set-file-extension-handler

#!/bin/sh
set -e
set -u

fn_version() { (
    echo "set-file-extension-handler v1.0.1 (2024-08-31)"
); }

fn_help() { (
    echo ""
    echo "USAGE"
    echo "        set-file-extension-handler <app> <extensions>"
    echo ""
    echo "EXAMPLES"
    echo "        set-file-extension-handler 'Brave Browser' .html .htm .svg"
    echo "        set-file-extension-handler 'BBEdit' .css .go .js .json .rs .sh .ts .txt .zig"
    echo "        set-file-extension-handler 'Markdown Editor' .mkdn .md"
    echo ""
); }

fn_ensure_duti() { (
    if command -v duti > /dev/null; then
        return
    fi

    printf "\n"
    printf "MISSING 'duti'\n\n"
    printf "    'duti' is required to set file extension handlers\n"
    printf "    https://formulae.brew.sh/formula/duti \n"
    printf "\n"
    printf "Install 'duti' now? [Y/n] "
    read -r b_yes

    case "${b_yes:-}" in
        "NO" | "No" | "N" | "no" | "n")
            {
                echo "abort: install 'duti', then run again"
                echo "    brew install duti"
            } >&2
            exit 1
            ;;
        *) ;;
    esac

    if ! command -v brew > /dev/null; then
        printf "\n"
        printf "MISSING 'brew'\n\n"
        printf "    'brew' can install 'duti', which doesn't have its own releases\n"
        printf "    https://webinstall.dev/brew/ \n"
        printf "    https://docs.brew.sh/Installation#alternative-installs \n"
        printf "\n"
        printf "Install 'brew' now? [Y/n] "
        read -r b_yes

        case "${b_yes:-}" in
            "NO" | "No" | "N" | "no" | "n")
                {
                    echo "abort: install 'brew' and 'duti', then run again"
                    echo "    curl https://webi.sh/brew | sh"
                    echo "    source ~/.config/envman/PATH.env"
                    echo "    brew install duti"
                } >&2
                exit 1
                ;;
            *) ;;
        esac

        curl --fail-with-body -sS https://webi.sh/brew | sh
        # shellcheck disable=SC1090
        . ~/.config/envman/PATH.env
    fi

    {
        brew install duti
        echo ""
        if duti -h 2>&1 | grep -q 'duti -s'; then
            echo "'duti' installed successfully"
        else
            echo "warn: 'duti' not installed correctly, or help output has changed"
        fi
        echo ""
    } >&2
    sleep 0.3
); }

main() { (
    case "${1:-}" in
        "")
            fn_help >&2
            exit 1
            ;;
        "--help" | "help")
            fn_version
            fn_help
            exit 0
            ;;
        "-V" | "--version" | "version")
            fn_version
            exit 0
            ;;
    esac

    fn_ensure_duti

    b_app=${1}
    shift
    # Example:
    #   osascript -e 'id of app "Brave Browser Beta"'
    #   osascript -e 'id of app "CotEditor"'
    b_app_id="$(
        osascript -e "id of app \"${b_app}\""
    )"

    echo ""
    printf "set \033[32m%s\033[0m \033[2m(%s)\033[0m as default app for...\n" "${b_app}" "${b_app_id}"
    echo ""
    while test -n "${1:-}"; do
        b_extension="${1}"
        printf "    \033[33m%s\033[0m\n" "${b_extension}"
        duti -s "${b_app_id}" "${b_extension}" all
        shift
    done
    echo ""
    echo "done"
); }

main "${@:-}"