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
heads()
{
hg heads --template '#rev#: #desc|firstline|strip#\n' "$@"
}
hg init a
cd a
echo 'root' >root
hg add root
hg commit -m "Adding root node"
heads
echo '-------'
heads .
echo '======='
echo 'a' >a
hg add a
hg branch a
hg commit -m "Adding a branch"
heads
echo '-------'
heads .
echo '======='
hg update -C 0
echo 'b' >b
hg add b
hg branch b
hg commit -m "Adding b branch"
heads
echo '-------'
heads .
echo '======='
echo 'bh1' >bh1
hg add bh1
hg commit -m "Adding b branch head 1"
heads
echo '-------'
heads .
echo '======='
hg update -C 2
echo 'bh2' >bh2
hg add bh2
hg commit -m "Adding b branch head 2"
heads
echo '-------'
heads .
echo '======='
hg update -C 2
echo 'bh3' >bh3
hg add bh3
hg commit -m "Adding b branch head 3"
heads
echo '-------'
heads .
echo '======='
hg merge 4
hg commit -m "Merging b branch head 2 and b branch head 3"
heads
echo '-------'
heads .
echo '======='
echo 'c' >c
hg add c
hg branch c
hg commit -m "Adding c branch"
heads
echo '-------'
heads .
echo '======='
heads -r 3 .
echo $?
echo '-------'
heads -r 2 .
echo $?
echo '-------'
hg update -C 4
echo $?
echo '-------'
heads -r 3 .
echo $?
echo '-------'
heads -r 2 .
echo $?
echo '-------'
heads -r 7 .
echo $?
echo '======='
for i in 0 1 2 3 4 5 6 7; do
hg update -C "$i"
heads
echo '-------'
heads .
echo '-------'
done
echo '======='
for i in a b c z; do
heads "$i"
echo '-------'
done
echo '======='
heads 0 1 2 3 4 5 6 7