.gitlab-ci: Use true --prefix

We have to use the final location of IGT for --prefix as some of the
binaries use that for asset lookup (e.g. register definitions that end
up in $PREFIX/share/).

To install it under a local directory during the early build steps it's
better to use $DESTDIR.

Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>

.gitlab-ci.yml

@@ -63,14 +63,14 @@ build-containers:build-fedora:
 build:tests-fedora:
   stage: build
   script:
-    - meson --prefix=`pwd`/opt-igt $MESON_OPTIONS build
+    - meson --prefix=/opt/igt $MESON_OPTIONS build
     - ninja -C build
-    - ninja -C build install
+    - DESTDIR="$PWD/installdir" ninja -C build install
     - ninja -C build igt-gpu-tools-doc
   artifacts:
     paths:
       - build
-      - opt-igt
+      - installdir
 
 build:tests-fedora-no-libunwind:
   stage: build

Dockerfile

@@ -2,7 +2,7 @@ ARG CI_COMMIT_SHA
 ARG CI_REGISTRY_IMAGE
 FROM $CI_REGISTRY_IMAGE/build-fedora:commit-$CI_COMMIT_SHA
 
-COPY opt-igt /opt/igt
+COPY installdir/opt/igt /opt/igt
 COPY .gitlab-ci/docker-help.sh /usr/local/bin/docker-help.sh
 
 ENV PATH="/opt/igt/bin:${PATH}"