[libdazzle/alatiera/bst-ci] Add initial CI

[Jordan Petridis <jpetridis src gnome org>]

commit ad85d46f666288b610759cae0a14843a3af8dfee
Author: Jordan Petridis <jpetridis gnome org>
Date:   Fri Sep 28 08:34:50 2018 +0300

    Add initial CI

 .gitlab-ci.yml | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..4138af4
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,50 @@
+stages:
+  - "build"
+
+variables:
+  # Store all the bst stuff under the "${CI_PROJECT_DIR}" directory.
+  # Note that GitLab CI will only cache stuff inside the "${CI_PROJECT_DIR}" folder.
+  XDG_CACHE_HOME: "${CI_PROJECT_DIR}/cache"
+  GET_SOURCES_ATTEMPTS: 3
+  BST: "bst --config build.conf --log-file logs/build.log --colors"
+  BST_SHA: '301a393cb6499b3f869d74827a9e8dc61b97d00e' #  1.1.7
+
+bst:
+  image: "buildstream/buildstream-fedora:master-113-499df6a5"
+  stage: "build"
+  before_script:
+    # Remove any installed buildstream binary
+    - pip3 uninstall -y buildstream
+
+    # Use specific version of BuildStream
+    - git clone https://gitlab.com/BuildStream/buildstream.git
+    - git -C buildstream/ checkout $BST_SHA
+    - pip3 install buildstream/
+
+    # Clone the GNOME moduleset
+    - git clone https://gitlab.gnome.org/GNOME/gnome-build-meta.git
+
+    # Ensure the log directory exists
+    - mkdir -p logs
+  script:
+    - cd gnome-build-meta/
+    - bst workspace open -f core-deps/libdazzle.bst ../
+    - bst build --track-all core-deps/libdazzle.bst
+  after_script:
+    - bst workspace close core-deps/libdazzle.bst
+
+  # Store all the downloaded git and ostree repos in the cache.
+  # This saves us fetching them on every build
+  cache:
+    key: "bst"
+    paths:
+      - "${XDG_CACHE_HOME}/buildstream/sources/"
+
+  # Store artifacts so we can inspect build failures
+  artifacts:
+    when: "always"
+    paths:
+      - "logs"
+      - "project.refs"
+
+