Merge branch '12-fix-btrfs-path' into rubocop

2 files changed, 15 insertions, 2 deletions

diff --git a/lib/byteback/backup_directory.rb b/lib/byteback/backup_directory.rb
index 89b0ae9..a39cf84 100644
--- a/lib/byteback/backup_directory.rb
+++ b/lib/byteback/backup_directory.rb
@@ -1,6 +1,11 @@
+require 'byteback/utils'
+
 module Byteback
   # Represents a particular timestamped backup directory
   class Snapshot
+
+    include Byteback::Util
+
     class << self
       # What order to remove snapshots in to regain disk space?
       #
@@ -111,11 +116,11 @@ module Byteback
     end
 
     def create!(from)
-      system_no_error("/sbin/btrfs subvolume snapshot #{from} #{path}")
+      system_no_error("#{btrfs_bin} subvolume snapshot #{from} #{path}")
     end
 
     def delete!
-      system_no_error("/sbin/btrfs subvolume delete #{path}")
+      system_no_error("#{btrfs_bin} subvolume delete #{path}")
     end
 
     # Returns the size of the given snapshot (runs du, may be slow)
diff --git a/lib/byteback/util.rb b/lib/byteback/util.rb
index 9a993d6..ebf5ca5 100644
--- a/lib/byteback/util.rb
+++ b/lib/byteback/util.rb
@@ -66,5 +66,13 @@ module Byteback
       pid2, status = Process.waitpid2(pid, 0)
       status.exitstatus
     end
+
+    def btrfs_bin
+      %w(/bin/btrfs /sbin/btrfs).each do |path|
+        return path if File.exist?(path)
+      end
+      raise Errno::ENOENT, 'btrfs'
+    end
+
   end
 end