view tests/test-split.t @ 44644:dbe9182c90f5

phabricator: combine commit messages into the review when folding commits

No visible changes here, until an option to enable it is added to `phabsend`.

This combines the Differential fields like Arcanist does, rather than simply
concatenating the text blocks.  Aside from populating everything properly in the
web interface, Phabricator fails the review create/update if repeated fields are
seen as would happen with simple concatenation.

On the flip side, now that the Summary and Test Plan fields can contain data
from multiple commits, we can't just join these fields together to determine if
an amend is needed.  If that were to happen, every single commit in the folded
range would get amended with the combined commit message, which seems clearly
wrong.  Aside from making a minor assumption about the content of the
Differential Revision field (it seems they allow some minor variances with
spacing), this means that for folded reviews, you can't post it, go to the web
page add a missing Test Plan, and then get it added to the commit message by
re-posting it.  I don't think that's a big deal.

Differential Revision: https://phab.mercurial-scm.org/D8309

#testcases obsstore-on obsstore-off

  $ cat > $TESTTMP/editor.py <<EOF
  > #!"$PYTHON"
  > import os
  > import sys
  > path = os.path.join(os.environ['TESTTMP'], 'messages')
  > messages = open(path).read().split('--\n')
  > prompt = open(sys.argv[1]).read()
  > sys.stdout.write(''.join('EDITOR: %s' % l for l in prompt.splitlines(True)))
  > sys.stdout.flush()
  > with open(sys.argv[1], 'w') as f:
  >    f.write(messages[0])
  > with open(path, 'w') as f:
  >    f.write('--\n'.join(messages[1:]))
  > EOF

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > drawdag=$TESTDIR/drawdag.py
  > split=
  > [ui]
  > interactive=1
  > color=no
  > paginate=never
  > [diff]
  > git=1
  > unified=0
  > [commands]
  > commit.interactive.unified=0
  > [alias]
  > glog=log -G -T '{rev}:{node|short} {desc} {bookmarks}\n'
  > EOF

#if obsstore-on
  $ cat >> $HGRCPATH <<EOF
  > [experimental]
  > evolution=all
  > EOF
#endif

  $ hg init a
  $ cd a

Nothing to split

  $ hg split
  nothing to split
  [1]

  $ hg commit -m empty --config ui.allowemptycommit=1
  $ hg split
  abort: cannot split an empty revision
  [255]

  $ rm -rf .hg
  $ hg init

Cannot split working directory

  $ hg split -r 'wdir()'
  abort: cannot split working directory
  [255]

Generate some content.  The sed filter drop CR on Windows, which is dropped in
the a > b line.

  $ $TESTDIR/seq.py 1 5 | sed 's/\r$//' >> a
  $ hg ci -m a1 -A a -q
  $ hg bookmark -i r1
  $ sed 's/1/11/;s/3/33/;s/5/55/' a > b
  $ mv b a
  $ hg ci -m a2 -q
  $ hg bookmark -i r2

Cannot split a public changeset

  $ hg phase --public -r 'all()'
  $ hg split .
  abort: cannot split public changesets
  (see 'hg help phases' for details)
  [255]

  $ hg phase --draft -f -r 'all()'

Cannot split while working directory is dirty

  $ touch dirty
  $ hg add dirty
  $ hg split .
  abort: uncommitted changes
  [255]
  $ hg forget dirty
  $ rm dirty

Make a clean directory for future tests to build off of

  $ cp -R . ../clean

Split a head

  $ hg bookmark r3

  $ hg split 'all()'
  abort: cannot split multiple revisions
  [255]

This function splits a bit strangely primarily to avoid changing the behavior of
the test after a bug was fixed with how split/commit --interactive handled
`commands.commit.interactive.unified=0`: when there were no context lines,
it kept only the last diff hunk. When running split, this meant that runsplit
was always recording three commits, one for each diff hunk, in reverse order
(the base commit was the last diff hunk in the file).
  $ runsplit() {
  > cat > $TESTTMP/messages <<EOF
  > split 1
  > --
  > split 2
  > --
  > split 3
  > EOF
  > cat <<EOF | hg split "$@"
  > y
  > n
  > n
  > y
  > y
  > n
  > y
  > y
  > y
  > EOF
  > }

  $ HGEDITOR=false runsplit
  diff --git a/a b/a
  3 hunks, 3 lines changed
  examine changes to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  @@ -1,1 +1,1 @@
  -1
  +11
  record change 1/3 to 'a'?
  (enter ? for help) [Ynesfdaq?] n
  
  @@ -3,1 +3,1 @@ 2
  -3
  +33
  record change 2/3 to 'a'?
  (enter ? for help) [Ynesfdaq?] n
  
  @@ -5,1 +5,1 @@ 4
  -5
  +55
  record change 3/3 to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  transaction abort!
  rollback completed
  abort: edit failed: false exited with status 1
  [255]
  $ hg status

  $ HGEDITOR="\"$PYTHON\" $TESTTMP/editor.py"
  $ runsplit
  diff --git a/a b/a
  3 hunks, 3 lines changed
  examine changes to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  @@ -1,1 +1,1 @@
  -1
  +11
  record change 1/3 to 'a'?
  (enter ? for help) [Ynesfdaq?] n
  
  @@ -3,1 +3,1 @@ 2
  -3
  +33
  record change 2/3 to 'a'?
  (enter ? for help) [Ynesfdaq?] n
  
  @@ -5,1 +5,1 @@ 4
  -5
  +55
  record change 3/3 to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  EDITOR: HG: Splitting 1df0d5c5a3ab. Write commit message for the first split changeset.
  EDITOR: a2
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed a
  created new head
  diff --git a/a b/a
  2 hunks, 2 lines changed
  examine changes to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  @@ -1,1 +1,1 @@
  -1
  +11
  record change 1/2 to 'a'?
  (enter ? for help) [Ynesfdaq?] n
  
  @@ -3,1 +3,1 @@ 2
  -3
  +33
  record change 2/2 to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  EDITOR: HG: Splitting 1df0d5c5a3ab. So far it has been split into:
  EDITOR: HG: - e704349bd21b: split 1
  EDITOR: HG: Write commit message for the next split changeset.
  EDITOR: a2
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed a
  diff --git a/a b/a
  1 hunks, 1 lines changed
  examine changes to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  @@ -1,1 +1,1 @@
  -1
  +11
  record this change to 'a'?
  (enter ? for help) [Ynesfdaq?] y
  
  EDITOR: HG: Splitting 1df0d5c5a3ab. So far it has been split into:
  EDITOR: HG: - e704349bd21b: split 1
  EDITOR: HG: - a09ad58faae3: split 2
  EDITOR: HG: Write commit message for the next split changeset.
  EDITOR: a2
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed a
  saved backup bundle to $TESTTMP/a/.hg/strip-backup/1df0d5c5a3ab-8341b760-split.hg (obsstore-off !)

#if obsstore-off
  $ hg bookmark
     r1                        0:a61bcde8c529
     r2                        3:00eebaf8d2e2
   * r3                        3:00eebaf8d2e2
  $ hg glog -p
  @  3:00eebaf8d2e2 split 3 r2 r3
  |  diff --git a/a b/a
  |  --- a/a
  |  +++ b/a
  |  @@ -1,1 +1,1 @@
  |  -1
  |  +11
  |
  o  2:a09ad58faae3 split 2
  |  diff --git a/a b/a
  |  --- a/a
  |  +++ b/a
  |  @@ -3,1 +3,1 @@
  |  -3
  |  +33
  |
  o  1:e704349bd21b split 1
  |  diff --git a/a b/a
  |  --- a/a
  |  +++ b/a
  |  @@ -5,1 +5,1 @@
  |  -5
  |  +55
  |
  o  0:a61bcde8c529 a1 r1
     diff --git a/a b/a
     new file mode 100644
     --- /dev/null
     +++ b/a
     @@ -0,0 +1,5 @@
     +1
     +2
     +3
     +4
     +5
  
#else
  $ hg bookmark
     r1                        0:a61bcde8c529
     r2                        4:00eebaf8d2e2
   * r3                        4:00eebaf8d2e2
  $ hg glog
  @  4:00eebaf8d2e2 split 3 r2 r3
  |
  o  3:a09ad58faae3 split 2
  |
  o  2:e704349bd21b split 1
  |
  o  0:a61bcde8c529 a1 r1
  
#endif

Split a head while working parent is not that head

  $ cp -R $TESTTMP/clean $TESTTMP/b
  $ cd $TESTTMP/b

  $ hg up 0 -q
  $ hg bookmark r3

  $ runsplit tip >/dev/null

#if obsstore-off
  $ hg bookmark
     r1                        0:a61bcde8c529
     r2                        3:00eebaf8d2e2
   * r3                        0:a61bcde8c529
  $ hg glog
  o  3:00eebaf8d2e2 split 3 r2
  |
  o  2:a09ad58faae3 split 2
  |
  o  1:e704349bd21b split 1
  |
  @  0:a61bcde8c529 a1 r1 r3
  
#else
  $ hg bookmark
     r1                        0:a61bcde8c529
     r2                        4:00eebaf8d2e2
   * r3                        0:a61bcde8c529
  $ hg glog
  o  4:00eebaf8d2e2 split 3 r2
  |
  o  3:a09ad58faae3 split 2
  |
  o  2:e704349bd21b split 1
  |
  @  0:a61bcde8c529 a1 r1 r3
  
#endif

Split a non-head

  $ cp -R $TESTTMP/clean $TESTTMP/c
  $ cd $TESTTMP/c
  $ echo d > d
  $ hg ci -m d1 -A d
  $ hg bookmark -i d1
  $ echo 2 >> d
  $ hg ci -m d2
  $ echo 3 >> d
  $ hg ci -m d3
  $ hg bookmark -i d3
  $ hg up '.^' -q
  $ hg bookmark d2
  $ cp -R . ../d

  $ runsplit -r 1 | grep rebasing
  rebasing 2:b5c5ea414030 "d1" (d1)
  rebasing 3:f4a0a8d004cc "d2" (d2)
  rebasing 4:777940761eba "d3" (d3)
#if obsstore-off
  $ hg bookmark
     d1                        4:c4b449ef030e
   * d2                        5:c9dd00ab36a3
     d3                        6:19f476bc865c
     r1                        0:a61bcde8c529
     r2                        3:00eebaf8d2e2
  $ hg glog -p
  o  6:19f476bc865c d3 d3
  |  diff --git a/d b/d
  |  --- a/d
  |  +++ b/d
  |  @@ -2,0 +3,1 @@
  |  +3
  |
  @  5:c9dd00ab36a3 d2 d2
  |  diff --git a/d b/d
  |  --- a/d
  |  +++ b/d
  |  @@ -1,0 +2,1 @@
  |  +2
  |
  o  4:c4b449ef030e d1 d1
  |  diff --git a/d b/d
  |  new file mode 100644
  |  --- /dev/null
  |  +++ b/d
  |  @@ -0,0 +1,1 @@
  |  +d
  |
  o  3:00eebaf8d2e2 split 3 r2
  |  diff --git a/a b/a
  |  --- a/a
  |  +++ b/a
  |  @@ -1,1 +1,1 @@
  |  -1
  |  +11
  |
  o  2:a09ad58faae3 split 2
  |  diff --git a/a b/a
  |  --- a/a
  |  +++ b/a
  |  @@ -3,1 +3,1 @@
  |  -3
  |  +33
  |
  o  1:e704349bd21b split 1
  |  diff --git a/a b/a
  |  --- a/a
  |  +++ b/a
  |  @@ -5,1 +5,1 @@
  |  -5
  |  +55
  |
  o  0:a61bcde8c529 a1 r1
     diff --git a/a b/a
     new file mode 100644
     --- /dev/null
     +++ b/a
     @@ -0,0 +1,5 @@
     +1
     +2
     +3
     +4
     +5
  
#else
  $ hg bookmark
     d1                        8:c4b449ef030e
   * d2                        9:c9dd00ab36a3
     d3                        10:19f476bc865c
     r1                        0:a61bcde8c529
     r2                        7:00eebaf8d2e2
  $ hg glog
  o  10:19f476bc865c d3 d3
  |
  @  9:c9dd00ab36a3 d2 d2
  |
  o  8:c4b449ef030e d1 d1
  |
  o  7:00eebaf8d2e2 split 3 r2
  |
  o  6:a09ad58faae3 split 2
  |
  o  5:e704349bd21b split 1
  |
  o  0:a61bcde8c529 a1 r1
  
#endif

Split a non-head without rebase

  $ cd $TESTTMP/d
#if obsstore-off
  $ runsplit -r 1 --no-rebase
  abort: cannot split changeset with children
  [255]
#else
  $ runsplit -r 1 --no-rebase >/dev/null
  3 new orphan changesets
  $ hg bookmark
     d1                        2:b5c5ea414030
   * d2                        3:f4a0a8d004cc
     d3                        4:777940761eba
     r1                        0:a61bcde8c529
     r2                        7:00eebaf8d2e2

  $ hg glog
  o  7:00eebaf8d2e2 split 3 r2
  |
  o  6:a09ad58faae3 split 2
  |
  o  5:e704349bd21b split 1
  |
  | *  4:777940761eba d3 d3
  | |
  | @  3:f4a0a8d004cc d2 d2
  | |
  | *  2:b5c5ea414030 d1 d1
  | |
  | x  1:1df0d5c5a3ab a2
  |/
  o  0:a61bcde8c529 a1 r1
  
#endif

Split a non-head with obsoleted descendants

#if obsstore-on
  $ hg init $TESTTMP/e
  $ cd $TESTTMP/e
  $ hg debugdrawdag <<'EOS'
  >   H I   J
  >   | |   |
  >   F G1 G2  # amend: G1 -> G2
  >   | |  /   # prune: F
  >   C D E
  >    \|/
  >     B
  >     |
  >     A
  > EOS
  2 new orphan changesets
  $ eval `hg tags -T '{tag}={node}\n'`
  $ rm .hg/localtags
  $ hg split $B --config experimental.evolution=createmarkers
  abort: cannot split changeset with children
  [255]
  $ cat > $TESTTMP/messages <<EOF
  > Split B
  > EOF
  $ cat <<EOF | hg split $B
  > y
  > y
  > EOF
  diff --git a/B b/B
  new file mode 100644
  examine changes to 'B'?
  (enter ? for help) [Ynesfdaq?] y
  
  @@ -0,0 +1,1 @@
  +B
  \ No newline at end of file
  record this change to 'B'?
  (enter ? for help) [Ynesfdaq?] y
  
  EDITOR: HG: Splitting 112478962961. Write commit message for the first split changeset.
  EDITOR: B
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: added B
  created new head
  rebasing 2:26805aba1e60 "C"
  rebasing 3:be0ef73c17ad "D"
  rebasing 4:49cb92066bfd "E"
  rebasing 7:97a6268cc7ef "G2"
  rebasing 10:e2f1e425c0db "J"
  $ hg glog -r 'sort(all(), topo)'
  o  16:556c085f8b52 J
  |
  o  15:8761f6c9123f G2
  |
  o  14:a7aeffe59b65 E
  |
  | o  13:e1e914ede9ab D
  |/
  | o  12:01947e9b98aa C
  |/
  o  11:0947baa74d47 Split B
  |
  | *  9:88ede1d5ee13 I
  | |
  | x  6:af8cbf225b7b G1
  | |
  | x  3:be0ef73c17ad D
  | |
  | | *  8:74863e5b5074 H
  | | |
  | | x  5:ee481a2a1e69 F
  | | |
  | | x  2:26805aba1e60 C
  | |/
  | x  1:112478962961 B
  |/
  o  0:426bada5c675 A
  
#endif

Preserve secret phase in split

  $ cp -R $TESTTMP/clean $TESTTMP/phases1
  $ cd $TESTTMP/phases1
  $ hg phase --secret -fr tip
  $ hg log -T '{short(node)} {phase}\n'
  1df0d5c5a3ab secret
  a61bcde8c529 draft
  $ runsplit tip >/dev/null
  $ hg log -T '{short(node)} {phase}\n'
  00eebaf8d2e2 secret
  a09ad58faae3 secret
  e704349bd21b secret
  a61bcde8c529 draft

Do not move things to secret even if phases.new-commit=secret

  $ cp -R $TESTTMP/clean $TESTTMP/phases2
  $ cd $TESTTMP/phases2
  $ cat >> .hg/hgrc <<EOF
  > [phases]
  > new-commit=secret
  > EOF
  $ hg log -T '{short(node)} {phase}\n'
  1df0d5c5a3ab draft
  a61bcde8c529 draft
  $ runsplit tip >/dev/null
  $ hg log -T '{short(node)} {phase}\n'
  00eebaf8d2e2 draft
  a09ad58faae3 draft
  e704349bd21b draft
  a61bcde8c529 draft

`hg split` with ignoreblanklines=1 does not infinite loop

  $ mkdir $TESTTMP/f
  $ hg init $TESTTMP/f/a
  $ cd $TESTTMP/f/a
  $ printf '1\n2\n3\n4\n5\n' > foo
  $ cp foo bar
  $ hg ci -qAm initial
  $ printf '1\n\n2\n3\ntest\n4\n5\n' > bar
  $ printf '1\n2\n3\ntest\n4\n5\n' > foo
  $ hg ci -qm splitme
  $ cat > $TESTTMP/messages <<EOF
  > split 1
  > --
  > split 2
  > EOF
  $ printf 'f\nn\nf\n' | hg --config extensions.split= --config diff.ignoreblanklines=1 split
  diff --git a/bar b/bar
  2 hunks, 2 lines changed
  examine changes to 'bar'?
  (enter ? for help) [Ynesfdaq?] f
  
  diff --git a/foo b/foo
  1 hunks, 1 lines changed
  examine changes to 'foo'?
  (enter ? for help) [Ynesfdaq?] n
  
  EDITOR: HG: Splitting dd3c45017cbf. Write commit message for the first split changeset.
  EDITOR: splitme
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed bar
  created new head
  diff --git a/foo b/foo
  1 hunks, 1 lines changed
  examine changes to 'foo'?
  (enter ? for help) [Ynesfdaq?] f
  
  EDITOR: HG: Splitting dd3c45017cbf. So far it has been split into:
  EDITOR: HG: - f205aea1c624: split 1
  EDITOR: HG: Write commit message for the next split changeset.
  EDITOR: splitme
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed foo
  saved backup bundle to $TESTTMP/f/a/.hg/strip-backup/dd3c45017cbf-463441b5-split.hg (obsstore-off !)

Let's try that again, with a slightly different set of patches, to ensure that
the ignoreblanklines thing isn't somehow position dependent.

  $ hg init $TESTTMP/f/b
  $ cd $TESTTMP/f/b
  $ printf '1\n2\n3\n4\n5\n' > foo
  $ cp foo bar
  $ hg ci -qAm initial
  $ printf '1\n2\n3\ntest\n4\n5\n' > bar
  $ printf '1\n2\n3\ntest\n4\n\n5\n' > foo
  $ hg ci -qm splitme
  $ cat > $TESTTMP/messages <<EOF
  > split 1
  > --
  > split 2
  > EOF
  $ printf 'f\nn\nf\n' | hg --config extensions.split= --config diff.ignoreblanklines=1 split
  diff --git a/bar b/bar
  1 hunks, 1 lines changed
  examine changes to 'bar'?
  (enter ? for help) [Ynesfdaq?] f
  
  diff --git a/foo b/foo
  2 hunks, 2 lines changed
  examine changes to 'foo'?
  (enter ? for help) [Ynesfdaq?] n
  
  EDITOR: HG: Splitting 904c80b40a4a. Write commit message for the first split changeset.
  EDITOR: splitme
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed bar
  created new head
  diff --git a/foo b/foo
  2 hunks, 2 lines changed
  examine changes to 'foo'?
  (enter ? for help) [Ynesfdaq?] f
  
  EDITOR: HG: Splitting 904c80b40a4a. So far it has been split into:
  EDITOR: HG: - ffecf40fa954: split 1
  EDITOR: HG: Write commit message for the next split changeset.
  EDITOR: splitme
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed foo
  saved backup bundle to $TESTTMP/f/b/.hg/strip-backup/904c80b40a4a-47fb907f-split.hg (obsstore-off !)


Testing the case in split when commiting flag-only file changes (issue5864)
---------------------------------------------------------------------------
  $ hg init $TESTTMP/issue5864
  $ cd $TESTTMP/issue5864
  $ echo foo > foo
  $ hg add foo
  $ hg ci -m "initial"
  $ hg import -q --bypass -m "make executable" - <<EOF
  > diff --git a/foo b/foo
  > old mode 100644
  > new mode 100755
  > EOF
  $ hg up -q

  $ hg glog
  @  1:3a2125f0f4cb make executable
  |
  o  0:51f273a58d82 initial
  

#if no-windows
  $ cat > $TESTTMP/messages <<EOF
  > split 1
  > EOF
  $ printf 'y\n' | hg split
  diff --git a/foo b/foo
  old mode 100644
  new mode 100755
  examine changes to 'foo'?
  (enter ? for help) [Ynesfdaq?] y
  
  EDITOR: HG: Splitting 3a2125f0f4cb. Write commit message for the first split changeset.
  EDITOR: make executable
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed foo
  created new head
  saved backup bundle to $TESTTMP/issue5864/.hg/strip-backup/3a2125f0f4cb-629e4432-split.hg (obsstore-off !)

  $ hg log -G -T "{node|short} {desc}\n"
  @  b154670c87da split 1
  |
  o  51f273a58d82 initial
  
#else

TODO: Fix this on Windows. See issue 2020 and 5883

  $ printf 'y\ny\ny\n' | hg split
  abort: cannot split an empty revision
  [255]
#endif

Test that splitting moves works properly (issue5723)
----------------------------------------------------

  $ hg init $TESTTMP/issue5723-mv
  $ cd $TESTTMP/issue5723-mv
  $ printf '1\n2\n' > file
  $ hg ci -qAm initial
  $ hg mv file file2
  $ printf 'a\nb\n1\n2\n3\n4\n' > file2
  $ cat > $TESTTMP/messages <<EOF
  > split1, keeping only the numbered lines
  > --
  > split2, keeping the lettered lines
  > EOF
  $ hg ci -m 'move and modify'
  $ printf 'y\nn\na\na\n' | hg split
  diff --git a/file b/file2
  rename from file
  rename to file2
  2 hunks, 4 lines changed
  examine changes to 'file' and 'file2'?
  (enter ? for help) [Ynesfdaq?] y
  
  @@ -0,0 +1,2 @@
  +a
  +b
  record change 1/2 to 'file2'?
  (enter ? for help) [Ynesfdaq?] n
  
  @@ -2,0 +5,2 @@ 2
  +3
  +4
  record change 2/2 to 'file2'?
  (enter ? for help) [Ynesfdaq?] a
  
  EDITOR: HG: Splitting 8c42fa635116. Write commit message for the first split changeset.
  EDITOR: move and modify
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: added file2
  EDITOR: HG: removed file
  created new head
  diff --git a/file2 b/file2
  1 hunks, 2 lines changed
  examine changes to 'file2'?
  (enter ? for help) [Ynesfdaq?] a
  
  EDITOR: HG: Splitting 8c42fa635116. So far it has been split into:
  EDITOR: HG: - 478be2a70c27: split1, keeping only the numbered lines
  EDITOR: HG: Write commit message for the next split changeset.
  EDITOR: move and modify
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed file2
  saved backup bundle to $TESTTMP/issue5723-mv/.hg/strip-backup/8c42fa635116-a38044d4-split.hg (obsstore-off !)
  $ hg log -T '{desc}: {files%"{file} "}\n'
  split2, keeping the lettered lines: file2 
  split1, keeping only the numbered lines: file file2 
  initial: file 
  $ cat file2
  a
  b
  1
  2
  3
  4
  $ hg cat -r ".^" file2
  1
  2
  3
  4
  $ hg cat -r . file2
  a
  b
  1
  2
  3
  4


Test that splitting copies works properly (issue5723)
----------------------------------------------------

  $ hg init $TESTTMP/issue5723-cp
  $ cd $TESTTMP/issue5723-cp
  $ printf '1\n2\n' > file
  $ hg ci -qAm initial
  $ hg cp file file2
  $ printf 'a\nb\n1\n2\n3\n4\n' > file2
Also modify 'file' to prove that the changes aren't being pulled in
accidentally.
  $ printf 'this is the new contents of "file"' > file
  $ cat > $TESTTMP/messages <<EOF
  > split1, keeping "file" and only the numbered lines in file2
  > --
  > split2, keeping the lettered lines in file2
  > EOF
  $ hg ci -m 'copy file->file2, modify both'
  $ printf 'f\ny\nn\na\na\n' | hg split
  diff --git a/file b/file
  1 hunks, 2 lines changed
  examine changes to 'file'?
  (enter ? for help) [Ynesfdaq?] f
  
  diff --git a/file b/file2
  copy from file
  copy to file2
  2 hunks, 4 lines changed
  examine changes to 'file' and 'file2'?
  (enter ? for help) [Ynesfdaq?] y
  
  @@ -0,0 +1,2 @@
  +a
  +b
  record change 2/3 to 'file2'?
  (enter ? for help) [Ynesfdaq?] n
  
  @@ -2,0 +5,2 @@ 2
  +3
  +4
  record change 3/3 to 'file2'?
  (enter ? for help) [Ynesfdaq?] a
  
  EDITOR: HG: Splitting 41c861dfa61e. Write commit message for the first split changeset.
  EDITOR: copy file->file2, modify both
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: added file2
  EDITOR: HG: changed file
  created new head
  diff --git a/file2 b/file2
  1 hunks, 2 lines changed
  examine changes to 'file2'?
  (enter ? for help) [Ynesfdaq?] a
  
  EDITOR: HG: Splitting 41c861dfa61e. So far it has been split into:
  EDITOR: HG: - 4b19e06610eb: split1, keeping "file" and only the numbered lines in file2
  EDITOR: HG: Write commit message for the next split changeset.
  EDITOR: copy file->file2, modify both
  EDITOR: 
  EDITOR: 
  EDITOR: HG: Enter commit message.  Lines beginning with 'HG:' are removed.
  EDITOR: HG: Leave message empty to abort commit.
  EDITOR: HG: --
  EDITOR: HG: user: test
  EDITOR: HG: branch 'default'
  EDITOR: HG: changed file2
  saved backup bundle to $TESTTMP/issue5723-cp/.hg/strip-backup/41c861dfa61e-467e8d3c-split.hg (obsstore-off !)
  $ hg log -T '{desc}: {files%"{file} "}\n'
  split2, keeping the lettered lines in file2: file2 
  split1, keeping "file" and only the numbered lines in file2: file file2 
  initial: file 
  $ cat file2
  a
  b
  1
  2
  3
  4
  $ hg cat -r ".^" file2
  1
  2
  3
  4
  $ hg cat -r . file2
  a
  b
  1
  2
  3
  4