From ccd7a4805a0486cb1bf38706c2872be36fb0fc8c Mon Sep 17 00:00:00 2001
From: Amin Bandali <bandali@gnu.org>
Date: Sun, 16 May 2021 16:23:53 -0400
Subject: [PATCH] don't regenerate the feeds when non-note m4 files change

---
 GNUmakefile  | 3 ++-
 get-notes.sh | 9 +++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100755 get-notes.sh

diff --git a/GNUmakefile b/GNUmakefile
index 36c83f8..321b19d 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -24,13 +24,14 @@ SITE_URL := '$(SITE_DOMAIN)$(SITE_PREFIX)'
 SRC := $(filter-out $(wildcard meta_*), $(wildcard *.m4))
 OUTPUTS := $(patsubst %.m4,out/%.html, $(SRC))
 STATIC := $(patsubst static/%,out/%, $(filter-out static/GNUmakefile, $(wildcard static/* static/.*)))
+NOTES := $(shell ./get-notes.sh)
 
 all: $(OUTPUTS) out/notes.atom out/notes.rss out/style.css out/GNUmakefile $(STATIC)
 
 out/%.html: %.m4 header.html footer.html
 	@mkdir -p $(@D)
 	m4 -D__d=$(SITE_DOMAIN) -D__p=$(SITE_PREFIX) $< > $@
-out/notes.%: meta_feed_%.m4 $(SRC) header.html footer.html
+out/notes.%: meta_feed_%.m4 $(NOTES) header.html footer.html
 	m4 -D__d=$(SITE_DOMAIN) -D__p=$(SITE_PREFIX) $< > $@
 	sed -i 's|href="/\([^/]\)|href="$(SITE_DOMAIN)/\1|' $@
 	sed -i 's|href="//|href="https://|' $@
diff --git a/get-notes.sh b/get-notes.sh
new file mode 100755
index 0000000..fa6483b
--- /dev/null
+++ b/get-notes.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+i=1
+n=$(echo '__latest' | m4 meta_defs.m4 -)
+
+while [ $i -le $n ]; do
+    echo "_get(\`notes', $i).m4" | m4 meta_defs.m4 -
+    i=$(($i+1))
+done
-- 
2.20.1