Build configuration file schema

A build config file contains instructions for Cloud Build to perform tasks based on your specifications. For example, your build config file can contain instructions to build, package, and push Docker images.

This page explains the schema of the Cloud Build configuration file. For instructions on creating and using a build config file, see Creating a basic build config file.

Structure of a build config file

Build config files are modeled using the Cloud Build API's Build resource.

You can write the build config file using the YAML or the JSON syntax. If you submit build requests using third-party http tools such as curl, use the JSON syntax.

A build config file has the following structure:

YAML 

steps:
- name: string
  args: [string, string, ...]
  env: [string, string, ...]
  allowFailure: boolean
  allowExitCodes: [string (int64 format), string (int64 format), ...]
  dir: string
  id: string
  waitFor: [string, string, ...]
  entrypoint: string
  secretEnv: string
  volumes: object(Volume)
  timeout: string (Duration format)
  script: string
  automapSubstitutions: boolean
  results: object(Results)
- name: string
  ...
- name: string
  ...
timeout: string (Duration format)
queueTtl: string (Duration format)
logsBucket: string
options:
 env: [string, string, ...]
 secretEnv: string
 volumes: object(Volume)
 sourceProvenanceHash: enum(HashType)
 machineType: enum(MachineType)
 diskSizeGb: string (int64 format)
 substitutionOption: enum(SubstitutionOption)
 dynamicSubstitutions: boolean
 automapSubstitutions: boolean
 logStreamingOption: enum(LogStreamingOption)
 logging: enum(LoggingMode)
 defaultLogsBucketBehavior: enum(DefaultLogsBucketBehavior)
 pool: object(PoolOption)
 pubsubTopic: string
 requestedVerifyOption: enum(RequestedVerifyOption)
substitutions: map (key: string, value: string)
tags: [string, string, ...]
serviceAccount: string
secrets: object(Secret)
availableSecrets: object(Secrets)
artifacts: object(Artifacts)
  goModules: [object(GoModules), ...]
  mavenArtifacts: [object(MavenArtifact), ...]
  pythonPackages: [object(PythonPackage), ...]
  npmPackages: [object(npmPackage), ...]
images:
- [string, string, ...]

JSON 

{
    "steps": [
    {
        "name": "string",
        "args": [
            "string",
            "string",
            "..."
        ],
        "env": [
            "string",
            "string",
            "..."
        ],
        "allowFailure": "boolean",
        "allowExitCodes: [
            "string (int64 format)",
            "string (int64 format)",
            "..."
        ],
        "dir": "string",
        "id": "string",
        "waitFor": [
            "string",
            "string",
            "..."
        ],
        "entrypoint": "string",
        "secretEnv": "string",
        "volumes": "object(Volume)",
        "timeout": "string (Duration format)",
        "script" : "string",
        "automapSubstitutions" : "boolean",
        "results": "object(Results)"
    },
    {
        "name": "string"
        ...
    },
    {
        "name": "string"
        ...
    }
    ],
    "timeout": "string (Duration format)",
    "queueTtl": "string (Duration format)",
    "logsBucket": "string",
    "options": {
        "sourceProvenanceHash