override the curl-sys crate

to include alexcrichton/curl-rust#137

But only for the targets affected by cross-rs#4

closes cross-rs#4

ci/script.sh

@@ -11,24 +11,15 @@ main() {
 
     cargo install --path .
 
-    # NOTE(case) japaric/cross#4
-    case $TARGET in
-        mips-unknown-linux-gnu | \
-            mips64-unknown-linux-gnuabi64 | \
-            powerpc64-unknown-linux-gnu)
-        ;;
-        *)
-            td=$(mktemp -d)
+    td=$(mktemp -d)
 
-            git clone --depth 1 https://github.com/rust-lang/cargo $td
+    git clone --depth 1 https://github.com/rust-lang/cargo $td
 
-            pushd $td
-            cross build --target $TARGET
-            popd
+    pushd $td
+    cross build --target $TARGET
+    popd
 
-            rm -rf $td
-            ;;
-    esac
+    rm -rf $td
 
     # NOTE(s390x) japaric/cross#3
     # NOTE(x86_64-musl) can't test compiler-builtins because that crate needs

docker/mips-unknown-linux-gnu/Dockerfile

@@ -1,5 +1,8 @@
 FROM ubuntu:16.04
 
+COPY override.sh /
+RUN bash /override.sh curl-sys 0.3.6
+
 COPY qemu.sh /
 RUN bash /qemu.sh 2.8.0 mips
 

docker/mips64-unknown-linux-gnuabi64/Dockerfile

@@ -1,5 +1,8 @@
 FROM ubuntu:16.04
 
+COPY override.sh /
+RUN bash /override.sh curl-sys 0.3.6
+
 COPY qemu.sh /
 RUN bash /qemu.sh 2.8.0 mips64
 

docker/override.sh

@@ -0,0 +1,36 @@
+set -ex
+
+main() {
+    local dependencies=(
+        ca-certificates
+        curl
+    )
+
+    apt-get update
+
+    apt-get install --no-install-recommends -y ${dependencies[@]}
+
+    mkdir -p /overrides /.cargo
+    echo "paths = [" > /.cargo/config
+
+    local pkg= vers=
+    while [ $# -gt 1 ]; do
+        pkg=$1
+        vers=$2
+        shift 2
+
+        mkdir /overrides/$pkg
+        curl -L https://japaric.github.io/cross/$pkg-v$vers.tar.gz | \
+            tar -C /overrides/$pkg -xz
+
+        echo "\"/overrides/$pkg\"," >> /.cargo/config
+    done
+
+    echo "]" >> /.cargo/config
+
+    apt-get purge --auto-remove -y ${dependencies[@]}
+
+    rm $0
+}
+
+main "${@}"

docker/powerpc64-unknown-linux-gnu/Dockerfile

@@ -1,5 +1,8 @@
 FROM ubuntu:16.04
 
+COPY override.sh /
+RUN bash /override.sh curl-sys 0.3.6
+
 COPY qemu.sh /
 RUN bash /qemu.sh 2.7.1 ppc64