How to Automatically Rename the First File when Merging Two PDFs on macOS

Introduction

In this article, we will explore how to automatically rename the first file when merging two PDFs on macOS. This is a common use case when combining multiple PDF files, where you might want to keep the name of the second file and rename the first file to avoid overwriting it. We will go through the process step by step, with detailed explanations and code blocks as needed.

Merging PDFs on macOS

Merging two or more PDF files on macOS can be done using various tools, but one of the most powerful and flexible ways is to use the command-line tool called pdftoolkit (also known as pdftk). This tool allows you to merge, split, and manipulate PDF files in various ways.

Installing pdftoolkit on macOS

To install pdftoolkit on macOS, you can use Homebrew, a popular package manager. If you don't have Homebrew installed, you can install it by following the instructions on their website: https://brew.sh/

To install pdftoolkit, open a terminal window and enter the following command:

brew install pdftoolkit

Merging PDF Files with pdftoolkit

To merge two PDF files using pdftoolkit, you can use the following command:

pdftk first.pdf second.pdf output merged.pdf

This command merges the contents of first.pdf and second.pdf into a new file called merged.pdf.

Automatically Renaming the First File

In order to automatically rename the first file when merging two PDFs, we can write a script that gets the name of the second file, creates a new file with that name, and then merges the first file into it. Here's how you can do it:

Creating a Script

Create a new file called merge-pdfs.sh and paste the following script into it:

#!/bin/bash

# Check that two files were provided
if [ "$#" -ne 2 ]; then
  echo "Usage: $0 first.pdf second.pdf"
  exit 1
fi

# Get the name of the second file
SECOND_FILE="$2"

# Extract the base name of the second file (without the extension)
BASE_NAME=$(basename -- "$SECOND_FILE")
EXTENSION="${BASE_NAME##*.}"
BASE_NAME="${BASE_NAME%.*}"

# Create a new file with the name of the second file
touch "${BASE_NAME}.pdf"

# Merge the first file into the new file
pdftk "$1" output "${BASE_NAME}.pdf"

Making the Script Executable

To make the script executable, run the following command:

chmod +x merge-pdfs.sh

Usage Example

To use the script, simply provide the names of the two PDF files as arguments:

./merge-pdfs.sh first.pdf second.pdf

This will create a new file called second.pdf with the merged contents of first.pdf and second.pdf.

• To merge two PDF files on macOS, you can use the command-line tool pdftoolkit.
• To automatically rename the first file when merging two PDFs, you can use a script that creates a new file with the name of the second file and then merges the first file into it.

References

• pdftoolkit: https://www.pdflabs.com/tools/pdftk-server/
• Homebrew: https://brew.sh/