dorothy: add uninstall action

commands/dorothy

@@ -1000,6 +1000,28 @@ function dorothy() (
 		fi
 	}
 
+	function remove_shell_configuration {
+		# bash
+		config-helper --file="$HOME/.bash_profile" -- \
+			--find='source ".+?" # Dorothy' --replace=''
+		config-helper --file="$HOME/.bashrc" -- \
+			--find='source ".+?" # Dorothy' --replace=''
+
+		# zsh
+		mkdir -p "$ZDOTDIR"
+		config-helper --file="$ZDOTDIR/.zshrc" -- \
+			--find='source ".+?" # Dorothy' --replace=''
+		config-helper --file="$ZDOTDIR/.zprofile" -- \
+			--find='source ".+?" # Dorothy' --replace=''
+		config-helper --file="$HOME/.zshenv" -- \
+			--find='ZDOTDIR=.+' --replace="ZDOTDIR=\"$ZDOTDIR\""
+
+		# fish
+		mkdir -p "$HOME/.config/fish"
+		config-helper --file="$HOME/.config/fish/config.fish" -- \
+			--find='source ".+?" # Dorothy' --replace=''
+	}
+
 	# =====================================
 	# Actions: Install, Update, Trial
 
@@ -1015,7 +1037,31 @@ function dorothy() (
 		echo-segment --g1='Install Dorothy'
 
 		# log success
-		echo-style --success='Dorothy is now setup. ' --notice='Restart your terminal.'
+		echo-style --success='Dorothy is now setup.' ' ' --notice='Restart your terminal.'
+	}
+
+	function act_uninstall {
+		ensure_dorothy_configured
+		assert_dorothy_configured
+		ensure_minimal_dependencies
+
+		echo-segment --h1='Uninstall Dorothy'
+		remove_shell_configuration
+		echo-segment --g1='Uninstall Dorothy'
+
+		# log success and instructions for removal
+		echo-style --success='Dorothy is now uninstalled.' ' ' --notice='Restart your terminal.'
+		local paths=()
+		if test -d "$DOROTHY"; then
+			paths+=("$DOROTHY")
+		fi
+		if test -d "$DOROTHY/user"; then
+			paths+=("$(fs-realpath -- "$DOROTHY/user")")
+		fi
+		if test "${#paths[@]}" -ne 0; then
+			echo 'Once you have restarted your terminal, you can delete Dorothy by removing the following paths:'
+			echo-lines "${paths[@]}"
+		fi
 	}
 
 	function act_update {