The following variables are available for use for both starlark & Jsonnet templates:

Build

Must be prefixed with ‘build.’

Jsonnet example usage:

local event = std.extVar("build.event");
local action = std.extVar("build.action");

Starlark example usage:

{
 "event": ctx.build.event,
 "action": ctx.build.action
}

Variable	Description
event	Provides the event that triggered the pipeline execution.
action	Provides the action that triggered the pipeline execution. Use this value to differentiate between the pull request being opened vs synchronized.
environment	Provides the target deployment environment for the running build.
link	Provides a link the git commit or object in the source control management system.
branch	Provides the target branch for the push or pull request. This value may be empty for tag events.
source	Provides the source branch for the pull request. This value may be empty for certain source control management providers.
before	Provides the git commit sha before the patch is applied. This may be used in conjunction with the after commit sha to create a diff.
after	Provides the git commit sha after the patch is applied. This may be used in conjunction with the before commit sha to create a diff.
target	Provides the target branch for the push or pull request. This value may be empty for tag events.
ref	Provides the target branch for the push or pull request. This value may be empty for tag events.
commit	Provides the git commit sha after the patch is applied. This may be used in conjunction with the before commit sha to create a diff.
title	Provides the title of the commit. The full first line of the message.
message	Provides the commit message for the current running build.
source_repo	Provides the source repository name of the pull request.
author_login	Provides the commit author username for the current running build. This is the username from source control management system (e.g. GitHub username).
author_name	Provides the commit author name for the current running build. Note this is a user-defined value and may be empty or inaccurate.
author_email	Provides the commit email address for the current running build. Note this is a user-defined value and may be empty or inaccurate.
author_avatar	Provides the commit author avatar for the current running build. This is the avatar from source control management system (e.g. GitHub).
sender	Provides the event sender’s login name

Repo

Must be prefixed with ‘repo.’

Jsonnet example usage:

local uid = std.extVar("repo.uid");
local name = std.extVar("repo.name");

Starlark example usage:

{
 "uid": ctx.repo.uid,
 "name": ctx.repo.name
}

Yaml example usage:

- uid: {{ .repo.uid }}

Variable	Description
uid	Provides the UUID of the repository.
name	Provides the full repository name for the current running build.
namespace	Provides the repository namespace for the current running build. The namespace is an alias for the source control management account that owns the repository.
slug	Provides the user or organisation and the repository name
git_http_url	Provides the git+http url that should be used to clone the repository.
git_ssh_url	Provides the git+ssh url that should be used to clone the repository.
link	Provides the repository link for the current running build.
branch	Provides the default repository branch for the current running build.
config	Provides the configuration path for the repository.
private	Provides a boolean flag that indicates whether or not the repository is private or public.
visibility	Provides the repository visibility level for the current running build.
active	Provides a boolean flag that indicates whether or not the repository is active.
trusted	Provides a boolean flag that indicates whether or not the repository is trusted.
protected	Provides a boolean flag that indicates whether or not the repository is protected.
ignore_forks	Provides a boolean flag that indicates whether or not to ignore forks.
ignore_pull_requests	Provides a boolean flag that indicates whether or not to ignore pull requests.