-release
+draft-release:
+	scripts/draft-release.sh ${BRANCHNAME} "release/${TAG}"
+
 ##@ Clean
 
 .PHONY: clean

scripts/draft-release.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# usage: $0 vMAJOR.MINOR.PATCH[-rc[-*]] PATH/TO/BINARIES
+
+set -euo pipefail
+
+apps="identity uplink storagenode multinode"
+
+TAG="${1-}"
+
+if ! [[ "$TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-rc+(-.*)?)?$ ]]; then
+  echo "No tag detected, skipping release drafting"
+  exit 0
+fi
+
+FOLDER="${2-}"
+
+echo "Drafting release"
+github-release release --user storj --repo storj --tag "$TAG" --draft
+
+echo "Uploading binaries to release draft"
+for app in $apps;
+do
+  for file in "$FOLDER/$app"*.zip
+  do
+    github-release upload --user storj --repo storj --tag "$TAG" --name $(basename "$file") --file "$file"
+  done
+done
+echo "Drafting release done"