From 373d0945fb2fc64b3f39f12540b41efdad75a8df Mon Sep 17 00:00:00 2001
From: John Bowdre <john@bowdre.net>
Date: Sun, 25 Feb 2024 17:06:53 -0600
Subject: [PATCH] add script to create gemini capsule

---
 .gitignore         |  3 +-
 process_capsule.py | 85 ++++++++++++++++++++++++++++++++++++++++++++++
 shell.nix          | 11 ++++++
 3 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 process_capsule.py
 create mode 100644 shell.nix

diff --git a/.gitignore b/.gitignore
index d5f97c8..3215f1d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,5 @@
 /public/
 /resources/
 /.env*
-
+/capsule/
+/.certificates/
diff --git a/process_capsule.py b/process_capsule.py
new file mode 100644
index 0000000..73003fa
--- /dev/null
+++ b/process_capsule.py
@@ -0,0 +1,85 @@
+# Adapted from Will Webberley's work:
+# https://wilw.dev/blog/2023/06/01/automatic-gemini-publishing/
+# https://git.wilw.dev/wilw/wilw.dev/src/branch/main/gemini/process_capsule.py
+
+import os, datetime, re
+import frontmatter
+
+capsule_url = 'gemini://gmi.runtimeterror.dev'
+web_url = 'https://runtimeterror.dev'
+content_dir = 'content'
+email = 'blog@runtimeterror.dev'
+feed_url = 'https://runtimeterror.dev/feed.xml'
+site_name = '[runtimeterror]'
+
+# Gemini-ify hyperlinks
+def transform_links(content):
+  lines = content.splitlines()
+  pattern = re.compile(r'\[([^][]+)\]\(([^()]+)\)')
+  current_link_ref = 1
+  new_lines = []
+  for line_index, line in enumerate(lines):
+    if line.startswith('!['): continue
+    links_to_add = []
+    if not line.startswith('=>'):
+      for link_index, match in enumerate(pattern.finditer(line)):
+        description, url = match.groups()
+        line = line.replace(f'({url})', f' [{current_link_ref}]').replace(f'[{description}]', description)
+        # if URL self-references website, handle differently:
+        if not url.startswith('http') or url.startswith(web_url):
+          if web_url in url: url = url.replace(web_url, '')
+          url = capsule_url + '/' + url.replace('/', ' ').strip().replace(' ', '-') + '.gmi'
+        links_to_add.append(f'=> {url} {current_link_ref}')
+        current_link_ref += 1
+    new_lines.append(line)
+    for link in links_to_add:
+      new_lines.append(link)
+  return '\n'.join(new_lines)
+
+# Create new directories
+needed_directories = ['capsule']
+for dir in needed_directories:
+  if not os.path.exists(dir):
+    os.makedirs(dir)
+
+# Generate blog posts
+logs = []
+for dirpath, dirnames, filenames in os.walk(content_dir):
+    if 'index.md' in filenames:
+        post = frontmatter.load(os.path.join(dirpath, 'index.md'))
+        date = post['date'] if isinstance(post['date'], datetime.date) else datetime.datetime.strptime(post['date'].split('T')[0], '%Y-%m-%d')
+        content = transform_links(post.content)
+        new_content = '''
+=> {} 🏡 Home
+
+# {}
+## Posted on {}
+
+{}
+
+=> mailto:{} Reply via email
+=> {} Back to home
+        '''.format(capsule_url, post['title'], date.strftime('%Y-%m-%d'), content, email, capsule_url)
+        new_file_name = f'{os.path.basename(dirpath)}.gmi'
+        logs.append({'file': new_file_name, 'title': post['title'], 'date': date})
+        with open(f'capsule/{new_file_name}', 'w') as gem_file:
+            gem_file.write(new_content)
+
+# Generate blog index
+logs.sort(key=lambda entry: entry['date'].strftime('%Y-%m-%d'), reverse=True)
+log_index_content = '''
+=> {} 🏡 Home
+
+# {}
+
+=> {} 📲 Subscribe via RSS
+
+{}
+
+=> {} 🏡 Home
+'''.format(capsule_url, site_name, feed_url,
+  '\n'.join(['=> {} {} - {}'.format(l['file'], l['date'].strftime('%Y-%m-%d'), l['title']) for l in logs]),
+  capsule_url)
+gem_index_file = open(f'capsule/index.gmi', 'w')
+gem_index_file.write(log_index_content)
+
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..3140b63
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,11 @@
+let
+  pkgs = import <nixpkgs> {};
+in pkgs.mkShell {
+  packages = with pkgs; [
+    agate
+    hugo
+    (python3.withPackages (python-pkgs: [
+      python-pkgs.python-frontmatter
+    ]))
+  ];
+}