Merge pull request #3215 from tstromberg/v0.30.0.release

Add scripts to generate release notes.

docs/contributors/releasing_minikube.md

@@ -2,8 +2,13 @@
 
 ## Create a Release Notes PR
 
-Assemble all the meaningful changes since the last release into the CHANGELOG.md file.
-See [this PR](https://github.com/kubernetes/minikube/pull/164) for an example.
+Collect the release notes, and edit them as necessary:
+
+```shell
+hack/release_notes.sh
+```
+
+Then merge into the CHANGELOG.md file.  See [this PR](https://github.com/kubernetes/minikube/pull/164) for an example.
 
 ## Build and Release a New ISO
 

hack/release_notes.sh

+#!/bin/bash
+
+# Copyright 2018 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -eux -o pipefail
+
+DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+
+go run "${DIR}/release_notes/listpullreqs.go"
+
+echo "Huge thank you for this release towards our contributors: "
+git log "$(git describe  --abbrev=0)".. --format="%aN" --reverse | sort | uniq | awk '{printf "- %s\n", $0 }'

hack/release_notes/listpullreqs.go

+/*
+Copyright 2018 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// listpullreqs.go lists pull requests since the last release.
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/google/go-github/github"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"golang.org/x/oauth2"
+)
+
+var (
+	token   string
+	fromTag string
+	toTag   string
+)
+
+var rootCmd = &cobra.Command{
+	Use:        "listpullreqs fromTag toTag",
+	Short:      "Lists pull requests between two versions in our changelog markdown format",
+	ArgAliases: []string{"fromTag", "toTag"},
+	Run: func(cmd *cobra.Command, args []string) {
+		printPullRequests()
+	},
+}
+
+const org = "kubernetes"
+const repo = "minikube"
+
+func main() {
+	rootCmd.Flags().StringVar(&token, "token", "", "Specify personal Github Token if you are hitting a rate limit anonymously. https://github.com/settings/tokens")
+	rootCmd.Flags().StringVar(&fromTag, "fromTag", "", "comparison of commits is based on this tag (defaults to the latest tag in the repo)")
+	rootCmd.Flags().StringVar(&toTag, "toTag", "master", "this is the commit that is compared with fromTag")
+	if err := rootCmd.Execute(); err != nil {
+		logrus.Fatal(err)
+	}
+}
+
+func printPullRequests() {
+	client := getClient()
+
+	releases, _, err := client.Repositories.ListReleases(context.Background(), org, repo, &github.ListOptions{})
+	if err != nil {
+		logrus.Fatal(err)
+	}
+	lastReleaseTime := *releases[0].PublishedAt
+	fmt.Println(fmt.Sprintf("Collecting pull request that were merged since the last release: %s (%s)", *releases[0].TagName, lastReleaseTime))
+
+	listSize := 1
+	for page := 1; listSize > 0; page++ {
+		pullRequests, _, err := client.PullRequests.List(context.Background(), org, repo, &github.PullRequestListOptions{
+			State:     "closed",
+			Sort:      "updated",
+			Direction: "desc",
+			ListOptions: github.ListOptions{
+				PerPage: 100,
+				Page:    page,
+			},
+		})
+		if err != nil {
+			logrus.Fatal(err)
+		}
+
+		seen := 0
+		for idx := range pullRequests {
+			pr := pullRequests[idx]
+			if pr.MergedAt != nil {
+				if pr.GetMergedAt().After(lastReleaseTime.Time) {
+					fmt.Printf("* %s [#%d](https://github.com/%s/%s/pull/%d)\n", pr.GetTitle(), *pr.Number, org, repo, *pr.Number)
+					seen++
+				}
+			}
+		}
+		if seen == 0 {
+			break
+		}
+		listSize = len(pullRequests)
+	}
+}
+
+func getClient() *github.Client {
+	if len(token) <= 0 {
+		return github.NewClient(nil)
+	}
+	ctx := context.Background()
+	ts := oauth2.StaticTokenSource(
+		&oauth2.Token{AccessToken: token},
+	)
+	tc := oauth2.NewClient(ctx, ts)
+	return github.NewClient(tc)
+}