From 5e87bade9b0fed36d550442651688592f042f046 Mon Sep 17 00:00:00 2001
From: Nicole Han <nicoleh@vmware.com>
Date: Thu, 10 Jun 2021 10:37:09 -0700
Subject: [PATCH] add script to squash all commits of current branch and build
 docker image

---
 Makefile           | 16 +++++++++++
 hack/git-squash.sh | 67 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)
 create mode 100755 hack/git-squash.sh

diff --git a/Makefile b/Makefile
index c02b22fb5..3f82901f5 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,9 @@ export BIN_OUT ?= $(BUILD_OUT)/bin
 # test grid at the end of a Prow job.
 export ARTIFACTS ?= $(BUILD_OUT)/artifacts
 
+# BRANCH_NAME is the name of current branch.
+export BRANCH_NAME ?= $(shell git rev-parse --abbrev-ref HEAD)
+
 -include hack/make/docker.mk
 
 ################################################################################
@@ -312,3 +315,16 @@ update-codegen:
 	hack/update-codegen.sh
 verify-codegen:
 	hack/verify-codegen.sh
+
+################################################################################
+##                                  HELPERS                                  ##
+################################################################################
+.PHONY: squash
+squash:
+	hack/git-squash.sh $(MESSAGE)
+
+.PHONY: docker-image
+docker-image:
+	docker build \
+	-f cluster/images/controller-manager/Dockerfile \
+	-t "$(IMAGE):$(BRANCH_NAME)" . \
diff --git a/hack/git-squash.sh b/hack/git-squash.sh
new file mode 100755
index 000000000..bbc9e139b
--- /dev/null
+++ b/hack/git-squash.sh
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+# Copyright 2021 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to squash all commits of the branch. 
+# Usage: "./hack/git-squash.sh <squash-branch> <base-branch> <commit-message>"
+# Note: squash-branch and base-branch are optional, default to current branch and master branch
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+if [ -n "$(git status --porcelain)" ]
+then
+    echo "git status wasn't clean, it's likely that there are changes not staged for commit - FAILED"
+    exit 1
+fi
+
+red='\033[0;31m'
+green='\033[0;32m'
+color_off='\033[0m'
+
+function print_usage {
+    echo "Usage:"
+    echo "  ./hack/git-squash.sh [squash-branch] [base-branch] \"commit-message\""
+    echo "  base-branch defaults to 'master'"
+} 
+
+if [[ $# -lt 1 || $# -gt 2 ]]; then
+    echo
+    echo -e "${red}Error${color_off} - Wrong number of arguments"
+    echo
+    print_usage
+    echo
+    exit 1
+fi
+
+current_branch=$(git rev-parse --abbrev-ref HEAD)
+
+if [[ $# -eq 1 ]]; then
+    base_branch=master
+    message=$1
+fi
+
+if [[ $# -eq 2 ]]; then
+    base_branch=$1
+    message=$2
+fi
+
+echo "Current branch: ${green}$current_branch${color_off}"
+echo "Base branch:    ${green}$base_branch${color_off}"
+
+git reset "$(git merge-base "$base_branch" "$current_branch")"
+git add -A
+git commit -m "$message"