Added link_checker script

link_checker/link_checker.py

@@ -0,0 +1,50 @@
+"""
+This script checks for image files that are not referenced anywhere in a set of markdown files.
+
+To run the script, copy it to directory (e.g. "documentation"), and run:
+python link_checker.py <folder-name>
+for example:
+python link_checker.py docs
+"""
+
+import os
+import sys
+
+# Get command-line argument containing the folder name
+directory_name = sys.argv[1]
+image_list = {}
+page_list = []
+
+# Create dictionary of all images
+for root, dirs, files in os.walk(directory_name):
+    for file in files:
+        if file.endswith((".png", ".jpg", ".gif", ".svg")):
+            image_list[file] = root
+
+# Create list of all markdown pages
+for root, dirs, files in os.walk(directory_name):
+    for file in files:
+        if file.endswith(".md"):
+            page_list.append(os.path.join(root, file))
+
+used_images = []
+unused_images = []
+
+# Find all images referred to in markdown files
+for image in image_list:
+    for page in page_list:
+        with open(page, 'r', encoding="utf8") as infile:
+            for line in infile:
+                if image in line:
+                    used_images.append(image)
+
+# Create list of unused imageswith fill paths
+for image in image_list:
+    if image not in used_images:
+        unused_images.append(image_list[image] + "\\" + image)
+
+# Print output
+if unused_images:
+    print('The following images are not used in any of the markdown files:')
+    for unused_image in unused_images:
+        print(unused_image)