test.sh

#!/usr/bin/env bash
# shellcheck disable=SC2086

set -e

# testpkg tests a given `pkg` using the package's `Makefile` or directly using `go test` and `go vet`.
#
#   @param:  pkg           name of the package
#   @env:    GOTEST_ARGS   extra test arguments for `go test` or `make test GOTEST_ARGS=GOTEST_ARGS`
#
testpkg() {
    set -e
    pkg="$1"
    echo -n "testing '$pkg', "
    if test -e "$pkg/Makefile"; then
        echo "found '$pkg/Makefile'"
        run make -C "$pkg" test
    else
        if test -e "$pkg/go.mod"
        then tests="./...";       echo "found go.mod for package '$pkg', entering dir '$pkg'"; cd "$pkg"
        else tests="./$pkg/...";  echo "found subpackage '$pkg', running subpackage tests";
        fi

        prefix=".cache/$pkg"
        mkdir -p "$(dirname "$prefix")"
        test -z "$GOTEST_ARGS" || echo "using GOTEST_ARGS=$GOTEST_ARGS as additional go test arguments"
        touch "$prefix.log"
        run go test -race $GOTEST_ARGS $tests 2>&1 | tee "$prefix.log"
        run go vet $tests
    fi

    if test -e "$pkg/go.mod" && ! test -f "$pkg/LICENSE"; then
        echo "ERROR: standalone package $pkg needs a hard-copied LICENSE file"
        return 1
    fi
}

# run prints a command before running it, similar to how `make` echos commands.
run() { echo "$*"; "$@"; }

for pkg in "$@"; do testpkg "$pkg"; done