Drone has integrated support for matrix builds. Drone executes a separate build task for each combination in the matrix, allowing you to build and test a single commit against multiple configurations.

Example matrix definition:

matrix:
  GO_VERSION:
    - 1.4
    - 1.3
  REDIS_VERSION:
    - 2.6
    - 2.8
    - 3.0

Example matrix definition containing only specific combinations:

matrix:
  include:
    - GO_VERSION: 1.4
      REDIS_VERSION: 2.8
    - GO_VERSION: 1.5
      REDIS_VERSION: 2.8
    - GO_VERSION: 1.6
      REDIS_VERSION: 3.0

Interpolation

Matrix variables are interpolated in the yaml using the ${VARIABLE} syntax, before the yaml is parsed. This is an example yaml file before interpolating matrix parameters:

pipeline:
  build:
    image: golang:${GO_VERSION}
    commands:
      - go get
      - go build
      - go test

services:
  database:
    image: ${DATABASE}

matrix:
  GO_VERSION:
    - 1.4
    - 1.3
  DATABASE:
    - mysql:5.5
    - mysql:6.5
    - mariadb:10.1

Example Yaml file after injecting the matrix parameters:

pipeline:
  build:
-   image: golang:${GO_VERSION}
+   image: golang:1.4
    commands:
      - go get
      - go build
      - go test
+   environment:
+     - GO_VERSION=1.4
+     - DATABASE=mysql:5.5

services:
  database:
-   image: ${DATABASE}
+   image: mysql:5.5

Examples

Example matrix build based on Docker image tag:

pipeline:
  build:
    image: golang:${TAG}
    commands:
      - go build
      - go test

matrix:
  TAG:
    - 1.7
    - 1.8
    - latest

Example matrix build based on Docker image:

pipeline:
  build:
    image: ${IMAGE}
    commands:
      - go build
      - go test

matrix:
  IMAGE:
    - golang:1.7
    - golang:1.8
    - golang:latest

Questions?

We are always happy to help with questions you might have. Search our documentation or check out answers to common questions. You can also post questions or comments to our community forum.