basic structure; zsh default; no desktop assumed

_custom/.local/bin/pdfsplit

@@ -0,0 +1,19 @@
+#!/bin/zsh
+# Split a PDF file in two at a specified page
+# 1 original PDF file path
+# 2 last page of first section (second section will start with the one after that)
+source ~/.local/lib/pdf_tools.sh
+
+typeset -r             numpages=$(pdf_num_pages $1)
+typeset -r             digits=$#numpages
+typeset -r -Z${digits} m=$2
+
+(( $2 > ${numpages} )) && echo "The document is only ${numpages} pages long, which is less than $2!" && exit 1
+(( $2 == ${numpages} )) && echo "The document is exactly ${numpages} pages long!\nNo action taken." && exit
+
+typeset -r             stem=${1%.pdf}
+typeset -r -Z${digits} one=1
+typeset -r -Z${digits} n=$(( m + 1 ))
+
+pdf_extract_range "$1" 1 ${m} "${stem}_${one}-${m}.pdf" > /dev/null
+pdf_extract_range "$1" ${n} ${numpages} "${stem}_${n}-${numpages}.pdf" > /dev/null