Write nom parser for Grub menuentries

crates/lib/Cargo.toml

@@ -59,17 +59,20 @@ tini = "1.3.0"
 comfy-table = "7.1.1"
 thiserror = { workspace = true }
 canon-json = { workspace = true }
+nom = "8.0.0"
 
 [dev-dependencies]
 similar-asserts = { workspace = true }
 static_assertions = { workspace = true }
 
 [features]
-default = ["install-to-disk"]
+default = ["install-to-disk", "grub"]
 # This feature enables `bootc install to-disk`, which is considered just a "demo"
 # or reference installer; we expect most nontrivial use cases to be using
 # `bootc install to-filesystem`.
 install-to-disk = []
+# Enable direct support for the GRUB bootloader
+grub = []
 # This featuares enables `bootc internals publish-rhsm-facts` to integrate with
 # Red Hat Subscription Manager
 rhsm = []

crates/lib/src/lib.rs

@@ -36,6 +36,8 @@ mod containerenv;
 mod install;
 mod kernel;
 
+#[cfg(feature = "grub")]
+pub(crate) mod parsers;
 #[cfg(feature = "rhsm")]
 mod rhsm;