The path can be relative or absolute under $GITHUB_WORKSPACE

* README.md:
    * action.yml:
    * adrs/0153-checkout-v2.md:

README.md

@@ -82,7 +82,7 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
     # Default: true
     persist-credentials: ''
 
-    # Relative path under $GITHUB_WORKSPACE to place the repository
+    # Relative or absolute path under $GITHUB_WORKSPACE to place the repository
     path: ''
 
     # Whether to execute `git clean -ffdx && git reset --hard HEAD` before fetching
@@ -160,6 +160,18 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
     path: my-tools
 ```
 
+## Checkout repo with a environment based path (side by side)
+
+```yaml
+env:
+  main_path: ${{ github.workspace }}/main
+steps:
+- name: Checkout
+  uses: actions/checkout@v2
+  with:
+    path: ${{ env.main_path }}
+```
+
 ## Checkout multiple repos (nested)
 
 ```yaml

action.yml

@@ -49,7 +49,7 @@ inputs:
     description: 'Whether to configure the token or SSH key with the local git config'
     default: true
   path:
-    description: 'Relative path under $GITHUB_WORKSPACE to place the repository'
+    description: 'Relative or absolute path under $GITHUB_WORKSPACE to place the repository'
   clean:
     description: 'Whether to execute `git clean -ffdx && git reset --hard HEAD` before fetching'
     default: true

adrs/0153-checkout-v2.md

@@ -65,7 +65,7 @@ We want to take this opportunity to make behavioral changes, from v1. This docum
     description: 'Whether to configure the token or SSH key with the local git config'
     default: true
   path:
-    description: 'Relative path under $GITHUB_WORKSPACE to place the repository'
+    description: 'Relative or absolute path under $GITHUB_WORKSPACE to place the repository'
   clean:
     description: 'Whether to execute `git clean -ffdx && git reset --hard HEAD` before fetching'
     default: true
@@ -287,4 +287,4 @@ Note:
 - Update samples to consume `actions/checkout@v2`
 - Job containers now require git in the PATH for checkout, otherwise fallback to REST API
 - Minimum git version 2.18
-- Update problem matcher logic regarding source file verification (runner)
+- Update problem matcher logic regarding source file verification (runner)