ci: Add analysis phase

Run the static analysis tool from clang, and ASan.

.gitlab-ci.yml

 stages:
   - check
   - build
+  - analysis
   - docs
   - deploy
 
@@ -21,6 +22,29 @@ stages:
     paths:
       - "_build/meson-logs"
 
+.build-scan:
+  script:
+    - meson setup ${MESON_EXTRA_FLAGS} --prefix /usr _scan_build .
+    - ninja -C _scan_build scan-build
+  artifacts:
+    name: "json-glib-static-scan-${CI_COMMIT_REF_NAME}"
+    when: always
+    expire_in: 1 week
+    paths:
+      - "_scan_build/meson-logs"
+
+.build-asan:
+  script:
+    - meson setup ${MESON_EXTRA_FLAGS} -Db_sanitize=address -Db_lundef=false --prefix /usr _asan_build .
+    - meson compile -C _asan_build
+    - meson test -C _asan_build
+  artifacts:
+    name: "json-glib-asan-${CI_COMMIT_REF_NAME}"
+    when: always
+    expire_in: 1 week
+    paths:
+      - "_asan_build/meson-logs"
+
 .fedora-build:
   image: fedora:39
   before_script:
@@ -112,6 +136,57 @@ fedora-latest-x86_64:
     MESON_VERSION: "1.2.0"
     MESON_EXTRA_FLAGS: "--buildtype=debug --default-library=both -Dwerror=true -Dglib:werror=false -Dintrospection=enabled -Ddocumentation=disabled"
 
+static-scan:
+  extends:
+    - .fedora-build
+    - .build-scan
+  stage: analysis
+  needs: []
+  variables:
+    FEDORA_DEPS:
+      clang
+      clang-analyzer
+      gettext
+      git
+      glib2-devel
+      ninja-build
+      python3
+      python3-docutils
+      python3-pip
+      python3-wheel
+      redhat-rpm-config
+    MESON_VERSION: "1.2.0"
+    MESON_EXTRA_FLAGS: "--buildtype=debug -Dintrospection=disabled -Ddocumentation=disabled"
+    CC: clang
+  allow_failure: true
+ 
+# Run tests with the address sanitizer. We need to turn off introspection,
+# since it is incompatible with asan
+asan-debug-build:
+  extends:
+    - .fedora-build
+    - .build-asan
+  tags: [ asan ]
+  stage: analysis
+  needs: []
+  variables:
+    FEDORA_DEPS:
+      clang
+      gettext
+      git
+      glib2-devel
+      libasan
+      ninja-build
+      python3
+      python3-docutils
+      python3-pip
+      python3-wheel
+      redhat-rpm-config
+    MESON_VERSION: "1.2.0"
+    MESON_EXTRA_FLAGS: "--buildtype=debug -Dintrospection=disabled -Ddocumentation=disabled"
+    CC: clang
+  allow_failure: true
+
 reference:
   stage: docs
   needs: []

doc/meson.build

@@ -48,7 +48,7 @@ if get_option('man') and rst2man.found()
   endforeach
 endif
 
-if build_doc
+if build_doc and gidocgen.found()
   json_docdir = json_datadir / 'doc'
 
   toml_conf = configuration_data()