$ cat >> $HGRCPATH <<EOF

  > [extensions]

  > graphlog=

  > histedit=

  > EOF

  $ initrepos ()

  > {

  >     hg init r

  >     cd r

  >     for x in a b c ; do

  >         echo $x > $x

  >         hg add $x

  >         hg ci -m $x

  >     done

  >     cd ..

  >     hg clone r r2 | grep -v updating

  >     cd r2

  >     for x in d e f ; do

  >         echo $x > $x

  >         hg add $x

  >         hg ci -m $x

  >     done

  >     cd ..

  >     hg init r3

  >     cd r3

  >     for x in g h i ; do

  >         echo $x > $x

  >         hg add $x

  >         hg ci -m $x

  >     done

  >     cd ..

  > }

  $ initrepos

  3 files updated, 0 files merged, 0 files removed, 0 files unresolved

show the edit commands offered by outgoing

  $ cd r2

  $ HGEDITOR=cat hg histedit --outgoing ../r | grep -v comparing | grep -v searching

  pick 055a42cdd887 3 d

  pick e860deea161a 4 e

  pick 652413bf663e 5 f

  # Edit history between 055a42cdd887 and 652413bf663e

  #

  # Commands:

  #  p, pick = use commit

  #  e, edit = use commit, but stop for amending

  #  f, fold = use commit, but fold into previous commit (combines N and N-1)

  #  d, drop = remove commit from history

  #  m, mess = edit message without changing commit content

  #

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

  $ cd ..

show the error from unrelated repos

  $ cd r3

  $ HGEDITOR=cat hg histedit --outgoing ../r | grep -v comparing | grep -v searching

  abort: repository is unrelated

  [1]

  $ cd ..

show the error from unrelated repos

  $ cd r3

  $ HGEDITOR=cat hg histedit --force --outgoing ../r

  comparing with ../r

  searching for changes

  warning: repository is unrelated

  pick 2a4042b45417 0 g

  pick 68c46b4927ce 1 h

  pick 51281e65ba79 2 i

  # Edit history between 2a4042b45417 and 51281e65ba79

  #

  # Commands:

  #  p, pick = use commit

  #  e, edit = use commit, but stop for amending

  #  f, fold = use commit, but fold into previous commit (combines N and N-1)

  #  d, drop = remove commit from history

  #  m, mess = edit message without changing commit content

  #

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

  $ cd ..