[bug#38738] [PATCH WIP] etc: Add "tarball" snippet.

[Brett Gilio]

This patch is actually a WIP. I'd ideally like it if it could also
detect the addition of `(git-file-name ...)` and add that to the
sub-header commit message portion, but I am not so talented in Yasnippet
creation :).

If anybody wants to take a crack at it, please do. But I think this
snippet will prove useful as we will almost always have unstable
tarballs coming into our sources.

>From f4b14a47e3741c107ea83e2717674c8a032f8dba Mon Sep 17 00:00:00 2001
From: Brett Gilio <address@hidden>
Date: Tue, 24 Dec 2019 23:42:27 -0600
Subject: [PATCH] etc: Add "tarball" snippet.

* etc/snippets/text-mode/guix-commit-message-unstable-tarball: New file.
---
 .../text-mode/guix-commit-message-unstable-tarball        | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 etc/snippets/text-mode/guix-commit-message-unstable-tarball

diff --git a/etc/snippets/text-mode/guix-commit-message-unstable-tarball 
b/etc/snippets/text-mode/guix-commit-message-unstable-tarball
new file mode 100644
index 0000000000..e82f522e54
--- /dev/null
+++ b/etc/snippets/text-mode/guix-commit-message-unstable-tarball
@@ -0,0 +1,8 @@
+# -*- mode: snippet -*-
+# name: guix-commit-message-unstable-tarball
+# key: tarball
+# condition: git-commit-mode
+# --
+gnu: $1: Don't use unstable tarball.
+
+* `(car (magit-staged-files))` ($1)[source]: Download using GIT-FETCH.
\ No newline at end of file
-- 
2.24.1