✨ Add configurable rules directory support

- Add rules configuration option to ClientConfig
- Support custom rules file paths via config and CLI
- Add --rules-dir option to init command
- Update Rules struct to accept custom file paths
- Add helper functions for rules path resolution
- Fix doc comment formatting issues
- Add integration tests for custom rules paths

src/cli/main.rs

@@ -539,6 +539,24 @@ async fn run_rules(client: &mut GmailClient, rules: Rules, execute: bool) -> Res
 /// - Container deployments with injected token environment variables
 /// - CI/CD pipelines with stored token secrets
 /// - Ephemeral compute environments requiring periodic Gmail access
+fn restore_tokens_if_available(config: &Config, client_config: &ClientConfig) -> Result<()> {
+    let token_env_var = config
+        .get_string("token_cache_env")
+        .unwrap_or_else(|_| "CULL_GMAIL_TOKEN_CACHE".to_string());
+
+    if let Ok(token_data) = env::var(&token_env_var) {
+        log::info!("Found {token_env_var} environment variable, restoring tokens");
+        restore_tokens_from_string(&token_data, client_config.persist_path())?;
+        log::info!("Tokens successfully restored from environment variable");
+    } else {
+        log::debug!(
+            "No {token_env_var} environment variable found, proceeding with normal token flow"
+        );
+    }
+
+    Ok(())
+}
+
 /// Gets the rules file path from configuration.
 ///
 /// Reads the `rules` configuration value and resolves it using path prefixes.
@@ -566,24 +584,6 @@ fn get_rules_path(config: &Config) -> Result<Option<PathBuf>> {
     Ok(Some(path))
 }
 
-fn restore_tokens_if_available(config: &Config, client_config: &ClientConfig) -> Result<()> {
-    let token_env_var = config
-        .get_string("token_cache_env")
-        .unwrap_or_else(|_| "CULL_GMAIL_TOKEN_CACHE".to_string());
-
-    if let Ok(token_data) = env::var(&token_env_var) {
-        log::info!("Found {token_env_var} environment variable, restoring tokens");
-        restore_tokens_from_string(&token_data, client_config.persist_path())?;
-        log::info!("Tokens successfully restored from environment variable");
-    } else {
-        log::debug!(
-            "No {token_env_var} environment variable found, proceeding with normal token flow"
-        );
-    }
-
-    Ok(())
-}
-
 /// Executes the specified end-of-life action on messages for a Gmail label.
 ///
 /// This function performs the actual message operations (trash or delete) based on

src/cli/rules_cli.rs

@@ -342,6 +342,7 @@ impl RulesCli {
 /// - **Rules CLI**: To load rules before configuration or execution
 /// - **Main CLI**: For default rule execution when no subcommand is specified
 /// - **Validation systems**: To verify rule configuration integrity
+///
 /// Loads rules from the default location.
 pub fn get_rules() -> Result<Rules> {
     get_rules_from(None)

src/rules.rs

@@ -45,7 +45,7 @@ use std::{
     collections::BTreeMap,
     env,
     fs::{self, read_to_string},
-    path::{Path, PathBuf},
+    path::Path,
 };
 
 use serde::{Deserialize, Serialize};
@@ -524,8 +524,9 @@ impl Rules {
         let save_path = if let Some(p) = path {
             p.to_path_buf()
         } else {
-            let home_dir = env::home_dir()
-                .ok_or_else(|| Error::HomeExpansionFailed("~/.cull-gmail/rules.toml".to_string()))?;
+            let home_dir = env::home_dir().ok_or_else(|| {
+                Error::HomeExpansionFailed("~/.cull-gmail/rules.toml".to_string())
+            })?;
             home_dir.join(".cull-gmail/rules.toml")
         };
 
@@ -600,8 +601,9 @@ impl Rules {
         let load_path = if let Some(p) = path {
             p.to_path_buf()
         } else {
-            let home_dir = env::home_dir()
-                .ok_or_else(|| Error::HomeExpansionFailed("~/.cull-gmail/rules.toml".to_string()))?;
+            let home_dir = env::home_dir().ok_or_else(|| {
+                Error::HomeExpansionFailed("~/.cull-gmail/rules.toml".to_string())
+            })?;
             home_dir.join(".cull-gmail/rules.toml")
         };
 

tests/init_integration_tests.rs

@@ -92,9 +92,7 @@ fn test_init_with_separate_rules_directory() {
         &format!("c:{}", rules_dir.to_string_lossy()),
     ]);
 
-    cmd.assert()
-        .success()
-        .stdout(predicate::str::contains(
+    cmd.assert().success().stdout(predicate::str::contains(
         "Initialization completed successfully!",
     ));