Check dead or broken links

Makefile

@@ -47,6 +47,10 @@ server:
 build:
 	@cd '$(PROJDIR)' && \
 	lektor build --output-path ../bin --buildstate-path ../build-state -f ENABLE_APPCACHE
+	@echo
+	@echo 'Checking dead links ...'
+	@python3 extras/find-dead-links.py
+	@echo
 
 deploy:
 	@echo

extras/find-dead-links.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+import os
+import re
+from contextlib import closing
+from mmap import mmap, ACCESS_READ
+
+rx_a = re.compile(br'[@(]\.\./([^/]*)')
+
+
+def regex_file(file):
+    with open(file, 'r') as f:
+        with closing(mmap(f.fileno(), 0, access=ACCESS_READ)) as d:
+            for x in re.finditer(rx_a, d):
+                yield x.group(1).decode('utf-8')
+
+
+base_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+dist_dir = os.path.join(base_dir, 'data', 'distribution')
+all_ids = None
+
+for path, dirs, files in os.walk(dist_dir):
+    if not all_ids:
+        all_ids = dirs
+    for lr_file in files:
+        if not lr_file.endswith('lr'):
+            continue
+        for link in regex_file(path + os.path.sep + lr_file):
+            if link not in all_ids:
+                short_name = os.path.basename(path) + os.path.sep + lr_file
+                print(f'dead-link: {short_name} ({link})')
+
+print('done.')