From 21a5693e300204ad6e07de227694f0e8e2db2ed8 Mon Sep 17 00:00:00 2001
From: "Martin R. Smith" <martin.smith@durham.ac.uk>
Date: Mon, 26 Apr 2021 19:17:16 +0100
Subject: [PATCH] Add flexible R env example

Use variables to specify location
---
 examples.md | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/examples.md b/examples.md
index f3d6788..6296b0b 100644
--- a/examples.md
+++ b/examples.md
@@ -412,7 +412,20 @@ Locations:
  - macOS: `~/Library/Application Support/renv`
  - Windows: `%LOCALAPPDATA%/renv`
 
-### Simple example
+
+### Using variables to specify location
+
+(Appropriate for single or multiple operating systems.)
+
+```yaml
+ - uses: actions/cache@v2
+   with:
+     path: ${{ env.R_LIBS_USER }}
+     key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
+     restore-keys: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-
+```
+
+### Simple example with hard-coded path
 ```yaml
 - uses: actions/cache@v2
   with:
@@ -424,7 +437,7 @@ Locations:
 
 Replace `~/.local/share/renv` with the correct `path` if not using Ubuntu.
 
-### Multiple OS's in a workflow
+### Multiple OSs in a workflow
 
 ```yaml
 - uses: actions/cache@v2