chore(code): move bls autoconfigure to separate module

src/autoconfigure.rs

@@ -1,101 +1,11 @@
-use crate::actions::ActionDeclaration;
-use crate::actions::chainload::ChainloadConfiguration;
 use crate::config::RootConfiguration;
-use crate::entries::EntryDeclaration;
-use crate::generators::GeneratorDeclaration;
-use crate::generators::bls::BlsConfiguration;
 use anyhow::{Context, Result};
-use uefi::cstr16;
-use uefi::fs::{FileSystem, Path};
+use uefi::fs::FileSystem;
 use uefi::proto::device_path::DevicePath;
-use uefi::proto::device_path::text::{AllowShortcuts, DisplayOnly};
 use uefi::proto::media::fs::SimpleFileSystem;
 
-/// The name prefix of the BLS chainload action that will be used
-/// by the BLS generator to chainload entries.
-const BLS_CHAINLOAD_ACTION_PREFIX: &str = "bls-chainload-";
-
-/// Scan the specified `filesystem` for BLS configurations.
-fn scan_for_bls(
-    filesystem: &mut FileSystem,
-    root: &DevicePath,
-    config: &mut RootConfiguration,
-) -> Result<bool> {
-    // BLS has a loader.conf file that can specify its own auto-entries mechanism.
-    let bls_loader_conf_path = Path::new(cstr16!("\\loader\\loader.conf"));
-    // BLS also has an entries directory that can specify explicit entries.
-    let bls_entries_path = Path::new(cstr16!("\\loader\\entries"));
-
-    // Convert the device path root to a string we can use in the configuration.
-    let mut root = root
-        .to_string(DisplayOnly(false), AllowShortcuts(false))
-        .context("unable to convert device root to string")?
-        .to_string();
-    // Add a trailing slash to the root to ensure the path is valid.
-    root.push('/');
-
-    // Whether we have a loader.conf file.
-    let has_loader_conf = filesystem
-        .try_exists(bls_loader_conf_path)
-        .context("unable to check for BLS loader.conf file")?;
-
-    // Whether we have an entries directory.
-    // We actually iterate the entries to see if there are any.
-    let has_entries_dir = filesystem
-        .read_dir(bls_entries_path)
-        .ok()
-        .and_then(|mut iterator| iterator.next())
-        .map(|entry| entry.is_ok())
-        .unwrap_or(false);
-
-    // Detect if a BLS supported configuration is on this filesystem.
-    // We check both loader.conf and entries directory as only one of them is required.
-    if !(has_loader_conf || has_entries_dir) {
-        return Ok(false);
-    }
-
-    // Generate a unique name for the BLS chainload action.
-    let chainload_action_name = format!("{}{}", BLS_CHAINLOAD_ACTION_PREFIX, root);
-
-    // BLS is now detected, generate a configuration for it.
-    let generator = BlsConfiguration {
-        entry: EntryDeclaration {
-            title: "$title".to_string(),
-            actions: vec![chainload_action_name.clone()],
-            ..Default::default()
-        },
-        path: format!("{}\\loader", root),
-    };
-
-    // Generate a unique name for the BLS generator and insert the generator into the configuration.
-    config.generators.insert(
-        format!("autoconfigure-bls-{}", root),
-        GeneratorDeclaration {
-            bls: Some(generator),
-            ..Default::default()
-        },
-    );
-
-    // Generate a chainload configuration for BLS.
-    // BLS will provide these values to us.
-    let chainload = ChainloadConfiguration {
-        path: format!("{}\\$chainload", root),
-        options: vec!["$options".to_string()],
-        linux_initrd: Some(format!("{}\\$initrd", root)),
-    };
-
-    // Insert the chainload action into the configuration.
-    config.actions.insert(
-        chainload_action_name,
-        ActionDeclaration {
-            chainload: Some(chainload),
-            ..Default::default()
-        },
-    );
-
-    // We had a BLS supported configuration, so return true.
-    Ok(true)
-}
+/// bls: autodetect and configure BLS-enabled systems.
+pub mod bls;
 
 /// Generate a [RootConfiguration] based on the environment.
 /// Intakes a `config` to use as the basis of the autoconfiguration.
@@ -121,8 +31,8 @@ pub fn autoconfigure(config: &mut RootConfiguration) -> Result<()> {
         let mut filesystem = FileSystem::new(filesystem);
 
         // Scan the filesystem for BLS supported configurations.
-        // If we find any, we will add a BLS generator to the configuration.
-        scan_for_bls(&mut filesystem, &root, config).context("unable to scan filesystem")?;
+        bls::scan(&mut filesystem, &root, config)
+            .context("unable to scan for bls configurations")?;
     }
 
     Ok(())