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.

#!/bin/sh

# 0-2-4
#  \ \ \
#   1-3-5
#
# rename in #1, content change in #4.

hg init t
cd t

touch 1
touch 2
hg commit -Am init -d "0 0"  # 0

hg rename 1 1a
hg commit -m rename -d "0 0" # 1

hg co -C 0
echo unrelated >> 2
hg ci -m unrelated1 -d "0 0"  # 2

hg merge --debug 1
hg ci -m merge1 -d "0 0" # 3

hg co -C 2
echo hello >> 1
hg ci -m unrelated2 -d "0 0" # 4

hg co -C 3
hg merge -y --debug 4

hg co -C 4
hg merge -y --debug 3