adds template and makefiles

modify-pdf.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# Check if pdftk and ghostscript are installed
+if ! command -v pdftk &>/dev/null || ! command -v gs &>/dev/null; then
+    echo "Error: pdftk and ghostscript are required but not installed."
+    exit 1
+fi
+
+# Check for input arguments
+if [ "$#" -ne 3 ]; then
+    echo "Replaces the last page of a pdf file (input) with another (insert) and saves the file (output)."
+    echo "Usage: $0 input.pdf insert.pdf output.pdf"
+    exit 1
+fi
+
+input_pdf="$1"
+insert_pdf="$2"
+output_pdf="$3"
+
+# Get the number of pages in the input PDF
+num_pages=$(pdftk "$input_pdf" dump_data | grep NumberOfPages | awk '{print $2}')
+
+if [ -z "$num_pages" ]; then
+    echo "Error: Unable to determine the number of pages in the input PDF."
+    exit 1
+fi
+
+# Extract all pages except the last one
+pdftk "$input_pdf" cat 1-$(($num_pages - 1)) output temp_removed_last.pdf
+
+# Merge the modified PDF with the insert PDF
+pdftk temp_removed_last.pdf "$insert_pdf" cat output "$output_pdf"
+
+# Clean up temporary files
+rm -f temp_removed_last.pdf
+
+echo "Successfully created $output_pdf by replacing the last page with $insert_pdf."