This method updates an existing global build command template. Because the command is shared, changes apply to every project it is linked to.

**Tip**: You can explore and test this endpoint interactively using our [OpenAPI documentation](https://api.deployhq.com/docs).

## URL

```
/global_build_commands/:identifier
```

## HTTP Method

```
PATCH
```

## Supported Parameters

- `description` - A description of the build command
- `command` - The command to run during the build pipeline
- `halt_on_error` - Whether the deployment should stop if the command fails
- `template_name` - The name of a predefined build command template to base this command on
- `watch_files` - A comma-separated list of file patterns that should trigger this command

## Example cURL Request

```bash
curl -H "Content-type: application/json" \
-H "Accept: application/json" \
--user your-email@example.com:your-api-key \
-X PATCH \
-d '{
  "build_command": {
    "command": "npm ci --production"
  }
}' \
https://test.deployhq.com/global_build_commands/df8966fe-e161-4517-98e2-24f79102dd62
```

## Example Response

```json
{
  "identifier": "df8966fe-e161-4517-98e2-24f79102dd62",
  "description": "Install dependencies",
  "command": "npm ci --production",
  "halt_on_error": true,
  "source": "global"
}
```

## Error Responses

If the update is invalid, the endpoint responds with `422 Unprocessable Entity` and a list of the validation errors:

```json
{
  "errors": [
    "Command cannot contain sudo"
  ]
}
```

Other responses you may receive:

- `401 Unauthorized` - the email address or API key is missing or incorrect
- `403 Forbidden` - your user is not an account administrator
- `404 Not Found` - no global build command matches the supplied identifier