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.
% qimport non-existing-file
abort: unable to read non-existing-file
% import URL
adding url.diff to series file
url.diff
% import patch that already exists
abort: patch "url.diff" already exists
applying url.diff
Now at: url.diff
foo
Patch queue now empty
% qimport -f
adding url.diff to series file
applying url.diff
Now at: url.diff
foo2
Patch queue now empty
% build diff with CRLF
adding b
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% qimport CRLF diff
adding b.diff to series file
applying b.diff
Now at: b.diff