Test for command `hg unamend` which lives in uncommit extension

===============================================================

  $ cat >> $HGRCPATH << EOF

  > [alias]

  > glog = log -G -T '{rev}:{node|short}  {desc}'

  > [experimental]

  > evolution = createmarkers, allowunstable

  > [extensions]

  > rebase =

  > amend =

  > uncommit =

  > EOF

Repo Setup

  $ hg init repo

  $ cd repo

  $ for ch in a b c d e f g h; do touch $ch; echo "foo" >> $ch; hg ci -Aqm "Added "$ch; done

  $ hg glog

  @  7:ec2426147f0e  Added h

  |

  o  6:87d6d6676308  Added g

  |

  o  5:825660c69f0c  Added f

  |

  o  4:aa98ab95a928  Added e

  |

  o  3:62615734edd5  Added d

  |

  o  2:28ad74487de9  Added c

  |

  o  1:29becc82797a  Added b

  |

  o  0:18d04c59bb5d  Added a

Trying to unamend when there was no amend done

  $ hg unamend

  abort: changeset must have one predecessor, found 0 predecessors

  [10]

Unamend on clean wdir and tip

  $ echo "bar" >> h

  $ hg amend

  $ hg exp

  # HG changeset patch

  # User test

  # Date 0 0

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

  # Node ID c9fa1a715c1b7661c0fafb362a9f30bd75878d7d

  # Parent  87d6d66763085b629e6d7ed56778c79827273022

  Added h

  diff -r 87d6d6676308 -r c9fa1a715c1b h

  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000

  +++ b/h	Thu Jan 01 00:00:00 1970 +0000

  @@ -0,0 +1,2 @@

  +foo

  +bar

  $ hg glog --hidden

  @  8:c9fa1a715c1b  Added h

  |

  | x  7:ec2426147f0e  Added h

  |/

  o  6:87d6d6676308  Added g

  |

  o  5:825660c69f0c  Added f

  |

  o  4:aa98ab95a928  Added e

  |

  o  3:62615734edd5  Added d

  |

  o  2:28ad74487de9  Added c

  |

  o  1:29becc82797a  Added b

  |

  o  0:18d04c59bb5d  Added a

  $ hg unamend

  $ hg glog --hidden

  @  9:46d02d47eec6  Added h

  |

  | x  8:c9fa1a715c1b  Added h

  |/

  | x  7:ec2426147f0e  Added h

  |/

  o  6:87d6d6676308  Added g

  |

  o  5:825660c69f0c  Added f

  |

  o  4:aa98ab95a928  Added e

  |

  o  3:62615734edd5  Added d

  |

  o  2:28ad74487de9  Added c

  |

  o  1:29becc82797a  Added b

  |

  o  0:18d04c59bb5d  Added a

  $ hg diff

  diff -r 46d02d47eec6 h

  --- a/h	Thu Jan 01 00:00:00 1970 +0000

  +++ b/h	Thu Jan 01 00:00:00 1970 +0000

  @@ -1,1 +1,2 @@

   foo

  +bar

  $ hg exp

  # HG changeset patch

  # User test

  # Date 0 0

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

  # Node ID 46d02d47eec6ca096b8dcab3f8f5579c40c3dd9a

  # Parent  87d6d66763085b629e6d7ed56778c79827273022

  Added h

  diff -r 87d6d6676308 -r 46d02d47eec6 h

  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000

  +++ b/h	Thu Jan 01 00:00:00 1970 +0000

  @@ -0,0 +1,1 @@

  +foo

  $ hg status

  M h

  $ hg log -r . -T '{extras % "{extra}\n"}' --config alias.log=log

  branch=default

  unamend_source=c9fa1a715c1b7661c0fafb362a9f30bd75878d7d

Using unamend to undo an unamed (intentional)

  $ hg unamend

  $ hg exp

  # HG changeset patch

  # User test

  # Date 0 0

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

  # Node ID 850ddfc1bc662997ec6094ada958f01f0cc8070a

  # Parent  87d6d66763085b629e6d7ed56778c79827273022

  Added h

  diff -r 87d6d6676308 -r 850ddfc1bc66 h

  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000

  +++ b/h	Thu Jan 01 00:00:00 1970 +0000

  @@ -0,0 +1,2 @@

  +foo

  +bar

  $ hg diff

Unamend on a dirty working directory

  $ echo "bar" >> a

  $ hg amend

  $ echo "foobar" >> a

  $ echo "bar" >> b

  $ hg status

  M a

  M b

  $ hg unamend

  $ hg status

  M a

  M b

  $ hg diff

  diff -r ec338db45d51 a

  --- a/a	Thu Jan 01 00:00:00 1970 +0000

  +++ b/a	Thu Jan 01 00:00:00 1970 +0000

  @@ -1,1 +1,3 @@

   foo

  +bar

  +foobar

  diff -r ec338db45d51 b

  --- a/b	Thu Jan 01 00:00:00 1970 +0000

  +++ b/b	Thu Jan 01 00:00:00 1970 +0000

  @@ -1,1 +1,2 @@

   foo

  +bar

Unamending an added file

  $ hg ci -m "Added things to a and b"

  $ echo foo > bar

  $ hg add bar

  $ hg amend

  $ hg unamend

  $ hg status

  A bar

  $ hg revert --all

  forgetting bar

Unamending a removed file

  $ hg remove a

  $ hg amend

  $ hg unamend

  $ hg status

  R a

  ? bar

  $ hg revert --all

  undeleting a

Unamending an added file with dirty wdir status

  $ hg add bar

  $ hg amend

  $ echo bar >> bar

  $ hg status

  M bar

  $ hg unamend

  $ hg status

  A bar

  $ hg diff

  diff -r 7f79409af972 bar

  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000

  +++ b/bar	Thu Jan 01 00:00:00 1970 +0000

  @@ -0,0 +1,2 @@

  +foo

  +bar

  $ hg revert --all

  forgetting bar

  $ rm bar

Unamending in middle of a stack

  $ hg glog

  @  19:7f79409af972  Added things to a and b

  |

  o  12:ec338db45d51  Added h

  |

  o  6:87d6d6676308  Added g

  |

  o  5:825660c69f0c  Added f

  |

  o  4:aa98ab95a928  Added e

  |

  o  3:62615734edd5  Added d

  |

  o  2:28ad74487de9  Added c

  |

  o  1:29becc82797a  Added b

  |

  o  0:18d04c59bb5d  Added a

  $ hg up 5

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

  $ echo bar >> f

  $ hg amend

  3 new orphan changesets

  $ hg rebase -s 6 -d . -q

  $ hg glog

  o  23:03ddd6fc5af1  Added things to a and b

  |

  o  22:3e7b64ee157b  Added h

  |

  o  21:49635b68477e  Added g

  |

  @  20:93f0e8ffab32  Added f

  |

  o  4:aa98ab95a928  Added e

  |

  o  3:62615734edd5  Added d

  |

  o  2:28ad74487de9  Added c

  |

  o  1:29becc82797a  Added b

  |

  o  0:18d04c59bb5d  Added a

  $ hg --config experimental.evolution=createmarkers unamend

  abort: cannot unamend changeset with children

  (see 'hg help evolution.instability')

  [10]

  $ hg unamend

  3 new orphan changesets

Trying to unamend a public changeset

  $ hg up -C 23

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

  $ hg phase -r . -p

  1 new phase-divergent changesets

  $ hg unamend

  abort: cannot unamend public changesets

  (see 'hg help phases' for details)

  [10]

Testing whether unamend retains copies or not

  $ hg status

  $ hg mv a foo

  $ hg ci -m "Moved a to foo"

  $ hg exp --git

  # HG changeset patch

  # User test

  # Date 0 0

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

  # Node ID cfef290346fbee5126313d7e1aab51d877679b09

  # Parent  03ddd6fc5af19e028c44a2fd6d790dd22712f231

  Moved a to foo

  diff --git a/a b/foo

  rename from a

  rename to foo

  $ hg mv b foobar

  $ hg diff --git

  diff --git a/b b/foobar

  rename from b

  rename to foobar

  $ hg amend

  $ hg exp --git

  # HG changeset patch

  # User test

  # Date 0 0

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

  # Node ID eca050985275bb271ce3092b54e56ea5c85d29a3

  # Parent  03ddd6fc5af19e028c44a2fd6d790dd22712f231

  Moved a to foo

  diff --git a/a b/foo

  rename from a

  rename to foo

  diff --git a/b b/foobar

  rename from b

  rename to foobar

  $ hg mv c wat

  $ hg unamend

  $ hg verify -v

  repository uses revlog format 1

  checking changesets

  checking manifests

  crosschecking files in changesets and manifests

  checking files

  checked 28 changesets with 16 changes to 11 files

Retained copies in new prdecessor commit

  $ hg exp --git

  # HG changeset patch

  # User test

  # Date 0 0

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

  # Node ID 552e3af4f01f620f88ca27be1f898316235b736a

  # Parent  03ddd6fc5af19e028c44a2fd6d790dd22712f231

  Moved a to foo

  diff --git a/a b/foo

  rename from a

  rename to foo

Retained copies in working directoy

  $ hg diff --git

  diff --git a/b b/foobar

  rename from b

  rename to foobar

  diff --git a/c b/wat

  rename from c

  rename to wat

  $ hg revert -qa

  $ rm foobar wat

Rename a->b, then amend b->c. After unamend, should look like b->c.

  $ hg co -q 0

  $ hg mv a b

  $ hg ci -qm 'move to a b'

  $ hg mv b c

  $ hg amend

  $ hg unamend

  $ hg st --copies --change .

  A b

    a

  R a

  $ hg st --copies

  A c

    b

  R b

  $ hg revert -qa

  $ rm c

Rename a->b, then amend b->c, and working copy change c->d. After unamend, should look like b->d

  $ hg co -q 0

  $ hg mv a b

  $ hg ci -qm 'move to a b'

  warning: commit already existed in the repository!