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.
created new head
merging foo1 and foo to foo1
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
n 0 -2 bar
m 644 14 foo1
copy: foo -> foo1
M bar
M foo1
% removing foo1 and bar
r 0 -2 bar
r 0 -1 foo1
copy: foo -> foo1
R bar
R foo1
% readding foo1 and bar
adding bar
adding foo1
n 0 -2 bar
m 644 14 foo1
copy: foo -> foo1
M bar
M foo1
foo
% reverting foo1 and bar
saving current version of bar as bar.orig
reverting bar
saving current version of foo1 as foo1.orig
reverting foo1
n 0 -2 bar
m 644 14 foo1
copy: foo -> foo1
M bar
M foo1
foo