eval(functions): pass automatic and fail early and good

contrib/evaluation/unsandboxed/functions.sh

@@ -1,3 +1,4 @@
+set -euxo pipefail
 export BUILDXYZ_RELEASE_VARIANT="release"
 export BUILDXYZ_BINARY="./target/$BUILDXYZ_RELEASE_VARIANT/buildxyz"
 # Improve the performance of the evaluation
@@ -7,6 +8,10 @@ export RUSTC_BOOTSTRAP=1
 
 export buildxyz_global_flags=()
 
+if [[ -v AUTOMATIC ]]; then
+  buildxyz_global_flags+=(--automatic)
+fi
+
 # Debugging infrastructure
 export STRACE=""
 export STRACE_EXTRA_FLAGS=""
@@ -24,7 +29,6 @@ pypi_buildxyz() {
   package="$1"
   PREFIX_DIR=$(mktemp -d)
   echo "buildxyz $package in pip prefix $PREFIX_DIR"
-  echo $STRACE $BUILDXYZ_BINARY --record-to "examples/python/$package.toml" "pip install --use-feature=no-binary-enable-wheel-cache --prefix $PREFIX_DIR --no-binary :all: --no-cache-dir $package"
   $STRACE $BUILDXYZ_BINARY "${buildxyz_global_flags[@]}" --record-to "examples/python/$package.toml" "pip install --use-feature=no-binary-enable-wheel-cache --prefix $PREFIX_DIR --no-binary :all: --no-cache-dir $package"
 }