updated the runner to utilize caching

scripts/install_odin.sh

@@ -18,10 +18,19 @@ case "$ARCH" in
     ;;
 esac
 
-curl -fL -o /tmp/odin.tar.gz \
-  "https://github.com/odin-lang/Odin/releases/download/${VERSION}/odin-linux-${OBJ_ARCH}-${VERSION}.tar.gz"
-mkdir -p /tmp/odin
-tar -xzf /tmp/odin.tar.gz -C /tmp/odin --strip-components=1
+# If a prior job restored the install from cache, reuse it instead of
+# re-downloading. The extracted Odin binary already on PATH is authoritative;
+# otherwise fetch the version (plus the raylib workaround) fresh.
+if [ -x /tmp/odin/odin ]; then
+  echo "Odin ${VERSION} found in cache (host arch: ${ARCH}, release arch: ${OBJ_ARCH})"
+  BIN_DIR=/tmp/odin
+else
+  curl -fL -o /tmp/odin.tar.gz \
+    "https://github.com/odin-lang/Odin/releases/download/${VERSION}/odin-linux-${OBJ_ARCH}-${VERSION}.tar.gz"
+  mkdir -p /tmp/odin
+  tar -xzf /tmp/odin.tar.gz -C /tmp/odin --strip-components=1
+  BIN_DIR=/tmp/odin
+fi
 
 # Work around an Odin binding bug: for ODIN_ARCH == .arm64 the vendored
 # raylib references `vendor/raylib/linux-arm/libraylib.a`, but the release
@@ -33,7 +42,7 @@ if [ "${OBJ_ARCH}" = "arm64" ] \
 fi
 
 if [ -n "${GITHUB_PATH:-}" ]; then
-  echo "/tmp/odin" >> "$GITHUB_PATH"
+  echo "${BIN_DIR}" >> "$GITHUB_PATH"
 fi
 
-echo "Installed Odin ${VERSION} (host arch: ${ARCH}, release arch: ${OBJ_ARCH})"
+echo "Odin ${VERSION} ready (host arch: ${ARCH}, release arch: ${OBJ_ARCH})"