Add scripts to fetch external third-party dependencies.

Summary:
This downloads, uncompresses, and configures folly and its
dependencies: boost, double-conversion, and glog.

Reviewed By: bestander

Differential Revision: D4434066

fbshipit-source-id: 8f9d18448ef139e450a8c45a64d6a066d731ac8f

ios-cc.sh

@@ -0,0 +1,3 @@
+#!/bin/sh -x
+
+exec "$(xcrun -find -sdk iphoneos cc)" -arch armv7 -isysroot "$(xcrun -sdk iphoneos --show-sdk-path)" "$@"

ios-install-third-party.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+#boostdir="`node ./node_modules/boost-lib/bin/boost-lib download -V 1.57`"
+#cd "$boostdir"
+#./bootstrap.sh
+#./b2 headers
+
+set -e
+
+cachedir="$HOME/.rncache"
+mkdir -p "$cachedir"
+
+function fetch_and_unpack () {
+    file=$1
+    url=$2
+    cmd=$3
+
+    if [ ! -f "$cachedir/$file" ]; then
+        (cd "$cachedir"; curl -J -L -O "$url")
+    fi
+
+    dir=$(basename "$file" .tar.gz)
+    if [ ! -d "third-party/$dir" ]; then
+        (cd third-party;
+         echo Unpacking "$cachedir/$file"...
+         tar zxf "$cachedir/$file"
+
+         cd "$dir"
+         eval "${cmd:-true}")
+    fi
+}
+
+mkdir -p third-party
+
+SCRIPTDIR=$(pwd)/$(dirname "$0")
+
+fetch_and_unpack glog-0.3.4.tar.gz https://github.com/google/glog/archive/v0.3.4.tar.gz "CC='$SCRIPTDIR'/ios-cc.sh CXX='$SCRIPTDIR'/ios-cc.sh ./configure --host arm-apple-darwin"
+fetch_and_unpack double-conversion-1.1.1.tar.gz https://github.com/google/double-conversion/archive/v1.1.1.tar.gz
+fetch_and_unpack boost_1_57_0.tar.gz https://github.com/react-native-community/boost-for-react-native/releases/download/v1.57.0-1/boost_1_57_0.tar.gz
+fetch_and_unpack folly-2016.09.26.00.tar.gz https://github.com/facebook/folly/archive/v2016.09.26.00.tar.gz

package.json

@@ -88,6 +88,7 @@
     "cli.js",
     "flow",
     "init.sh",
+    "ios-install-third-party.sh",
     "jest-preset.json",
     "jest",
     "lib",