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
echo "[extensions]" >> $HGRCPATH
echo "hgext.convert = " >> $HGRCPATH
echo "[convert]" >> $HGRCPATH
echo "hg.tagsbranch=0" >> $HGRCPATH
hg init source
cd source
echo a > a
hg ci -qAm adda
# Add a merge with one parent in the same branch
echo a >> a
hg ci -qAm changea
hg up -qC 0
hg branch branch0
echo b > b
hg ci -qAm addb
hg up -qC
hg merge default
hg ci -qm mergeab
hg tag -ql mergeab
cd ..
# Miss perl... sometimes
cat > filter.py <<EOF
import sys, re
r = re.compile(r'^(?:\d+|pulling from)')
sys.stdout.writelines([l for l in sys.stdin if r.search(l)])
EOF
echo % convert
hg convert -v --config convert.hg.clonebranches=1 source dest |
python filter.py
# Add a merge with both parents and child in different branches
cd source
hg branch branch1
echo a > file1
hg ci -qAm c1
hg up -qC mergeab
hg branch branch2
echo a > file2
hg ci -qAm c2
hg merge branch1
hg branch branch3
hg ci -qAm c3
cd ..
echo % incremental conversion
hg convert -v --config convert.hg.clonebranches=1 source dest |
python filter.py