refactor(web/blog): Use timestamps for dates instead of strings

This lets me easily create an ordered list of entries if the homepage
is designed to list both blog posts and other content.

web/blog/default.nix

@@ -11,7 +11,7 @@ let
   post = struct "blog-post" {
     key = string; #
     title = string;
-    date = string; # *sigh*
+    date = int;
 
     # Path to the Markdown file containing the post content.
     content = path;
@@ -39,8 +39,7 @@ let
     ${lib.concatStringsSep "\n" (map (post:
       "cp ${fragments.renderPost post} $out/${post.key}.html"
     ) posts)}
-  ''; # '' (this line makes nix-mode happy :/)
-
+  '';
 in import ./nginx.nix (args // {
   inherit posts renderedBlog;
 })

web/blog/fragments.nix

@@ -51,9 +51,13 @@ let
   renderPost = post: runCommandNoCC "${post.key}.html" {} ''
     cat ${toFile "header.html" (header post.title)} > $out
 
-    # Write the actual post
+    # Write the post title & date
     echo '<article><h2 class="inline">${escape post.title}</h2>' >> $out
-    echo '<aside class="date">${post.date}</aside>' >> $out
+    echo '<aside class="date">' >> $out
+    date --date="@${toString post.date}" '+%Y-%m-%d' >> $out
+    echo '</aside>' >> $out
+
+    # Write the actual post through cheddar's about-filter mechanism
     cat ${post.content} | ${pkgs.tools.cheddar}/bin/cheddar --about-filter ${post.content} >> $out
     echo '</article>' >> $out
 

web/blog/posts.nix

@@ -3,35 +3,35 @@
   {
     key = "reversing-watchguard-vpn";
     title = "Reverse-engineering WatchGuard Mobile VPN";
-    date = "2017-02-11";
+    date = 1486830338;
     content = ./posts/reversing-watchguard-vpn.md;
     oldKey = "1486830338";
   }
   {
     key = "make-object-t-again";
     title = "Make Object <T> Again!";
-    date = "2016-10-18";
+    date = 1476807384;
     content = ./posts/make-object-t-again.md;
     oldKey = "1476807384";
   }
   {
     key = "the-smu-problem";
     title = "The SMU-problem of messaging apps";
-    date = "2015-12-17";
+    date = 1450354078;
     content =./posts/the-smu-problem.md;
     oldKey = "1450354078";
   }
   {
     key = "sick-in-sweden";
     title = "Being sick in Sweden";
-    date = "2015-02-15";
+    date = 1423995834;
     content = ./posts/sick-in-sweden.md;
     oldKey = "1423995834";
   }
   {
     key = "nsa-zettabytes";
     title = "The NSA's 5 zettabytes of data";
-    date = "2013-07-31";
+    date = 1375310627;
     content = ./posts/nsa-zettabytes.md;
     oldKey = "1375310627";
   }