ci: Move dist testing to a separate job

Multiple reasons, in particular:

* Doing it in every build & test job duplicates effort, resulting in
  the pipeline taking longer than necessary.
* We cannot limit the number of test processes spawned by meson dist.
* There's little point running tests for dist anyway, we just want to
  make sure we can build & install from the generated tarball.

.gitlab-ci.yml

@@ -97,6 +97,16 @@ mingw-cross-build:
         - meson --cross-file=.gitlab-ci/cross-i686-w64-mingw32.txt -Dglx=false -Dsecure-rpc=false -Dlisten_tcp=true build/
         - ninja -j${FDO_CI_CONCURRENT:-4} -C build/ install
 
+meson-dist:
+    extends: .common-build-and-test
+    artifacts:
+        when: always
+        paths:
+            - build/meson-logs/
+            - build/xserver-*/build/meson-logs/
+    script:
+        - .gitlab-ci/dist.sh
+
 #
 # Verify that commit messages are as expected
 #

.gitlab-ci/build-and-test.sh

@@ -22,8 +22,6 @@ check_piglit_results ()
 
 meson -Dc_args="-fno-common" -Dprefix=/usr -Dxephyr=true -Dwerror=true $MESON_EXTRA_OPTIONS build/
 
-ninja -j${FDO_CI_CONCURRENT:-4} -C build/ dist
-
 export PIGLIT_DIR=/root/piglit XTEST_DIR=/root/xts
 ninja -j${FDO_CI_CONCURRENT:-4} -C build/
 meson test --num-processes ${FDO_CI_CONCURRENT:-4} --print-errorlogs -C build/

.gitlab-ci/dist.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -e
+set -o xtrace
+
+meson build/
+meson dist --no-tests -C build/
+
+cd build
+tar xf meson-dist/xserver-*.tar.xz
+cd xserver-*/
+
+meson -Dc_args="-fno-common" -Dprefix=/usr -Dwerror=true build/
+DESTDIR=$PWD/install/ ninja -j${FDO_CI_CONCURRENT:-4} -C build/ install