Email a file from anywhere

gmutt.sh

#!/bin/bash

# gmutt.sh by Mike Whiting - mikejw3@gmai.com
#
# With one line send file attachments securely
# using mutt from gmail account and then remove generated
# config.
#
# You will need to set up 2-factor authentication with gmail
# and add an app password here:
# https://myaccount.google.com/apppasswords
#
# WARNING: may destroy pre-existing mutt config
#
# Download with:
# curl -s --output gmutt.sh https://gist.githubusercontent.com/mikejw/0ef963c67dec4085d9f5ee1d54c4f241/raw
#
# Usage:
# ./gmutt.sh <gmail username> <filename> <recipient email>


MUTTRC=~/.muttrc
USERNAME=$1
FILE=$2
RECIPIENT=$3
ERROR=1

read -r -d '' CONF << 'EOF'
\nset imap_user = "[USERNAME]@gmail.com"
\nset imap_pass = "[PASSWORD]"
\nset smtp_url = "smtp://[USERNAME]@smtp.gmail.com:587/"
\nset smtp_pass = "[PASSWORD]"
\nset from = "[USERNAME]@gmail.com"
\nset realname = "Your Real Name"
\nset folder = "imaps://imap.gmail.com:993"
\nset spoolfile = "+INBOX"
\nset postponed="+[Gmail]/Drafts"
\nset header_cache=~/.mutt/cache/headers
\nset message_cachedir=~/.mutt/cache/bodies
\nset certificate_file=~/.mutt/certificates
\nset move = no
EOF

if [ -z $FILE ] || [ ! -f $FILE ]; then
    echo "Error: Woops, can't find target file"
elif [ -z "$RECIPIENT" ]; then
    echo "Error: No email address supplied"
elif [ -z "$USERNAME" ]; then
    echo "Error: No gmail username provided"
else
    echo "Sending ${FILE} to ${RECIPIENT}..."
    echo "Installing deps..."
    apt-key update -qq > /dev/null 2>&1
    apt-get update -y -qq > /dev/null 2>&1
    apt-get install -y -qq \
        openssl mutt \
        > /dev/null 2>&1

    read -s -p "Enter gmail password: " PASSWORD
    if [ -z "$PASSWORD" ]; then
        echo "Error: No password"
    else 
        touch ${MUTTRC}
        grep -Fq "gmail" ${MUTTRC}
        if [[ $? -eq 1 ]]; then
            echo ""
            echo "Configuring mutt..."
            CONF=$(echo $CONF | sed "s/\[USERNAME\]/${USERNAME}/g")
            CONF=$(echo $CONF | sed "s/\[PASSWORD\]/${PASSWORD}/g")
            echo -e $CONF > ${MUTTRC}
        fi        
        echo "Sending an attachment." | mutt -s "Attachment" ${RECIPIENT} -a ${FILE}
        echo "Clean up..."
        rm ${MUTTRC}
        echo "Done."
        ERROR=0
    fi
fi

if [ "$ERROR" -eq "1" ]; then
   echo "Usage: ./gmutt.sh <gmail username> <filename> <recipient email>"
fi