CI: turn BUILDDIR and PREFIX into CI variables

Change BUILDDIR and PREFIX from exported shell variables into CI
variables. This way they can be used in CI configuration, e.g.
artifacts.

The main reason for this change is that it makes it possible to use
these variables in after_script, which is not possible with shell
variables as the values do not carry over there.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

.gitlab-ci.yml

@@ -37,6 +37,9 @@ container_prep:
     - .fdo.distribution-image@debian
   timeout: 5m
   stage: build
+  variables:
+    BUILDDIR: $CI_PROJECT_DIR/build-weston-$CI_JOB_NAME
+    PREFIX: $CI_PROJECT_DIR/prefix-weston-$CI_JOB_NAME
   before_script:
   - git clone --depth=1 https://gitlab.freedesktop.org/wayland/wayland-protocols
   - export WAYLAND_PROTOCOLS_DIR="$(pwd)/prefix-wayland-protocols"
@@ -50,9 +53,6 @@ container_prep:
   - make install
   - cd ../../
   - export XDG_RUNTIME_DIR="$(mktemp -p $(pwd) -d xdg-runtime-XXXXXX)"
-  - export BUILD_ID="weston-$CI_JOB_NAME"
-  - export PREFIX="$(pwd)/prefix-$BUILD_ID"
-  - export BUILDDIR="$(pwd)/build-$BUILD_ID"
   - export TESTS_RES_PATH="$BUILDDIR/tests-res.txt"
   - mkdir "$BUILDDIR" "$PREFIX"
 
@@ -76,12 +76,12 @@ container_prep:
     name: weston-$CI_COMMIT_SHA
     when: always
     paths:
-    - build-*/*.png
-    - build-*/meson-logs
-    - build-*/weston-virtme
-    - prefix-*
+    - $BUILDDIR/*.png
+    - $BUILDDIR/meson-logs
+    - $BUILDDIR/weston-virtme
+    - $PREFIX
     reports:
-      junit: build-*/meson-logs/testlog.junit.xml
+      junit: $BUILDDIR/meson-logs/testlog.junit.xml
 
 .build-native-meson-no-test:
   extends: .build-native
@@ -98,8 +98,8 @@ container_prep:
     name: weston-$CI_COMMIT_SHA
     when: always
     paths:
-    - build-*/meson-logs
-    - prefix-*
+    - $BUILDDIR/meson-logs
+    - $PREFIX
 
 build-native-meson-default-options:
   variables:
@@ -111,12 +111,12 @@ build-native-meson-default-options:
       -Dlauncher-libseat=true
   extends: .build-native-meson
   after_script:
-  - ninja -C build-* coverage-html
-  - ninja -C build-* coverage-xml
-  - sed -i -e 's/\/build-weston-build-native-meson-default-options//' -e 's/\"..\//\"/' build-*/meson-logs/coverage.xml
+  - ninja -C "$BUILDDIR" coverage-html
+  - ninja -C "$BUILDDIR" coverage-xml
+  - sed -i -e 's/\/build-weston-build-native-meson-default-options//' -e 's/\"..\//\"/' "$BUILDDIR/meson-logs/coverage.xml"
   artifacts:
     reports:
-      cobertura: build-*/meson-logs/coverage.xml
+      cobertura: $BUILDDIR/meson-logs/coverage.xml
 
 build-docs:
   variables: