log: add a status template

It appears that git users like having a --name-status option on `git
log`. There exist at least three questions on StackOverflow on how to
do this for hg. The desired output is not difficult to build with
templates, and since this is something that svn users might also want,
it seems desirable to have this as another standard template.

This mimics the output of `hg status` and adds it to the log output.
It also follows status's convention of displaying copies with a -C
option. Brief example:

    $ hg log -T status -C
    changeset:   24883:7d1b9b7ac9fd
    bookmark:    statustemplate
    tag:         tip
    parent:      24864:c560d8c68791
    user:        Jordi Gutiérrez Hermoso <[e-mail]>
    date:        Wed Apr 22 14:05:04 2015 -0400
    summary:     log: add a status template
    files:
    A added
    A copied
      original
    M modified
    R removed

Of course, everything is also coloured correctly, and there are tests
to prove it.

mercurial/templates/map-cmdline.status

@@ -0,0 +1,25 b''
+%include map-cmdline.default
+
+# Override base templates
+changeset = '{cset}{branches}{bookmarks}{tags}{parents}{user}{ldate}{summary}{lfiles}\n'
+changeset_verbose = '{cset}{branches}{bookmarks}{tags}{parents}{user}{ldate}{description}{lfiles}\n'
+changeset_debug = '{fullcset}{branches}{bookmarks}{tags}{lphase}{parents}{manifest}{user}{ldate}{extras}{description}{lfiles}\n'
+
+# Override the file templates
+lfiles = '{if(files,
+              label('ui.note log.files',
+                    'files:\n'))}{lfile_mods}{lfile_adds}{lfile_copies_switch}{lfile_dels}'
+
+# Exclude copied files, will display those in lfile_copies_switch
+lfile_adds  = '{file_adds % "{ifcontains(file, file_copies_switch,
+                                         '',
+                                         '{lfile_add}')}"}'
+lfile_add = '{label("status.added", "A {file}\n")}'
+
+lfile_copies_switch = '{file_copies_switch % "{lfile_copy_orig}{lfile_copy_dest}"'
+lfile_copy_orig = '{label("status.added", "A {name}\n")}'
+lfile_copy_dest = '{label("status.copied", "  {source}\n")}'
+
+lfile_mods = '{file_mods % "{label('status.modified', 'M {file}\n')}"}'
+
+lfile_dels = '{file_dels % "{label('status.removed', 'R {file}\n')}"}'

tests/test-command-template.t

@@ -992,11 +992,11 b' Error if no style:'
 
   $ hg log --style notexist
   abort: style 'notexist' not found
-  (available styles: bisect, changelog, compact, default, phases, xml)
+  (available styles: bisect, changelog, compact, default, phases, status, xml)
   [255]
 
   $ hg log -T list
-  available styles: bisect, changelog, compact, default, phases, xml
+  available styles: bisect, changelog, compact, default, phases, status, xml
   abort: specify a template
   [255]
 
@@ -2013,6 +2013,147 b' Add a commit that does all possible modi'
   $ hg rm a
   $ hg ci -m "Modify, add, remove, rename"
 
+Check the status template
+
+  $ cat <<EOF >> $HGRCPATH
+  > [extensions]
+  > color=
+  > EOF
+
+  $ hg log -T status -r 10
+  changeset:   10:0f9759ec227a
+  tag:         tip
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     Modify, add, remove, rename
+  files:
+  M third
+  A b
+  A fifth
+  R a
+  R fourth
+  
+  $ hg log -T status -C -r 10
+  changeset:   10:0f9759ec227a
+  tag:         tip
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     Modify, add, remove, rename
+  files:
+  M third
+  A b
+  A fifth
+    fourth
+  R a
+  R fourth
+  
+  $ hg log -T status -C -r 10 -v
+  changeset:   10:0f9759ec227a
+  tag:         tip
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  description:
+  Modify, add, remove, rename
+  
+  files:
+  M third
+  A b
+  A fifth
+    fourth
+  R a
+  R fourth
+  
+  $ hg log -T status -C -r 10 --debug
+  changeset:   10:0f9759ec227a4859c2014a345cd8a859022b7c6c
+  tag:         tip
+  phase:       secret
+  parent:      9:bf9dfba36635106d6a73ccc01e28b762da60e066
+  parent:      -1:0000000000000000000000000000000000000000
+  manifest:    8:89dd546f2de0a9d6d664f58d86097eb97baba567
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  extra:       branch=default
+  description:
+  Modify, add, remove, rename
+  
+  files:
+  M third
+  A b
+  A fifth
+    fourth
+  R a
+  R fourth
+  
+  $ hg log -T status -C -r 10 --quiet
+  10:0f9759ec227a
+  $ hg --color=debug log -T status -r 10
+  [log.changeset changeset.secret|changeset:   10:0f9759ec227a]
+  [log.tag|tag:         tip]
+  [log.user|user:        test]
+  [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
+  [log.summary|summary:     Modify, add, remove, rename]
+  [ui.note log.files|files:]
+  [status.modified|M third]
+  [status.added|A b]
+  [status.added|A fifth]
+  [status.removed|R a]
+  [status.removed|R fourth]
+  
+  $ hg --color=debug log -T status -C -r 10
+  [log.changeset changeset.secret|changeset:   10:0f9759ec227a]
+  [log.tag|tag:         tip]
+  [log.user|user:        test]
+  [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
+  [log.summary|summary:     Modify, add, remove, rename]
+  [ui.note log.files|files:]
+  [status.modified|M third]
+  [status.added|A b]
+  [status.added|A fifth]
+  [status.copied|  fourth]
+  [status.removed|R a]
+  [status.removed|R fourth]
+  
+  $ hg --color=debug log -T status -C -r 10 -v
+  [log.changeset changeset.secret|changeset:   10:0f9759ec227a]
+  [log.tag|tag:         tip]
+  [log.user|user:        test]
+  [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
+  [ui.note log.description|description:]
+  [ui.note log.description|Modify, add, remove, rename]
+  
+  [ui.note log.files|files:]
+  [status.modified|M third]
+  [status.added|A b]
+  [status.added|A fifth]
+  [status.copied|  fourth]
+  [status.removed|R a]
+  [status.removed|R fourth]
+  
+  $ hg --color=debug log -T status -C -r 10 --debug
+  [log.changeset changeset.secret|changeset:   10:0f9759ec227a4859c2014a345cd8a859022b7c6c]
+  [log.tag|tag:         tip]
+  [log.phase|phase:       secret]
+  [log.parent changeset.secret|parent:      9:bf9dfba36635106d6a73ccc01e28b762da60e066]
+  [log.parent changeset.public|parent:      -1:0000000000000000000000000000000000000000]
+  [ui.debug log.manifest|manifest:    8:89dd546f2de0a9d6d664f58d86097eb97baba567]
+  [log.user|user:        test]
+  [log.date|date:        Thu Jan 01 00:00:00 1970 +0000]
+  [ui.debug log.extra|extra:       branch=default]
+  [ui.note log.description|description:]
+  [ui.note log.description|Modify, add, remove, rename]
+  
+  [ui.note log.files|files:]
+  [status.modified|M third]
+  [status.added|A b]
+  [status.added|A fifth]
+  [status.copied|  fourth]
+  [status.removed|R a]
+  [status.removed|R fourth]
+  
+  $ hg --color=debug log -T status -C -r 10 --quiet
+  [log.node|10:0f9759ec227a]
+
+
 Error on syntax:
 
   $ echo 'x = "f' >> t

tests/test-log.t

@@ -148,7 +148,7 b' log on directory'
 
   $ hg log -f -l1 --style something
   abort: style 'something' not found
-  (available styles: bisect, changelog, compact, default, phases, xml)
+  (available styles: bisect, changelog, compact, default, phases, status, xml)
   [255]
 
 -f, phases style