git-jump: support Emacs

Add an optional argument 'stdout' to print the quickfix lines to standard output. It can be used with M-x grep on Emacs.

Detect emacsclient by GIT_EDITOR and invoke the function. Tested with EDITOR="emacsclient" and EDITOR="emacsclient -t".

Jeff King (1):
git-jump: move valid-mode check earlier

Yoichi Nakayama (2):
git-jump: add an optional argument '--stdout'
git-jump: invoke emacs/emacsclient

 contrib/git-jump/README   | 10 ++++++++-
 contrib/git-jump/git-jump | 45 ++++++++++++++++++++++++++++++++++++---
 2 files changed, 51 insertions(+), 4 deletions(-)

base-commit: eea7033409a0ed713c78437fc76486983d211e25
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1423%2Fyoichi%2Fgit-jump-emacs-support-v8
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1423/yoichi/git-jump-emacs-support-v8
Pull-Request: https://github.com/gitgitgadget/git/pull/1423

Range-diff vs v7:

1: 446777d300d ! 1: afface9b010 git-jump: add an optional argument '--stdout'

     @@ contrib/git-jump/git-jump: mode_ws() {
      +	case "$1" in
      +	--stdout)
      +		use_stdout=t
     -+		shift
      +		;;
      +	--*)
      +		usage >&2
     @@ contrib/git-jump/git-jump: mode_ws() {
      +		break
      +		;;
      +	esac
     ++	shift
      +done
       if test $# -lt 1; then
       	usage >&2
 2:  972d51888ba = 2:  e9aa6fdf836 git-jump: move valid-mode check earlier
 3:  d8233f96175 ! 3:  048f508ca99 git-jump: invoke emacs/emacsclient
     @@ contrib/git-jump/git-jump: EOF
      +		#
      +		# Wait for completion of the asynchronously executed process
      +		# to avoid race conditions in case of "emacsclient".
     -+		eval "$editor --eval \"(let ((buf (compilation-start \\\"cat \$1\\\" 'grep-mode))) (pop-to-buffer buf) (select-frame-set-input-focus (selected-frame)) (while (get-buffer-process buf) (sleep-for 0.1)))\""
     ++		eval "$editor --eval \"(let ((buf (grep \\\"cat \$1\\\"))) (pop-to-buffer buf) (select-frame-set-input-focus (selected-frame)) (while (get-buffer-process buf) (sleep-for 0.1)))\""
      +		;;
      +	*)
      +		# assume anything else is vi-compatible

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