Let the CI runner know about builds that this build depends on
This allows us to implement artifacts passing: runner will download artifacts from all prior builds. It will happen automatically, and always, as long as artifacts are enabled.
## The changes:
This MR exposes list of prior builds in CI::API::Builds.
**The API response when asking for builds**
```json
{
"id": 48584,
"ref": "0.1.1",
"tag": true,
"sha": "d63117656af6ff57d99e50cc270f854691f335ad",
"status": "success",
"name": "pages",
"token": "9dd60b4f1a439d1765357446c1084c",
"stage": "test",
"project_id": 479,
"project_name": "test",
"commands": "echo commands",
"repo_url": "http://gitlab-ci-token:token@gitlab.example/group/test.git",
"before_sha": "0000000000000000000000000000000000000000",
"allow_git_fetch": false,
"options": {
"image": "docker:image",
"artifacts": {
"paths": [
"public"
]
},
"cache": {
"paths": [
"vendor"
]
}
},
"timeout": 3600,
"variables": [
{
"key": "CI_BUILD_TAG",
"value": "0.1.1",
"public": true
}
],
"dependencies": {
"builds": [
{
"id": 48584,
"ref": "0.1.1",
"tag": true,
"sha": "d63117656af6ff57d99e50cc270f854691f335ad",
"status": "success",
"name": "build",
"token": "9dd60b4f1a439d1765357446c1084c",
"stage": "build",
"project_id": 479,
"project_name": "test",
"artifacts_file": {
"filename": "artifacts.zip",
"size": 0
}
}
]
}
}
```
## How it will work?
**Example:**
```
build:
type: build
script:
- echo TEST > test_file
artifacts:
untracked: true
rspec:
type: test
script:
- test-my-project
staging:
type: deploy
script:
- scp test_file root@server.com:
```
**The flow:**
1. We run `build`. The `build` creates a file `test_file`. This file gets archived and send us build artifacts.
2. We run `rspec`. The `rspec` downloads build artifacts from `build`. Uses the `test_file`.
3. We run `staging`. The `staging` downloads build artifacts from `build` and `rspec`, but since the `rspec` doesn't have build artifacts we skip that build. Deploys the `test_file`.
This partially implements the https://gitlab.com/gitlab-org/gitlab-ce/issues/3423.
In the next release we will introduce option to configure what artifacts are received.
/cc @grzesiek @DouweM @sytse @rspeicher
See merge request !2437
c19795dff5