$ . "$TESTDIR/histedit-helpers.sh"

  $ cat >> $HGRCPATH <<EOF

  > [extensions]

  > graphlog=

  > histedit=

  > EOF

  $ EDITED="$TESTTMP/editedhistory"

  $ cat > $EDITED <<EOF

  > pick e860deea161a e

  > pick 652413bf663e f

  > fold 177f92b77385 c

  > pick 055a42cdd887 d

  > EOF

  $ initrepo ()

  > {

  >     hg init r

  >     cd r

  >     for x in a b c d e f ; do

  >         echo $x > $x

  >         hg add $x

  >         hg ci -m $x

  >     done

  > }

  $ initrepo

log before edit

  $ hg log --graph

  @  changeset:   5:652413bf663e

  |  tag:         tip

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     f

  |

  o  changeset:   4:e860deea161a

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     e

  |

  o  changeset:   3:055a42cdd887

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     d

  |

  o  changeset:   2:177f92b77385

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     c

  |

  o  changeset:   1:d2ae7f538514

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     b

  |

  o  changeset:   0:cb9a9f314b8b

     user:        test

     date:        Thu Jan 01 00:00:00 1970 +0000

     summary:     a

edit the history

  $ HGEDITOR="cat \"$EDITED\" > " hg histedit 177f92b77385 2>&1 | fixbundle

  0 files updated, 0 files merged, 4 files removed, 0 files unresolved

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

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

  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

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

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

log after edit

  $ hg log --graph

  @  changeset:   4:82b0c1ff1777

  |  tag:         tip

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     d

  |

  o  changeset:   3:150aafb44a91

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     pick e860deea161a e

  |

  o  changeset:   2:493dc0964412

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     e

  |

  o  changeset:   1:d2ae7f538514

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     b

  |

  o  changeset:   0:cb9a9f314b8b

     user:        test

     date:        Thu Jan 01 00:00:00 1970 +0000

     summary:     a

post-fold manifest

  $ hg manifest

  a

  b

  c

  d

  e

  f

  $ cd ..

folding and creating no new change doesn't break:

  $ mkdir fold-to-empty-test

  $ cd fold-to-empty-test

  $ hg init

  $ printf "1\n2\n3\n" > file

  $ hg add file

  $ hg commit -m '1+2+3'

  $ echo 4 >> file

  $ hg commit -m '+4'

  $ echo 5 >> file

  $ hg commit -m '+5'

  $ echo 6 >> file

  $ hg commit -m '+6'

  $ hg log --graph

  @  changeset:   3:251d831eeec5

  |  tag:         tip

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     +6

  |

  o  changeset:   2:888f9082bf99

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     +5

  |

  o  changeset:   1:617f94f13c0f

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     +4

  |

  o  changeset:   0:0189ba417d34

     user:        test

     date:        Thu Jan 01 00:00:00 1970 +0000

     summary:     1+2+3

  $ cat > editor.py <<EOF

  > import re, sys

  > rules = sys.argv[1]

  > data = open(rules).read()

  > data = re.sub(r'pick ([0-9a-f]{12} 2 \+5)', r'drop \1', data)

  > data = re.sub(r'pick ([0-9a-f]{12} 2 \+6)', r'fold \1', data)

  > open(rules, 'w').write(data)

  > EOF

  $ HGEDITOR='python editor.py' hg histedit 1

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

  patching file file

  Hunk #1 FAILED at 2

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

  abort: Fix up the change and run hg histedit --continue

  [255]

There were conflicts, but we'll continue without resolving. This

should effectively drop the changes from +6.

  $ hg status

  ? editor.py

  ? file.rej

  $ hg histedit --continue

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

  saved backup bundle to $TESTTMP/*-backup.hg (glob)

  $ hg log --graph

  @  changeset:   1:617f94f13c0f

  |  tag:         tip

  |  user:        test

  |  date:        Thu Jan 01 00:00:00 1970 +0000

  |  summary:     +4

  |

  o  changeset:   0:0189ba417d34

     user:        test

     date:        Thu Jan 01 00:00:00 1970 +0000

     summary:     1+2+3

  $ cd ..

Test corner case where folded revision is separated from its parent by a

dropped revision.

  $ hg init fold-with-dropped

  $ cd fold-with-dropped

  $ printf "1\n2\n3\n" > file

  $ hg commit -Am '1+2+3'

  adding file

  $ echo 4 >> file

  $ hg commit -m '+4'

  $ echo 5 >> file

  $ hg commit -m '+5'

  $ echo 6 >> file

  $ hg commit -m '+6'

  $ hg log -G --template '{rev}:{node|short} {desc|firstline}\n'

  @  3:251d831eeec5 +6

  |

  o  2:888f9082bf99 +5

  |

  o  1:617f94f13c0f +4

  |

  o  0:0189ba417d34 1+2+3

  $ EDITED="$TESTTMP/editcommands"

  $ cat > $EDITED <<EOF

  > pick 617f94f13c0f 1 +4

  > drop 888f9082bf99 2 +5

  > fold 251d831eeec5 3 +6

  > EOF

  $ HGEDITOR="cat $EDITED >" hg histedit 1

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

  patching file file

  Hunk #1 FAILED at 2

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

  abort: Fix up the change and run hg histedit --continue

  [255]

  $ echo 5 >> file

  $ hg commit -m '+5.2'

  created new head

  $ echo 6 >> file

  $ HGEDITOR=cat hg histedit --continue

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

  +4

  ***

  +5.2

  ***

  +6

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

  saved backup bundle to $TESTTMP/fold-with-dropped/.hg/strip-backup/617f94f13c0f-backup.hg (glob)

  $ cd ..