scripts: aosp-merger: Add script for uploading merges

Change-Id: I8dfbe7ca056c0fc9978cc5cdd2527455003c6739
diff --git a/aosp-merger/upload-merge.sh b/aosp-merger/upload-merge.sh
new file mode 100755
index 0000000..dfdaec7
--- /dev/null
+++ b/aosp-merger/upload-merge.sh
@@ -0,0 +1,64 @@
+#!/bin/bash
+#
+# Copyright (C) 2023 The LeafOS Project
+#
+# 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.
+#
+
+usage() {
+    echo "Usage ${0} -n <new-tag>"
+}
+
+# Verify argument count
+if [ "${#}" -lt 2 ]; then
+    usage
+    exit 1
+fi
+
+while [ "${#}" -gt 0 ]; do
+    case "${1}" in
+        -n | --new-tag)
+           NEWTAG="${2}"; shift
+           ;;
+        *)
+           usage
+           exit 1
+           ;;
+    esac
+    shift
+done
+
+# Check to make sure this is being run from the top level repo dir
+if [ ! -e "build/envsetup.sh" ]; then
+    echo "Must be run from the top level repo dir"
+    exit 1
+fi
+
+# Source build environment (needed for gettop)
+. build/envsetup.sh
+
+TOP="$(gettop)"
+MERGEDREPOS="${TOP}/merged_repos.txt"
+MANIFEST="${TOP}/.repo/manifests/snippets/leaf.xml"
+BRANCH=$(git -C ${TOP}/.repo/manifests.git config --get branch.default.merge | sed 's#refs/heads/##g')
+TOPIC="${NEWTAG}"
+
+for PROJECTPATH in $(cat "${MERGEDREPOS}" | grep 'merge' | cut -f3); do
+    cd "${TOP}/${PROJECTPATH}"
+
+    echo "#### Pushing ${PROJECTPATH} merge to review ####"
+    MERGE="$(git log --pretty=%H --merges -n 1)"
+    FIRST_SHA="$(git show -s --pretty=%P ${MERGE} | cut -d ' ' -f 1)"
+    SECOND_SHA="$(git show -s --pretty=%P ${MERGE} | cut -d ' ' -f 2)"
+    git push leaf HEAD:refs/for/"${BRANCH}"%base="${FIRST_SHA}",base="${SECOND_SHA}",topic="${TOPIC}"
+done