maint: add gen-contributors-list.sh script

* maint/gen-contributors-list.sh: New file.

diff --git a/maint/gen-contributors-list.sh b/maint/gen-contributors-list.sh
new file mode 100755 (executable)
index 0000000..76ce69d
--- /dev/null
+++ b/maint/gen-contributors-list.sh
@@ -0,0 +1,39 @@
+#!/bin/sh -efu
+# Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+get_commit_id()
+{
+       git rev-parse --verify "$1^{commit}"
+}
+
+what="$(get_commit_id "${1:-@}")"
+since="${2:-$(git describe --abbrev=0 --match='v*' "$what")}"
+since="$(get_commit_id "$since")"
+script='s/^[^:@<]\+:[[:space:]]*\([^<@[:space:]][^<@]*\)[[:space:]]<[^<@]\+@.*/\1/p'
+
+git log --use-mailmap "^$since" "$what" |
+       sed -n "$script" |
+       LC_COLLATE=C sort -u