feat: add error messaging (#1576)

This creates a custom logger for the log crate which logs everything to a file (/tmp/starship/session_$STARSHIP_SESSION_KEY.log) and it logs everything above Warn to stderr, but only if the log file does not contain the line that should be logged resulting in an error or warning to be only logged at the first starship invocation after opening the shell.

1 files changed, 3 insertions, 3 deletions

diff --git a/starship_module_config_derive/src/lib.rs b/starship_module_config_derive/src/lib.rs
index db2e275eb..b6d11326a 100644
--- a/starship_module_config_derive/src/lib.rs
+++ b/starship_module_config_derive/src/lib.rs
@@ -1,6 +1,3 @@
-extern crate proc_macro;
-extern crate proc_macro2;
-
 use proc_macro::TokenStream;
 use quote::quote;
 use syn::{parse_macro_input, DeriveInput};
@@ -50,6 +47,9 @@ fn impl_module_config(dinput: DeriveInput) -> proc_macro::TokenStream {
                 fn load_config(&self, config: &'a toml::Value) -> Self {
                     let mut new_module_config = self.clone();
                     if let toml::Value::Table(config) = config {
+                        if config.get("prefix").is_some() || config.get("suffix").is_some() {
+                            log::warn!("You're using the outdated config format! Migrate your config here: https://starship.rs/migrating-to-0.45.0/")
+                        }
                         #load_tokens
                     }
                     new_module_config