README: mention 'LOHR_CONFIG'

README.org

@@ -73,8 +73,9 @@ variable.
 
 **** Extra remote configuration
 
-=lohr= looks for a =lohr-config.yaml= file in its =LOHR_HOME= directory. This
-file takes the following format:
+=lohr= looks for a =lohr-config.yaml= file in its =LOHR_HOME= directory. The
+=LOHR_CONFIG= variable takes precedence over looking into the state directory.
+This file takes the following format:
 
 #+begin_src yaml
 default_remotes:
@@ -83,12 +84,18 @@ default_remotes:
 
 additional_remotes:
   - "git@git.sr.ht:~user"
+
+blacklist:
+  - "private-.*"
 #+end_src
 
 - ~default_remotes~ is a list of remotes to use if no ~.lohr~ file is found in a
   repository.
 - ~additional_remotes~ is a list of remotes to add in any case, whether the
   original set of remotes is set via ~default_remotes~ or via a =.lohr= file.
+- ~blacklist~ is a list of regular expressions to match against the full
+  repository names. Any that matches will not be mirrored, even if it contains a
+  `.lohr` file.
 
 Both settings take as input a list of "stems", i.e. incomplete remote addresses,
 to which the repo's name will be appended (so for example, if my

flake.nix

@@ -58,6 +58,8 @@
             rustNightly
             rustfmt
           ];
+
+          RUST_SRC_PATH = pkgs.rustPlatform.rustLibSrc;
         };
       });
 }

src/main.rs

@@ -52,6 +52,9 @@ fn repo_updater(rx: Receiver<Job>, homedir: PathBuf, config: GlobalSettings) {
 fn parse_config(mut path: PathBuf) -> anyhow::Result<GlobalSettings> {
     path.push("lohr-config");
     path.set_extension("yaml");
+    let path = env::var("LOHR_CONFIG")
+        .map(Into::into)
+        .unwrap_or_else(|_| path);
     let config = if let Ok(file) = File::open(path.as_path()) {
         serde_yaml::from_reader(file)?
     } else {