docs: add environment variables inline

docs/configuration.md

@@ -149,6 +149,8 @@ You can override the Cache directory by setting the `POETRY_CACHE_DIR` environme
 
 **Type**: `string`
 
+**Environment Variable**: `POETRY_CACHE_DIR`
+
 The path to the cache directory used by Poetry.
 
 Defaults to one of the following directories:
@@ -163,6 +165,8 @@ Defaults to one of the following directories:
 
 **Default**: `false`
 
+**Environment Variable**: `POETRY_EXPERIMENTAL_SYSTEM_GIT_CLIENT`
+
 *Introduced in 1.2.0*
 
 Use system git client backend for git related tasks.
@@ -177,6 +181,8 @@ If you encounter any problems with it, set to `true` to use the system git backe
 
 **Default**: `number_of_cores + 4`
 
+**Environment Variable**: `POETRY_INSTALLER_MAX_WORKERS`
+
 *Introduced in 1.2.0*
 
 Set the maximum number of workers while using the parallel installer.
@@ -196,6 +202,8 @@ This configuration is ignored when `installer.parallel` is set to `false`.
 
 **Default**: `false`
 
+**Environment Variable**: `POETRY_INSTALLER_NO_BINARY`
+
 *Introduced in 1.2.0*
 
 When set this configuration allows users to configure package distribution format policy for all or
@@ -245,6 +253,8 @@ across all your projects if incorrectly set.
 
 **Default**: `true`
 
+**Environment Variable**: `POETRY_INSTALLER_PARALLEL`
+
 *Introduced in 1.1.4*
 
 Use parallel execution when using the new (`>=1.1.0`) installer.
@@ -255,6 +265,8 @@ Use parallel execution when using the new (`>=1.1.0`) installer.
 
 **Default**: `true`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_CREATE`
+
 Create a new virtual environment if one doesn't already exist.
 
 If set to `false`, Poetry will not create a new virtual environment. If it detects a virtual environment
@@ -281,6 +293,8 @@ might contain additional Python packages as well.
 
 **Default**: `None`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_IN_PROJECT`
+
 Create the virtualenv inside the project's root directory.
 
 If not set explicitly, `poetry` by default will create virtual environment under
@@ -297,6 +311,8 @@ If set to `false`, `poetry` will ignore any existing `.venv` directory.
 
 **Default**: `false`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_OPTIONS_ALWAYS_COPY`
+
 *Introduced in 1.2.0*
 
 If set to `true` the `--always-copy` parameter is passed to `virtualenv` on creation of the virtual environment, so that
@@ -308,6 +324,8 @@ all needed files are copied into it instead of symlinked.
 
 **Default**: `false`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_OPTIONS_NO_PIP`
+
 *Introduced in 1.2.0*
 
 If set to `true` the `--no-pip` parameter is passed to `virtualenv` on creation of the virtual environment. This means
@@ -328,6 +346,8 @@ packages. This is desirable for production environments.
 
 **Default**: `false`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_OPTIONS_NO_SETUPTOOLS`
+
 *Introduced in 1.2.0*
 
 If set to `true` the `--no-setuptools` parameter is passed to `virtualenv` on creation of the virtual environment. This
@@ -345,6 +365,8 @@ available within a virtual environment. This can cause some features in these to
 
 **Default**: `false`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_OPTIONS_SYSTEM_SITE_PACKAGES`
+
 Give the virtual environment access to the system site-packages directory.
 Applies on virtualenv creation.
 
@@ -354,6 +376,8 @@ Applies on virtualenv creation.
 
 **Default**: `{cache-dir}/virtualenvs`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_PATH`
+
 Directory where virtual environments will be created.
 
 ### `virtualenvs.prefer-active-python` (experimental)
@@ -362,6 +386,8 @@ Directory where virtual environments will be created.
 
 **Default**: `false`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_PREFER_ACTIVE_PYTHON`
+
 *Introduced in 1.2.0*
 
 Use currently activated Python version to create a new virtual environment.
@@ -373,6 +399,8 @@ If set to `false`, Python version used during Poetry installation is used.
 
 **Default**: `{project_name}-py{python_version}`
 
+**Environment Variable**: `POETRY_VIRTUALENVS_PROMPT`
+
 *Introduced in 1.2.0*
 
 Format string defining the prompt to be displayed when the virtual environment is activated.
@@ -382,12 +410,16 @@ The variables `project_name` and `python_version` are available for formatting.
 
 **Type**: `string`
 
+**Environment Variable**: `POETRY_REPOSITORIES_<NAME>`
+
 Set a new alternative repository. See [Repositories]({{< relref "repositories" >}}) for more information.
 
 ### `http-basic.<name>`:
 
 **Type**: `(string, string)`
 
+**Environment Variable**: `POETRY_HTTP_BASIC_<NAME>`
+
 Set repository credentials (`username` and `password`) for `<name>`.
 See [Repositories - Configuring credentials]({{< relref "repositories#configuring-credentials" >}})
 for more information.
@@ -396,6 +428,8 @@ for more information.
 
 **Type**: `string`
 
+**Environment Variable**: `POETRY_PYPI_TOKEN_<NAME>`
+
 Set repository credentials (using an API token) for `<name>`.
 See [Repositories - Configuring credentials]({{< relref "repositories#configuring-credentials" >}})
 for more information.
@@ -404,6 +438,8 @@ for more information.
 
 **Type**: `string | boolean`
 
+**Environment Variable**: `POETRY_CERTIFICATES_<NAME>_CERT`
+
 Set custom certificate authority for repository `<name>`.
 See [Repositories - Configuring credentials - Custom certificate authority]({{< relref "repositories#custom-certificate-authority-and-mutual-tls-authentication" >}})
 for more information.
@@ -415,6 +451,8 @@ repository.
 
 **Type**: `string`
 
+**Environment Variable**: `POETRY_CERTIFICATES_<NAME>_CLIENT_CERT`
+
 Set client certificate for repository `<name>`.
 See [Repositories - Configuring credentials - Custom certificate authority]({{< relref "repositories#custom-certificate-authority-and-mutual-tls-authentication" >}})
 for more information.