BUG: Always start with clean CUDA_PATH when building cache

Author: carterbox

.github/actions/fetch_ctk/action.yml

@@ -51,7 +51,8 @@ runs:
       shell: bash --noprofile --norc -xeuo pipefail {0}
       run: |
         CUDA_PATH="./cuda_toolkit"
-        mkdir -p $CUDA_PATH
+        rm -f $CUDA_PATH
+        mkdir $CUDA_PATH
 
         # The binary archives (redist) are guaranteed to be updated as part of the release posting.
         CTK_BASE_URL="https://developer.download.nvidia.com/compute/cuda/redist/"

.github/actions/fetch_ctk/guess_latest.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+# URL to search
+URL="https://developer.download.nvidia.com/compute/cuda/redist/"
+
+# Fetch the directory listing and extract the latest version number
+get_latest_version() {
+    # Get the HTML content of the page
+    local html_content=$(wget -q -O - "$URL")
+
+    # Extract links matching the pattern redistrib_?.?.?.json
+    local files=$(echo "$html_content" | grep -oP 'redistrib_[0-9]+\.[0-9]+\.[0-9]+\.json' | cut -d'"' -f2)
+
+    # If files were found, extract the version numbers and find the latest
+    if [ -n "$files" ]; then
+        # Extract just the version numbers using regex
+        local versions=$(echo "$files" | grep -oP 'redistrib_\K[0-9]+\.[0-9]+\.[0-9]+(?=\.json)')
+
+        # Sort the versions and get the latest
+        local latest_version=$(echo "$versions" | sort -V | tail -n 1)
+        echo "$latest_version"
+    else
+        echo "No files matching the pattern were found."
+        return 1
+    fi
+}
+
+# Call the function and store the result
+latest_version=$(get_latest_version)