New and old plugin syntax work together

CHANGELOG.md

@@ -8,6 +8,8 @@
 - revert back to using `-g` flag in new plugin definition syntax
 - permit leading whitespace with new plugin definition syntax (thanks @chilicuil)
 - make sure `TMUX_PLUGIN_MANAGER_PATH` always has trailng slash
+- ensure old/deprecated plugin syntax `set -g @tpm_plugins` works alongside new
+  `set -g @plugin` syntax
 
 ### v1.2.2, 2015-02-08
 - set GIT_TERMINAL_PROMPT=0 when doing `git clone`, `pull` or `submodule update`

scripts/shared_functions.sh

@@ -1,5 +1,6 @@
 # shared functions and constants
 
+# using @tpm_plugins is now deprecated in favor of using @plugin syntax
 tpm_plugins_variable_name="@tpm_plugins"
 SHARED_TPM_PATH=""
 
@@ -11,16 +12,17 @@ shared_set_tpm_path_constant() {
 	SHARED_TPM_PATH="$(echo "$string_path" | sed "s,^\$HOME,$HOME," | sed "s,^~,$HOME,")"
 }
 
+_tmux_conf_contents() {
+	cat /etc/tmux.conf ~/.tmux.conf 2>/dev/null
+}
+
 shared_get_tpm_plugins_list() {
-	local plugins_list
-	plugins_list="$(tmux show-option -gqv "$tpm_plugins_variable_name")"
-	if [ -z "${plugins_list}" ]; then
-		#read set -g @plugin "tmux-plugins/tmux-example-plugin" entries
-		cat /etc/tmux.conf ~/.tmux.conf 2>/dev/null |
+	# DEPRECATED: lists plugins from @tpm_plugins option
+	echo "$(tmux show-option -gqv "$tpm_plugins_variable_name")"
+
+	# read set -g @plugin "tmux-plugins/tmux-example-plugin" entries
+	_tmux_conf_contents |
 		awk '/^ *set +-g +@plugin/ { gsub(/'\''/,""); gsub(/'\"'/,""); print $4 }'
-	else
-		printf "%s\\n" "${plugins_list}"
-	fi
 }
 
 # Allowed plugin name formats:

tests/test_plugin_installation_legacy.sh

@@ -21,8 +21,32 @@ test_plugin_installation() {
 	teardown_helper
 }
 
+test_legacy_and_new_syntax_for_plugin_installation_work() {
+	set_tmux_conf_helper <<- HERE
+	set -g @tpm_plugins "                   \
+		tmux-plugins/tmux-example-plugin    \
+	"
+	set -g @plugin 'tmux-plugins/tmux-copycat'
+	run-shell "$PWD/tpm"
+	HERE
+
+	# opens tmux and test it with `expect`
+	"$CURRENT_DIR"/expect_successful_multiple_plugins_download ||
+		fail_helper "Tmux multiple plugins installation fails"
+
+	# check plugin dir exists after download
+	check_dir_exists_helper "$HOME/.tmux/plugins/tmux-example-plugin/" ||
+		fail_helper "Plugin download fails (tmux-example-plugin)"
+
+	check_dir_exists_helper "$HOME/.tmux/plugins/tmux-copycat/" ||
+		fail_helper "Plugin download fails (tmux-copycat)"
+
+	teardown_helper
+}
+
 main() {
 	test_plugin_installation
+	test_legacy_and_new_syntax_for_plugin_installation_work
 	exit_value_helper
 }
 main