Add shell script checks

Makefile

@@ -11,7 +11,9 @@ The following make targets are available:
   clean  Cleanup build directories.
   dist   Build distribution files.
   help   Show this text.
+  push   Push to all configured Git remotes.
   pypi   Upload distribution files to PyPI.
+  schk   Shell script check.
   stest  Run sandboxed Python tests (disables network tests).
   test   Run all Python tests and generate coverage report.
 
@@ -43,3 +45,9 @@ stest:
 
 test:
 	env NETWORK_TESTS=1 $(unittest) coverage
+
+push:
+	for _r in $(shell git remote); do git push $$_r; done; unset _r
+
+schk:
+	shellcheck -x contrib/*.sh

contrib/package.sh

@@ -10,7 +10,7 @@ set -euo pipefail
 
 function usage() {
 	local bn
-	bn="$(basename $0)"
+	bn="$(basename "$0")"
 	echo "Usage: ${bn} {clean | dist | pypi}" >&2
 	echo "       ${bn} setver {version}" >&2
 	exit 1
@@ -41,11 +41,11 @@ arg="${1}"
 shift
 case "${arg}" in
 	clean)
-		do_${arg}
+		do_"${arg}"
 		;;
 	dist|setver|pypi)
 		. .venv/bin/activate
-		do_${arg} "$@"
+		do_"${arg}" "$@"
 		;;
 	*)
 		usage

contrib/unittest.sh

@@ -25,7 +25,7 @@ CONF='tests/tests.conf'
 sed -i'' -e "s,^db_url.*,db_url = sqlite:///${DB}," $CONF
 
 function usage() {
-	echo "Usage: $(basename $0) [coverage]" >&2
+	echo "Usage: $(basename "$0") [coverage]" >&2
 	exit 1
 }