ci: build docs using meson

To avoid having to inflate the image here even further, let's just add
what we need to the the normal x86 Alpine build image, and use that.

Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11494>

.gitlab-ci/container/alpine/x86_64_build.sh

@@ -29,11 +29,13 @@ DEPS=(
     git
     gettext
     glslang
+    graphviz
     linux-headers
     llvm16-static
     llvm16-dev
     meson
     mold
+    musl-dev
     expat-dev
     elfutils-dev
     libdrm-dev
@@ -42,9 +44,11 @@ DEPS=(
     libpciaccess-dev
     zlib-dev
     python3-dev
+    py3-clang
     py3-cparser
     py3-mako
     py3-packaging
+    py3-pip
     py3-ply
     vulkan-headers
     spirv-tools-dev
@@ -55,6 +59,8 @@ DEPS=(
 
 apk --no-cache add "${DEPS[@]}" "${EPHEMERAL[@]}"
 
+pip3 install --break-system-packages sphinx===5.1.1 hawkmoth===0.16.0
+
 . .gitlab-ci/container/build-llvm-spirv.sh
 
 . .gitlab-ci/container/build-libclc.sh

.gitlab-ci/container/gitlab-ci.yml

@@ -346,6 +346,12 @@ alpine/x86_64_build:
     - .alpine/x86_64_build-base
   variables:
     MESA_IMAGE_TAG: &alpine-x86_64_build ${ALPINE_X86_64_BUILD_TAG}
+  rules:
+    - !reference [pages, rules]
+    - !reference [test-docs, rules]
+    - !reference [test-docs-mr, rules]
+    - !reference [linkcheck-docs, rules]
+    - !reference [.container, rules]
 
 .use-alpine/x86_64_build:
   extends:

.gitlab-ci/image-tags.yml

@@ -32,7 +32,7 @@ variables:
    DEBIAN_TEST_VK_TAG: "20240613-piglit-fd"
    KERNEL_ROOTFS_TAG: "20240613-piglit-fd"
 
-   ALPINE_X86_64_BUILD_TAG: "20240612-mold"
+   ALPINE_X86_64_BUILD_TAG: "20240620-sphinx"
    ALPINE_X86_64_LAVA_SSH_TAG: "20240401-wlproto"
    FEDORA_X86_64_BUILD_TAG: "20240612-mold"
    KERNEL_TAG: "v6.6.21-mesa-f8ea"