ThesisProposal/modify-pdf.sh
2024-12-04 17:21:40 +01:00

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#!/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."