test: tell Subplot-generated test program where the binaries are

Previously, we blindly assumed that Cargo puts binaries in
`target/debug` in the source tree. That is the default, but the user
can change it. Now we get the Cargo target directory by parsing the
output of "cargo metadata" and pass in the path to the test program
via an environment variable.

Also, reformat shell script.

Sponsored-by: author

1 files changed, 18 insertions, 22 deletions

diff --git a/check b/check
index 8ff40c1..7d5098c 100755
--- a/check
+++ b/check
@@ -5,28 +5,24 @@
 set -eu
 
 hideok=chronic
-if [ "$#" -gt 0 ]
-then
-    case "$1" in
+if [ "$#" -gt 0 ]; then
+	case "$1" in
 	verbose | -v | --verbose)
-	    hideok=
-	    shift
-	    ;;
-    esac
+		hideok=
+		shift
+		;;
+	esac
 fi
 
-require_cmd()
-{
-    if ! command -v "$1" > /dev/null
-    then
-        echo "Need to have $1 installed, but can't find it" 1>&2
-        return 1
-    fi
+require_cmd() {
+	if ! command -v "$1" >/dev/null; then
+		echo "Need to have $1 installed, but can't find it" 1>&2
+		return 1
+	fi
 }
 
-got_cargo_cmd()
-{
-    cargo "$1" --help > /dev/null
+got_cargo_cmd() {
+	cargo "$1" --help >/dev/null
 }
 
 require_cmd rustc
@@ -43,7 +39,7 @@ require_cmd pdflatex
 # daemonize installation location changed from Debian 10 to 11.
 require_cmd daemonize || require_cmd /usr/sbin/daemonize
 
-got_cargo_cmd clippy && cargo  clippy --all-targets -q
+got_cargo_cmd clippy && cargo clippy --all-targets -q
 $hideok cargo build --all-targets
 got_cargo_cmd fmt && $hideok cargo fmt -- --check
 $hideok cargo test
@@ -51,13 +47,13 @@ $hideok cargo test
 subplot docgen obnam.md -o obnam.html
 subplot docgen obnam.md -o obnam.pdf
 
+target="$(cargo metadata --format-version=1 | python3 -c 'import sys, json; o = json.load(sys.stdin); print(o["target_directory"])')"
 subplot codegen obnam.md -o test.py
 rm -f test.log
-if [ "$(id -un)" = root ]
-then
-    echo Not running tests as root.
+if [ "$(id -un)" = root ]; then
+	echo Not running tests as root.
 else
-    $hideok python3 test.py --log test.log "$@"
+	$hideok python3 test.py --log test.log --env "CARGO_TARGET_DIR=$target" "$@"
 fi
 
 echo "Everything seems to be in order."