diff tests/test-rebase-scenario-global.t @ 31225:749b057b01f3

rebase: allow aborting if last-message.txt is missing

Previously, if .hg/rebasestate existed but .hg/last-message.txt was missing, 'hg
rebase --abort' would say there's no rebase in progress but 'hg checkout foo'
would say 'abort: rebase in progress'. It turns out loading the collapse message
will throw a "no rebase in progress" error if the file doesn't exist, even
though .hg/rebasestate obviously indicates a rebase is in progress.

The fix is to only throw an exception if we're trying to --continue, and to just
eat the issues if we're doing --abort.

This issue is exposed by us writing the rebase state earlier in the process.
This will be used by later patches to ensure the user can appropriately 'hg
rebase --abort' if there's a crash before the first the first commit has
finished rebasing. Tests cover all of this. The only negative affect is we now
require a hg rebase --abort in a very specific exception case, as shown in the
test.

--- a/tests/test-rebase-scenario-global.t	Tue Mar 07 14:04:29 2017 -0800
+++ b/tests/test-rebase-scenario-global.t	Tue Mar 07 16:30:31 2017 -0800
@@ -272,7 +272,8 @@
   rebasing 6:eea13746799a "G"
   abort: cannot use revision 6 as base, result would have 3 parents
   [255]
-
+  $ hg rebase --abort
+  rebase aborted
 
 These will abort gracefully (using --base):