From e52e5ea5494319f158e9d9c1425b16b9986e929a Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Fri, 6 Apr 2018 19:54:03 +0200
Subject: rss_staggered

---
 odin/strm.nix           |  8 +++++---
 odin/strm/rss_staggered | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 3 deletions(-)
 create mode 100755 odin/strm/rss_staggered

diff --git a/odin/strm.nix b/odin/strm.nix
index 8c88514e..71d93011 100644
--- a/odin/strm.nix
+++ b/odin/strm.nix
@@ -1,4 +1,4 @@
-{ stdenv, zsh, ffmpeg-full, youtube-dl, pv, notmuch }:
+{ stdenv, zsh, ffmpeg-full, youtube-dl, pv, notmuch, rss2email }:
 
 stdenv.mkDerivation {
   name = "strm";
@@ -6,7 +6,7 @@ stdenv.mkDerivation {
 
   phases = [ "unpackPhase" "buildPhase" "installPhase" ];
 
-  inherit zsh pv notmuch;
+  inherit zsh pv notmuch rss2email;
   ffmpeg = ffmpeg-full;
   youtubedl = youtube-dl;
 
@@ -16,6 +16,7 @@ stdenv.mkDerivation {
     substituteAllInPlace send_media
     substituteAllInPlace cache_media
     substituteAllInPlace send_kitty
+    substituteAllInPlace rss_staggered
   '';
 
   installPhase = ''
@@ -26,6 +27,7 @@ stdenv.mkDerivation {
       cleanup_youtube \
       send_media \
       cache_media \
-      send_kitty
+      send_kitty \
+      rss_staggered
   '';
 }
diff --git a/odin/strm/rss_staggered b/odin/strm/rss_staggered
new file mode 100755
index 00000000..54bbd1a3
--- /dev/null
+++ b/odin/strm/rss_staggered
@@ -0,0 +1,32 @@
+#!@zsh@/bin/zsh
+
+delta_t=20
+interval=3600
+
+staggerFile=~/.rss-stagger
+
+[[ "${FLOCKER}" != "$0" ]] && exec env FLOCKER="$0" flock -x "${staggerFile}" "$0" "$@" || :
+
+feeds=$(@rss2email@/bin/r2e list | awk -F ':' 'END { print $1; }')
+max=$(($feeds + 1))
+num=$(((max * delta_t) / interval))
+[[ $num -lt 1 ]] && num=1
+
+now=$(cat ${staggerFile} || echo 0)
+now=$((now % max))
+
+typeset -a run
+run=()
+typeset -a names
+names=()
+
+n=0
+
+for i in $(seq $((now + 1)) $((now + num + 1))); do
+    n=$((i % max))
+    run+=$n
+done
+
+echo $n >! ${staggerFile}
+
+exec @rss2email@/bin/r2e run $run
-- 
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