[m-rev.] Fix test_mercury to use mv rather than cp for backups

[Julien Fischer]

On Tue, 16 Aug 2005, Ian MacLarty wrote:

> On 16 Aug 2005, at 18:03, Julien Fischer wrote:
>
> >
> > On Tue, 16 Aug 2005, Ian MacLarty wrote:
> >
> >> On 16 Aug 2005, at 17:08, Ralph Becket wrote:
> >>
> >>> Estimated hours taken: 0.3
> >>> Branches: main
> >>>
> >>> tools/test_mercury:
> >>> 	Use mv rather than cp to handle the backup directory.
> >>> 	The cp approach fails when disk space is at a premium.
> >>>
> >>> Index: test_mercury
> >>> ===================================================================
> >>> RCS file: /home/mercury1/repository/mercury/tools/test_mercury,v
> >>> retrieving revision 1.252
> >>> diff -u -r1.252 test_mercury
> >>> --- test_mercury	21 Jun 2005 15:18:04 -0000	1.252
> >>> +++ test_mercury	16 Aug 2005 07:04:42 -0000
> >>> @@ -732,8 +732,9 @@
> >>>      # Make a backup copy of the current installation which we will
> >>> restore
> >>>      # if the new installation fails.
> >>>
> >>> -    mkdir -p $INSTALL_DIR/../mercury_install_backup
> >>> -    cp -rf $INSTALL_DIR/* $INSTALL_DIR/../mercury_install_backup
> >>> +    BACKUP_DIR=`basename $INSTALL_DIR`/mercury_install_backup
> >>> +    mv $INSTALL_DIR $BACKUP_DIR
> >>> +    mkdir -p $INSTALL_DIR
> >>>
> >>
> >> Isn't the current installation used to compile the new installation?
> >> If you move it don't you need to tell whatever script builds the new
> >> installation to use the version in the backup directory to do so?
> >
> > We don't compile using the backup version.  If the build fails, the
> > mercury_install_backup directory just gets copied back to its
> > original location.
> >
>
> Yes, but what compiler will be used to do the install if the installed
> compiler is moved to the backup directory beforehand?
>
>
Good point.

Julien.
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