Bash function to add a repo with new "signed-by" line in apt sources

add-repo.sh

add-repo() {
  add-repo_usage() {
    # Help Blue, Help Blue Bold, Help Blue Italic, Italic Text and Reset Text
    local HB='\e[38;2;72;226;225m' HBB='\e[1;38;2;72;226;225m' HBI='\e[3;38;2;72;226;225m' IT='\e[3m' RT='\e[0m'
    printf "\n\e[2G${HBB}${FUNCNAME%_*}${RT}: ${IT}Add a repo using the new \x22signed-by\x22 feature${RT}\n\n"
    printf "\e[2G${HBB}Usage${RT}:\n\n"
    printf "\e[5G${FUNCNAME%_*} [ options ]\n\n"
    printf "\e[2G${HBB}Options${RT}:\n\n"
    printf "\e[5G-n,--repo-name\e[22GRepo Name\n\n"
    printf "\e[5G-u,--repo-url\e[22GRepo URL (in sources.list format)\n\n"
    printf "\e[5G-k,--repo-key\e[22GID (fingerprint, long, short) or URL of GPG Key\n\n"
    printf "\e[2G${HBB}Examples${RT}:\n\n"
    printf "\e[2G${HBB}${FUNCNAME%_*}${RT} \x5C\n\e[3G-n mongdb-6 \x5C\n\e[3G-u 'https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/6.0 multiverse' \x5C\n\e[3G-k https://www.mongodb.org/static/pgp/server-6.0.asc\n\n"
    printf "\e[2G${HBB}${FUNCNAME%_*}${RT} \x5C\n\e[3G-n maas-3.2 \x5C\n\e[3G-u 'https://ppa.launchpadcontent.net/maas/3.2/ubuntu focal main' \x5C\n\e[3G-k 4e7fdc5684d4a1c\n\n"
    printf "\e[2G${HBB}${FUNCNAME%_*}${RT} \x5C\n\e[3G-n maas-3.2 \x5C\n\e[3G-u 'https://ppa.launchpadcontent.net/maas/3.2/ubuntu focal main' \x5C\n\e[3G-k 3ab6dcf1f234e78daa9c104204e7fdc5684d4a1c\n\n"
  };export -f add-repo_usage
  [[ ${@} = -h ]] && { ${FUNCNAME}_usage;return 2; }
  local REPO_NAME REPO_URL REPO_KEY
  ARGS=$(getopt -o n:u:k:h --long repo-name:,repo-url:,repo-key:,help -n ${FUNCNAME} -- "$@")
  eval set -- "$ARGS"
  while true ; do
    case "$1" in
      -n|--repo-name) local REPO_NAME="${2}";shift 2;;
      -u|--repo-url) local REPO_URL="${2}";shift 2;;
      -k|--repo-key) local REPO_KEY="${2}";shift 2;;
      -h|--help) ${FUNCNAME}_usage;return 2;;
      --) shift;break;;
      *) printf "\n\e[0;38;2;255;0;0mError\x21\e[0m\e[1m Unknown Option \x22${1}\x22\e[0m\n\n";return 1;;
    esac
  done
  [[ -n ${REPO_NAME} ]] && { true; } || { printf "\n\e[2G\e[0;38;2;255;0;0mERROR:\e[0m Missing Name for Repo\n\n";add-repo_usage;return 1; }
  [[ -n ${REPO_URL} ]] && { true; } || { printf "\n\e[2G\e[0;38;2;255;0;0mERROR:\e[0m Missing Repo URL\n\n";add-repo_usage;return 1; }
 	[[ -n ${REPO_KEY} ]] && { true; } || { printf "\n\e[2G\e[0;38;2;255;0;0mERROR:\e[0m Missing GPG Key ID/URL\n\n";add-repo_usage;return 1; }

  [[ $(grep -qiE 'https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)' <<< "${REPO_KEY}";echo $?) -eq 0 ]] && { local KEYTYPE=URL; }
  [[ ${#REPO_KEY} =~ (40|16|8) ]] && { local KEYTYPE=ID; }

	[[ ${KEYTYPE} = ID ]] && { (curl -fsSL 'https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x'${REPO_KEY}''|gpg --dearmor|sudo tee 1>/dev/null /usr/share/keyrings/${REPO_NAME}-keyring.gpg);local KRR=$?; }
	[[ ${KEYTYPE} = URL ]] && { (curl -fsSL ${REPO_KEY}|gpg --dearmor|sudo tee 1>/dev/null /usr/share/keyrings/${REPO_NAME}-keyring.gpg);local KRR=$?; }

  [[ ${KRR} -eq 0 ]] || { printf "\n\e[2G\e[0;38;2;255;0;0mERROR:\e[0m Could not create /usr/share/keyrings/${REPO_NAME}-keyring.gpg\n\n";return 1; }
  [[ ${KRR} -eq 0 ]] && { echo "deb [arch=$(printf '%s\n' --print-architecture --print-foreign-architectures|xargs -n1 dpkg|paste -sd,) signed-by=/usr/share/keyrings/${REPO_NAME}-keyring.gpg] ${REPO_URL}" |sudo tee /etc/apt/sources.list.d/${REPO_NAME}.list > /dev/null; }
	sudo apt update
};export -f add-repo

$ add-repo -h

 add-repo: Add a repo using the new "signed-by" feature

 Usage:

    add-repo [ options ]

 Options:

    -n,--repo-name   Repo Name

    -u,--repo-url    Repo URL (in sources.list format)

    -k,--repo-key    ID (fingerprint, long, short) or URL of GPG Key

 Examples:

 add-repo \
  -n mongdb-6 \
  -u 'https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/6.0 multiverse' \
  -k https://www.mongodb.org/static/pgp/server-6.0.asc

 add-repo \
  -n maas-3.2 \
  -u 'https://ppa.launchpadcontent.net/maas/3.2/ubuntu focal main' \
  -k 4e7fdc5684d4a1c

 add-repo \
  -n maas-3.2 \
  -u 'https://ppa.launchpadcontent.net/maas/3.2/ubuntu focal main' \
  -k 3ab6dcf1f234e78daa9c104204e7fdc5684d4a1c

$ add-repo -n mongodb_6 -u 'https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/6.0 multiverse' -k 'https://www.mongodb.org/static/pgp/server-6.0.asc'
Hit:1 http://us.archive.ubuntu.com/ubuntu jammy InRelease
Hit:2 https://apt.releases.hashicorp.com jammy InRelease
Get:3 http://us.archive.ubuntu.com/ubuntu jammy-updates InRelease [114 kB]
Ign:4 https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/6.0 InRelease
Hit:5 https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/6.0 Release
Get:6 https://esm.ubuntu.com/apps/ubuntu jammy-apps-security InRelease [7,520 B]
Get:8 https://esm.ubuntu.com/apps/ubuntu jammy-apps-updates InRelease [7,459 B]
Get:9 http://us.archive.ubuntu.com/ubuntu jammy-backports InRelease [99.8 kB]
Hit:10 https://esm.ubuntu.com/infra/ubuntu jammy-infra-security InRelease
Get:11 http://us.archive.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Hit:12 https://esm.ubuntu.com/infra/ubuntu jammy-infra-updates InRelease
Hit:13 https://ppa.launchpadcontent.net/maas/3.2/ubuntu focal InRelease
Hit:14 http://us.archive.ubuntu.com/ubuntu jammy-proposed InRelease
Fetched 339 kB in 1s (261 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.