Trying CI.

ci/install.sh

@@ -0,0 +1,60 @@
+# `install` phase: install stuff needed for the `script` phase
+
+set -ex
+
+. $(dirname $0)/utils.sh
+
+install_c_toolchain() {
+    case $TARGET in
+        aarch64-unknown-linux-gnu)
+            sudo apt-get install -y --no-install-recommends \
+                 gcc-aarch64-linux-gnu libc6-arm64-cross libc6-dev-arm64-cross
+            ;;
+        *)
+            # For other targets, this is handled by addons.apt.packages in .travis.yml
+            ;;
+    esac
+}
+
+install_rustup() {
+    # uninstall the rust toolchain installed by travis, we are going to use rustup
+    sh ~/rust/lib/rustlib/uninstall.sh
+
+    curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain=$TRAVIS_RUST_VERSION
+
+    rustc -V
+    cargo -V
+}
+
+install_standard_crates() {
+    if [ $(host) != "$TARGET" ]; then
+        rustup target add $TARGET
+    fi
+}
+
+configure_cargo() {
+    local prefix=$(gcc_prefix)
+
+    if [ ! -z $prefix ]; then
+        # information about the cross compiler
+        ${prefix}gcc -v
+
+        # tell cargo which linker to use for cross compilation
+        mkdir -p .cargo
+        cat >>.cargo/config <<EOF
+[target.$TARGET]
+linker = "${prefix}gcc"
+EOF
+    fi
+}
+
+main() {
+    install_c_toolchain
+    install_rustup
+    install_standard_crates
+    configure_cargo
+
+    # TODO if you need to install extra stuff add it here
+}
+
+main