cli: Add new state wipe-ostree subcommand

Solves containers#776

Right now the integration tests have some hacky code to clear out
`ostree` stateroots  (see `reset_root` function), it would be better if
they could rely on a bootc command to take care of that for them instead

This commit adds a new `state wipe-ostree` subcommand to the CLI that
removes all `ostree` deployments from the system using native ostree
bindings. This makes it easier to later rm -rf the stateroots and have a
clean slate for the next test.

lib/src/cli.rs

@@ -21,6 +21,7 @@ use ostree_ext::keyfileext::KeyFileExt;
 use ostree_ext::ostree;
 use schemars::schema_for;
 
+use crate::deploy::wipe_ostree;
 use crate::deploy::RequiredHostSpec;
 use crate::lints;
 use crate::spec::Host;
@@ -294,6 +295,12 @@ pub(crate) enum InternalsOpts {
     Cleanup,
 }
 
+#[derive(Debug, clap::Subcommand, PartialEq, Eq)]
+pub(crate) enum StateOpts {
+    /// Remove all ostree deployments from this system
+    WipeOstree,
+}
+
 impl InternalsOpts {
     /// The name of the binary we inject into /usr/lib/systemd/system-generators
     const GENERATOR_BIN: &'static str = "bootc-systemd-generator";
@@ -424,6 +431,10 @@ pub(crate) enum Opt {
         #[clap(trailing_var_arg = true, allow_hyphen_values = true)]
         args: Vec<OsString>,
     },
+    /// Modify the state of the system
+    #[clap(hide = true)]
+    #[clap(subcommand)]
+    State(StateOpts),
     #[clap(subcommand)]
     #[clap(hide = true)]
     Internals(InternalsOpts),
@@ -914,6 +925,14 @@ async fn run_from_opt(opt: Opt) -> Result<()> {
         },
         #[cfg(feature = "docgen")]
         Opt::Man(manopts) => crate::docgen::generate_manpages(&manopts.directory),
+        Opt::State(opts) => match opts {
+            StateOpts::WipeOstree => {
+                let sysroot = ostree::Sysroot::new_default();
+                sysroot.load(gio::Cancellable::NONE)?;
+                wipe_ostree(&sysroot).await?;
+                Ok(())
+            }
+        },
     }
 }
 

lib/src/deploy.rs

@@ -16,8 +16,8 @@ use ostree_container::OstreeImageReference;
 use ostree_ext::container as ostree_container;
 use ostree_ext::container::store::{ImportProgress, PrepareResult};
 use ostree_ext::oci_spec::image::Descriptor;
-use ostree_ext::ostree;
 use ostree_ext::ostree::Deployment;
+use ostree_ext::ostree::{self, Sysroot};
 use ostree_ext::sysroot::SysrootLock;
 
 use crate::spec::ImageReference;
@@ -288,6 +288,14 @@ pub(crate) async fn prune_container_store(sysroot: &Storage) -> Result<()> {
     Ok(())
 }
 
+pub(crate) async fn wipe_ostree(sysroot: &Sysroot) -> Result<()> {
+    sysroot
+        .write_deployments(&[], gio::Cancellable::NONE)
+        .context("removing deployments")?;
+
+    Ok(())
+}
+
 pub(crate) async fn cleanup(sysroot: &Storage) -> Result<()> {
     let bound_prune = prune_container_store(sysroot);
 

tests-integration/src/install.rs

@@ -1,4 +1,3 @@
-use std::path::Path;
 use std::{os::fd::AsRawFd, path::PathBuf};
 
 use anyhow::Result;
@@ -23,18 +22,20 @@ pub(crate) const BASE_ARGS: &[&str] = &[
     "label=disable",
 ];
 
-// Clear out and delete any ostree roots
-fn reset_root(sh: &Shell) -> Result<()> {
-    // TODO fix https://github.com/containers/bootc/pull/137
-    if !Path::new("/ostree/deploy/default").exists() {
-        return Ok(());
-    }
+/// Clear out and delete any ostree roots, leverage bootc hidden wipe-ostree command to get rid of
+/// otherwise hard to delete deployment files
+fn reset_root(sh: &Shell, image: &str) -> Result<()> {
+    // Without /boot ostree will not delete anything
+    let mounts = &["-v", "/ostree:/ostree", "-v", "/boot:/boot"];
+
     cmd!(
         sh,
-        "sudo /bin/sh -c 'chattr -i /ostree/deploy/default/deploy/*'"
+        "sudo {BASE_ARGS...} {mounts...} {image} bootc state wipe-ostree"
     )
     .run()?;
-    cmd!(sh, "sudo rm /ostree/deploy/default -rf").run()?;
+
+    // Now that the hard to delete files are gone, we can just rm -rf the rest
+    cmd!(sh, "sudo /bin/sh -c 'rm -rf /ostree/deploy/*'").run()?;
     Ok(())
 }
 
@@ -76,7 +77,7 @@ pub(crate) fn run_alongside(image: &str, mut testargs: libtest_mimic::Arguments)
     let tests = [
         Trial::test("loopback install", move || {
             let sh = &xshell::Shell::new()?;
-            reset_root(sh)?;
+            reset_root(sh, image)?;
             let size = 10 * 1000 * 1000 * 1000;
             let mut tmpdisk = tempfile::NamedTempFile::new_in("/var/tmp")?;
             tmpdisk.as_file_mut().set_len(size)?;
@@ -89,7 +90,7 @@ pub(crate) fn run_alongside(image: &str, mut testargs: libtest_mimic::Arguments)
             "replace=alongside with ssh keys and a karg, and SELinux disabled",
             move || {
                 let sh = &xshell::Shell::new()?;
-                reset_root(sh)?;
+                reset_root(sh, image)?;
                 let tmpd = &sh.create_temp_dir()?;
                 let tmp_keys = tmpd.path().join("test_authorized_keys");
                 let tmp_keys = tmp_keys.to_str().unwrap();
@@ -128,7 +129,7 @@ pub(crate) fn run_alongside(image: &str, mut testargs: libtest_mimic::Arguments)
         ),
         Trial::test("Install and verify selinux state", move || {
             let sh = &xshell::Shell::new()?;
-            reset_root(sh)?;
+            reset_root(sh, image)?;
             cmd!(sh, "sudo {BASE_ARGS...} {target_args...} {image} bootc install to-existing-root --acknowledge-destructive {generic_inst_args...}").run()?;
             generic_post_install_verification()?;
             let root = &Dir::open_ambient_dir("/ostree", cap_std::ambient_authority()).unwrap();
@@ -138,7 +139,7 @@ pub(crate) fn run_alongside(image: &str, mut testargs: libtest_mimic::Arguments)
         }),
         Trial::test("without an install config", move || {
             let sh = &xshell::Shell::new()?;
-            reset_root(sh)?;
+            reset_root(sh, image)?;
             let empty = sh.create_temp_dir()?;
             let empty = empty.path().to_str().unwrap();
             cmd!(sh, "sudo {BASE_ARGS...} {target_args...} -v {empty}:/usr/lib/bootc/install {image} bootc install to-existing-root {generic_inst_args...}").run()?;