$ . "$TESTDIR/narrow-library.sh"

  $ hg init master

  $ cd master

  $ mkdir inside

  $ echo inside > inside/f1

  $ mkdir outside

  $ echo outside > outside/f2

  $ mkdir patchdir

  $ echo patch_this > patchdir/f3

  $ hg ci -Aqm 'initial'

  $ cd ..

  $ hg clone --narrow ssh://user@dummy/master narrow --include inside

  requesting all changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

  new changesets dff6a2a6d433

  updating to branch default

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd narrow

  $ mkdir outside

  $ echo other_contents > outside/f2

  $ hg tracked | grep outside

  [1]

  $ hg files | grep outside

  [1]

  $ hg status

`hg status` did not add outside.

  $ hg tracked | grep outside

  [1]

  $ hg files | grep outside

  [1]

Unfortunately this is not really a candidate for adding to narrowhg proper,

since it depends on some other source for providing the manifests (when using

treemanifests) and file contents. Something like a virtual filesystem and/or

remotefilelog. We want to be useful when not using those systems, so we do not

have this method available in narrowhg proper at the moment.

  $ cat > "$TESTTMP/expand_extension.py" <<EOF

  > import os

  > import sys

  > 

  > from mercurial import encoding

  > from mercurial import extensions

  > from mercurial import localrepo

  > from mercurial import match as matchmod

  > from mercurial import narrowspec

  > from mercurial import patch

  > from mercurial import util as hgutil

  > 

  > def expandnarrowspec(ui, repo, newincludes=None):

  >   if not newincludes:

  >     return

  >   import sys

  >   newincludes = set([newincludes])

  >   includes, excludes = repo.narrowpats

  >   currentmatcher = narrowspec.match(repo.root, includes, excludes)

  >   includes = includes | newincludes

  >   if not repo.currenttransaction():

  >     ui.develwarn(b'expandnarrowspec called outside of transaction!')

  >   repo.setnarrowpats(includes, excludes)

  >   newmatcher = narrowspec.match(repo.root, includes, excludes)

  >   added = matchmod.differencematcher(newmatcher, currentmatcher)

  >   for f in repo[b'.'].manifest().walk(added):

  >     repo.dirstate.normallookup(f)

  > 

  >       with repo.wlock(), repo.lock(), repo.transaction(

  >           b'expandnarrowspec'):

  >         expandnarrowspec(ui, repo,

  >                          encoding.environ.get(b'DIRSTATEINCLUDES'))

  >   repo.__class__ = expandingrepo

  > 

  > def extsetup(unused_ui):

  >   def overridepatch(orig, ui, repo, *args, **kwargs):

  >     with repo.wlock():

  >       expandnarrowspec(ui, repo, encoding.environ.get(b'PATCHINCLUDES'))

  >       return orig(ui, repo, *args, **kwargs)

  > 

  >   extensions.wrapfunction(patch, b'patch', overridepatch)

  > EOF

  $ cat >> ".hg/hgrc" <<EOF

  > [extensions]

  > expand_extension = $TESTTMP/expand_extension.py

  > EOF

Since we do not have the ability to rely on a virtual filesystem or

remotefilelog in the test, we just fake it by copying the data from the 'master'

repo.

  $ cp -a ../master/.hg/store/data/* .hg/store/data

Do that for patchdir as well.

  $ cp -a ../master/patchdir .

`hg status` will now add outside, but not patchdir.

  $ DIRSTATEINCLUDES=path:outside hg status

  M outside/f2

  $ hg tracked | grep outside

  I path:outside

  $ hg files | grep outside > /dev/null

  $ hg tracked | grep patchdir

  [1]

  $ hg files | grep patchdir

  [1]

Get rid of the modification to outside/f2.

  $ hg update -C .

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

This patch will not apply cleanly at the moment, so `hg import` will break

  $ cat > "$TESTTMP/foo.patch" <<EOF

  > --- patchdir/f3

  > +++ patchdir/f3

  > @@ -1,1 +1,1 @@

  > -this should be "patch_this", but its not, so patch fails

  > +this text is irrelevant

  > EOF

  $ PATCHINCLUDES=path:patchdir hg import -p0 -e "$TESTTMP/foo.patch" -m ignored

  applying $TESTTMP/foo.patch

  patching file patchdir/f3

  Hunk #1 FAILED at 0

  1 out of 1 hunks FAILED -- saving rejects to file patchdir/f3.rej

  abort: patch failed to apply

  [255]

  $ hg tracked | grep patchdir

  [1]

  $ hg files | grep patchdir > /dev/null

  [1]

Let's make it apply cleanly and see that it *did* expand properly

  $ cat > "$TESTTMP/foo.patch" <<EOF

  > --- patchdir/f3

  > +++ patchdir/f3

  > @@ -1,1 +1,1 @@

  > -patch_this

  > +patched_this

  > EOF

  $ PATCHINCLUDES=path:patchdir hg import -p0 -e "$TESTTMP/foo.patch" -m message

  applying $TESTTMP/foo.patch

  $ cat patchdir/f3

  patched_this

  $ hg tracked | grep patchdir

  I path:patchdir

  $ hg files | grep patchdir > /dev/null