[PATCH] emacs: add emacs/try-emacs-mua.sh

[Tomi Ollila]

try-emacs-mua.sh provides an easy way to try and experiment with the
notmuch emacs client provided in emacs subdirectory of notmuch source
tree.

User is required to choose whether to run emacs with -q, -Q or neither
-- and experienced ones may add other command line options, like
'-f notmuch'.

This script ensures that no .el files are newer than corresponding .elc
files so that user (/developer!) does not accidentally experiment with
outdated elisp files.

The *scratch* buffer is filled with some code user can execute before
running notmuch code.
---

I developed this when doing series starting from
  id:1441204482-26509-1-git-send-email-tomi.ollila at iki.fi
and found this useful when testing
  id:1441574945-28437-1-git-send-email-uli at scholler.net

 emacs/try-emacs-mua.sh | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100755 emacs/try-emacs-mua.sh

diff --git a/emacs/try-emacs-mua.sh b/emacs/try-emacs-mua.sh
new file mode 100755
index 000000000000..923137b41de6
--- /dev/null
+++ b/emacs/try-emacs-mua.sh
@@ -0,0 +1,68 @@
+#!/bin/sh
+
+# This script provides an easy way to try and experiment with the
+# notmuch emacs client provided in this directory.
+
+set -eu
+
+test $# -gt 0 || {
+	exec >&2
+	echo
+	echo "Usage: $0 '' | q | Q [other-emacs-args]"
+	echo
+	printf "  $0 %s\n" "'' starts emacs without either -q or -Q option" \
+		"q  starts emacs with -q" \
+		"Q  starts emacs with -Q"
+	echo
+	exit 1
+}
+
+case $1 in '') opt=
+	;; q | -q) opt=-q
+	;; Q | -Q) opt=-Q
+	;; *) echo "option '$1' not '', 'q' nor 'Q'" >&2; exit 1
+esac
+shift
+
+case $0 in
+	*\"*)	echo "'$0' contain one or more '\"'s" >&2; exit 1 ;;
+	*/*)	d0=${0%/*} ;;
+	*)	d0=.
+esac
+
+pwd=$PWD
+cd "$d0"
+elwd=$PWD
+
+# ensure we don't load .elc files that are older than corresponding .el file
+perl -e 'use strict; use warnings;
+while (<*.elc>) {
+	my $elc = $_; s/elc$/el/;
+	if (-M $_ < -M $elc) {
+		warn "$_ is newer than $elc. Removing $elc\n";
+		unlink $elc or die "Failed to remove '\''$elc'\'': $!\n";
+	}
+}'
+
+cd "$pwd"
+
+# note: whitespace in $EMACS splits to command and args
+exec ${EMACS:-emacs} $opt -L "$elwd" -l "$d0"/notmuch.el "$@" --eval '
+(with-current-buffer "*scratch*"
+  (let ((pdir (expand-file-name "'"$elwd/.."'")))
+    (insert "
+Go to the end of the following lines and type C-x C-e to evaluate
+
+To \"disable\" mail sending, evaluate
+(setq message-send-mail-function (lambda () t))
+
+To enable address completion, evaluate
+(notmuch-address-message-insinuate)
+
+To use accompanied notmuch binary from the same source, evaluate
+(setq exec-path (cons \"" pdir "\" exec-path))
+Note: Evaluating the above may be followed by unintended database
+upgrade and getting back to old version may require dump & restore.
+
+To start notmuch (hello) screen, evaluate
+(notmuch-hello)")) (set-buffer-modified-p nil))'
-- 
2.0.0