Create new workflow to run test of push and pull

scripts/github_pull_request.sh

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+#!/usr/bin/env bash
+
+set -e
+
+# Argument validation
+if [ $# -ne 3 ]; then
+    echo "Usage: $0 <github-repo> <pull-number> <filename>"
+    exit 1
+fi
+
+# Assign variables
+GITHUB_REPOSITORY="$1"
+GITHUB_PULL_REQUEST="$2"
+FILENAME="$3"
+
+# Move to root of project
+cd "$GITHUB_WORKSPACE"
+
+# Determine files
+FILENAME="$( realpath "${FILENAME}" )"
+
+# Skip if build number could not be determined
+if [ -z "$GITHUB_REPOSITORY" -o -z "$GITHUB_PULL_REQUEST" ]; then
+    echo "No pull request and/or repository is provided"
+    exit 1
+fi
+
+# Pull changes on PR
+echo "running on Pull Request #$GITHUB_PULL_REQUEST"
+
+# Trick the URL validator python script into not seeing this as a URL
+DUMMY_SCHEME="https"
+DIFF_URL="$DUMMY_SCHEME://patch-diff.githubusercontent.com/raw/$GITHUB_REPOSITORY/pull/$GITHUB_PULL_REQUEST.diff"
+curl -L "$DIFF_URL" -o diff.txt
+
+# Construct diff
+echo "------- BEGIN DIFF -------"
+cat diff.txt
+echo "-------- END DIFF --------"
+cat diff.txt | egrep "\+" > additions.txt
+
+echo "------ BEGIN ADDITIONS -----"
+cat additions.txt
+echo "------- END ADDITIONS ------"
+LINK_FILE=additions.txt
+
+# Validate links
+echo "Running link validation on additions..."
+python scripts/validate/links.py "$LINK_FILE"
+
+# Vebosity
+if [[ $? != 0 ]]; then
+    echo "link validation failed on additions!"
+    exit 1
+else
+    echo "link validation passed on additions!"
+fi