fix: add TMUX_CMD_PATH to handle the case of multiple tmux installation

bindings/update_plugins

@@ -11,6 +11,8 @@ CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 SCRIPTS_DIR="$CURRENT_DIR/../scripts"
 HELPERS_DIR="$SCRIPTS_DIR/helpers"
 
+source "$SCRIPTS_DIR/tmux_cmd_path.sh"
+
 source "$HELPERS_DIR/plugin_functions.sh"
 source "$HELPERS_DIR/tmux_echo_functions.sh"
 source "$HELPERS_DIR/tmux_utils.sh"
@@ -36,7 +38,7 @@ display_plugin_update_list() {
 }
 
 update_plugin_prompt() {
-	tmux command-prompt -p 'plugin update:' " \
+	$TMUX_CMD_PATH command-prompt -p 'plugin update:' " \
 		send-keys C-c; \
 		run-shell '$SCRIPTS_DIR/update_plugin_prompt_handler.sh %1'"
 }

scripts/check_tmux_version.sh

@@ -3,10 +3,17 @@
 VERSION="$1"
 UNSUPPORTED_MSG="$2"
 
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+SCRIPTS_DIR="$CURRENT_DIR/../scripts"
+HELPERS_DIR="$SCRIPTS_DIR/helpers"
+
+source "$SCRIPTS_DIR/tmux_cmd_path.sh"
+
+
 get_tmux_option() {
 	local option=$1
 	local default_value=$2
-	local option_value=$(tmux show-option -gqv "$option")
+	local option_value=$($TMUX_CMD_PATH show-option -gqv "$option")
 	if [ -z "$option_value" ]; then
 		echo "$default_value"
 	else
@@ -30,13 +37,13 @@ display_message() {
 	local saved_display_time=$(get_tmux_option "display-time" "750")
 
 	# sets message display time to 5 seconds
-	tmux set-option -gq display-time "$display_duration"
+	$TMUX_CMD_PATH set-option -gq display-time "$display_duration"
 
 	# displays message
-	tmux display-message "$message"
+	$TMUX_CMD_PATH display-message "$message"
 
 	# restores original 'display-time' value
-	tmux set-option -gq display-time "$saved_display_time"
+	$TMUX_CMD_PATH set-option -gq display-time "$saved_display_time"
 }
 
 # this is used to get "clean" integer version number. Examples:
@@ -49,7 +56,7 @@ get_digits_from_string() {
 }
 
 tmux_version_int() {
-	local tmux_version_string=$(tmux -V)
+	local tmux_version_string=$($TMUX_CMD_PATH -V)
 	echo "$(get_digits_from_string "$tmux_version_string")"
 }
 

scripts/helpers/plugin_functions.sh

@@ -1,6 +1,11 @@
 # using @tpm_plugins is now deprecated in favor of using @plugin syntax
 tpm_plugins_variable_name="@tpm_plugins"
 
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+SCRIPTS_DIR="$CURRENT_DIR/../../scripts"
+HELPERS_DIR="$SCRIPTS_DIR/helpers"
+source "$SCRIPTS_DIR/tmux_cmd_path.sh"
+
 # manually expanding tilde char or `$HOME` variable.
 _manual_expansion() {
 	local path="$1"
@@ -9,7 +14,7 @@ _manual_expansion() {
 }
 
 _tpm_path() {
-	local string_path="$(tmux start-server\; show-environment -g TMUX_PLUGIN_MANAGER_PATH | cut -f2 -d=)/"
+	local string_path="$($TMUX_CMD_PATH start-server\; show-environment -g TMUX_PLUGIN_MANAGER_PATH | cut -f2 -d=)/"
 	_manual_expansion "$string_path"
 }
 

scripts/helpers/tmux_echo_functions.sh

@@ -1,10 +1,15 @@
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+SCRIPTS_DIR="$CURRENT_DIR/../../scripts"
+HELPERS_DIR="$SCRIPTS_DIR/helpers"
+source "$SCRIPTS_DIR/tmux_cmd_path.sh"
+
 _has_emacs_mode_keys() {
-	$(tmux show -gw mode-keys | grep -q emacs)
+	$($TMUX_CMD_PATH show -gw mode-keys | grep -q emacs)
 }
 
 tmux_echo() {
 	local message="$1"
-	tmux run-shell "echo '$message'"
+	$TMUX_CMD_PATH run-shell "echo '$message'"
 }
 
 echo_ok() {

scripts/helpers/tmux_utils.sh

@@ -1,3 +1,9 @@
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+SCRIPTS_DIR="$CURRENT_DIR/../../scripts"
+HELPERS_DIR="$SCRIPTS_DIR/helpers"
+source "$SCRIPTS_DIR/tmux_cmd_path.sh"
+
 reload_tmux_environment() {
-	tmux source-file ~/.tmux.conf >/dev/null 2>&1
+	$TMUX_CMD_PATH source-file ~/.tmux.conf >/dev/null 2>&1
 }

scripts/tmux_cmd_path.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Written by michaellee8 <[email protected]> in Nov 2020 for 
+# https://github.com/tmux-plugins/tpm/issues/189 to prevent problems caused by 
+# tmux version mismatch between client and server. This script is 
+# licensed in public domain.
+
+# Try to get the process ID of the running tmux server, 
+# would be empty if not found
+TMUX_SERVER_PID=$(ps -eo pid=,comm= | grep 'tmux: server' | awk '{ print $1; }')
+
+if [[ -n "$TMUX_SERVER_PID" ]]; then
+    TMUX_CMD_PATH=$(realpath "/proc/$TMUX_SERVER_PID/exe" 2> /dev/null || echo "tmux" | sed -z '$ s/\n$//')
+else
+    TMUX_CMD_PATH='tmux'
+fi
+
+export TMUX_CMD_PATH

tpm

@@ -4,12 +4,14 @@ CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 BINDINGS_DIR="$CURRENT_DIR/bindings"
 SCRIPTS_DIR="$CURRENT_DIR/scripts"
 
+source "$SCRIPTS_DIR/tmux_cmd_path.sh"
+
 source "$SCRIPTS_DIR/variables.sh"
 
 get_tmux_option() {
 	local option="$1"
 	local default_value="$2"
-	local option_value="$(tmux show-option -gqv "$option")"
+	local option_value="$($TMUX_CMD_PATH show-option -gqv "$option")"
 	if [ -z "$option_value" ]; then
 		echo "$default_value"
 	else
@@ -18,7 +20,7 @@ get_tmux_option() {
 }
 
 tpm_path_set() {
-	tmux show-environment -g "$DEFAULT_TPM_ENV_VAR_NAME" >/dev/null 2>&1
+	$TMUX_CMD_PATH show-environment -g "$DEFAULT_TPM_ENV_VAR_NAME" >/dev/null 2>&1
 }
 
 # Check if configuration file exists at an XDG-compatible location, if so use
@@ -31,7 +33,7 @@ set_default_tpm_path() {
 		tpm_path="$xdg_tmux_path/plugins/"
 	fi
 
-	tmux set-environment -g "$DEFAULT_TPM_ENV_VAR_NAME" "$tpm_path"
+	$TMUX_CMD_PATH set-environment -g "$DEFAULT_TPM_ENV_VAR_NAME" "$tpm_path"
 }
 
 # Ensures TMUX_PLUGIN_MANAGER_PATH global env variable is set.
@@ -58,13 +60,13 @@ source_plugins() {
 # prefix + alt + u - remove unused TPM plugins and reloads TMUX environment
 set_tpm_key_bindings() {
 	local install_key="$(get_tmux_option "$install_key_option" "$default_install_key")"
-	tmux bind-key "$install_key" run-shell "$BINDINGS_DIR/install_plugins"
+	$TMUX_CMD_PATH bind-key "$install_key" run-shell "$BINDINGS_DIR/install_plugins"
 
 	local update_key="$(get_tmux_option "$update_key_option" "$default_update_key")"
-	tmux bind-key "$update_key" run-shell "$BINDINGS_DIR/update_plugins"
+	$TMUX_CMD_PATH bind-key "$update_key" run-shell "$BINDINGS_DIR/update_plugins"
 
 	local clean_key="$(get_tmux_option "$clean_key_option" "$default_clean_key")"
-	tmux bind-key "$clean_key" run-shell "$BINDINGS_DIR/clean_plugins"
+	$TMUX_CMD_PATH bind-key "$clean_key" run-shell "$BINDINGS_DIR/clean_plugins"
 }
 
 supported_tmux_version_ok() {