pdfpages

commit 0964738ea0eeb1744f4fb08febb08ac37e3b61bd
parent 4867cc4395b38053640de3795d39496b90aa273c
Author: Riaz <riaz@riazj.com>
Date:   Sat,  4 Oct 2025 14:12:41 -0700

Improve speed of script example

Diffstat:
M
README
 | 
26
+++++++++++---------------

1 file changed, 11 insertions(+), 15 deletions(-)
diff --git a/README b/README
@@ -5,24 +5,20 @@ I use to get a list of PDFs with their page count.
 
 	#!/bin/sh -e
 
+	list="page-count.txt"
 	cd "$HOME/data/books"
+
 	for f in *.pdf; do
-	  pdfpages "$f" >> page-count.txt.tmp
+	  if [ ! -s "$list" ] || ! grep "$f" "$list" >> "$list.tmp"; then
+	    pdfpages "$f" >> "$list.tmp"
+	  fi
 	done
 
-	sort -V page-count.txt.tmp > page-count.txt
-	rm page-count.txt.tmp
-
-The difference is only a few tenths of a second when using pdfinfo instead of this program.
-
-	#!/bin/sh -e
+	sort -V "$list.tmp" > "$list"
+	rm "$list.tmp"
 
-	cd "$HOME/data/books"
-	for f in *.pdf; do
-	  pages="$(pdfinfo "$f" | grep Pages)"
-	  pages="${pages##* }"
-	  echo "$pages: $f" >> page-count.txt.tmp
-	done
+To use pdfinfo instead, replace pdfpages with the following:
 
-	sort -V page-count.txt.tmp > page-count.txt
-	rm page-count.txt.tmp
+	pages="$(pdfinfo "$f" | grep Pages)"
+	pages="${pages##* }"
+	echo "$pages: $f" >> "$list.tmp"