From c20f36e0e41bc0ee6a131c3610a9bfee3ea9bbe6 Mon Sep 17 00:00:00 2001
From: Tomi Ollila <tomi.ollila@iki.fi>
Date: Wed, 14 Nov 2012 11:43:00 +0200
Subject: [PATCH] Re: emacs: Handling external dependencies

---
 e2/e6a3b36216ab6c7e94fce174005ec542f303c2 | 97 +++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 e2/e6a3b36216ab6c7e94fce174005ec542f303c2

diff --git a/e2/e6a3b36216ab6c7e94fce174005ec542f303c2 b/e2/e6a3b36216ab6c7e94fce174005ec542f303c2
new file mode 100644
index 000000000..916fd2ea7
--- /dev/null
+++ b/e2/e6a3b36216ab6c7e94fce174005ec542f303c2
@@ -0,0 +1,97 @@
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+	Wed, 14 Nov 2012 11:43:01 +0200 (EET)
+From: Tomi Ollila <tomi.ollila@iki.fi>
+To: Ethan Glasser-Camp <ethan.glasser.camp@gmail.com>,
+	Damien Cassou <damien.cassou@gmail.com>,
+	notmuch mailing list <notmuch@notmuchmail.org>
+Subject: Re: emacs: Handling external dependencies
+In-Reply-To: <87pq3h56d5.fsf@betacantrips.com>
+References:
+ <CA+y5ggiGrAcicQLeskaXFoxYyJQVVXZ1VRX=XS8zPFR9_mBFxA@mail.gmail.com>
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+Date: Wed, 14 Nov 2012 11:43:00 +0200
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+
+On Wed, Nov 14 2012, Ethan Glasser-Camp <ethan.glasser.camp@gmail.com> wrote:
+
+> Damien Cassou <damien.cassou@gmail.com> writes:
+>
+>> 4) distribute the dependency with the rest of notmuch (in a separate
+>> "fallback-libs/" directory) and load it only when requiring the
+>> library with the standard load-path does not work. Jonas Bernoulli
+>> gave me a way to do that:
+>>
+>> ,----
+>> | (or (require 'THE-LIB nil t)
+>> |     (let ((load-path
+>> |           (cons (expand-file-name
+>> |                  "fallback-libs"
+>> |                  (file-name-directory (or load-file-name buffer-file-name)))
+>> |                 load-path)))
+>> |       (require 'THE-LIB)))
+>> `----
+>>
+>> What do you think?
+>
+> Why not just append it to the *end* of load-path? Then it won't shadow
+> anything.
+
+The scope of the load-path change is for just this one require -- if
+header-button required some other modules, the fallback-libs version
+should be preferred (in case exists) over loading elsewehere in this case
+header-button is loaded from fallback-libs.
+
+But, maybe we should be more spesific there and use something like:
+
+(let ((dir (expand-file-name 
+            "notmuch-deps" 
+            (file-name-directory (or load-file-name buffer-file-name)))))
+  (unless (require 'header-button (concat dir "/header-button.elc") t)
+          (require 'header-button (concat dir "/header-button.el") nil)))
+
+
+(if we ever agree to do either kind of loading...)
+
+> Ethan
+
+Tomi
-- 
2.26.2