[解決済み】マージが終了していない（MERGE_HEADが存在する）。

質問

fというブランチがあり、masterにチェックアウトしたいのですが、その際に git pull というエラーが発生します。

You have not concluded your merge (MERGE_HEAD exists).
Please, commit your changes before you can merge.

私が実行する git status というメッセージが表示されます。

On branch master
# Your branch and 'origin/master' have diverged,
# and have 1 and 13 different commit(s) each, respectively.
#
# Changes to be committed:
#
#   modified:   app/assets/images/backward.png
#   modified:   app/assets/images/forward.png
#   new file:   app/assets/images/index_background.jpg
#   new file:   app/assets/images/loading.gif
#   modified:   app/assets/images/pause.png
#   modified:   app/assets/images/play.png
#   new file:   app/assets/javascripts/jquery-ui-bootstrap.js
#   new file:   app/assets/stylesheets/jquery-ui-bootstrap.css
#   modified:   app/controllers/friends_controller.rb
#   modified:   app/controllers/plays_controller.rb
#   modified:   app/mailers/invite_friends_mailer.rb
#   modified:   app/mailers/send_plays_mailer.rb
#   modified:   app/mailers/shot_chart_mailer.rb
#   modified:   app/views/friends/show_plays.html.erb
#   modified:   app/views/layouts/application.html.erb
#   modified:   app/views/plays/_inbox_table.html.erb
#   modified:   app/views/plays/show.html.erb
#   modified:   app/views/welcome/contact_form.html.erb
#   modified:   app/views/welcome/index.html.erb
#   modified:   log/development.log
#   modified:   log/restclient.log
#   new file:   tmp/cache/assets/C1A/C00/sprockets%2Fb7901e0813446f810e560158a1a97066
#   modified:   tmp/cache/assets/C64/930/sprockets%2F65aa1510292214f4fd1342280d521e4c
#   new file:   tmp/cache/assets/C73/C40/sprockets%2F96912377b93498914dd04bc69fa98585
#   new file:   tmp/cache/assets/CA9/090/sprockets%2Fa71992733a432421e67e03ff1bd441d8
#   new file:   tmp/cache/assets/CCD/7E0/sprockets%2F47125c2ebd0e8b29b6511b7b961152a1
#   modified:   tmp/cache/assets/CD5/DD0/sprockets%2F59d317902de6e0f68689899259caff26
#   modified:   tmp/cache/assets/CE3/080/sprockets%2F5c3b516e854760f14eda2395c4ff2581
#   new file:   tmp/cache/assets/CED/B20/sprockets%2F423772fde44ab6f6f861639ee71444c4
#   new file:   tmp/cache/assets/D0C/E10/sprockets%2F8d1f4b30c6be13017565fe1b697156ce
#   new file:   tmp/cache/assets/D12/290/sprockets%2F93ae21f3cdd5e24444ae4651913fd875
#   new file:   tmp/cache/assets/D13/FC0/sprockets%2F57aad34b9d3c9e225205237dac9b1999
#   new file:   tmp/cache/assets/D1D/DE0/sprockets%2F5840ff4283f6545f472be8e10ce67bb8
#   new file:   tmp/cache/assets/D23/BD0/sprockets%2F439d5dedcc8c54560881edb9f0456819
#   new file:   tmp/cache/assets/D24/570/sprockets%2Fb449db428fc674796e18b7a419924afe
#   new file:   tmp/cache/assets/D28/480/sprockets%2F9aeec798a04544e478806ffe57e66a51
#   new file:   tmp/cache/assets/D3A/ED0/sprockets%2Fcd959cbf710b366c145747eb3c062bb4
#   new file:   tmp/cache/assets/D3C/060/sprockets%2F363ac7c9208d3bb5d7047f11c159d7ce
#   new file:   tmp/cache/assets/D48/D00/sprockets%2Fe23c97b8996e7b5567a3080c285aaccb
#   new file:   tmp/cache/assets/D6A/900/sprockets%2Fa5cece9476b21aa4d5f46911ca96c450
#   new file:   tmp/cache/assets/D6C/510/sprockets%2Fb086a020de3c258cb1c67dfc9c67d546
#   new file:   tmp/cache/assets/D70/F30/sprockets%2Facf9a6348722adf1ee7abbb695603078
#   new file:   tmp/cache/assets/DA3/4A0/sprockets%2F69c26d0a9ca8ce383e20897cefe05aa4
#   new file:   tmp/cache/assets/DA7/2F0/sprockets%2F61da396fb86c5ecd844a2d83ac759b4b
#   new file:   tmp/cache/assets/DB9/C80/sprockets%2F876fbfb9685b2b8ea476fa3c67ae498b
#   new file:   tmp/cache/assets/DBD/7A0/sprockets%2F3640ea84a1dfaf6f91a01d1d6fbe223d
#   new file:   tmp/cache/assets/DC1/8D0/sprockets%2Fe5ee1f1cfba2144ec00b1dcd6773e691
#   new file:   tmp/cache/assets/DCC/E60/sprockets%2Fd6a95f601456c93ff9a1bb70dea3dfc0
#   new file:   tmp/cache/assets/DF1/130/sprockets%2Fcda4825bb42c91e2d1f1ea7b2b958bda
#   new file:   tmp/cache/assets/E23/DE0/sprockets%2Fb1acc25c28cd1fabafbec99d169163d3
#   new file:   tmp/cache/assets/E23/FD0/sprockets%2Fea3dbcd1f341008ef8be67b1ccc5a9c5
#   modified:   tmp/cache/assets/E4E/AD0/sprockets%2Fb930f45cfe7c6a8d0efcada3013cc4bc
#   new file:   tmp/cache/assets/E63/7D0/sprockets%2F77de495a665c3ebcb47befecd07baae6
#   modified:   tmp/pids/server.pid
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#   Coachbase/
#   log/development.log.orig
#   log/restclient.log.orig

解決方法は？

OK。問題は、あなたの前回のプルが自動マージに失敗し、コンフリクト状態になったことです。そして、そのコンフリクトは次のプルの前に適切に解決されなかったのです。

1. マージを元に戻し、再度プルします。

   マージを元に戻すには

   git merge --abort [gitバージョン1.7.4以降]。

   git reset --merge [以前のgitバージョン]。

2. 競合を解決します。

3. マージを追加してコミットすることを忘れないでください。

4. git pull で、問題なく動作するはずです。