Migrated miscellaneous Bash utilities into the hack/lib library

Signed-off-by: Steve Kuznetsov <[email protected]>

hack/lib/util/misc.sh

@@ -129,3 +129,39 @@ function os::util::find-go-binary() {
   done
 }
 readonly -f os::util::find-go-binary
+
+# os::util::sed attempts to make our Bash scripts agnostic to the platform
+# on which they run `sed` by glossing over a discrepancy in flag use in GNU.
+#
+# Globals:
+#  None
+# Arguments:
+#  - all: arguments to pass to `sed -i`
+# Return:
+#  None
+function os::util::sed() {
+	if LANG=C sed --help 2>&1 | grep -q "GNU sed"; then
+		sed -i'' "$@"
+	else
+		sed -i '' "$@"
+	fi
+}
+readonly -f os::util::sed
+
+# os::util::base64decode attempts to make our Bash scripts agnostic to the platform
+# on which they run `base64decode` by glossing over a discrepancy in flag use in GNU.
+#
+# Globals:
+#  None
+# Arguments:
+#  - all: arguments to pass to `base64decode`
+# Return:
+#  None
+function os::util::base64decode() {
+	if [[ "$(go env GOHOSTOS)" == "darwin" ]]; then
+		base64 -D "$@"
+	else
+		base64 -d "$@"
+	fi
+}
+readonly -f os::util::base64decode

hack/util.sh

@@ -566,24 +566,6 @@ function os::util::host_platform() {
 }
 readonly -f os::util::host_platform
 
-function os::util::sed() {
-	if LANG=C sed --help 2>&1 | grep -qs "GNU sed"; then
-		sed -i'' "$@"
-	else
-		sed -i '' "$@"
-	fi
-}
-readonly -f os::util::sed
-
-function os::util::base64decode() {
-	if [[ "$(go env GOHOSTOS)" == "darwin" ]]; then
-		base64 -D $@
-	else
-		base64 -d $@
-	fi
-}
-readonly -f os::util::base64decode
-
 function os::util::get_object_assert() {
 	local object=$1
 	local request=$2