Update frontmatter helper script (#828)

Author: paoloredis

insert_url_frontmatter.bash

@@ -0,0 +1,28 @@
+#!/bin/bash
+# example usage ./version_frontmatter_helper.bash "content/operate/kubernetes/7.4.6"
+#
+dir="$1"
+pages="$(find $dir -name "*.md")"
+
+# inject url frontmatter property in versioned folder
+for page in $pages; do
+  if [[ "$page" =~ \/_index.md$ ]]; then
+    url=$(sed "s/_index.md$/'/; s/^content/'/"<<< $page)
+  else
+    url=$(sed "s/.md$/\/'/; s/^content/'/"<<< $page)
+  fi
+  # skip if url property is already present
+  if ! grep -q "$url" $page; then
+    awk -v url="$url" '$1 == "---" {delim++; if (delim==2){printf "%s\n", "url: "url}} {print}' $page > tmp.md
+    mv tmp.md $page
+  fi
+done
+
+latest_dir="${dir%/*}"
+pages="$(find "$latest_dir" -name "*.md" ! -path '*.*.*' ! -path '*release-notes*' | xargs -I {} grep -rl 'aliases:' {})"
+
+# remove aliases from latest version
+for page in $pages; do
+  awk '$1 == "---" {delim++} /aliases/{f=1} {if(f==1 && delim!=2){}else {print}}' $page > tmp.md
+  mv tmp.md $page
+done