Added build scripts for multiple platforms (#47)

build-all.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env sh
+build_function() {
+    rustup update
+    cargo install cross
+
+
+    cross build --release --target x86_64-unknown-linux-gnu
+    cross build --release --target x86_64-unknown-linux-musl
+    cross build --release --target x86_64-unknown-freebsd
+    cross build --release --target aarch64-unknown-linux-gnu
+    cross build --release --target aarch64-unknown-linux-musl
+    cross build --release --target x86_64-pc-windows-gnu
+}
+
+package_function() {
+    tar -czvf build/topgrade-${ans}-x86_64-linux-gnu.tar.gz target/x86_64-unknown-linux-gnu/release/topgrade-rs
+    tar -czvf build/topgrade-${ans}-x86_64-linux-musl.tar.gz target/x86_64-unknown-linux-musl/release/topgrade-rs
+    tar -czvf build/topgrade-${ans}-x86_64-freebsd.tar.gz target/x86_64-unknown-freebsd/release/topgrade-rs
+    tar -czvf build/topgrade-${ans}-aarch64-linux-gnu.tar.gz target/aarch64-unknown-linux-gnu/release/topgrade-rs
+    tar -czvf build/topgrade-${ans}-aarch64-linux-musl.tar.gz target/aarch64-unknown-linux-musl/release/topgrade-rs
+    tar -czvf build/topgrade-${ans}-x86_64-windows.tar.gz target/x86_64-pc-windows-gnu/release/topgrade-rs.exe
+
+}
+
+while true; do
+
+echo "You should always have a look on scripts you download from the internet."
+read -p "Do you still want to proceed? (y/n) " yn
+
+echo -n "Input version number: "
+read ans
+mkdir build
+
+case $yn in
+	y ) build_function
+        package_function
+		break;;
+	n ) echo exiting...;
+		exit;;
+	* ) echo invalid response;;
+esac
+
+done