create RCE package publishing script

closes LF-371
flag=none
qa risk: low

test plan:
-use the flags to skip certain parts of the script
 during testing
-run the script a few times, trying each of the
 code paths
-if you want to actually send the alerts, change the
 channel to #bottest

Change-Id: I81745e76595a2459214357b90371d05d0878c46c
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/323199
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Jackson Howe <jackson.howe@instructure.com>
QA-Review: Jackson Howe <jackson.howe@instructure.com>
Product-Review: Jake Oeding <jake.oeding@instructure.com>

packages/canvas-rce/package.json

@@ -47,7 +47,8 @@
     "fmt:fix": "prettier --write '**/*.js*' '**/*.ts*'",
     "clean": "rm -rf lib && yarn clean:es && rm -rf coverage && yarn demo:clean",
     "clean:es": "rm -rf es",
-    "generate-svgs": "yarn build:cjs && scripts/generateSvgs.js && prettier --write src/rce/plugins/instructure_equation/MathIcon/svgs.js"
+    "generate-svgs": "yarn build:cjs && scripts/generateSvgs.js && prettier --write src/rce/plugins/instructure_equation/MathIcon/svgs.js",
+    "publishToNpm": "scripts/publishToNpm.sh"
   },
   "keywords": [
     "canvas",

packages/canvas-rce/scripts/publishToNpm.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+# This script will remind you to update the change log and
+# to bump the version number of the package
+
+# It will then check that you're logged into AWS (which
+# is required to send the Slack notification)
+
+# After those valiations are complete, it will prompt you
+# to log into npm and it will then publish the package
+
+# If the publish succeeds, it will send a Slack notification
+
+# You can disable various steps of the script for dry runs
+# by setting the following when running the script:
+#   SKIP_NPM_LOGIN=1
+#   SKIP_NPM_PUBLISH=1
+#   SKIP_ALERT=1
+
+function prompt {
+    read -p "$1 (Y/N): " confirm &&
+    if [[ ! "$confirm" =~ ^[Yy]+([eE][sS])?$ ]]; then
+        echo -e "\n⚠️  $2 ⚠️\n"
+        exit 1
+    fi
+}
+
+prompt "Did you update CHANGELOG.md?" "Update CHANGELOG.md before publishing to NPM."
+
+prompt "Did you bump the version number in package.json?" "Bump the version number in package.json before publishing to NPM."
+
+if [ -z "$SKIP_ALERT" ]; then
+    # runs the get-user command and throws away output
+    # checks for nonzero exit code to determine if the
+    # user is logged in or not
+    aws iam get-user > /dev/null 2>&1
+    if [[ ! $? -eq 0 ]]; then
+        echo -e "\n⚠️  Please log into AWS and try again. ⚠️\n"
+        exit 1
+    fi
+else
+    echo "Would have checked if you were logged into AWS"
+fi
+
+if [ -z "$SKIP_NPM_LOGIN" ]; then
+    echo -e "\nLogging into NPM...\n"
+    npm login
+else
+    echo "Would have logged into NPM"
+fi
+
+if [ -z "$SKIP_NPM_PUBLISH" ]; then
+    echo -e "\nPublishing to NPM...\n"
+    npm publish
+else
+    echo "Would have published to NPM"
+fi
+
+if [[ ! $? -eq 0 ]]; then
+    echo -e "\n🚨  Publish failed. Please try again. 🚨\n"
+    exit 1
+fi
+
+PACKAGE_VERSION=$(cat package.json | grep "version" | awk '{print $2}' | sed 's/[",]//g')
+CHANGELOG_LINK="<https://gerrit.instructure.com/plugins/gitiles/canvas-lms/+/refs/heads/master/packages/canvas-rce/CHANGELOG.md | here>"
+SLACK_MESSAGE="canvas-rce version $PACKAGE_VERSION has been published to NPM \n\nSee the full list of changes $CHANGELOG_LINK."
+
+if [ -z "$SKIP_ALERT" ]; then
+    (
+      aws --region us-east-1 sqs send-message \
+        --queue-url https://sqs.us-east-1.amazonaws.com/636161780776/slack-lambda \
+        --message-body "{\"channel\":\"#ask-learning-foundations\",\"username\":\"RCE Publish\",\"text\":\"$SLACK_MESSAGE\"}"
+    ) || echo "Failed to send Slack message."
+else
+    echo "Would have sent a Slack message:"
+    echo -e $SLACK_MESSAGE
+fi