add support for local urls in gemini when text posts are present

generate.py

@@ -9,6 +9,7 @@ from os import path
 import re
 
 numbers = re.compile("[0-9]+")
+name_from_url = re.compile(r"https:\/\/helixnebula.space/(.*)/")
 out_dir = "/var/www/html/"
 gemini_out_dir = "/var/gemini/"
 base_url = "https://helixnebula.space/"
@@ -123,6 +124,16 @@ def render_places():
                 "photos_json": photos_json
             }))
 
+def sub_http_local_urls(match):
+    name = match.group(1)
+    post_names = [
+        path.basename(post).split('/')[-1][:-3] for post in glob(md_dir + "*")
+    ]
+    if name in post_names:
+        return name + ".gmi"
+    else:
+        return match.group(0)
+
 def render_gemini_index():
     template = template_environment.get_template("gemini_main")
     post_names = [
@@ -143,7 +154,10 @@ def render_gemini_places():
             content = f.read()
         process = Popen(["gemgen"], stdout=PIPE, stdin=PIPE, stderr=PIPE, text=True)
         with open(gemini_out_dir + post_name + ".gmi", "w") as f:
-            f.write(process.communicate(input=content)[0])
+            header = f"=> https://helixnebula.space/{post_name}/ Link to photography.\n\n"
+            gemtext = process.communicate(input=content)[0]
+            gemtext_with_local_urls = name_from_url.sub(sub_http_local_urls, gemtext)
+            f.write(header + gemtext_with_local_urls)
 
 def copy_files():
     call("cp js/* html/js/", shell=True)