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content/blog/convert-djvu-to-pdf.md

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+---
+title: "Convert DJVU to PDF"
+date: 2021-08-27T22:00:00-04:00
+draft: false
+tags: []
+math: false
+---
+
+I've recently come across the DJVU file format before and needed to convert it to a PDF. The most reliable way I've found to do it is via the following command.
+
+```bash
+djvups FILENAME | ps2pdf - OUTPUT_FILE
+```
+
+Where FILENAME first gets converted to the PS file format which then gets converted to a PDF with the name OUTPUT_FILE. To make things easier, I wrote a little script that does this process automatically while preserving the filename.
+
+```bash
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+show_usage() {
+    echo "Usage: djvu2pdf [FILENAME]"
+    exit 1
+}
+
+if [ "$#" -ne 1 ]; then
+    show_usage
+fi
+
+if ! command -v djvups > /dev/null ; then
+    echo "djvups not found. Exiting..."
+    exit 1
+fi
+
+if ! command -v ps2pdf > /dev/null ; then
+    echo "ps2pdf not found. Exiting..."
+    exit 1
+fi
+
+djvups "$1" | ps2pdf - "${1%.*}.pdf"
+```
+