1 files changed, 17 insertions, 1 deletions
diff --git a/scripts/common.bash b/scripts/common.bash
index 20bcb04..cfa04c9 100644
--- a/scripts/common.bash
+++ b/scripts/common.bash
@@ -1,7 +1,23 @@
-#!/bin/env bash
+#!/usr/bin/env bash
 
+# shellcheck disable=2120
 function _panic() {
 	local message=$1
 	echo >&2 "$message"
 	exit 1
 }
+
+function _md5() {
+	local path=$1
+	md5sum "$path" | cut -d' ' -f1
+}
+
+function pushd() {
+	# shellcheck disable=2119
+	command pushd "$@" >/dev/null || _panic
+}
+
+function popd() {
+	# shellcheck disable=2119
+	command popd "$@" >/dev/null || _panic
+}