Add option -e/--edit to qrefresh, to edit the existing header.
adding a
% import exported patch
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying ../tip.patch
patching file a
% message should be same
summary: second change
% committer should be same
user: someone
% import of plain diff should fail without message
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying ../tip.patch
patching file a
transaction abort!
rollback completed
% import of plain diff should be ok with message
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying ../tip.patch
patching file a
% import from stdin
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying patch from stdin
patching file a
% override commit message
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying patch from stdin
patching file a
summary: override
% plain diff in email, subject, message body
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying ../msg.patch
patching file a
user: email patcher
summary: email patch
% plain diff in email, no subject, message body
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying patch from stdin
patching file a
% plain diff in email, subject, no message body
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying patch from stdin
patching file a
% plain diff in email, no subject, no message body, should fail
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying patch from stdin
patching file a
transaction abort!
rollback completed
% hg export in email, should use patch header
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying patch from stdin
patching file a
summary: second change