woodpecker/doc/build/env.md
2015-07-09 17:01:03 -07:00

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# Variables
The build environment has access to the following environment variables:
* `CI=true`
* `DRONE=true`
* `DRONE_REPO` - repository name for the current build
* `DRONE_BUILD` - build number for the current build
* `DRONE_BRANCH` - branch name for the current build
* `DRONE_COMMIT` - git sha for the current build
* `DRONE_DIR` - working directory for the current build
## Private Variables
Drone also lets you to store sensitive data external to the `.drone.yml` and inject at runtime. You can declare private variables in the repository settings screen. These variables are injected into the `.drone.yml` at runtime using the `$$` notation.
An example `.drone.yml` expecting the `HEROKU_TOKEN` private variable:
```yaml
build:
image: golang
commands:
- go get
- go build
- go test
deploy:
heroku:
app: pied_piper
token: $$HEROKU_TOKEN
```