A build manifest is a YAML file that describes how to perform a build. Here's an
example:

```yaml
image: archlinux
packages:
  - meson
  - scdoc
  - wayland-protocols
  - wlroots-git
  - wayland
  - libxkbcommon
  - cairo
  - pango
  - gdk-pixbuf2
  - pixman
  - libinput
  - xorg-server-xwayland
sources:
  - https://github.com/SirCmpwn/sway
tasks:
  - setup: |
      cd sway
      meson build
  - build: |
      cd sway
      ninja -C build
```

The minimum build manifest has an image and at least one task. The various
properties available are described here:

## image

*string*

Which OS image to build in. A list of available build images can be found on the
[compatibility page](/builds.sr.ht/compatibility.md).

## packages

*list* (of *string*)

A list of packages to install on the image. For image-specific details,
consult the [compatibility list](/builds.sr.ht/compatibility.md)

## repositories

*dictionary* (of *string: string*)

A list of extra repositories to enable with the image's package manager. The
specific format varies by base image, [consult the compatibility
page](/builds.sr.ht/compatibility.md) for details.

## sources

*list* (of *string*)

A list of git repositories to clone into the home directory of the build
user in the build environment.

## tasks

*list* (of *string*)

A list of scripts to execute in the build environment. These scripts are run
with the following preamble:

```sh
#!/usr/bin/env bash
. ~/.buildenv
set -x
set -e
```

~/.buildenv contains environment variables specified by the `environment`
directive.

Task names must use only lowercase alphanumeric characters or underscores
and must be <=128 characters in length. Tasks are executed in the order
specified.

Each task is run in a separate login session, so if you modify the groups of the
`build` user they will be effective starting from the subsequent task.

## triggers

*list* (of *trigger*)

A list of triggers to execute post-build, which can be used to send emails
or do other post-build tasks.

See also: [Build triggers](triggers.md)

## environment

*dictionary* (of *string: string* OR *string: list*)

A list of key/value pairs for options to set in the build environment via
`~/.buildenv`.

Since the value will be parsed twice, once as YAML and once by `bash`,
string literals containing spaces must be 'doubly quoted':

```yaml
environment:
  GIT_SSH_COMMAND: '"ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"'
```

## secrets

*list* (of *string*)

List of secret UUIDs to be added to the guest during the build. See also:
[secrets](/builds.sr.ht#secrets).