1 files changed, 33 insertions, 0 deletions
diff --git a/src/development/lib.sh b/src/development/lib.sh
new file mode 100644
index 0000000..e345bd6
--- /dev/null
+++ b/src/development/lib.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+assert_arg() {
+	if [ -z "$1" ]; then
+		printf 'Missing %s.\n\n' "$2" >&2
+		cat <<-'EOF'
+			usage >&2
+			exit 2
+		EOF
+	fi
+}
+
+uuid() {
+	od -xN20 /dev/urandom |
+		head -n1 |
+		awk '{OFS="-"; print $2$3,$4,$5,$6,$7$8$9}'
+}
+
+tmpname() {
+	printf '%s/uuid-tmpname with spaces.%s' "${TMPDIR:-/tmp}" "$(uuid)"
+}
+
+mkstemp() {
+	name="$(tmpname)"
+	touch -- "$name"
+	printf '%s' "$name"
+}
+
+mkdtemp() {
+	name="$(tmpname)"
+	mkdir -- "$name"
+	printf '%s' "$name"
+}