From 778e5af12fc9e3b58ed2ec051261395fca034f09 Mon Sep 17 00:00:00 2001
From: gregor herrmann <gregor@toastfreeware.priv.at>
Date: Fri, 10 Mar 2023 00:54:11 +0100
Subject: [PATCH] Makefile: add 'plot' target, passing startdate from last
 rotated log to plot_mhz19.py

---
 Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index a7a2877..a067d2b 100644
--- a/Makefile
+++ b/Makefile
@@ -21,4 +21,8 @@ log.csv: log
 	sed -i -e '/Started/ d' -e '/Finished/ d ' -e 's/ O: /,/g' $@
 	perl -ni -e 'BEGIN{$$i=0}; print if ($$_ !~ /CO2/ || $$i == 0); $$i++;' $@
 
-.PHONY: log.csv
+STARTDATE=$(shell date "+%F" --date @$$(stat --format "%Y" $$(find -name "log-*.gz" | sort | tail -n 1)))
+plot: log.csv
+	./plot_mhz19.py --startdate $(STARTDATE) $<
+
+.PHONY: log.csv plot
-- 
2.39.5