Nix flake

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -36,6 +36,8 @@ working_dir/
 *.log
 venv/
 **/tmp
+result*
+.direnv/
 
 # Deployment assets
 crates/walrus-orchestrator/assets/

crates/walrus-sdk/src/config.rs

@@ -38,19 +38,23 @@ pub use self::{
 /// Returns the default paths for the Walrus configuration file.
 pub fn default_configuration_paths() -> Vec<PathBuf> {
     const WALRUS_CONFIG_FILE_NAMES: [&str; 2] = ["client_config.yaml", "client_config.yml"];
+    let mut rv = Vec::new();
     let mut directories = vec![PathBuf::from(".")];
-    if let Ok(xdg_config_dir) = std::env::var("XDG_CONFIG_HOME") {
+    if let Ok(xdg_config_dir) = env::var("XDG_CONFIG_HOME") {
         directories.push(xdg_config_dir.into());
     }
     if let Some(home_dir) = home::home_dir() {
         directories.push(home_dir.join(".config").join("walrus"));
         directories.push(home_dir.join(".walrus"));
     }
-    directories
+    rv.extend(directories
         .into_iter()
         .cartesian_product(WALRUS_CONFIG_FILE_NAMES)
-        .map(|(directory, file_name)| directory.join(file_name))
-        .collect()
+        .map(|(directory, file_name)| directory.join(file_name)));
+    if let Ok(wal_config) = env::var("WALRUS_CONFIG") {
+        rv.push(PathBuf::from(wal_config));
+    }
+    rv
 }
 
 /// Loads the Walrus configuration from the given path and context.

crates/walrus-service/src/client/cli/args.rs

@@ -50,6 +50,7 @@ pub struct App {
     /// 2. If the environment variable `XDG_CONFIG_HOME` is set, in `$XDG_CONFIG_HOME/walrus/`.
     /// 3. In `~/.config/walrus/`.
     /// 4. In `~/.walrus/`.
+    /// 5. The environment variable `WALRUS_CONFIG` as complete path
     // NB: Keep this in sync with `crate::cli`.
     #[arg(long, verbatim_doc_comment, global = true)]
     #[serde(