rust: add qemu-api doctests to "meson test"

Doctests are weird.  They are essentially integration tests, but they're
"ran" by executing rustdoc --test, which takes a compiler-ish
command line.  This is supported by Meson 1.8.0.

Because they run the linker and need all the .o files, run them in the
build jobs rather than the test jobs.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

4 files changed, 16 insertions, 9 deletions

diff --git a/.gitlab-ci.d/buildtest-template.yml b/.gitlab-ci.d/buildtest-template.yml
index 118371e..fea4e8d 100644
--- a/.gitlab-ci.d/buildtest-template.yml
+++ b/.gitlab-ci.d/buildtest-template.yml
@@ -76,7 +76,8 @@
       fi
     - section_end buildenv
     - section_start test "Running tests"
-    - $MAKE NINJA=":" $MAKE_CHECK_ARGS
+    # doctests need all the compilation artifacts
+    - $MAKE NINJA=":" MTESTARGS="--no-suite doc" $MAKE_CHECK_ARGS
     - section_end test
 
 .native_test_job_template:
diff --git a/.gitlab-ci.d/buildtest.yml b/.gitlab-ci.d/buildtest.yml
index ca1a9c6..d888a60 100644
--- a/.gitlab-ci.d/buildtest.yml
+++ b/.gitlab-ci.d/buildtest.yml
@@ -41,7 +41,7 @@ build-system-ubuntu:
     IMAGE: ubuntu2204
     CONFIGURE_ARGS: --enable-docs --enable-rust
     TARGETS: alpha-softmmu microblazeel-softmmu mips64el-softmmu
-    MAKE_CHECK_ARGS: check-build
+    MAKE_CHECK_ARGS: check-build check-doc
 
 check-system-ubuntu:
   extends: .native_test_job_template
@@ -115,7 +115,7 @@ build-system-fedora:
     CONFIGURE_ARGS: --disable-gcrypt --enable-nettle --enable-docs --enable-crypto-afalg --enable-rust
     TARGETS: microblaze-softmmu mips-softmmu
       xtensa-softmmu m68k-softmmu riscv32-softmmu ppc-softmmu sparc64-softmmu
-    MAKE_CHECK_ARGS: check-build
+    MAKE_CHECK_ARGS: check-build check-doc
 
 build-system-fedora-rust-nightly:
   extends:
@@ -127,12 +127,7 @@ build-system-fedora-rust-nightly:
     IMAGE: fedora-rust-nightly
     CONFIGURE_ARGS: --disable-docs --enable-rust --enable-strict-rust-lints
     TARGETS: aarch64-softmmu
-    MAKE_CHECK_ARGS: check-build
-  after_script:
-    - source scripts/ci/gitlab-ci-section
-    - section_start test "Running Rust doctests"
-    - cd build
-    - pyvenv/bin/meson devenv -w ../rust ${CARGO-cargo} test --doc -p qemu_api
+    MAKE_CHECK_ARGS: check-build check-doc
 
   allow_failure: true
 
diff --git a/docs/devel/rust.rst b/docs/devel/rust.rst
index 11328c0..f66f2be 100644
--- a/docs/devel/rust.rst
+++ b/docs/devel/rust.rst
@@ -66,6 +66,8 @@ be run via ``meson test`` or ``make``::
 
    make check-rust
 
+Note that doctests require all ``.o`` files from the build to be available.
+
 Supported tools
 '''''''''''''''
 
diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build
index 6206835..b532281 100644
--- a/rust/qemu-api/meson.build
+++ b/rust/qemu-api/meson.build
@@ -45,6 +45,15 @@ rust.test('rust-qemu-api-tests', _qemu_api_rs,
 qemu_api = declare_dependency(link_with: [_qemu_api_rs],
   dependencies: [qemu_api_macros, qom, hwcore, chardev, migration])
 
+# Doctests are essentially integration tests, so they need the same dependencies.
+# Note that running them requires the object files for C code, so place them
+# in a separate suite that is run by the "build" CI jobs rather than "check".
+rust.doctest('rust-qemu-api-doctests',
+     _qemu_api_rs,
+     protocol: 'rust',
+     dependencies: qemu_api,
+     suite: ['doc', 'rust'])
+
 test('rust-qemu-api-integration',
     executable(
         'rust-qemu-api-integration',