hgweb: catch util.Abort raised by addchangegroup
Right now, if a pretxnchangegroup hook fails, we send some HTML
error message to the client and the transaction is not rolled back
(issue499).
Catching util.Abort allows us to send a decent message to the client
and for some reason makes the rollback complete.
This patch is not perfect since it doesn't fix the reason why the
transaction wasn't rolled back (maybe some circular references?).
Also, the transaction is aborted only after we've sent the response
back to the client and the "transaction aborted" message ends up in
the logs of the web server.
# revision 0
adding copy
adding move
adding remove
adding unchanged
adding zzz1_merge_ok
adding zzz2_merge_bad
# revision 1
# local changes to revision 0
4 files updated, 0 files merged, 3 files removed, 0 files unresolved
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new last line
--- a/zzz2_merge_bad
+++ b/zzz2_merge_bad
+another last line
M zzz1_merge_ok
M zzz2_merge_bad
# local merge with bad merge tool
merging zzz1_merge_ok
merging zzz1_merge_ok failed!
merging zzz2_merge_bad
merging zzz2_merge_bad failed!
3 files updated, 0 files merged, 2 files removed, 2 files unresolved
There are unresolved merges with locally modified files.
You can redo the full merge using:
hg update 0
hg update 1
2 files updated, 0 files merged, 3 files removed, 0 files unresolved
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new last line
--- a/zzz2_merge_bad
+++ b/zzz2_merge_bad
+another last line
M zzz1_merge_ok
M zzz2_merge_bad
# local merge with conflicts
merge: warning: conflicts during merge
merging zzz1_merge_ok
merging zzz2_merge_bad
merging zzz2_merge_bad failed!
3 files updated, 1 files merged, 2 files removed, 1 files unresolved
There are unresolved merges with locally modified files.
You can finish the partial merge using:
hg update 0
hg update 1
2 files updated, 0 files merged, 3 files removed, 0 files unresolved
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new first line
+new last line
--- a/zzz2_merge_bad
+++ b/zzz2_merge_bad
+another last line
+=======
+new last line
M zzz1_merge_ok
M zzz2_merge_bad
# local merge without conflicts
merging zzz1_merge_ok
4 files updated, 1 files merged, 2 files removed, 0 files unresolved
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new last line
M zzz1_merge_ok
? zzz2_merge_bad.orig