[gparted] Sort command line named disk devices and remove duplicates (#755495)

[Curtis Gedak <gedakc src gnome org>]

commit 3d3d98994bd1b3fc56260b65e576cf0f8d6a50ea
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Tue Oct 6 18:50:42 2015 +0100

    Sort command line named disk devices and remove duplicates (#755495)
    
    Order named disk devices so that they appear in the combo box in the
    same order which they would when probed.  Also remove duplicates so that
    the same disk devices aren't scanned multiple times and appear
    duplicated in the UI.
    
    Try this; it used to take ages to load and looked weird:
    
        # gparted /dev/sda /dev/sdb /dev/sda /dev/sdb /dev/sda /dev/sdb
    
    Bug 755495 - GParted allowing partitioning of large sector devices
                 specified on the command line, when built with old
                 libparted which doesn't support it

 src/GParted_Core.cc |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/src/GParted_Core.cc b/src/GParted_Core.cc
index 7c91f6a..6e06077 100644
--- a/src/GParted_Core.cc
+++ b/src/GParted_Core.cc
@@ -229,6 +229,14 @@ void GParted_Core::set_devices_thread( std::vector<Device> * pdevices )
        {
                //Device paths were passed in on the command line.
 
+               // Sort name device paths and remove duplicates.  Avoids repeated scanning
+               // the same device and showing it multiple times in the UI.
+               // Reference:
+               //     What's the most efficient way to erase duplicates and sort a vector?
+               //     
http://stackoverflow.com/questions/1041620/whats-the-most-efficient-way-to-erase-duplicates-and-sort-a-vector
+               std::sort( device_paths.begin(), device_paths.end() );
+               device_paths.erase( std::unique( device_paths.begin(), device_paths.end() ), 
device_paths.end() );
+
                for ( unsigned int t = 0 ; t < device_paths .size() ; t++ ) 
                {
                        set_thread_status_message( String::ucompose( _("Confirming %1"), device_paths[t] ) );