Fetch and install SPL programs by default

fetch-spl.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+#
+# Fetches the latest SPL programs and produces the solana-genesis command-line
+# arguments needed to install them
+#
+
+set -e
+
+fetch_program() {
+  declare name=$1
+  declare version=$2
+  declare address=$3
+
+  declare so=spl_$name-$version.so
+
+  genesis_args+=(--bpf-program "$address" "$so")
+
+  if [[ -r $so ]]; then
+    return
+  fi
+
+  if [[ -r ~/.cache/solana-spl/$so ]]; then
+    cp ~/.cache/solana-spl/"$so" "$so"
+  else
+    echo "Downloading $name $version"
+    (
+      set -x
+      curl -L --retry 5 --retry-delay 2 --retry-connrefused \
+        -o "$so" \
+        "https://github.com/solana-labs/solana-program-library/releases/download/$name-v$version/spl_$name.so"
+    )
+
+    mkdir -p ~/.cache/solana-spl
+    cp "$so" ~/.cache/solana-spl/"$so"
+  fi
+
+}
+
+fetch_program token 1.0.0 TokenSVp5gheXUvJ6jGWGeCsgPKgnE3YgdGKRVCMY9o
+fetch_program memo  1.0.0 Memo1UhkJRfHyvLMcVucJwxXeuD728EqVDDwQDxFMNo
+
+echo "${genesis_args[@]}" > spl-genesis-args.sh
+
+echo
+echo "Available SPL programs:"
+ls -l spl_*.so
+
+echo
+echo "solana-genesis command-line arguments (spl-genesis-args.sh):"
+cat spl-genesis-args.sh