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feat: add ability to manage stacks on an app or global level

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The previous lever for manipulating this was the DOKKU_IMAGE environment variable. While this is all well and good, it only works for CNB and is yet another `DOKKU_*` environment variable that need not exist.

While this does not add support for manipulating the CNB stack just yet, the groundwork is set for the future.

Closes #4306
This commit is contained in:
Jose Diaz-Gonzalez
2021-01-17 23:20:16 -05:00
parent 4c74e0dfba
commit bad90b2b1d
11 changed files with 134 additions and 8 deletions
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docs/configuration/environment-variables.md
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@@ -78,7 +78,7 @@ The following config variables have special meanings and can be set in a variety
| Name | Default | How to modify | Description |
| ------------------------------ | ------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------- |
| `DOKKU_ROOT` | `~dokku` | `/etc/environment` | The root directory where dokku will store application repositories, as well as certain configuration files. |
| `DOKKU_IMAGE` | `gliderlabs/herokuish` | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*` | The default image to use when building herokuish containers. |
| `DOKKU_IMAGE` | `gliderlabs/herokuish` | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*` | The default image to use when building herokuish containers. Deprecated in favor of using `buildpacks:stack-set` |
| `DOKKU_LIB_ROOT` | `/var/lib/dokku` | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*` | The directory where plugins, certain data, and general configuration is stored. |
| `PLUGIN_PATH` | `$DOKKU_LIB_ROOT/plugins"` | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*` | The top-level directory where plugins are stored. |
| `PLUGIN_AVAILABLE_PATH` | `$PLUGIN_PATH/available"` | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*` | The directory that holds all available plugins, including core. |