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diff --git a/eclass/vcs-clean.eclass b/eclass/vcs-clean.eclass
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+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: vcs-clean.eclass
+# @MAINTAINER:
+# base-system@gentoo.org
+# @AUTHOR:
+# Benedikt Böhm <hollow@gentoo.org>
+# @BLURB: helper functions to remove VCS directories
+
+# @FUNCTION: ecvs_clean
+# @USAGE: [list of dirs]
+# @DESCRIPTION:
+# Remove CVS directories and .cvs* files recursively.  Useful when a
+# source tarball contains internal CVS directories.  Defaults to ${PWD}.
+ecvs_clean() {
+	[[ $# -eq 0 ]] && set -- .
+	find "$@" '(' -type d -name 'CVS' -prune -o -type f -name '.cvs*' ')' \
+		-exec rm -rf '{}' +
+}
+
+# @FUNCTION: esvn_clean
+# @USAGE: [list of dirs]
+# @DESCRIPTION:
+# Remove .svn directories recursively.  Useful when a source tarball
+# contains internal Subversion directories.  Defaults to ${PWD}.
+esvn_clean() {
+	[[ $# -eq 0 ]] && set -- .
+	find "$@" -type d -name '.svn' -prune -exec rm -rf '{}' +
+}
+
+# @FUNCTION: egit_clean
+# @USAGE: [list of dirs]
+# @DESCRIPTION:
+# Remove .git* directories recursively.  Useful when a source tarball
+# contains internal Git directories.  Defaults to ${PWD}.
+egit_clean() {
+	[[ $# -eq 0 ]] && set -- .
+	find "$@" -type d -name '.git*' -prune -exec rm -rf '{}' +
+}