Fix upgrading of root repository

[jhpalmieri]

On sage-devel, there are occasional complaints about the failure to upgrade because of uncommitted files in the root repository. We should address these. The culprit is in the script sage-update, and in particular the lines

    if root_repo_intact:
        P = subprocess.Popen('hg status', shell=True,
                             stdout=subprocess.PIPE)
        output = P.communicate()[0]
        if len(output) > 0: # uncommitted changes
            print ("There are uncommitted changes in the "
                   + "Sage root repository. Aborting.")
            sys.exit(2)

Apply attachment: 12324_status_q.patch to the scripts repository.

CC: @kini

Component: scripts

Keywords: root upgrade

Author: Jeroen Demeyer

Reviewer: John Palmieri

Merged: sage-5.3.rc1

Issue created by migration from https://trac.sagemath.org/ticket/12324

[jdemeyer]

Attachment: 12324_status_q.patch.gz

[jdemeyer]

Author: Jeroen Demeyer

[jdemeyer]

comment:1

"critical" because this annoys me terribly.

[jhpalmieri]

Reviewer: John Palmieri

[jhpalmieri]

comment:4

Looks okay to me. It allows upgrading when there are stray files in the root repo.

[jdemeyer]

Merged: sage-5.3.rc1