From 537880e634737119f39efba8f63b72a7faa3edf4 Mon Sep 17 00:00:00 2001
From: Oliver Gugger <gugger@gmail.com>
Date: Thu, 15 Jul 2021 10:45:22 +0200
Subject: [PATCH] healthcheck: exclude unsupported syscalls from JS builds

Because the health check uses OS specific syscalls for determining the
available space on a disk that aren't available in JS/WASM builds, we
need to make sure we don't reference that code at all. Otherwise we
can't use parts of lnd as a library in projects that are being compiled
down to a WASM binary.
---
 healthcheck/diskcheck.go    |  2 +-
 healthcheck/diskcheck_js.go | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 healthcheck/diskcheck_js.go

diff --git a/healthcheck/diskcheck.go b/healthcheck/diskcheck.go
index 7f30b154..087fc7a7 100644
--- a/healthcheck/diskcheck.go
+++ b/healthcheck/diskcheck.go
@@ -1,4 +1,4 @@
-// +build !windows,!solaris,!netbsd,!openbsd
+// +build !windows,!solaris,!netbsd,!openbsd,!js
 
 package healthcheck
 
diff --git a/healthcheck/diskcheck_js.go b/healthcheck/diskcheck_js.go
new file mode 100644
index 00000000..4a2f4f57
--- /dev/null
+++ b/healthcheck/diskcheck_js.go
@@ -0,0 +1,13 @@
+package healthcheck
+
+// AvailableDiskSpaceRatio returns ratio of available disk space to total
+// capacity.
+func AvailableDiskSpaceRatio(path string) (float64, error) {
+	return 0, fmt.Errorf("disk space check not supported in WebAssembly")
+}
+
+// AvailableDiskSpace returns the available disk space in bytes of the given
+// file system.
+func AvailableDiskSpace(path string) (uint64, error) {
+	return 0, fmt.Errorf("disk space check not supported in WebAssembly")
+}