From 00dae2c3367097905543063e3d28a095698aa09e Mon Sep 17 00:00:00 2001
From: ktyl <me@ktyl.dev>
Date: Sat, 11 Mar 2023 12:16:38 +0000
Subject: [PATCH] make rss

---
 build/rss.py | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 makefile     |  7 ++++-
 2 files changed, 82 insertions(+), 1 deletion(-)
 create mode 100644 build/rss.py

diff --git a/build/rss.py b/build/rss.py
new file mode 100644
index 0000000..4922fe5
--- /dev/null
+++ b/build/rss.py
@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+
+import markdown
+import pathlib
+import sys
+import re
+
+def print_usage():
+    print("\nusage: python mkblogrss.py POSTS\n")
+    print("\n")
+    print("\t\tPOSTS\tfilepaths of blog posts")
+
+# check args for at least one file path
+if len(sys.argv) < 2:
+    print_usage()
+    sys.exit(1)
+    
+# posts are arguments from index 1 onwards
+posts = sys.argv[1:]
+
+# header and footer to enclose feed items
+header = """<?xml version="1.0" encoding="utf-8" ?>
+<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0">
+<channel>
+    <title>ktyl.dev</title>
+    <link>https://ktyl.dev/blog/index.html</link>
+    <description>mostly computer stuff!</description>
+    <atom:link href="https://ktyl.dev/blog/index.xml" rel="self" type="application/rss+xml"/>
+    """
+footer = "</channel></rss>"
+
+# regex patterns
+title_pattern = re.compile("<h1>(.+)</h1>")
+path_pattern = re.compile("(.+)\/(\d{4})\/(\d{1,2})\/(\d{1,2})\/(.+).md")
+
+def make_item(path):
+    str = "<item>\n"
+
+    # get the HTML version of the file
+    text = ""
+    with open(path) as f:
+        text = f.read()
+    html = markdown.markdown(text, extensions=["fenced_code"])
+
+    # title
+    title = ""
+    m = title_pattern.match(html)
+    title = m.group(1)
+    str += f"<title>{title}</title>\n"
+
+    # link
+    url = "/".join(pathlib.Path(path).parts[2:])
+    url = url.replace(".md", ".html")
+    link = f"https://ktyl.dev/blog/{url}"
+    str += f"<link>{link}</link>\n"
+
+    # content
+    description = html
+    description = re.sub('<', '&lt;', description)
+    description = re.sub('>', '&gt;', description)
+    str += f"<description>{description}</description>\n"
+
+    # pub date
+    date = re.sub(path_pattern, r'\2-\3-\4', path)
+    str += f"<pubDate>{date}</pubDate>\n"
+
+    str += "</item>"
+
+    return str
+
+# print everything!
+print(header)
+for p in posts:
+    print(make_item(p))
+print(footer)
+
diff --git a/makefile b/makefile
index 72489e2..9abe944 100644
--- a/makefile
+++ b/makefile
@@ -5,10 +5,12 @@ GEMINI_DIR	= $(OUT_DIR)gemini
 
 MAKE_GEMINI	= build/markdown2gemini.py
 MAKE_HTML 	= build/markdown2html.py
+MAKE_RSS	= build/rss.py
 
 PAGES = $(shell find $(SRC_DIR) -wholename "$(BLOG_SRC_DIR)*.md")
 
 HTML_TARGETS 	= $(PAGES:$(SRC_DIR)/%.md=$(HTML_DIR)/%.html)
+HTML_RSS		= $(HTML_DIR)/index.xml
 GEMINI_TARGETS	= $(PAGES:$(SRC_DIR)/%.md=$(GEMINI_DIR)/%.gmi)
 
 _dummy := $(shell mkdir -p $(HTML_DIR) $(GEMINI_DIR))
@@ -16,7 +18,10 @@ _dummy := $(shell mkdir -p $(HTML_DIR) $(GEMINI_DIR))
 $(HTML_DIR)/%.html: $(SRC_DIR)/%.md
 	python $(MAKE_HTML) $< $@
 
-html: $(HTML_TARGETS)
+$(HTML_RSS): $(PAGES)
+	pipenv run python $(MAKE_RSS) $(PAGES) > $@
+
+html: $(HTML_TARGETS) $(HTML_RSS)
 	echo $(HTML_TARGETS)
 
 gemini: