This will hopefully give the applications which might have a handle to some
file in that directory open a chance to close them up so that the replace
operation would finish successfully.
This patch makes sure that we test to make sure we can create a
directory in the installation directory and also in its parent (the
latter check only happens on Windows and Linux), so that we wouldn't try
to stage an update in the background if that's bound to fail if we don't
have the require write permissions.
This will cause us to fall back to a non-background update with a UAC prompt,
which sucks, but at least it lets the user to update.
--HG--
extra : transplant_source : z%00/Z%ED%E3gj%A2%E6%244%D0%B0%AE%A1zdPT
When Firefox downloads an update, it previously kept the update around to apply
it on the next restart. This patch changes this so that the updater program
is launched in the background as soon as the update has finished downloading
in order to stage the updated version of the application by copying the
existing installation directory to a temporary location and applying the update
on top of it, and replace the existing installation directory with the staged
directory on the next restart.
Because the replacing step is typically very fast, this patch eliminates the
wait for the update to be applied on restart, making it unnecessary to show a
progress dialog when restarting.
--HG--
rename : toolkit/mozapps/update/test/chrome/test_0092_finishedBackground.xul => toolkit/mozapps/update/test/chrome/test_0093_stagedBackground.xul
rename : toolkit/mozapps/update/test/unit/test_0110_general.js => toolkit/mozapps/update/test/unit/test_0113_general.js
rename : toolkit/mozapps/update/test/unit/test_0111_general.js => toolkit/mozapps/update/test/unit/test_0114_general.js
rename : toolkit/mozapps/update/test/unit/test_0112_general.js => toolkit/mozapps/update/test/unit/test_0115_general.js
rename : toolkit/mozapps/update/test/unit/test_0170_fileLocked_xp_win_complete.js => toolkit/mozapps/update/test/unit/test_0172_fileLocked_xp_win_complete.js
rename : toolkit/mozapps/update/test/unit/test_0171_fileLocked_xp_win_partial.js => toolkit/mozapps/update/test/unit/test_0173_fileLocked_xp_win_partial.js
rename : toolkit/mozapps/update/test/unit/test_0110_general.js => toolkit/mozapps/update/test_svc/unit/test_0113_general_svc.js
rename : toolkit/mozapps/update/test/unit/test_0111_general.js => toolkit/mozapps/update/test_svc/unit/test_0114_general_svc.js
rename : toolkit/mozapps/update/test/unit/test_0112_general.js => toolkit/mozapps/update/test_svc/unit/test_0115_general_svc.js
rename : toolkit/mozapps/update/test/unit/test_0170_fileLocked_xp_win_complete.js => toolkit/mozapps/update/test_svc/unit/test_0172_fileLocked_xp_win_complete_svc.js
rename : toolkit/mozapps/update/test/unit/test_0171_fileLocked_xp_win_partial.js => toolkit/mozapps/update/test_svc/unit/test_0173_fileLocked_xp_win_partial_svc.js
