build.sh script to help people with the build from source

build.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+echo "This script will ask some questions and then build gossip for you."
+echo
+
+RUSTV=$(rustc --version >/dev/null 2>&1)
+if [ $? -ne 0 ] ; then
+    echo "Please install rust. One easy way is shown here: https://rustup.rs/"
+    exit 1
+fi
+
+FFMPEG=$(ffmpeg --help >/dev/null 2>&1)
+if [ $? -eq 0 ] ; then
+    FEATURE_FFMPEG=",video-ffmpeg"
+else
+    FEATURE_FFMPEG=""
+fi
+
+while true; do
+    read -p "Do you need to use locally installed certificates (usually no)? (y/n) " yn
+    case $yn in
+        [Yy]* ) FEATURE_TLS="rustls-tls-native"; break;;
+        [Nn]* ) FEATURE_TLS="rustls-tls"; break;;
+        * ) echo "Please answer y or n.";;
+    esac
+done
+
+while true; do
+    read -p "Are you having compile issues with TLS crates (including rustls, ring, request)? " yn
+    case $yn in
+        [Yy]* ) FEATURE_TLS="native-tls"; break;;
+        [Nn]* ) break;;
+        * ) echo "Please answer y or n.";;
+    esac
+done
+
+while true; do
+    read -p "Do you want to enable Chinese-Japanese-Korean font characters, which makes a large binary? (y/n) " yn
+    case $yn in
+        [Yy]* ) FEATURE_CJK=",lang-cjk"; break;;
+        [Nn]* ) FEATURE_CJK=""; break;;
+        * ) echo "Please answer y or n.";;
+    esac
+done
+
+FEATURES=$FEATURE_TLS$FEATURE_CJK$FEATURE_FFMPEG
+
+echo "Building with FEATURES=$FEATURES"
+
+export RUSTFLAGS="-C target-cpu=native --cfg tokio_unstable"
+cargo build --release --features=$FEATURES
+strip ./target/release/gossip
+
+echo
+echo "The gossip binary is at ./target/release/gossip and can be moved anywhere you want."