#!/bin/bash
# Run `cargo test` on an installed Debian crate, e.g. in an autopkgtest.
#
# Requires dev-dependencies to be installed. If you give extra flags such as
# "--all-features", then these features' dependencies must also be installed.

set -e

pkg="$1"
ver="$2"

if [ -z "$pkg" -o -z "$ver" ]; then
	echo >&2 "Usage: $0 <crate> <version> [<extra test flags, e.g. --all-features>]"
	exit 2
fi
shift 2

pkgdir="/usr/share/cargo/registry/${pkg}-${ver}"
if [ ! -d "$pkgdir" ]; then
	echo >&2 "crate directory not found: $pkgdir"
	exit 1
fi
cd "$pkgdir"

rundir=$(mktemp -d)
# https://stackoverflow.com/a/14812383 inside "trap" avoids running handler twice
trap 'excode=$?; rm -rf "'"$rundir"'"; trap - EXIT' EXIT HUP INT QUIT PIPE TERM

# set envvars necessary for cargo-debian-wrapper

export DEB_CARGO_CRATE="${pkg}_${ver}"
export CARGO_HOME="$rundir/debian/cargo_home"
mkdir -p "$CARGO_HOME"
mkdir -p "$rundir/registry"

. <(dpkg-buildflags --export)
. <(dpkg-architecture -s)
RUST_TYPE="$(rustc --version --verbose | sed -ne 's/^host: //p')"
export DEB_HOST_RUST_TYPE="$RUST_TYPE"
export DEB_BUILD_RUST_TYPE="$RUST_TYPE"
export DEB_TARGET_RUST_TYPE="$RUST_TYPE"

export CARGO_TARGET_DIR="$rundir/target"
export PATH="/usr/share/cargo/bin:$PATH"

# run the test!

cargo prepare-debian "$rundir/registry" --link-from-system
cargo test "$@"