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 a
adding b/b
% file replaced with directory
% should fail - would corrupt dirstate
abort: file 'a' in dirstate clashes with 'a/a'
% removing shadow
% should succeed - shadow removed
% directory replaced with file
% should fail - would corrupt dirstate
abort: directory 'b' already in dirstate
% removing shadow
% should succeed - shadow removed
% look what we got
A a/a
A b
R a
R b/b
% revert reintroducing shadow - should fail
abort: file 'b' in dirstate clashes with 'b/b'
% revert all - should succeed
undeleting a
forgetting a/a
forgetting b
undeleting b/b
% addremove
removing a
adding a/a
adding b
removing b/b
A a/a
A b
R a
R b/b
% commit
C a/a
C b
% long directory replaced with file
adding d/d/d
% should fail - would corrupt dirstate
abort: directory 'd' already in dirstate
% removing shadow
% should succeed - shadow removed
% update should work at least with clean workdir
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
C a
C b/b
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
C a/a
C b