Merge pull request #5480 from dokku/5112-procfile-cleanup

Cleanup zero'd out processes when a Procfile omitting those process types is set

docs/appendices/0.29.0-migration-guide.md

@@ -8,4 +8,5 @@
 
 ## Removals
 
-- The `DOKKU_WAIT_TO_RETIRE` environment variable has been migrated to a `checks` property named `wait-to-retire` and will be ignored if set as an environment variable.
+- The `DOKKU_WAIT_TO_RETIRE` environment variable has been migrated to a `checks` property named `wait-to-retire` and will be ignored if set as an environment variable.
+- The `Procfile` is now extracted when source code is extracted for a build and not from the built image. Users can specify alternative paths via the `procfile-path` property of the `ps` plugin. See the [process management documentation](/docs/processes/process-management.md#changing-the-procfile-location) for more information on how to configure the `Procfile` path for your application.

docs/development/plugin-triggers.md

@@ -1783,21 +1783,6 @@ APP="$1";
 curl "https://dokku.me/starting/${APP}" || true
 ```
 
-### `procfile-extract`
-
-- Description: Extracts a Procfile from a given image to a path
-- Invoked by: `internally`
-- Arguments: `$APP $IMAGE`
-- Example:
-
-```shell
-#!/usr/bin/env bash
-
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
-
-# TODO
-```
-
 ### `procfile-get-command`
 
 - Description: Fetches the command for a specific process type
@@ -1813,21 +1798,6 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 # TODO
 ```
 
-### `procfile-remove`
-
-- Description: Removes the extracted Procfile
-- Invoked by: `internally`
-- Arguments: `$APP`
-- Example:
-
-```shell
-#!/usr/bin/env bash
-
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
-
-# TODO
-```
-
 ### `proxy-build-config`
 
 - Description: Builds the proxy implementation configuration for a given app

docs/networking/proxies/nginx.md

@@ -289,7 +289,7 @@ dokku nginx:validate-config node-js-app --clean
 
 Dokku uses a templating library by the name of [sigil](https://github.com/gliderlabs/sigil) to generate nginx configuration for each app. This may be overriden by committing the [default configuration template](https://github.com/dokku/dokku/blob/master/plugins/nginx-vhosts/templates/nginx.conf.sigil) to a file named `nginx.conf.sigil` in the root of the app repository.
 
-By default, the `nginx.conf.sigil` path is pulled from the root of the app source code repository. To change the path from which the `nginx.conf.sigil` is extracted, the `nginx-conf-sigil-path` property can be modified via `nginx:set`.
+When deploying a monorepo, it may be desirable to specify the specific path of the `nginx.conf.sigil` file to use for a given app. This can be done via the `nginx:set` command. If a value is specified and that file does not exist in the app's build directory, Dokku will continue the build process as if the repository has no `nginx.conf.sigil`.
 
 ```shell
 dokku nginx:set node-js-app nginx-conf-sigil-path dokku/nginx.conf.sigil