convert/gnuarch: parse continuation-of revisions in gnuarch source
In GNU Arch, continuation-of was often used for:
- tagging revisions
- continue working on a project in a new archive, because arch
was scaling poorly in revision numbers (cat-logs were slow
to be parsed and scanned through)
- very similar to the previous point, fork his own branch of
a project.
Parsing this header information will allow to 'follow' new history
because it often hints at older/forked/personal revision trees.
This patch however just implements the parsing of the
continuation-of header. A followup patch will implement the proper
use of this new information.
adding bar
adding foo
adding quux1
adding quux2
created new head
merging bar
merging bar failed!
merging foo and baz to baz
1 files updated, 1 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
U bar
R baz
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
merging bar
merging bar failed!
merging baz and foo to baz
1 files updated, 1 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
% show unresolved
U bar
R baz
% unmark baz
% show
U bar
U baz
% re-resolve baz
merging baz and foo to baz
% after
U bar
R baz
% resolve all warning
abort: no files or directories specified; use --all to remerge all files
% resolve all
merging bar
warning: conflicts during merge.
merging bar failed!
% after
U bar
R baz