From ae6b4995c9f88f59611e6e17946f65e4637e89f1 Mon Sep 17 00:00:00 2001
From: Ian Gulliver <ian@flamingcow.tv>
Date: Sun, 21 Apr 2019 18:06:52 +0000
Subject: [PATCH] Conserve work using mtime

---
 markdown/build-html.sh | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/markdown/build-html.sh b/markdown/build-html.sh
index b2d9628..182509d 100755
--- a/markdown/build-html.sh
+++ b/markdown/build-html.sh
@@ -8,11 +8,15 @@ for FILE in $BASEDIR/*.md; do
 		continue
 	fi
 	OUTNAME=${BASENAME%.md}.html
+	OUTPATH=$BASEDIR/../$OUTNAME
+	if [[ -e $OUTPATH && $OUTPATH -nt $FILE ]]; then
+		continue
+	fi
 	echo "$BASENAME -> $OUTNAME"
 	TEMP=$(tempfile --dir=$BASEDIR --mode=0644 --suffix=.tmp)
 	markdown $FILE > $TEMP
-	diff -ud --color=always $BASEDIR/../$OUTNAME $TEMP || true
-	mv $TEMP $BASEDIR/../$OUTNAME
+	diff -ud --color=always $OUTPATH $TEMP || true
+	mv $TEMP $OUTPATH
 done
 
 printf "\033[0;32mDONE\033[0m\n"