don't regenerate the feeds when non-note m4 files change

[~bandali/bndl.org] / meta_feed_rss.m4

include(meta_defs.m4)dnl
<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0"
     xmlns:atom="http://www.w3.org/2005/Atom"
     xmlns:content="http://purl.org/rss/1.0/modules/content/">
<channel>
<title>Amin Bandali's Personal Site</title>
<description>Notes and blog posts by Amin Bandali</description>
<link>__d`'__p/</link>
<lastBuildDate>syscmd(date -uR | tr -d \\n)</lastBuildDate>
<pubDate>syscmd(date -uR | tr -d \\n)</pubDate>
<ttl>1800</ttl>
<atom:link href="__d`'__p/notes.rss" rel="self" type="application/rss+xml" />
<atom:link href="__d`'__p/notes.atom" rel="alternate" type="application/atom+xml" />
<atom:link href="__d`'__p/" rel="alternate" type="text/html" />
define(__feed_rss)dnl
define(`fordown',`ifelse($#,0,``$0'',`ifelse(eval($2>=$3),1,
  `pushdef(`$1',$2)$4`'popdef(`$1')$0(`$1',decr($2),$3,`$4')')')')
fordown(`__i',__latest,eval(__latest-10),`
  syscmd(m4 -D__feed_rss -D__d=__d -D__p=__p _get(`notes', __i).m4)')
</channel>
</rss>