xtask: Implement bcvk-based tmt test runner

For local tests, right now testcloud+tmt doesn't support UEFI, see
teemtee/tmt#4203

This is a blocker for us doing more testing with UKIs.

In this patch we switch to provisioning VMs with bcvk, which
fixes this - but beyond that a really compelling thing about
this is that bcvk is *also* designed to be ergonomic and efficient
beyond just being a test runner, with things like virtiofs
mounting of host container storage, etc.

In other words, bcvk is the preferred way to run local virt
with bootc, and this makes our TMT tests use it.

Now a major downside of this though is we're effectively
implementing a new "provisioner" for tmt (bypassing the
existing `virtual`). In the more medium term I think we
want to add `bcvk` as a provisioner option to tmt.

Anyways for now, this works by discovers test plans via `tmt plan ls`,
spawning a separate VM per test, and then using uses tmt's connect
provisioner to run tests targeting these externally provisioned
systems.

Assisted-by: Claude Code (Sonnet 4.5)
Signed-off-by: Colin Walters <[email protected]>

Author: cgwalters

Justfile

@@ -63,18 +63,17 @@ build-disk *ARGS:
 # updates are supported) as if it were a production environment use
 # https://github.com/teemtee/tmt.
 #
-# This task runs *all* of the tmt-based tests targeting the disk image generated
-# in the previous step.
-test-tmt *ARGS: build-disk
-    ./tests/run-tmt.sh {{ARGS}}
+# This task runs *all* of the tmt-based tests using bcvk VMs
+test-tmt *ARGS: build-integration-test-image
+    cargo xtask run-tmt localhost/bootc-integration {{ARGS}}
 
-# Like test-tmt but assumes that a disk image is already built
+# Like test-tmt but assumes that the integration image is already built
 test-tmt-nobuild *ARGS:
-    ./tests/run-tmt.sh {{ARGS}}
+    cargo xtask run-tmt localhost/bootc-integration {{ARGS}}
 
-# Run just one tmt test: `just test-tmt-one test-20-local-upgrade`
-test-tmt-one PLAN: build-disk
-    ./tests/run-tmt.sh plan --name {{PLAN}}
+# Run just one tmt test: `just test-tmt-one readonly-tests`
+test-tmt-one PLAN: build-integration-test-image
+    cargo xtask run-tmt localhost/bootc-integration {{PLAN}}
 
 # Run tests (unit and integration) that are containerized
 test-container: build-units build-integration-test-image

crates/xtask/src/man.rs

@@ -398,7 +398,7 @@ pub fn sync_all_man_pages(sh: &Shell) -> Result<()> {
 
 /// Generate man pages from hand-written markdown sources
 #[context("Generating manpages")]
-pub fn generate_man_pages(sh: &Shell) -> Result<()> {
+pub fn generate_man_pages(sh: &Shell, _args: &[String]) -> Result<()> {
     let man_src_dir = Utf8Path::new("docs/src/man");
     let man_output_dir = Utf8Path::new("target/man");