initial commit with stuff from arise

lib/functions/subshell/build_sitemap.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+#############                                                                                            
+# DESCRIPTION
+#############
+# Automatically generates a sitemap at the given file location. 
+# 
+# Note that this function will map out your site using the specified location as the root of its mapping crawl. If you define a sitemap location in a subdirectory of your website, it will only map subfolders of that location.
+#
+#############
+# Usage:
+# build_sitemap /path/to/sitemap.xml
+
+build_sitemap() (
+
+# Switch to sitemap directory
+touch $1
+sitemap=$(basename $1)
+cd $(dirname $1)
+
+# Wipe out the existing sitemap, if there is one, and declare our new sitemap
+echo '<?xml version="1.0" encoding="UTF-8"?>' > $sitemap
+echo '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' >> $sitemap
+
+# List every directory in our sitemap (except config). This makes up our sitemap since Arise is built to use directory roots as page URLs
+find . -type d -not \( -path ./config -prune \) | while read fname; do
+        
+        # Rewrite the local path from the find command as the live web URL as the <loc> tag for the sitemap standard
+        echo -e '<url>\n<loc>'"$base_url"'/'"$(echo $fname | sed -n -e 's|\.\/||p')"'</loc>' >> $sitemap
+        
+        # If this page contains a Arise-style index page with a date modified, include that as a <lastmod> for the sitemap standard
+        modified_date=''
+        get_page_metadata $fname/index.md
+        if [ -n "$modified_date" ]; then
+                echo '<lastmod>'"$modified_date"'</lastmod>' >> $sitemap
+        fi
+        clear_metadata
+
+        # Close the <url> tag for the current URL being looped through
+        echo '</url>' >> $sitemap
+done
+
+# Close up the sitemap
+echo '</urlset>' >> $sitemap
+)