print config file location if not present

Author: maddyblue

README.md

@@ -18,7 +18,7 @@ The [latest release](https://github.com/mjibson/acre/releases/latest) is availab
 
 # Configuration
 
-Configuration (which servers to run) is handled by a file at `~/.config/acre.toml` (note: I'm not sure if this is true on OSX). The file should contain an array of `servers` objects with the fields:
+Configuration (which servers to run) is handled by a file at `~/.config/acre.toml` (note: I'm not sure if this is true on OSX, but the location will be printed in an error if it does not exist). The file should contain an array of `servers` objects with the fields:
 
 - `name`: the name of the server.
 - `executable` (optional): the name of the binary to invoke. If not present, uses `name`.

src/main.rs

@@ -36,10 +36,9 @@ fn main() -> Result<()> {
 	let config = match dir.find_config_file(ACRE_TOML) {
 		Some(c) => c,
 		None => {
-			println!(
-				"could not find {} in config location (maybe ~/.config/acre.toml)",
-				ACRE_TOML,
-			);
+			let mut path = dir.get_config_home();
+			path.push(ACRE_TOML);
+			eprintln!("could not find {}", path.to_str().unwrap());
 			std::process::exit(1);
 		}
 	};