From 07dee18d6bca05358d43239af232d2fbeab2dd67 Mon Sep 17 00:00:00 2001
From: Anagh Kumar Baranwal <6824881+darthShadow@users.noreply.github.com>
Date: Tue, 17 Nov 2020 22:33:12 +0530
Subject: [PATCH] cmount: Add optional `brew` tag to throw an error when using
 mount in the binaries installed via Homebrew - Fixes #4775

Signed-off-by: Anagh Kumar Baranwal <6824881+darthShadow@users.noreply.github.com>
---
 cmd/cmount/mount_brew.go        | 32 ++++++++++++++++++++++++++++++++
 cmd/cmount/mount_unsupported.go |  2 +-
 cmd/mount/mount_unsupported.go  |  2 +-
 3 files changed, 34 insertions(+), 2 deletions(-)
 create mode 100644 cmd/cmount/mount_brew.go

diff --git a/cmd/cmount/mount_brew.go b/cmd/cmount/mount_brew.go
new file mode 100644
index 000000000..df553487a
--- /dev/null
+++ b/cmd/cmount/mount_brew.go
@@ -0,0 +1,32 @@
+// Build for macos with the brew tag to handle the absence
+// of fuse and print an appropriate error message
+
+// +build brew
+// +build darwin
+
+package cmount
+
+import (
+	"github.com/pkg/errors"
+	"github.com/rclone/rclone/cmd/mountlib"
+	"github.com/rclone/rclone/vfs"
+)
+
+func init() {
+	name := "mount"
+	cmd := mountlib.NewMountCommand(name, false, mount)
+	cmd.Aliases = append(cmd.Aliases, "cmount")
+	mountlib.AddRc("cmount", mount)
+}
+
+// mount the file system
+//
+// The mount point will be ready when this returns.
+//
+// returns an error, and an error channel for the serve process to
+// report an error when fusermount is called.
+func mount(_ *vfs.VFS, _ string, _ *mountlib.Options) (<-chan error, func() error, error) {
+	return nil, nil, errors.New("mount is not supported on MacOS when installed via Homebrew. " +
+		"Please install the binaries available at https://rclone." +
+		"org/downloads/ instead if you want to use the mount command")
+}
diff --git a/cmd/cmount/mount_unsupported.go b/cmd/cmount/mount_unsupported.go
index 57d820e22..dbd73618f 100644
--- a/cmd/cmount/mount_unsupported.go
+++ b/cmd/cmount/mount_unsupported.go
@@ -1,6 +1,6 @@
 // Build for cmount for unsupported platforms to stop go complaining
 // about "no buildable Go source files "
 
-// +build !linux,!darwin,!freebsd,!windows !cgo !cmount
+// +build !linux,!darwin,!freebsd,!windows !brew !cgo !cmount
 
 package cmount
diff --git a/cmd/mount/mount_unsupported.go b/cmd/mount/mount_unsupported.go
index bff6cd670..e4284148d 100644
--- a/cmd/mount/mount_unsupported.go
+++ b/cmd/mount/mount_unsupported.go
@@ -1,7 +1,7 @@
 // Build for mount for unsupported platforms to stop go complaining
 // about "no buildable Go source files "
 
-// Invert the build constraint: linux,go1.13 darwin,go1.13 freebsd,go1.13
+// Invert the build constraint: linux,go1.13 freebsd,go1.13
 //
 // !((linux&&go1.13) || (freebsd&&go1.13))
 // == !(linux&&go1.13) && !(freebsd&&go1.13))