From 70ef6b9e978aa58170e80bbb7121f3a6089f8ac3 Mon Sep 17 00:00:00 2001
From: Lucidiot <lucidiot@protonmail.com>
Date: Sun, 21 Mar 2021 15:48:57 +0100
Subject: [PATCH] Add CDF meta-feed

---
 .gitignore   |  1 +
 bin/cdfmerge | 17 +++++++++++++++++
 feedgen.sh   | 17 +++++++++++------
 itsb.xml     |  5 +++--
 4 files changed, 32 insertions(+), 8 deletions(-)
 create mode 100755 bin/cdfmerge

diff --git a/.gitignore b/.gitignore
index b3e5639..1540b2e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 feeds
 feeds.opml
+feeds.cdf
 index.html
 *~
 *.sw[a-z]
diff --git a/bin/cdfmerge b/bin/cdfmerge
new file mode 100755
index 0000000..fb6ceac
--- /dev/null
+++ b/bin/cdfmerge
@@ -0,0 +1,17 @@
+#!/bin/bash
+[ -z "$DIR" ] && DIR="$( cd "$(dirname "${BASH_SOURCE[0]}")/.." >/dev/null 2>&1 && pwd )"
+
+echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>
+<CHANNEL LASTMOD=\"$(date --utc '+%Y-%m-%dT%H:%M')\">
+  <A HREF=\"http://tilde.town/~lucidiot/itsb/\"/>
+  <ABSTRACT>A project to make transport accident investigation reports easier to access.</ABSTRACT>
+  <TITLE>International Transport Safety Bureau</TITLE>
+  <LOGO HREF=\"http://tilde.town/~lucidiot/itsb/img/itsb.gif\" STYLE=\"ICON\"/>
+  <LOGO HREF=\"http://tilde.town/~lucidiot/itsb/img/itsb.gif\" STYLE=\"IMAGE\"/>" > "$DIR/feeds.cdf.new"
+
+# Grab the paths to all generated CDF feeds from the XML in stdin
+bin/xml2json | jq --raw-output --arg DIR "$DIR" '.. | objects | select(.["@format"] == "cdf") | "\($DIR)/feeds/\(.output // .link)"' | xargs tail -q -n+2 > "$DIR/feeds.cdf.new"
+
+echo '</CHANNEL>' >> "$DIR/feeds.cdf.new"
+
+mv "$DIR/feeds.cdf.new" "$DIR/feeds.cdf"
diff --git a/feedgen.sh b/feedgen.sh
index 6af2b9e..efa5c3a 100755
--- a/feedgen.sh
+++ b/feedgen.sh
@@ -1,8 +1,13 @@
 #!/bin/bash
 [ -z "$DIR" ] && DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-xsltproc "$DIR/xslt/itsb.xsl" "$DIR/itsb.xml" \
-	| tee \
-		>(xsltproc "$DIR/xslt/opml.xsl" - > "$DIR/feeds.opml") \
-		>(xsltproc "$DIR/xslt/html.xsl" - > "$DIR/index.html") \
-	| xsltproc "$DIR/xslt/feedgen.xsl" - \
-	| DIR="$DIR" bash -s -- "$@"
+
+tmpfile=$(mktemp /tmp/itsb.XXXXXXXXXX)
+trap "rm \"$tmpfile\"" EXIT
+
+xsltproc "$DIR/xslt/itsb.xsl" "$DIR/itsb.xml" > "$tmpfile"
+
+xsltproc "$DIR/xslt/feedgen.xsl" "$tmpfile" | DIR="$DIR" bash -s -- "$@"
+xsltproc "$DIR/xslt/opml.xsl" "$tmpfile" > "$DIR/feeds.opml"
+xsltproc "$DIR/xslt/html.xsl" "$tmpfile" > "$DIR/index.html"
+
+bin/cdfmerge < "$tmpfile"
diff --git a/itsb.xml b/itsb.xml
index 5dfa8dd..fa30e2d 100644
--- a/itsb.xml
+++ b/itsb.xml
@@ -14,8 +14,9 @@
       <p>but hey, i can still browse webpages to find the reports&mdash;what if i parsed those pages?</p>
       <p>this is the whole goal of this project; to centralize accident reports into manageable RSS feeds and maybe more formats later on.</p>
       <p>
-        you can get all the feeds at once in one OPML file:
-        <a href="./feeds.opml" target="_blank"><img src="img/opml.gif" alt="OPML Feeds" /></a>
+        you can get all the feeds at once:
+        <a href="./feeds.opml" target="_blank"><img src="img/opml.gif" alt="OPML" /></a>
+        <a href="./feeds.cdf" target="_blank"><img src="img/cdf.gif" alt="CDF" /></a>
       </p>
       ]]>
     </content>