Last mod in footer

Gemfile

@@ -22,6 +22,7 @@ gem 'nokogiri'
 # If you have any plugins, put them here!
 group :jekyll_plugins do
   gem "jekyll-datapage-generator", "~> 1.4.0"
+  gem "jekyll-last-commit", :git => "https://github.com/mporcheron/jekyll-last-commit.git"
   gem "jekyll-feed"
   gem "jekyll-menus", :git => "https://github.com/forestryio/jekyll-menus.git"
   gem 'jekyll-titles-from-headings'

Gemfile.lock

@@ -5,6 +5,14 @@ GIT
     jekyll-menus (0.6.1)
       jekyll (>= 3.6, < 5.0)
 
+GIT
+  remote: https://github.com/mporcheron/jekyll-last-commit.git
+  revision: 35b771f9c6aafd87ba92190f843daa16d6b4487f
+  specs:
+    jekyll-last-commit (0.0.3)
+      jekyll (>= 3.7, < 5.0)
+      rugged (~> 1.1)
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -79,6 +87,7 @@ GEM
     rexml (3.3.6)
       strscan
     rouge (4.3.0)
+    rugged (1.7.2)
     safe_yaml (1.0.5)
     sass-embedded (1.77.8-arm64-darwin)
       google-protobuf (~> 4.26)
@@ -100,6 +109,7 @@ DEPENDENCIES
   jekyll (~> 4.3.3)
   jekyll-datapage-generator (~> 1.4.0)
   jekyll-feed
+  jekyll-last-commit!
   jekyll-menus!
   jekyll-titles-from-headings
   nokogiri

_config.yml

@@ -42,6 +42,10 @@ permalink: /blog/:year/:month/:day/:title/
 repository: mixedrealitylab/tas-symposium
 produrl: https://symposium.tas.ac.uk/2024
 
+github:
+  repo: https://github.com/mixedrealitylab/tas-symposium/
+  link_title: "View edit on GitHub"
+
 # Social settings
 social:
     browser:
@@ -67,7 +71,11 @@ plugins:
 #  - jekyll-datapage-generator
 #  - jekyll-target-blank
 
-# Liquid config
+jekyll-last-commit:
+  date_format: '%d-%b-%Y %R'       # default: `%B %d, %Y`
+  should_fall_back_to_mtime: false # default: `true`
+  data_files_key: 'meta'           # default: meta
+
 liquid:
   error_mode: strict
   strict_variables: false

_includes/footer.html

@@ -1,4 +1,5 @@
 <p class="mb-0 py-3">
     &copy; {{ site.time | date: "%Y" }} UKRI Trustworthy Autonomous Systems Hub<br>
+    {%- include footer_lastmod.html -%}
   <!--  Designed by <a href="https://www.porcheron.uk/" title="Martin Porcheron's website">Martin Porcheron</a> and built with <a href="https://jekyllrb.com/" title="Jekyll website generator">Jekyll</a>.<br>-->
 </p>

_includes/footer_lastmod.html

@@ -1,30 +1,21 @@
-{%- assign last_modified_str = false -%}
-{%- assign last_modified_intro = false -%}
-{%- assign last_modified = false -%}
-
-{%- if page.lastmod == 'page' -%}
-
-    {% capture last_modified_str %}{{ page.last_modified_at | date_to_long_string: "ordinal" }}{% endcapture %}
-
-{%- elsif page.lastmod.type == 'data' -%}
-
-    {%- capture timestamp_date -%}{{ page.lastmod.file | data_file_last_mod: "%-d" }}{%- endcapture -%}
-    {%- capture timestamp_rest -%}{{ page.lastmod.file | data_file_last_mod: "%B %Y" }}{%- endcapture -%}
-
-    {%- if timestamp_date == "1" or timestamp_date == "21" or timestamp_date == "31" -%}
-        {%- assign suffix = "st" -%}
-    {%- elsif timestamp_date == "2" or timestamp_date == "22" -%}
-        {%- assign suffix = "nd" -%}
-    {%- elsif timestamp_date == "3" or date == "23" -%}
-        {%- assign suffix = "rd" -%}
-    {%- else -%}
-        {%- assign suffix = "th" -%}
+{%- assign newest_source = page -%}
+{%- if page.lastmod.type == "data" and page.lastmod.file -%}
+  {%- if page.last_commit.time_epoch < site.data.meta[page.lastmod.file].last_commit.time_epoch -%}
+    {%- assign newest_source = site.data.meta[page.lastmod.file] -%}
+  {%- endif -%}
+{%- elsif page.lastmod.type == "data" and page.lastmod.files -%}
+  {%- assign newest_data_file = site.data.meta[page.lastmod.files.first] -%}
+  {%- for file in page.lastmod.files -%}
+    {%- assign candidate = site.data.meta[file] -%}
+    {%- if candidate.last_commit.time_epoch > newest.last_commit.time_epoch -%}
+      {%- assign newest_data_file = candidate -%}
     {%- endif -%}
-
-    {%- capture last_modified_str -%}{{ timestamp_date }}{{ suffix }} {{ timestamp_rest }}{%- endcapture -%}
-
+  {%- endfor -%}
+  {%- if page.last_commit.time_epoch < newest.last_commit.time_epoch -%}
+    {%- assign newest_source = newest -%}
+  {%- endif -%}
 {%- endif -%}
 
-{%- if last_modified_str != false -%}
-    Last modified on {{ last_modified_str }}<br>
-{%- endif -%}
+Last modified: <a href="{{- site.github.repo -}}commit/{{- newest_source.last_commit.sha -}}" title="{{- site.github.link_title -}}" class="text-muted" target="_blank">
+  {{- newest_source.last_modified_at_formatted -}}
+</a>

program/index.html

@@ -7,6 +7,12 @@
 
 splash_title:  TAS '24 program
 
+lastmod:
+  type: data
+  files:
+    - prg_presentations.yml
+    - prg_sessions.yml
+
 menus:
   main:
     title: Program

program/workshops.md

@@ -5,6 +5,11 @@ description: >
 
 splash_title: Workshops at TAS '24
 
+lastmod:
+  type: data
+  files:
+    - workshops.yml
+
 menus:
   programme:
     title: Workshops