ci: Install cargo-hack in Cirrus CI

.cirrus.yml

@@ -22,6 +22,7 @@ aarch64_linux_test_task:
     - lscpu
     - rustup toolchain add nightly --no-self-update && rustup default nightly
     # - apt-get -o Acquire::Retries=10 -qq update && apt-get -o Acquire::Retries=10 -o Dpkg::Use-Pty=0 install -y --no-install-recommends moreutils
+    - curl --proto '=https' --tlsv1.2 -fsSL "https://github.com/taiki-e/cargo-hack/releases/latest/download/cargo-hack-${TARGET}.tar.gz" | tar xzf - -C "${HOME}/.cargo/bin"
   test_script:
     - set -CeEuxo pipefail
     - ./tools/test.sh -vv
@@ -44,6 +45,7 @@ aarch64_linux_valgrind_task:
     - set -CeEuxo pipefail
     - rustup toolchain add nightly --no-self-update && rustup default nightly
     - apt-get -o Acquire::Retries=10 -qq update && apt-get -o Acquire::Retries=10 -o Dpkg::Use-Pty=0 install -y --no-install-recommends valgrind # moreutils
+    - curl --proto '=https' --tlsv1.2 -fsSL "https://github.com/taiki-e/cargo-hack/releases/latest/download/cargo-hack-${TARGET}.tar.gz" | tar xzf - -C "${HOME}/.cargo/bin"
   test_script:
     - set -CeEuxo pipefail
     - ./tools/test.sh valgrind -vv

tools/test.sh

@@ -186,7 +186,10 @@ if [[ -n "${target}" ]]; then
 fi
 if type -P cargo-hack >/dev/null; then
     args+=(--features "${test_features}" --ignore-unknown-features)
+elif [[ -n "${CI:-}" ]]; then
+    bail "cargo-hack is required"
 else
+    echo "warning: cargo-hack is required to run full tests"
     args+=(--features "${test_features}")
 fi
 case "${cmd}" in