U key binding shows a list of installed plugins

scripts/install_plugins.sh

@@ -4,13 +4,6 @@ CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 source "$CURRENT_DIR/shared_functions.sh"
 
-# TMUX messaging is weird. You only get a nice clean pane if you do it with
-# `run-shell` command.
-echo_message() {
-	local message=$1
-	tmux run-shell "echo '$message'"
-}
-
 end_message() {
 	echo_message ""
 	echo_message "TMUX environment reloaded."
@@ -33,13 +26,6 @@ clone_plugin() {
 		clone "https://github.com/$plugin"
 }
 
-plugin_already_cloned() {
-	local plugin=$1
-	local plugin_path=$(shared_plugin_path "$plugin")
-	cd $plugin_path &&
-		git remote
-}
-
 pull_changes() {
 	local plugin=$1
 	local plugin_path=$(shared_plugin_path "$plugin")
@@ -51,7 +37,7 @@ pull_changes() {
 # pull new changes or clone plugin
 install_plugin() {
 	local plugin=$1
-	if plugin_already_cloned "$plugin"; then
+	if plugin_already_installed "$plugin"; then
 		# plugin is already installed
 		echo_message "Already installed $plugin"
 	else

scripts/shared_functions.sh

@@ -29,3 +29,21 @@ shared_plugin_path() {
 	local plugin_name=$(shared_plugin_name "$plugin")
 	echo "$SHARED_TPM_PATH$plugin_name/"
 }
+
+# TMUX messaging is weird. You only get a nice clean pane if you do it with
+# `run-shell` command.
+echo_message() {
+	local message="$1"
+	tmux run-shell "echo '$message'"
+}
+
+reload_tmux_environment() {
+	tmux source-file ~/.tmux.conf >/dev/null 2>&1
+}
+
+plugin_already_installed() {
+	local plugin=$1
+	local plugin_path=$(shared_plugin_path "$plugin")
+	cd $plugin_path &&
+		git remote >/dev/null 2>&1
+}

scripts/update_plugin.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# when invoked with `prefix + U` this script:
+# - shows a list of installed plugins
+# - starts a prompt to enter the name of the plugin that will be updated
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+source "$CURRENT_DIR/shared_functions.sh"
+
+display_plugin_update_list() {
+	local plugins="$(shared_get_tpm_plugins_list)"
+	for plugin in $plugins; do
+		# displaying only installed plugins
+		if plugin_already_cloned "$plugin"; then
+			echo_message "$plugin"
+		fi
+	done
+}
+
+update_plugin_prompt() {
+	tmux command-prompt -p 'plugin update:' " \
+		send-keys C-m; \
+		run-shell '$CURRENT_DIR/update_plugin.sh %1'"
+}
+
+
+main() {
+	reload_tmux_environment
+	shared_set_tpm_path_constant
+	display_plugin_update_list
+	update_plugin_prompt
+}
+main

scripts/update_plugin_prompt.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+# when invoked with `prefix + U` this script:
+# - shows a list of installed plugins
+# - starts a prompt to enter the name of the plugin that will be updated
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+source "$CURRENT_DIR/shared_functions.sh"
+
+display_plugin_update_list() {
+	local plugins="$(shared_get_tpm_plugins_list)"
+	echo_message "Installed plugins:"
+	echo_message ""
+
+	for plugin in $plugins; do
+		# displaying only installed plugins
+		if plugin_already_installed "$plugin"; then
+			echo_message "  $plugin"
+		fi
+	done
+
+	echo_message ""
+	echo_message "Type (full) plugin name to update it."
+	echo_message "* - updates all."
+	echo_message ""
+	echo_message "ENTER - cancels"
+}
+
+update_plugin_prompt() {
+	tmux command-prompt -p 'plugin update:' " \
+		send-keys C-m; \
+		run-shell '$CURRENT_DIR/update_plugin.sh %1'"
+}
+
+
+main() {
+	reload_tmux_environment
+	shared_set_tpm_path_constant
+	display_plugin_update_list
+	update_plugin_prompt
+}
+main

tpm

@@ -27,6 +27,7 @@ source_plugins() {
 # prefix + I - downloads TPM plugins and reloads TMUX environment.
 set_tpm_key_binding() {
 	tmux bind-key I run-shell "$CURRENT_DIR/scripts/install_plugins.sh >/dev/null 2>&1"
+	tmux bind-key U run-shell "$CURRENT_DIR/scripts/update_plugin_prompt.sh"
 }
 
 supported_tmux_version_ok() {