tmuxspace

TMUXSPACE=tmuxspace
VERSION=0.0.1

if [ $# -ne 1 ]
then
  echo "$0: missing file operand"
  echo "Try '$0 --help' for more information."
  exit 1
fi

if [ "$1" = '-h' ] || [ "$1" = '--help' ]
then
  cat <<-USAGE
    Usage: $0 [FILE]

        Start a new tmux workspace (session). It uses tmux-up under
        the hood.

        The FILE argument is used to bootstrap the new tmux session
        if it doesn't already exist. It must end with .tmuxspace.

        It must contain lines in the following format:

        path(name)[setup]

        path: The path to the directory
        name: The name of the window
        setup: The way you want that window to be setup. It must be 3
        characters long.
            [   ]: One pane
            [ | ]: Two panes split vertically
            [---]: Two panes split horizontally
            [-| ]: Three panes - two on the left and one on the right
            [ |-]: Three panes - one on the left and two on the right
            [-'-]: Three panes - two on the top and one on the bottom
            [-,-]: Three panes - one on the top and two on the bottom
            [-|-]: Four tiled panes

        You can have mutiple windows by adding another line

            --help     display this help and exit
            --version  output version information and exit
	USAGE
  exit 0
fi

if [ "$1" = '-v' ] || [ "$1" = '--version' ]
then
  cat <<-EOF
		$TMUXSPACE $VERSION
		Copyright (C) 2020 Francesco Ferraioli
		License MIT: <http://opensource.org/licenses/MIT>.
		This is free software: you are free to change and redistribute it.
		There is NO WARRANTY, to the extent permitted by law.
	EOF
  exit 0
fi

INPUT_FILE=${1}

if [[ "$INPUT_FILE" != *.tmuxspace ]]
then
    echo "$0: ‘${INPUT_FILE}’: Needs to end with .tmuxspace"
    exit 1
fi

if [ ! -f "$INPUT_FILE" ]
then
    echo "$0: ‘${INPUT_FILE}’: No such file"
    exit 1
fi

OUTPUT_FILE="$(basename "$INPUT_FILE" .tmuxspace).conf"

tmuxspace_run() {
    if [ -f "$OUTPUT_FILE" ]
    then
        rm $OUTPUT_FILE
    fi

    touch $OUTPUT_FILE

    IFS=$'\n' read -d '' -r -a windows < $INPUT_FILE

    create_window "${windows[0]}"

    for window in "${windows[@]:1:(${#windows[@]}-1)}"; do
        if [[ "${window}" =~ ^execute:[0-3]:.* ]]; then
            execute_command "${window}"
        elif [[ "${window}" =~ ^write:[0-3]:.* ]]; then
            write_command "${window}"
        else
            new_window
            create_window "${window}"
        fi
    done

    tmux-up $OUTPUT_FILE

    rm $OUTPUT_FILE
}

create_window() {
    DIR=$(echo "${1}" | sed 's/\(.*\)(.*)\[.*\]/\1/')
    NAME=$(echo "${1}" | sed 's/.*(\(.*\))\[.*\]/\1/')
    SETUP=$(echo "${1}" | sed 's/.*(.*)\(\[.*\]\)/\1/')

    rename_window "${NAME}"

    case "${SETUP}" in

        "[ | ]")
            go_to_dir "${DIR}"
            split_vertically
            go_to_dir "${DIR}"
            select_pane "L"
            ;;

        "[---]")
            go_to_dir "${DIR}"
            split_horizonally
            go_to_dir "${DIR}"
            select_pane "U"
            ;;

        "[-| ]")
            go_to_dir "${DIR}"
            split_vertically
            go_to_dir "${DIR}"
            select_pane "L"
            split_horizonally
            go_to_dir "${DIR}"
            select_pane "U"
            ;;

        "[ |-]")
            go_to_dir "${DIR}"
            split_vertically
            go_to_dir "${DIR}"
            split_horizonally
            go_to_dir "${DIR}"
            select_pane "L"
            ;;

        "[-'-]")
            go_to_dir "${DIR}"
            split_horizonally
            go_to_dir "${DIR}"
            select_pane "U"
            split_vertically
            go_to_dir "${DIR}"
            select_pane "L"
            ;;

        "[-,-]")
            go_to_dir "${DIR}"
            split_horizonally
            go_to_dir "${DIR}"
            split_vertically
            go_to_dir "${DIR}"
            select_pane "U"
            ;;

        "[-|-]")
            go_to_dir "${DIR}"
            split_vertically
            go_to_dir "${DIR}"
            split_horizonally
            go_to_dir "${DIR}"
            select_pane "L"
            split_horizonally
            go_to_dir "${DIR}"
            select_pane "U"
            ;;

        *)
            go_to_dir "${DIR}"
            ;;
    esac
}

execute_command() {
    PANE=$(echo "${1}" | sed 's/execute:\([0-3]\):.*/\1/')
    COMMAND=$(echo "${1}" | sed 's/execute:[0-3]:\(.*\)/\1/')
    add_line_to_output_file "select-pane -t $PANE"
    add_line_to_output_file "send-keys '${COMMAND}' C-m"
}

write_command() {
    PANE=$(echo "${1}" | sed 's/write:\([0-3]\):.*/\1/')
    COMMAND=$(echo "${1}" | sed 's/write:[0-3]:\(.*\)/\1/')
    add_line_to_output_file "select-pane -t $PANE"
    add_line_to_output_file "send-keys '${COMMAND}'"
}

new_window() {
    add_line_to_output_file "new-window"
}

rename_window() {
    add_line_to_output_file "rename-window '$1'"
}

select_pane() {
    add_line_to_output_file "select-pane -$1"
}

go_to_dir() {
    add_line_to_output_file "send-keys 'cd $1' C-m"
    add_line_to_output_file "send-keys 'clear' C-m"
}

split_vertically() {
    add_line_to_output_file "split-window -h"
}

split_horizonally() {
    add_line_to_output_file "split-window -v"
}

add_line_to_output_file() {
    echo "$1" >> $OUTPUT_FILE
}

tmuxspace_run