154 lines
4 KiB
Bash
Executable file
154 lines
4 KiB
Bash
Executable file
#!/bin/sh
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#
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# Attach to a tmux session, or create it if it doesnt exist
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if [ "$1" = '-h' ] || [ "$1" = '--help' ]; then
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cat <<-EOF
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Usage: $0 [FILE] [NAME]
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Attach to an existing tmux session, or bootstrap a new session.
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If no session exists which fits the criteria, this will create a new one and
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load it up obeying the commands contained in the FILE argument passed in. It
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must contain commands which are tmux-command compatible since they will be
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passed to tmux unmodified. If a session exists and a valid configuration FILE is
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passed, it will attach itself to the session and execute the session setup inside.
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It will load the default tmux.conf in the following order:
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- XDG_CONFIG_HOME/tmux/tmux.conf (usually ~/.config/tmux/tmux.conf)
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- ~/.tmux.conf
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- /etc/tmux.conf
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Afterwards, it will apply the contents of the FILE argument passed into the command.
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If no FILE argument is passed it will create an empty session, or attach itself to
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the session specified.
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If no NAME argument is passed it will automatically create a session name from the
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FILE argument passed.
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If creating a new session without passing in a FILE argument, and the current directory
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contains a .tmux.session file, it will automatically use that to set up the session.
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By default, it also looks for valid session files in XDG_CONFIG_HOME/tmux/sessions/
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This path can be changed by setting the TM_SESSION_PATH environment variable.
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EOF
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exit 0
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fi
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# Make tmux obey the XDG specification on startup
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if [ -e "$XDG_CONFIG_HOME/tmux/tmux.conf" ]; then
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start="tmux -f $XDG_CONFIG_HOME/tmux/tmux.conf"
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else
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start=tmux
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fi
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_file_exists() {
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if [ -f "$1" ]; then
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true
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else
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false
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fi
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}
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_not_in_tmux() {
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[ -z "$TMUX" ]
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}
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_session_exists() {
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if tmux has-session -t "$session_name" >/dev/null 2>&1; then
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true
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else
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false
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fi
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}
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_create_detached_session() {
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($start new-session -d -s "$session_name")
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}
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_load_env_session_file() {
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if [ -f ./.tmux.session ]; then
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xargs -L1 tmux <./.tmux.session
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fi
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}
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_load_session_file() {
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if [ -f "$session_file" ]; then
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xargs -L1 tmux <"$session_file"
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fi
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}
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_set_session_file_path() {
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# Prefer local dir if file exists there, fall back to root dir
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if _file_exists "${1}"; then
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session_file="${1}"
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elif _file_exists "${session_dir}${1}"; then
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session_file="${session_dir}${1}"
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fi
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}
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_set_session_vars() {
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session_dir=${TM_SESSION_DIR:-"$XDG_CONFIG_HOME/tmux/sessions/"}
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# set up session name and config file - if passed in as arguments
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if [ "$#" -eq 2 ]; then
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if ! _file_exists "$1" && ! _file_exists "${session_dir}${1}"; then
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echo >&2 "can not source session file: '${1}' does not exist."
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exit 1
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fi
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_set_session_file_path "$1"
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session_name=${2}
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elif [ "$#" -eq 1 ]; then
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_set_session_file_path "$1"
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if ! _file_exists "$session_file"; then
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session_name=${1}
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fi
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fi
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# set default session name if none was passed
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if [ -z "$session_name" ]; then
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# only if we have a filename should we append it to the session name
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if [ -n "$session_file" ]; then
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fname=/$(basename "$session_file" .session)
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fi
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# default to parent directory name / config file name for the session
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session_name=$(basename "$PWD" | sed 's/[^a-zA-Z0-9\-]//g' | tr . -)"$fname"
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fi
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}
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_attach_or_create() {
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# first create a new session if one doesn't exist
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if ! _session_exists; then
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_create_detached_session
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# look for .tmux.session file if no file has been explicitly passed in
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if ! _file_exists "$session_file"; then
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_load_env_session_file
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fi
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fi
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_load_session_file
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# then attach or switch to the session
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if _not_in_tmux; then
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$start attach -t "$session_name"
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else
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$start switch-client -t "$session_name"
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fi
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_unset_functions
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}
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_unset_functions() {
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unset _set_session_vars
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unset _set_session_file_path
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unset _attach_or_create
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unset _load_session_file
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unset _create_detached_session
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unset _session_exists
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unset _not_in_tmux
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unset _file_exists
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}
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_set_session_vars "$@"
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_attach_or_create
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exit 0
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