fix: add solana-bpf-sdk-install command to permit users to easily update their bpf-sdk

web3.js/bin/bpf-sdk-install.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+set -e
+
+installDir=$1
+if [[ -z $installDir ]]; then
+  installDir="$(cd "$(dirname "$0")"/..; pwd)"
+fi
+
+channel=$("$(dirname "$0")"/testnet-default-channel.js)
+if [[ -n $2 ]]; then
+  channel=$2
+fi
+[[ $channel = edge || $channel = beta ]] || {
+  echo "Error: Invalid channel: $channel"
+  exit 1
+}
+
+echo "Installing $channel BPF SDK into $installDir"
+
+set -x
+cd "$installDir/"
+curl -L  --retry 5 --retry-delay 2 -o bpf-sdk.tar.bz2 \
+  http://solana-sdk.s3.amazonaws.com/"$channel"/bpf-sdk.tar.bz2
+rm -rf bpf-sdk
+mkdir -p bpf-sdk
+tar jxf bpf-sdk.tar.bz2
+rm -f bpf-sdk.tar.bz2
+
+cat bpf-sdk/version.txt

web3.js/bin/localnet.sh

@@ -1,18 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
-channel=$(
-  cd "$(dirname "$0")";
-  node -p '
-    let p = [
-      "../lib/node_modules/@solana/web3.js/package.json",
-      "../@solana/web3.js/package.json",
-      "../package.json"
-    ].find(require("fs").existsSync);
-    if (!p) throw new Error("Unable to locate solana-web3.js directory");
-    require(p)["testnetDefaultChannel"]
-  '
-)
+channel=$("$(dirname "$0")"/testnet-default-channel.js)
 
 usage() {
   exitcode=0

web3.js/bin/testnet-default-channel.js

@@ -0,0 +1,10 @@
+#!/usr/bin/env node
+
+let p = [
+  __dirname + '/../lib/node_modules/@solana/web3.js/package.json',
+  __dirname + '/../@solana/web3.js/package.json',
+  __dirname + '/../package.json'
+].find(require('fs').existsSync);
+if (!p) throw new Error('Unable to locate solana-web3.js directory');
+
+console.log(require(p)['testnetDefaultChannel']);