revlog: have an explicit "pack_header" method
Having to pass the version header when retrieving the binary version of every
single entry is a bit silly. So we extract that special logic in its own method.
This also prepare the move to newer revlog format, not storing the header within
an actual entry…
Differential Revision: https://phab.mercurial-scm.org/D10510
Test extension of unfinished states support.
$ mkdir chainify
$ cd chainify
$ cat >> chainify.py <<EOF
> from mercurial import cmdutil, error, extensions, exthelper, node, scmutil, state
> from hgext import rebase
>
> eh = exthelper.exthelper()
>
> extsetup = eh.finalextsetup
> cmdtable = eh.cmdtable
>
> # Rebase calls addunfinished in uisetup, so we have to call it in extsetup.
> # Ideally there'd by an 'extensions.afteruisetup()' just like
> # 'extensions.afterloaded()' to allow nesting multiple commands.
> @eh.extsetup
> def _extsetup(ui):
> state.addunfinished(
> b'chainify',
> b'chainify.state',
> continueflag=True,
> childopnames=[b'rebase'])
>
> def _node(repo, arg):
> return node.hex(scmutil.revsingle(repo, arg).node())
>
> @eh.command(
> b'chainify',
> [(b'r', b'revs', [], b'revs to chain', b'REV'),
> (b'', b'continue', False, b'continue op')],
> b'chainify [-r REV] +',
> inferrepo=True)
> def chainify(ui, repo, **opts):
> """Rebases r1, r2, r3, etc. into a chain."""
> with repo.wlock(), repo.lock():
> cmdstate = state.cmdstate(repo, b'chainify.state')
> if opts['continue']:
> if not cmdstate.exists():
> raise error.Abort(b'no chainify in progress')
> else:
> cmdutil.checkunfinished(repo)
> data = {
> b'tip': _node(repo, opts['revs'][0]),
> b'revs': b','.join(_node(repo, r) for r in opts['revs'][1:]),
> }
> cmdstate.save(1, data)
>
> data = cmdstate.read()
> while data[b'revs']:
> tip = data[b'tip']
> revs = data[b'revs'].split(b',')
> with state.delegating(repo, b'chainify', b'rebase'):
> ui.status(b'rebasing %s onto %s\n' % (revs[0][:12], tip[:12]))
> if state.ischildunfinished(repo, b'chainify', b'rebase'):
> rc = state.continuechild(ui, repo, b'chainify', b'rebase')
> else:
> rc = rebase.rebase(ui, repo, rev=[revs[0]], dest=tip)
> if rc and rc != 0:
> raise error.Abort(b'rebase failed (rc: %d)' % rc)
> data[b'tip'] = _node(repo, b'tip')
> data[b'revs'] = b','.join(revs[1:])
> cmdstate.save(1, data)
> cmdstate.delete()
> ui.status(b'done chainifying\n')
> EOF
$ chainifypath=`pwd`/chainify.py
$ echo '[extensions]' >> $HGRCPATH
$ echo "chainify = $chainifypath" >> $HGRCPATH
$ echo "rebase =" >> $HGRCPATH
$ cd $TESTTMP
$ hg init a
$ cd a
$ echo base > base.txt
$ hg commit -Aqm 'base commit'
$ echo foo > file1
$ hg commit -Aqm 'add file'
$ hg co -q ".^"
$ echo bar > file2
$ hg commit -Aqm 'add other file'
$ hg co -q ".^"
$ echo foo2 > file1
$ hg commit -Aqm 'add conflicting file'
$ hg co -q ".^"
$ hg log --graph --template '{rev} {files}'
o 3 file1
|
| o 2 file2
|/
| o 1 file1
|/
@ 0 base.txt
$ hg chainify -r 8430cfdf77c2 -r f8596309dff8 -r a858b338b3e9
rebasing f8596309dff8 onto 8430cfdf77c2
rebasing 2:f8596309dff8 "add other file"
saved backup bundle to $TESTTMP/* (glob)
rebasing a858b338b3e9 onto 83c722183a8e
rebasing 2:a858b338b3e9 "add conflicting file"
merging file1
warning: conflicts while merging file1! (edit, then use 'hg resolve --mark')
unresolved conflicts (see 'hg resolve', then 'hg chainify --continue')
[240]
$ hg status --config commands.status.verbose=True
M file1
? file1.orig
# The repository is in an unfinished *chainify* state.
# Unresolved merge conflicts:
#
# file1
#
# To mark files as resolved: hg resolve --mark FILE
# To continue: hg chainify --continue
# To abort: hg chainify --abort
$ echo foo3 > file1
$ hg resolve --mark file1
(no more unresolved files)
continue: hg chainify --continue
$ hg chainify --continue
rebasing a858b338b3e9 onto 83c722183a8e
rebasing 2:a858b338b3e9 "add conflicting file"
saved backup bundle to $TESTTMP/* (glob)
done chainifying
$ hg log --graph --template '{rev} {files}'
o 3 file1
|
o 2 file2
|
o 1 file1
|
@ 0 base.txt