updates for script to update last modified

_posts/2022-07-10-First-Blog-Post.md

@@ -3,7 +3,7 @@ layout: post
 title: First Blog Post
 description: "A sample blog post for JekyllExample.com"
 date: '2022-07-10T23:00:15+00:00'
-last_modified_at: '2024-05-16T08:05:00+00:00'
+last_modified_at: '2024-07-01T15:58:25+00:00'
 permalink: first-blog-post
 image: BlogPost-1.jpg
 categories: [ Sample ]

_posts/2022-11-01-Non-featured-blog-post.md

@@ -8,6 +8,7 @@ image: BlogPost-2.jpg
 categories: [ Sample ]
 featured: false
 comments: false 
+last_modified_at: '2024-07-01T15:58:25+00:00'
 ---
 
 This is the second blog post, the difference is that this one is not featured.

_posts/2023-01-31-Getting-started-with-Jekyll.md

@@ -3,7 +3,7 @@ layout: post
 title: Getting started with Jekyll
 description: A simple list of steps to get started with Jekyll. 
 date: '2023-01-31T10:00:15+00:00'
-last_modified_at: '2024-05-16T08:05:00+00:00'
+last_modified_at: '2024-07-01T15:58:25+00:00'
 permalink: getting-started-with-jekyll
 image: BlogPost-3.jpg
 categories: [ Jekyll, Tutorial ]

_posts/2023-02-01-Easy-instructions-to-install-jekyll.md

@@ -2,7 +2,7 @@
 layout: post
 title: Easy instructions for installing Jekyll 
 date: '2023-02-01T10:00:15+00:00'
-last_modified_at: '2024-05-16T08:05:00+00:00'
+last_modified_at: '2024-07-01T15:58:25+00:00'
 permalink: easy-installation-instructions-for-jekyll
 description: A blog post that provides easy instructions for installing Jekyll.
 image: BlogPost-4.jpg

_posts/2024-01-17-Sample-Jekyll-Sites.md

@@ -3,7 +3,7 @@ layout: post
 title: Example Jekyll Sites based on this Repository
 description: A list of sites built on this template
 date: '2023-02-01T10:00:15+00:00'
-last_modified_at: '2024-05-16T08:05:00+00:00'
+last_modified_at: '2024-07-01T15:58:25+00:00'
 permalink: sample-jekyll-sites
 image: 
 categories: [ Jekyll, Sample, Example ]

_posts/2024-04-18-Install-and-run-jekyll-on-ubuntu.md

@@ -8,6 +8,7 @@ image: BlogPost-4.jpg
 categories: [ Jekyll, Tutorial ]
 featured: true
 comments: false 
+last_modified_at: '2024-07-01T15:58:25+00:00'
 ---
 ## *This post is still a work in progress as of 05/17/2024*
 

_posts/2024-06-21-structured-content-in-jekyll.md

@@ -2,7 +2,7 @@
 layout: post
 title: Structured Content in Jekyll
 date: '2024-06-21T10:00:15+00:00'
-last_modified_at: '2024-06-24T14:44:00+00:00'
+last_modified_at: '2024-07-01T15:58:25+00:00'
 permalink: structured-content-in-jekyll
 description: A blog post showing how Structured Content can be leveraged using this JekyllExample project to help get your content out to the masses. 
 image: BlogPost-5.jpg

_scripts/update_last_modified_at.sh

@@ -0,0 +1,86 @@
+#!/bin/bash
+
+# This script is used to update all your _posts last_modified_at attribute to the current date/time. 
+# You typically want to do this when you update the structure on your site, not every time you create a new post
+# To do this, you need to be in a prompt do the following to things
+# Make the script executable: chmod +x ../_scripts/update_last_modified.sh.
+# Run the script from the _scripts directory: ../_scripts/update_last_modified.sh.
+
+
+# Set the directory containing your Jekyll posts
+POSTS_DIR="../_posts"
+
+# Set the new last modified date (current date and time in ISO 8601 format)
+NEW_DATE=$(date -u +"%Y-%m-%dT%H:%M:%S+00:00")
+
+# Function to remove BOM from a file
+remove_bom() {
+  local file="$1"
+  if [ "$(head -c 3 "$file")" = $'\xef\xbb\xbf' ]; then
+    tail -c +4 "$file" > "$file.nobom" && mv "$file.nobom" "$file"
+    echo "Removed BOM from $file"
+  fi
+}
+
+# Loop through each markdown file in the posts directory
+for file in "$POSTS_DIR"/*.md; do
+  echo "Processing file: $file"
+
+  # Remove BOM if present
+  remove_bom "$file"
+
+  temp_file=$(mktemp)
+  inside_front_matter=false
+  last_modified_at_present=false
+  last_modified_at_line="last_modified_at: '$NEW_DATE'"
+  front_matter=()
+  content=()
+
+  while IFS= read -r line; do
+    if [[ "$line" == "---" ]]; then
+      if $inside_front_matter; then
+        # Closing front matter
+        inside_front_matter=false
+        if ! $last_modified_at_present; then
+          front_matter+=("$last_modified_at_line")
+        fi
+        front_matter+=("$line")
+      else
+        # Opening front matter
+        inside_front_matter=true
+        front_matter+=("$line")
+      fi
+    elif $inside_front_matter; then
+      # Check for existing last_modified_at and remove it
+      if [[ "$line" == "last_modified_at:"* ]]; then
+        last_modified_at_present=true
+        # Update the line to the new date
+        front_matter+=("$last_modified_at_line")
+      else
+        front_matter+=("$line")
+      fi
+    else
+      content+=("$line")
+    fi
+  done < "$file"
+
+  # Ensure last_modified_at is in the front matter if it wasn't already present
+  if ! $front_matter_complete; then
+    if ! $last_modified_at_present; then
+      front_matter+=("$last_modified_at_line")
+    fi
+    front_matter+=("---")
+  fi
+
+  # Write the front matter and content back to the file
+  {
+    printf "%s\n" "${front_matter[@]}"
+    printf "%s\n" "${content[@]}"
+  } > "$temp_file"
+
+  # Overwrite the original file with the fixed content
+  mv "$temp_file" "$file"
+  echo "Updated last_modified_at date to '$NEW_DATE' in $file"
+done
+
+echo "All files have been updated."