initial commit with stuff from arise

lib/functions/inline/build_header.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+#############                                                                                            
+# DESCRIPTION
+#############
+# Builds the page header
+#
+# This function assumes that metadata has already been fetched in the current subshell. If no metadata is present, it will do nothing.
+# 
+#############
+# Usage:
+# build_header destination.html
+
+build_header() {
+        # Verify that metadata variables are populated before running.
+        [[ $title != '' ]] && {
+                cat $config/header.html > $1
+                
+                # If enabled (default:true), add a configurable content header after the metadata header. The purpose of this is to enable a standardised header for stuff like post dates that should be on *most* pages, but can be disabled on pages the user considers special and wants to build out completely on their own.
+                [[ $content_header == "true" ]] && cat $config/content_header.html >> $1
+                
+                # Replace all tags in {{this format}} with their value. We do this using Bash pattern replacement.
+                page_contents="$(cat $1)"
+
+                page_contents="${page_contents//\{\{title\}\}/"$title"}"
+                page_contents="${page_contents//\{\{author\}\}/"$author"}"
+                page_contents="${page_contents//\{\{description\}\}/"$description"}"
+                page_contents="${page_contents//\{\{language\}\}/"$language"}"
+                page_contents="${page_contents//\{\{thumbnail\}\}/"$thumbnail"}"
+                page_contents="${page_contents//\{\{published_date\}\}/"$published_date"}"
+                page_contents="${page_contents//\{\{modified_date\}\}/"$modified_date"}"
+                page_contents="${page_contents//\{\{canonical_url\}\}/"$canonical_url"}"
+                page_contents="${page_contents//\{\{base_url\}\}/"$base_url"}"
+                page_contents="${page_contents//\{\{global_name\}\}/"$global_name"}"
+
+                echo "$page_contents" > $1
+                page_contents=""
+        }
+}