From 6e6f446eb029fe152c09ef78ad50e7bd1beff204 Mon Sep 17 00:00:00 2001
From: Matthew Knight <mattnite@proton.me>
Date: Thu, 5 Mar 2026 14:30:27 -0800
Subject: [PATCH] Install curl

---
 actions/setup-cairn/action.yml | 27 ++++++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/actions/setup-cairn/action.yml b/actions/setup-cairn/action.yml
index 4ae2c42..1fbc55f 100644
--- a/actions/setup-cairn/action.yml
+++ b/actions/setup-cairn/action.yml
@@ -23,15 +23,36 @@ runs:
 
         CACHE_DIR="${RUNNER_TOOL_CACHE:-/tmp/cairn-tool-cache}"
         TOOL_DIR="${CACHE_DIR}/cairn/${CAIRN_VERSION}/x64"
+        CAIRN_URL="${{ github.server_url }}/api/packages/${{ github.repository_owner }}/generic/cairn/${CAIRN_VERSION}/cairn-x86_64-linux"
+
+        download_cairn() {
+          if command -v curl >/dev/null 2>&1; then
+            curl -sfL "${CAIRN_URL}" -o "${TOOL_DIR}/cairn"
+            return 0
+          fi
+
+          if command -v wget >/dev/null 2>&1; then
+            wget -qO "${TOOL_DIR}/cairn" "${CAIRN_URL}"
+            return 0
+          fi
+
+          if command -v apt-get >/dev/null 2>&1; then
+            apt-get update -qq
+            apt-get install -y -qq curl >/dev/null 2>&1
+            curl -sfL "${CAIRN_URL}" -o "${TOOL_DIR}/cairn"
+            return 0
+          fi
+
+          echo "ERROR: no supported downloader found (curl/wget/apt-get)"
+          return 1
+        }
 
         if [ -f "${TOOL_DIR}/cairn" ] && [ -f "${TOOL_DIR}/.complete" ]; then
           echo "Cairn CLI ${CAIRN_VERSION} found in tool cache"
         else
           echo "Downloading Cairn CLI ${CAIRN_VERSION}..."
           mkdir -p "${TOOL_DIR}"
-          curl -sfL \
-            "${{ github.server_url }}/api/packages/${{ github.repository_owner }}/generic/cairn/${CAIRN_VERSION}/cairn-x86_64-linux" \
-            -o "${TOOL_DIR}/cairn"
+          download_cairn
           chmod +x "${TOOL_DIR}/cairn"
           touch "${TOOL_DIR}/.complete"
           echo "Cairn CLI ${CAIRN_VERSION} installed"