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
hg init
echo % should fail
hg add .hg/00changelog.i
mkdir a
echo a > a/a
hg ci -Ama
ln -s a b
echo b > a/b
echo % should fail
hg add b/b
echo % should succeed
hg add b
echo % should still fail - maybe
hg add b/b
echo % unbundle tampered bundle
hg init target
cd target
hg unbundle $TESTDIR/tampered.hg
echo % attack .hg/test
hg manifest -r0
hg update -Cr0
echo % attack foo/.hg/test
hg manifest -r1
hg update -Cr1
echo % attack back/test where back symlinks to ..
hg manifest -r2
hg update -Cr2
echo % attack ../test
hg manifest -r3
hg update -Cr3
exit 0