cli: add build-lint

add simple lint to check that we only have one kernel in
image.

fixes: containers#216
Co-authored-by: Joseph Marrero <[email protected]>
Co-authored-by: Huijing Hei <[email protected]>

lib/src/cli.rs

@@ -12,6 +12,7 @@ use ostree_container::store::PrepareResult;
 use ostree_ext::container as ostree_container;
 use ostree_ext::keyfileext::KeyFileExt;
 use ostree_ext::ostree;
+use tracing::field::debug;
 use std::ffi::OsString;
 use std::io::Seek;
 use std::os::unix::process::CommandExt;
@@ -212,6 +213,8 @@ pub(crate) enum Opt {
     #[clap(subcommand)]
     #[cfg(feature = "install")]
     Install(InstallOpts),
+    /// Validate non supported files are not present.
+    BuildLint,
     /// Execute the given command in the host mount namespace
     #[cfg(feature = "install")]
     #[clap(hide = true)]
@@ -512,6 +515,27 @@ async fn usroverlay() -> Result<()> {
         .into());
 }
 
+/// Implementation of `bootc build commit`
+/// async fn lint() -> Result<()> {
+fn lint() -> Result<()> {
+    // TODO: Check if 1 or more folder under the /lib/modules/ directory
+    println!("Checking if we are in the container");
+    if ostree_ext::container_utils::is_ostree_container()? {
+        let modules_path = cap_std::fs::Dir::open_ambient_dir("lib/modules", cap_std::ambient_authority())?;
+        for entry in modules_path.entries()? {
+            let dir = entry?;
+            let fileName= dir.file_name();
+            debug(fileName);
+
+        }
+        return Ok(());
+    }
+    anyhow::bail!(
+        "Not in a ostree container, this command only verifies ostree containers."
+    );
+
+}
+
 /// Parse the provided arguments and execute.
 /// Calls [`structopt::clap::Error::exit`] on failure, printing the error message and aborting the program.
 pub async fn run_from_iter<I>(args: I) -> Result<()>
@@ -529,6 +553,7 @@ async fn run_from_opt(opt: Opt) -> Result<()> {
         Opt::Switch(opts) => switch(opts).await,
         Opt::Edit(opts) => edit(opts).await,
         Opt::UsrOverlay => usroverlay().await,
+        Opt::BuildLint => lint(),
         #[cfg(feature = "install")]
         Opt::Install(opts) => match opts {
             InstallOpts::ToDisk(opts) => crate::install::install_to_disk(opts).await,