Add diffs to pages

.gitattributes

+*.html diff=pandoc

.gitlab-ci.yml

 image: alpine
 
 before_script:
-  - apk add git sed bash
+  - apk add git sed bash pandoc
 
 pages_test:
   stage: test

pages.sh

@@ -7,7 +7,10 @@ pages_dir="public"
 template="index.html"
 links=""
 
-mkdir "${pages_dir}"
+mkdir -p "${pages_dir}"
+
+# Set the diff tool
+git config diff.pandoc.textconv 'pandoc -t gfm'
 
 # Get the relevant commits from the log
 commits=$(git log --pretty=oneline | grep "Update at" | cut -d' ' -f1)
@@ -16,21 +19,32 @@ commits=$(git log --pretty=oneline | grep "Update at" | cut -d' ' -f1)
 for c in $commits
 do
     # Checkout the relevant commit
-    git checkout "$c"
+    git checkout "$c" -- "${site_dir}"
 
     # Get the date of the commit
     date=$(git show -s --format=%ai "$c")
 
+    # Show the latest commit
+    git diff "$c~1" "$c" -- "${site_dir}" > "${pages_dir}/${c}.diff.txt"
+
+    # Check if commit is empty
+    if [[ -s "${pages_dir}/${c}.diff.txt" ]]
+    then
+        diff="<a href=\"${c}.diff.txt\">diff</a>"
+    else
+        diff="no changes"
+    fi
+
     # Copy the state of the site to the pages dir
     cp -a "${site_dir}" "${pages_dir}/${date}"
 
     # Add a link to the index
-    links="${links}<li><a href=\"${date}/${main_dir}\">${date}</a></li>"
+    links="${links}<li><a href=\"${date}/${main_dir}\">${date}</a> (${diff})</li>"
 
     # Create a 'latest' symlink for the latest commit
     [ ! -e "${pages_dir}/latest" ] && ln -s "${date}" "${pages_dir}/latest"
 done
-git checkout master
+git checkout master -- site/
 
 # Create index file
 sed "s|{{body}}|${links}|g" "${template}" > "${pages_dir}/index.html"