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goreleaser/www/docs/customization/universalbinaries.md
Carlos Alexandro Becker a23c9df16b
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# macOS Universal Binaries
GoReleaser can create _macOS Universal Binaries_ - also known as _Fat Binaries_.
Those binaries are in a special format that contains both `arm64` and `amd64`
executables in a single file.
Here's how to use it:
```yaml title=".goreleaser.yaml"
universal_binaries:
- # ID of the resulting universal binary.
#
# Default: the project name.
id: foo
# IDs to use to filter the built binaries.
#
# Notice that you shouldn't include different apps' IDs here.
# This field is usually only required if you are using CGO.
#
# Default: the value of the id field.
ids:
- build1
- build2
# Universal binary name.
#
# You will want to change this if you have multiple builds!
#
# Default: '{{ .ProjectName }}'.
# Templates: allowed.
name_template: "{{.ProjectName}}_{{.Version}}"
# Whether to remove the previous single-arch binaries from the artifact list.
# If left as false, your end release might have as much as three
# archives for macOS: 'amd64', 'arm64' and 'all'.
replace: true
# Set the modified timestamp on the output binary, typically
# you would do this to ensure a build was reproducible.
# Pass an empty string to skip modifying the output.
#
# Templates: allowed.
mod_timestamp: "{{ .CommitTimestamp }}"
# Hooks can be used to customize the final binary,
# for example, to run generators.
#
# Templates: allowed.
hooks:
pre: rice embed-go
post: ./script.sh {{ .Path }}
```
<!-- md:templates -->
For more info about hooks, see the [build section](./builds.md#build-hooks).
The minimal configuration for most setups would look like this:
```yaml title=".goreleaser.yaml"
universal_binaries:
- replace: true
```
That config will join your default build macOS binaries into a Universal Binary,
removing the single-arch binaries from the artifact list.
From there, the `Arch` template variable for this file will be `all`.
You can use the Go template engine to remove it if you'd like.
!!! warning
You'll want to change `name_template` for each `id` you add in universal
binaries, otherwise they'll have the same name.
Example:
```yaml
universal_binaries:
- id: foo
name_template: bin1
- id: bar
name_template: bin2
```
## Naming templates
Most fields that support [templates](templates.md) will also
support the following build details:
<!-- to format the tables, use: https://tabletomarkdown.com/format-markdown-table/ -->
| Key | Description |
| ------- | --------------------------------- |
| .Os | `GOOS`, always `darwin` |
| .Arch | `GOARCH`, always `all` |
| .Arm | `GOARM`, always empty |
| .Ext | Extension, always empty |
| .Target | Build target, always `darwin_all` |
| .Path | The binary path |
| .Name | The binary name |
!!! tip
Notice that `.Path` and `.Name` will only be available after they are
evaluated, so they are mostly only useful in the `post` hooks.