fix(Launcher): add option for inheriting parent environment

Author: ShadowApex

core/global/launch_manager.gd

@@ -338,6 +338,8 @@ func _launch(app: LibraryLaunchItem) -> RunningApp:
 	var user_env = settings_manager.get_value(section, env_key, {})
 	if user_env and user_env is Dictionary and not (user_env as Dictionary).is_empty():
 		env = user_env
+	var inherit_environment_key := ".".join(["inherit_parent_environment", app._provider_id])
+	var inherit_environment := settings_manager.get_value(section, inherit_environment_key, true) as bool
 	var sandboxing_key := ".".join(["use_sandboxing", app._provider_id])
 	var use_sandboxing := settings_manager.get_value(section, sandboxing_key, false) as bool
 
@@ -351,6 +353,15 @@ func _launch(app: LibraryLaunchItem) -> RunningApp:
 	# Set the OGUI ID environment variable
 	env["OGUI_ID"] = app.name
 
+	# Set certain environment variables when not inheriting the parent environment
+	if not inherit_environment:
+		if not "HOME" in env:
+			env["HOME"] = OS.get_environment("HOME")
+		if not "XDG_SESSION_TYPE" in env:
+			env["XDG_SESSION_TYPE"] = "x11"
+		if not "XDG_RUNTIME_DIR" in env:
+			env["XDG_RUNTIME_DIR"] = OS.get_environment("XDG_RUNTIME_DIR")
+
 	# Build any environment variables to include in the command
 	var env_vars := PackedStringArray()
 	for key in env.keys():
@@ -364,6 +375,8 @@ func _launch(app: LibraryLaunchItem) -> RunningApp:
 	# Build the launch command to run
 	var exec := "env"
 	var command := ["-C", cwd]
+	if not inherit_environment:
+		command.push_front("-i")
 	command.append_array(env_vars)
 	command.append_array(sandbox)
 	command.append(cmd)

core/ui/common/launch/game_launch_settings.gd

@@ -20,6 +20,7 @@ var provider_id: String
 @onready var cwd_input := $%CWDTextInput
 @onready var env_input := $%EnvTextInput
 @onready var sandbox_toggle := $%UseSandboxToggle as Toggle
+@onready var inherit_env_toggle := $%InheritEnvironmentToggle as Toggle
 
 
 # Called when the node enters the scene tree for the first time.
@@ -31,6 +32,7 @@ func _ready() -> void:
 	cwd_input.focus_exited.connect(_on_input_update.bind(cwd_input, "cwd"))
 	env_input.focus_exited.connect(_on_input_update.bind(env_input, "env", UPDATE.DICT))
 	sandbox_toggle.toggled.connect(_on_toggle_update.bind(sandbox_toggle, "use_sandboxing"))
+	inherit_env_toggle.toggled.connect(_on_toggle_update.bind(inherit_env_toggle, "inherit_parent_environment"))
 
 
 func _on_game_settings_entered(_from: State) -> void:
@@ -98,6 +100,8 @@ func _on_provider_selected(idx: int) -> void:
 		sandbox_toggle.button_pressed = use_sandboxing
 	else:
 		sandbox_toggle.button_pressed = true
+	var inherit_env := settings_manager.get_value(settings_section, ".".join(["inherit_parent_environment", provider_id]), true) as bool
+	inherit_env_toggle.button_pressed = inherit_env
 
 
 # Converts the given dictionary into a string representation. E.g. foo=bar

core/ui/common/launch/game_launch_settings.tscn

@@ -72,6 +72,13 @@ layout_mode = 2
 title = "Environment Variables"
 description = "Environment variables to use when launching the game"
 
+[node name="InheritEnvironmentToggle" parent="MarginContainer/VBoxContainer" instance=ExtResource("7_5wp75")]
+unique_name_in_owner = true
+layout_mode = 2
+text = "Inherit Parent Environment"
+separator_visible = false
+description = "Whether or not environment variables should be inherited from the current session"
+
 [node name="SandboxSettingsLabel" parent="MarginContainer/VBoxContainer" instance=ExtResource("4_m05uu")]
 layout_mode = 2
 text = "Sandbox Settings"