annotate tests/test-record.t @ 16324:46b991a1f428

record: allow splitting of hunks by manually editing patches

It is possible that unrelated changes in a file are on sequential lines.  The
current record extension does not allow these to be committed independently.

An example use case for this is in software development for deeply embedded
real-time systems.  In these environments, it is not always possible to use a
debugger (due to time-constraints) and hence inline UART-based printing is
often used.  When fixing a bug in a module, it is often convenient to add a
large number of 'printf's (linked to the UART via a custom fputc) to the module
in order to work out what is going wrong.  printf is a very slow function (and
also variadic so somewhat frowned upon by the MISRA standard) and hence it is
highly undesirable to commit these lines to the repository.  If only a partial
fix is implemented, however, it is desirable to commit the fix without deleting
all of the printf lines.  This is also simplifies removal of the printf lines
as once the final fix is committed, 'hg revert' does the rest.  It is likely
that the printf lines will be very near the actual fix, so being able to split
the hunk is very useful in this case.

There were two alternatives I considered for the user interface.  One was to
manually edit the patch, the other to allow a hunk to be split into individual
lines for consideration.  The latter option would require a significant
refactor of the record module and is less flexible.  While the former is
potentially more complicated to use, this is a feature that is likely to only
be used in certain exceptional cases (such as the use case proposed above) and
hence I felt that the complexity would not be a considerable issue.

I've also written a follow-up patch that refactors the 'prompt' code to base
everything on the choices variable.  This tidies up and clarifies the code a
bit (removes constructs like 'if ret == 7' and removes the 'e' option from the
file scope options as it's not relevant there.  It's not really a necessity, so
I've excluded it from this submission for now, but I can send it separately if
there's a desire and it's on bitbucket (see below) in the meantime.

Possible future improvements include:

* Tidying up the 'prompt' code to base everything on the choices variable.
  This would allow entries to be removed from the prompt as currently 'e' is
  offered even for entire file patches, which is currently unsupported.
* Allowing the entire file (or even multi-file) patch to be edited manually:
  this would require quite a large refactor without much benefit, so I decided
  to exclude it from the initial submission.
* Allow the option to retry if a patch fails to apply (this is what Git does).
  This would require quite a bit of refactoring given the current 'hg record'
  implementation, so it's debatable whether it's worth it.

Output is similar to existing record user interface except that an additional
option ('e') exists to allow manual editing of the patch.  This opens the
user's configured editor with the patch.  A comment is added to the bottom of
the patch explaining what to do (based on Git's one).

A large proportion of the changeset is test-case changes to update the options
reported by record (Ynesfdaq? instead of Ynsfdaq?).  Functional changes are in
record.py and there are some new test cases in test-record.t.

  $ "$TESTDIR/hghave" execbit || exit 80

Set up a repo

  $ echo "[ui]" >> $HGRCPATH
  $ echo "interactive=true" >> $HGRCPATH
  $ echo "[extensions]" >> $HGRCPATH
  $ echo "record=" >> $HGRCPATH

  $ hg init a
  $ cd a

Select no files

  $ touch empty-rw
  $ hg add empty-rw

  $ hg record empty-rw<<EOF
  > n
  > EOF
  diff --git a/empty-rw b/empty-rw
  new file mode 100644
  examine changes to 'empty-rw'? [Ynesfdaq?] 
  no changes to record

  $ hg tip -p
  changeset:   -1:000000000000
  tag:         tip
  user:        
  date:        Thu Jan 01 00:00:00 1970 +0000
  
  

Select files but no hunks

  $ hg record empty-rw<<EOF
  > y
  > n
  > EOF
  diff --git a/empty-rw b/empty-rw
  new file mode 100644
  examine changes to 'empty-rw'? [Ynesfdaq?] 
  abort: empty commit message
  [255]

  $ hg tip -p
  changeset:   -1:000000000000
  tag:         tip
  user:        
  date:        Thu Jan 01 00:00:00 1970 +0000
  
  

Record empty file

  $ hg record -d '0 0' -m empty empty-rw<<EOF
  > y
  > y
  > EOF
  diff --git a/empty-rw b/empty-rw
  new file mode 100644
  examine changes to 'empty-rw'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   0:c0708cf4e46e
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     empty
  
  

Summary shows we updated to the new cset

  $ hg summary
  parent: 0:c0708cf4e46e tip
   empty
  branch: default
  commit: (clean)
  update: (current)

Rename empty file

  $ hg mv empty-rw empty-rename
  $ hg record -d '1 0' -m rename<<EOF
  > y
  > EOF
  diff --git a/empty-rw b/empty-rename
  rename from empty-rw
  rename to empty-rename
  examine changes to 'empty-rw' and 'empty-rename'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   1:d695e8dcb197
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:01 1970 +0000
  summary:     rename
  
  

Copy empty file

  $ hg cp empty-rename empty-copy
  $ hg record -d '2 0' -m copy<<EOF
  > y
  > EOF
  diff --git a/empty-rename b/empty-copy
  copy from empty-rename
  copy to empty-copy
  examine changes to 'empty-rename' and 'empty-copy'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   2:1d4b90bea524
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:02 1970 +0000
  summary:     copy
  
  

Delete empty file

  $ hg rm empty-copy
  $ hg record -d '3 0' -m delete<<EOF
  > y
  > EOF
  diff --git a/empty-copy b/empty-copy
  deleted file mode 100644
  examine changes to 'empty-copy'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   3:b39a238f01a1
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:03 1970 +0000
  summary:     delete
  
  

Add binary file

  $ hg bundle --base -2 tip.bundle
  1 changesets found
  $ hg add tip.bundle
  $ hg record -d '4 0' -m binary<<EOF
  > y
  > EOF
  diff --git a/tip.bundle b/tip.bundle
  new file mode 100644
  this is a binary file
  examine changes to 'tip.bundle'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   4:ad816da3711e
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:04 1970 +0000
  summary:     binary
  
  diff -r b39a238f01a1 -r ad816da3711e tip.bundle
  Binary file tip.bundle has changed
  

Change binary file

  $ hg bundle --base -2 tip.bundle
  1 changesets found
  $ hg record -d '5 0' -m binary-change<<EOF
  > y
  > EOF
  diff --git a/tip.bundle b/tip.bundle
  this modifies a binary file (all or nothing)
  examine changes to 'tip.bundle'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   5:dccd6f3eb485
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:05 1970 +0000
  summary:     binary-change
  
  diff -r ad816da3711e -r dccd6f3eb485 tip.bundle
  Binary file tip.bundle has changed
  

Rename and change binary file

  $ hg mv tip.bundle top.bundle
  $ hg bundle --base -2 top.bundle
  1 changesets found
  $ hg record -d '6 0' -m binary-change-rename<<EOF
  > y
  > EOF
  diff --git a/tip.bundle b/top.bundle
  rename from tip.bundle
  rename to top.bundle
  this modifies a binary file (all or nothing)
  examine changes to 'tip.bundle' and 'top.bundle'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   6:7fa44105f5b3
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:06 1970 +0000
  summary:     binary-change-rename
  
  diff -r dccd6f3eb485 -r 7fa44105f5b3 tip.bundle
  Binary file tip.bundle has changed
  diff -r dccd6f3eb485 -r 7fa44105f5b3 top.bundle
  Binary file top.bundle has changed
  

Add plain file

  $ for i in 1 2 3 4 5 6 7 8 9 10; do
  >     echo $i >> plain
  > done

  $ hg add plain
  $ hg record -d '7 0' -m plain plain<<EOF
  > y
  > y
  > EOF
  diff --git a/plain b/plain
  new file mode 100644
  examine changes to 'plain'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   7:11fb457c1be4
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:07 1970 +0000
  summary:     plain
  
  diff -r 7fa44105f5b3 -r 11fb457c1be4 plain
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/plain	Thu Jan 01 00:00:07 1970 +0000
  @@ -0,0 +1,10 @@
  +1
  +2
  +3
  +4
  +5
  +6
  +7
  +8
  +9
  +10
  

Modify end of plain file

  $ echo 11 >> plain
  $ hg record -d '8 0' -m end plain <<EOF
  > y
  > y
  > EOF
  diff --git a/plain b/plain
  1 hunks, 1 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -8,3 +8,4 @@
   8
   9
   10
  +11
  record this change to 'plain'? [Ynesfdaq?] 

Modify end of plain file, no EOL

  $ hg tip --template '{node}' >> plain
  $ hg record -d '9 0' -m noeol plain <<EOF
  > y
  > y
  > EOF
  diff --git a/plain b/plain
  1 hunks, 1 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -9,3 +9,4 @@
   9
   10
   11
  +7264f99c5f5ff3261504828afa4fb4d406c3af54
  \ No newline at end of file
  record this change to 'plain'? [Ynesfdaq?] 

Modify end of plain file, add EOL

  $ echo >> plain
  $ echo 1 > plain2
  $ hg add plain2
  $ hg record -d '10 0' -m eol plain plain2 <<EOF
  > y
  > y
  > y
  > EOF
  diff --git a/plain b/plain
  1 hunks, 1 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -9,4 +9,4 @@
   9
   10
   11
  -7264f99c5f5ff3261504828afa4fb4d406c3af54
  \ No newline at end of file
  +7264f99c5f5ff3261504828afa4fb4d406c3af54
  record change 1/2 to 'plain'? [Ynesfdaq?] 
  diff --git a/plain2 b/plain2
  new file mode 100644
  examine changes to 'plain2'? [Ynesfdaq?] 

Modify beginning, trim end, record both, add another file to test
changes numbering

  $ rm plain
  $ for i in 2 2 3 4 5 6 7 8 9 10; do
  >   echo $i >> plain
  > done
  $ echo 2 >> plain2

  $ hg record -d '10 0' -m begin-and-end plain plain2 <<EOF
  > y
  > y
  > y
  > y
  > y
  > EOF
  diff --git a/plain b/plain
  2 hunks, 3 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -1,4 +1,4 @@
  -1
  +2
   2
   3
   4
  record change 1/3 to 'plain'? [Ynesfdaq?] 
  @@ -8,5 +8,3 @@
   8
   9
   10
  -11
  -7264f99c5f5ff3261504828afa4fb4d406c3af54
  record change 2/3 to 'plain'? [Ynesfdaq?] 
  diff --git a/plain2 b/plain2
  1 hunks, 1 lines changed
  examine changes to 'plain2'? [Ynesfdaq?] 
  @@ -1,1 +1,2 @@
   1
  +2
  record change 3/3 to 'plain2'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   11:21df83db12b8
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:10 1970 +0000
  summary:     begin-and-end
  
  diff -r ddb8b281c3ff -r 21df83db12b8 plain
  --- a/plain	Thu Jan 01 00:00:10 1970 +0000
  +++ b/plain	Thu Jan 01 00:00:10 1970 +0000
  @@ -1,4 +1,4 @@
  -1
  +2
   2
   3
   4
  @@ -8,5 +8,3 @@
   8
   9
   10
  -11
  -7264f99c5f5ff3261504828afa4fb4d406c3af54
  diff -r ddb8b281c3ff -r 21df83db12b8 plain2
  --- a/plain2	Thu Jan 01 00:00:10 1970 +0000
  +++ b/plain2	Thu Jan 01 00:00:10 1970 +0000
  @@ -1,1 +1,2 @@
   1
  +2
  

Trim beginning, modify end

  $ rm plain
  > for i in 4 5 6 7 8 9 10.new; do
  >   echo $i >> plain
  > done

Record end

  $ hg record -d '11 0' -m end-only plain <<EOF
  > y
  > n
  > y
  > EOF
  diff --git a/plain b/plain
  2 hunks, 4 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -1,9 +1,6 @@
  -2
  -2
  -3
   4
   5
   6
   7
   8
   9
  record change 1/2 to 'plain'? [Ynesfdaq?] 
  @@ -4,7 +1,7 @@
   4
   5
   6
   7
   8
   9
  -10
  +10.new
  record change 2/2 to 'plain'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   12:99337501826f
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:11 1970 +0000
  summary:     end-only
  
  diff -r 21df83db12b8 -r 99337501826f plain
  --- a/plain	Thu Jan 01 00:00:10 1970 +0000
  +++ b/plain	Thu Jan 01 00:00:11 1970 +0000
  @@ -7,4 +7,4 @@
   7
   8
   9
  -10
  +10.new
  

Record beginning

  $ hg record -d '12 0' -m begin-only plain <<EOF
  > y
  > y
  > EOF
  diff --git a/plain b/plain
  1 hunks, 3 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -1,6 +1,3 @@
  -2
  -2
  -3
   4
   5
   6
  record this change to 'plain'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   13:bbd45465d540
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:12 1970 +0000
  summary:     begin-only
  
  diff -r 99337501826f -r bbd45465d540 plain
  --- a/plain	Thu Jan 01 00:00:11 1970 +0000
  +++ b/plain	Thu Jan 01 00:00:12 1970 +0000
  @@ -1,6 +1,3 @@
  -2
  -2
  -3
   4
   5
   6
  

Add to beginning, trim from end

  $ rm plain
  $ for i in 1 2 3 4 5 6 7 8 9; do
  >  echo $i >> plain
  > done

Record end

  $ hg record --traceback -d '13 0' -m end-again plain<<EOF
  > y
  > n
  > y
  > EOF
  diff --git a/plain b/plain
  2 hunks, 4 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -1,6 +1,9 @@
  +1
  +2
  +3
   4
   5
   6
   7
   8
   9
  record change 1/2 to 'plain'? [Ynesfdaq?] 
  @@ -1,7 +4,6 @@
   4
   5
   6
   7
   8
   9
  -10.new
  record change 2/2 to 'plain'? [Ynesfdaq?] 

Add to beginning, middle, end

  $ rm plain
  $ for i in 1 2 3 4 5 5.new 5.reallynew 6 7 8 9 10 11; do
  >   echo $i >> plain
  > done

Record beginning, middle

  $ hg record -d '14 0' -m middle-only plain <<EOF
  > y
  > y
  > y
  > n
  > EOF
  diff --git a/plain b/plain
  3 hunks, 7 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -1,2 +1,5 @@
  +1
  +2
  +3
   4
   5
  record change 1/3 to 'plain'? [Ynesfdaq?] 
  @@ -1,6 +4,8 @@
   4
   5
  +5.new
  +5.reallynew
   6
   7
   8
   9
  record change 2/3 to 'plain'? [Ynesfdaq?] 
  @@ -3,4 +8,6 @@
   6
   7
   8
   9
  +10
  +11
  record change 3/3 to 'plain'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   15:f34a7937ec33
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:14 1970 +0000
  summary:     middle-only
  
  diff -r 82c065d0b850 -r f34a7937ec33 plain
  --- a/plain	Thu Jan 01 00:00:13 1970 +0000
  +++ b/plain	Thu Jan 01 00:00:14 1970 +0000
  @@ -1,5 +1,10 @@
  +1
  +2
  +3
   4
   5
  +5.new
  +5.reallynew
   6
   7
   8
  

Record end

  $ hg record -d '15 0' -m end-only plain <<EOF
  > y
  > y
  > EOF
  diff --git a/plain b/plain
  1 hunks, 2 lines changed
  examine changes to 'plain'? [Ynesfdaq?] 
  @@ -9,3 +9,5 @@
   7
   8
   9
  +10
  +11
  record this change to 'plain'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   16:f9900b71a04c
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:15 1970 +0000
  summary:     end-only
  
  diff -r f34a7937ec33 -r f9900b71a04c plain
  --- a/plain	Thu Jan 01 00:00:14 1970 +0000
  +++ b/plain	Thu Jan 01 00:00:15 1970 +0000
  @@ -9,3 +9,5 @@
   7
   8
   9
  +10
  +11
  

  $ mkdir subdir
  $ cd subdir
  $ echo a > a
  $ hg ci -d '16 0' -Amsubdir
  adding subdir/a

  $ echo a >> a
  $ hg record -d '16 0' -m subdir-change a <<EOF
  > y
  > y
  > EOF
  diff --git a/subdir/a b/subdir/a
  1 hunks, 1 lines changed
  examine changes to 'subdir/a'? [Ynesfdaq?] 
  @@ -1,1 +1,2 @@
   a
  +a
  record this change to 'subdir/a'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   18:61be427a9deb
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:16 1970 +0000
  summary:     subdir-change
  
  diff -r a7ffae4d61cb -r 61be427a9deb subdir/a
  --- a/subdir/a	Thu Jan 01 00:00:16 1970 +0000
  +++ b/subdir/a	Thu Jan 01 00:00:16 1970 +0000
  @@ -1,1 +1,2 @@
   a
  +a
  

  $ echo a > f1
  $ echo b > f2
  $ hg add f1 f2

  $ hg ci -mz -d '17 0'

  $ echo a >> f1
  $ echo b >> f2

Help, quit

  $ hg record <<EOF
  > ?
  > q
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  y - record this change
  n - skip this change
  e - edit this change manually
  s - skip remaining changes to this file
  f - record remaining changes to this file
  d - done, skip remaining changes and files
  a - record all changes to all remaining files
  q - quit, recording no changes
  ? - display help
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  abort: user quit
  [255]

Skip

  $ hg record <<EOF
  > s
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  diff --git a/subdir/f2 b/subdir/f2
  1 hunks, 1 lines changed
  examine changes to 'subdir/f2'? [Ynesfdaq?] abort: response expected
  [255]

No

  $ hg record <<EOF
  > n
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  diff --git a/subdir/f2 b/subdir/f2
  1 hunks, 1 lines changed
  examine changes to 'subdir/f2'? [Ynesfdaq?] abort: response expected
  [255]

f, quit

  $ hg record <<EOF
  > f
  > q
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  diff --git a/subdir/f2 b/subdir/f2
  1 hunks, 1 lines changed
  examine changes to 'subdir/f2'? [Ynesfdaq?] 
  abort: user quit
  [255]

s, all

  $ hg record -d '18 0' -mx <<EOF
  > s
  > a
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  diff --git a/subdir/f2 b/subdir/f2
  1 hunks, 1 lines changed
  examine changes to 'subdir/f2'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   20:b3df3dda369a
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:18 1970 +0000
  summary:     x
  
  diff -r 6e02d6c9906d -r b3df3dda369a subdir/f2
  --- a/subdir/f2	Thu Jan 01 00:00:17 1970 +0000
  +++ b/subdir/f2	Thu Jan 01 00:00:18 1970 +0000
  @@ -1,1 +1,2 @@
   b
  +b
  

f

  $ hg record -d '19 0' -my <<EOF
  > f
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   21:38ec577f126b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:19 1970 +0000
  summary:     y
  
  diff -r b3df3dda369a -r 38ec577f126b subdir/f1
  --- a/subdir/f1	Thu Jan 01 00:00:18 1970 +0000
  +++ b/subdir/f1	Thu Jan 01 00:00:19 1970 +0000
  @@ -1,1 +1,2 @@
   a
  +a
  

Preserve chmod +x

  $ chmod +x f1
  $ echo a >> f1
  $ hg record -d '20 0' -mz <<EOF
  > y
  > y
  > y
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  old mode 100644
  new mode 100755
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  @@ -1,2 +1,3 @@
   a
   a
  +a
  record this change to 'subdir/f1'? [Ynesfdaq?] 

  $ hg tip --config diff.git=True -p
  changeset:   22:3261adceb075
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:20 1970 +0000
  summary:     z
  
  diff --git a/subdir/f1 b/subdir/f1
  old mode 100644
  new mode 100755
  --- a/subdir/f1
  +++ b/subdir/f1
  @@ -1,2 +1,3 @@
   a
   a
  +a
  

Preserve execute permission on original

  $ echo b >> f1
  $ hg record -d '21 0' -maa <<EOF
  > y
  > y
  > y
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  @@ -1,3 +1,4 @@
   a
   a
   a
  +b
  record this change to 'subdir/f1'? [Ynesfdaq?] 

  $ hg tip --config diff.git=True -p
  changeset:   23:b429867550db
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:21 1970 +0000
  summary:     aa
  
  diff --git a/subdir/f1 b/subdir/f1
  --- a/subdir/f1
  +++ b/subdir/f1
  @@ -1,3 +1,4 @@
   a
   a
   a
  +b
  

Preserve chmod -x

  $ chmod -x f1
  $ echo c >> f1
  $ hg record -d '22 0' -mab <<EOF
  > y
  > y
  > y
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  old mode 100755
  new mode 100644
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  @@ -2,3 +2,4 @@
   a
   a
   b
  +c
  record this change to 'subdir/f1'? [Ynesfdaq?] 

  $ hg tip --config diff.git=True -p
  changeset:   24:0b082130c20a
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:22 1970 +0000
  summary:     ab
  
  diff --git a/subdir/f1 b/subdir/f1
  old mode 100755
  new mode 100644
  --- a/subdir/f1
  +++ b/subdir/f1
  @@ -2,3 +2,4 @@
   a
   a
   b
  +c
  

  $ cd ..

Abort early when a merge is in progress

  $ hg up 4
  1 files updated, 0 files merged, 6 files removed, 0 files unresolved

  $ touch iwillmergethat
  $ hg add iwillmergethat

  $ hg branch thatbranch
  marked working directory as branch thatbranch
  (branches are permanent and global, did you want a bookmark?)

  $ hg ci -m'new head'

  $ hg up default
  6 files updated, 0 files merged, 2 files removed, 0 files unresolved

  $ hg merge thatbranch
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg record -m'will abort'
  abort: cannot partially commit a merge (use "hg commit" instead)
  [255]

  $ hg up -C
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

Editing patch

  $ cat > editor << '__EOF__'
  > #!/bin/sh
  > sed -i -e 7d -e '5s/^-/ /' "$1"
  > __EOF__
  $ chmod +x editor
  $ cat > editedfile << '__EOF__'
  > This is the first line
  > This is the second line
  > This is the third line
  > __EOF__
  $ hg add editedfile
  $ hg commit -medit-patch-1
  $ cat > editedfile << '__EOF__'
  > This line has changed
  > This change will be committed
  > This is the third line
  > __EOF__
  $ HGEDITOR="'`pwd`'"/editor hg record -d '23 0' -medit-patch-2 <<EOF
  > y
  > e
  > EOF
  diff --git a/editedfile b/editedfile
  1 hunks, 2 lines changed
  examine changes to 'editedfile'? [Ynesfdaq?] 
  @@ -1,3 +1,3 @@
  -This is the first line
  -This is the second line
  +This line has changed
  +This change will be committed
   This is the third line
  record this change to 'editedfile'? [Ynesfdaq?] 
  $ cat editedfile
  This line has changed
  This change will be committed
  This is the third line
  $ hg cat -r tip editedfile
  This is the first line
  This change will be committed
  This is the third line
  $ hg revert editedfile

Trying to edit patch for whole file

  $ echo "This is the fourth line" >> editedfile
  $ hg record <<EOF
  > e
  > q
  > EOF
  diff --git a/editedfile b/editedfile
  1 hunks, 1 lines changed
  examine changes to 'editedfile'? [Ynesfdaq?] 
  cannot edit patch for whole file
  examine changes to 'editedfile'? [Ynesfdaq?] 
  abort: user quit
  [255]
  $ hg revert editedfile

Removing changes from patch

  $ sed -i -e '3s/third/second/' -e '2s/will/will not/' -e 1d editedfile
  $ echo "This line has been added" >> editedfile
  $ cat > editor << '__EOF__'
  > #!/bin/sh
  > sed -i -e 's/^[-+]/ /' "$1"
  > __EOF__
  $ chmod +x editor
  $ HGEDITOR="'`pwd`'"/editor hg record <<EOF
  > y
  > e
  > EOF
  diff --git a/editedfile b/editedfile
  1 hunks, 3 lines changed
  examine changes to 'editedfile'? [Ynesfdaq?] 
  @@ -1,3 +1,3 @@
  -This is the first line
  -This change will be committed
  -This is the third line
  +This change will not be committed
  +This is the second line
  +This line has been added
  record this change to 'editedfile'? [Ynesfdaq?] 
  no changes to record
  $ cat editedfile
  This change will not be committed
  This is the second line
  This line has been added
  $ hg cat -r tip editedfile
  This is the first line
  This change will be committed
  This is the third line
  $ hg revert editedfile

Invalid patch

  $ sed -i -e '3s/third/second/' -e '2s/will/will not/' -e 1d editedfile
  $ echo "This line has been added" >> editedfile
  $ cat > editor << '__EOF__'
  > #!/bin/sh
  > sed -i s/This/That/ "$1"
  > __EOF__
  $ chmod +x editor
  $ HGEDITOR="'`pwd`'"/editor hg record <<EOF
  > y
  > e
  > EOF
  diff --git a/editedfile b/editedfile
  1 hunks, 3 lines changed
  examine changes to 'editedfile'? [Ynesfdaq?] 
  @@ -1,3 +1,3 @@
  -This is the first line
  -This change will be committed
  -This is the third line
  +This change will not be committed
  +This is the second line
  +This line has been added
  record this change to 'editedfile'? [Ynesfdaq?] 
  patching file editedfile
  Hunk #1 FAILED at 0
  1 out of 1 hunks FAILED -- saving rejects to file editedfile.rej
  abort: patch failed to apply
  [255]
  $ cat editedfile
  This change will not be committed
  This is the second line
  This line has been added
  $ hg cat -r tip editedfile
  This is the first line
  This change will be committed
  This is the third line
  $ cat editedfile.rej
  --- editedfile
  +++ editedfile
  @@ -1,3 +1,3 @@
  -That is the first line
  -That change will be committed
  -That is the third line
  +That change will not be committed
  +That is the second line
  +That line has been added
  $ hg up -C
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

With win32text

  $ echo '[extensions]' >> .hg/hgrc
  $ echo 'win32text = ' >> .hg/hgrc
  $ echo '[decode]' >> .hg/hgrc
  $ echo '** = cleverdecode:' >> .hg/hgrc
  $ echo '[encode]' >> .hg/hgrc
  $ echo '** = cleverencode:' >> .hg/hgrc
  $ echo '[patch]' >> .hg/hgrc
  $ echo 'eol = crlf' >> .hg/hgrc

Ignore win32text deprecation warning for now:

  $ echo '[win32text]' >> .hg/hgrc
  $ echo 'warn = no' >> .hg/hgrc

  $ echo d >> subdir/f1
  $ hg record -d '24 0' -mw1 <<EOF
  > y
  > y
  > EOF
  diff --git a/subdir/f1 b/subdir/f1
  1 hunks, 1 lines changed
  examine changes to 'subdir/f1'? [Ynesfdaq?] 
  @@ -3,3 +3,4 @@
   a
   b
   c
  +d
  record this change to 'subdir/f1'? [Ynesfdaq?] 

  $ hg tip -p
  changeset:   28:287ad1f41a72
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:24 1970 +0000
  summary:     w1
  
  diff -r 65ce23a81197 -r 287ad1f41a72 subdir/f1
  --- a/subdir/f1	Thu Jan 01 00:00:23 1970 +0000
  +++ b/subdir/f1	Thu Jan 01 00:00:24 1970 +0000
  @@ -3,3 +3,4 @@
   a
   b
   c
  +d