add template for github edit in footer

Author: njtierney

config.toml

@@ -38,4 +38,5 @@ footnotereturnlinkcontents = "↩"
 
 [params]
     description = "Credibly Curious"
+    GithubEdit = "https://github.com/rbind/njtierney.com/edit/feature/github-edit/exampleSite/content/"
     footer = "© [Nicholas Tierney](https://njtierney.com) 2017 | [Github](https://github.com/njtierney) | [Twitter](https://twitter.com/nj_tierney)"

themes/hugo-xmin/layouts/partials/footer.html

@@ -4,6 +4,17 @@
   <hr/>
   {{ . | markdownify }}
   {{ end }}
+  {{ if .File.Path }}
+   {{ $RmdFile := (print .File.BaseFileName ".Rmd") }}
+   {{ if (where (readDir (print "content/" .File.Dir)) "Name" $RmdFile) }}
+     {{ $.Scratch.Set "FilePath" (print .File.Dir $RmdFile) }}
+   {{ else }}
+     {{ $.Scratch.Set "FilePath" .File.Path }}
+   {{ end }}
+   {{ with .Site.Params.GithubEdit}}
+   | <a href="{{ . }}{{ $.Scratch.Get "FilePath" }}">Edit this page</a>
+   {{ end }}
+  {{ end }}
   </footer>
   </body>
 </html>