Convert and concatenate all arguments into a single PDF (Mac only for the moment)

pdfify

#!/bin/bash

set -e

function usage() {
    echo "Usage: $(basename $0) FILE [FILE [FILE ...]]" >&2
}

# Validate args

if [[ -z "$@" ]]; then
    echo 'Please provide files to convert and join into a PDF' >&2
    usage
    exit 2
fi
FILES=( "$@" )
for file in "${FILES[@]}"; do
    if [[ ! -f "$file" ]]; then
        echo "Could not find file named: $file" >&2
        err=1
    fi
done
if [[ $err == 1 ]]; then
    exit 2
fi

# Set up environment

WORKING_DIR=$(mktemp -d)
if [[ -z "$WORKING_DIR" || ! -d "$WORKING_DIR" ]]; then
    echo 'Error creating temporary working directory.' >&2
    exit 1
fi

SOFFICE_PATH=/Applications/LibreOffice.app/Contents/MacOS/soffice
PDF_COMBINER_PATH=/System/Library/Automator/Combine\ PDF\ Pages.action/Contents/Resources/join.py

FILES_TO_CONVERT=()
PDF_FILES=()

for file in "${FILES[@]}"; do
    if [[ "$file" =~ \.pdf$ ]]; then
        PDF_FILES+=("$file")
    else
        PDF_FILES+=("$(echo "$file" | sed -e 's@\.[^\.]*$@.pdf@' -e "s@^@$WORKING_DIR/@")")
        FILES_TO_CONVERT+=("$(basename "$file")")
    fi
done

# Convert non-PDF files

if [[ ! -z "${FILES_TO_CONVERT[@]}" ]] && which "$SOFFICE_PATH" > /dev/null; then
    "$SOFFICE_PATH" \
        --convert-to pdf \
        -env:UserInstallation="file://$WORKING_DIR" \
        --outdir "$WORKING_DIR" \
        "${FILES_TO_CONVERT[@]}"
else
    echo 'ERROR: Could not convert input files. Is LibreOffice installed in /Applications/?' >&2
    exit 1
fi

# Combine PDFs

if ! which "$PDF_COMBINER_PATH" > /dev/null; then
    echo "Could not join PDFs. You can find the (potentially converted) PDFs here: $WORKING_DIR" >&2
else
    "$PDF_COMBINER_PATH" \
        --output /tmp/output.pdf \
        "${PDF_FILES[@]}"
    rm -rf "$WORKING_DIR"
    open /tmp/output.pdf
fi