eclass/vim-plugin: Sync with gentoo

It's from gentoo commit d2194b951c8a8fbdce77ccafae4356d44c2a29c7.

sdk_container/src/third_party/portage-stable/eclass/vim-plugin.eclass

@@ -1,9 +1,10 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: vim-plugin.eclass
 # @MAINTAINER:
 # vim@gentoo.org
+# @SUPPORTED_EAPIS: 6 7
 # @BLURB: used for installing vim plugins
 # @DESCRIPTION:
 # This eclass simplifies installation of app-vim plugins into
@@ -11,7 +12,12 @@
 # which is read automatically by vim.  The only exception is
 # documentation, for which we make a special case via vim-doc.eclass.
 
-inherit estack vim-doc
+case ${EAPI} in
+	6|7);;
+	*) die "EAPI ${EAPI:-0} unsupported (too old)";;
+esac
+
+inherit vim-doc
 EXPORT_FUNCTIONS src_install pkg_postinst pkg_postrm
 
 VIM_PLUGIN_VIM_VERSION="${VIM_PLUGIN_VIM_VERSION:-7.3}"
@@ -33,47 +39,17 @@ SLOT="0"
 # * installs all files in "${ED}"/usr/share/vim/vimfiles.
 vim-plugin_src_install() {
 	has "${EAPI:-0}" 0 1 2 && ! use prefix && ED="${D}"
-	local f
-
-	# When globbing, if nothing exists, the shell literally returns the glob
-	# pattern. So turn on nullglob and extglob options to avoid this.
-	eshopts_push -s extglob
-	eshopts_push -s nullglob
-
-	ebegin "Cleaning up unwanted files and directories"
-	# We're looking for dotfiles, dotdirectories and Makefiles here.
-	local obj
-	eval "local matches=(@(.[^.]|.??*|Makefile*))"
-	for obj in "${matches[@]}"; do
-		rm -rv "${obj}" || die "cannot remove ${obj}"
-	done
-	eend $?
-
-	# Turn those options back off.
-	eshopts_pop
-	eshopts_pop
 
 	# Install non-vim-help-docs
-	cd "${S}" || die "couldn't cd in ${S}"
+	einstalldocs
-	local f
-	for f in *; do
-		[[ -f "${f}" ]] || continue
-		if [[ "${f}" = *.html ]]; then
-			dohtml "${f}"
-		else
-			dodoc "${f}"
-		fi
-		rm "${f}" || die
-	done
 
 	# Install remainder of plugin
-	cd "${WORKDIR}" || die "couldn't cd in ${WORKDIR}"
+	insinto /usr/share/vim/vimfiles/
-	dodir /usr/share/vim
+	local d
-	mv "${S}" "${ED}"/usr/share/vim/vimfiles || die \
+	for d in *; do
-		"couldn't move ${S} to ${ED}/usr/share/vim/vimfiles"
+		[[ -d "${d}" ]] || continue
-
+		doins -r "${d}"
-	# Set permissions
+	done
-	fperms -R a+rX /usr/share/vim/vimfiles
 }
 
 # @FUNCTION: vim-plugin_pkg_postinst
@@ -150,31 +126,31 @@ update_vim_afterscripts() {
 display_vim_plugin_help() {
 	local h
 
-	if ! has_version ${CATEGORY}/${PN} ; then
+	if [[ -z ${REPLACING_VERSIONS} ]]; then
-		if [[ -n "${VIM_PLUGIN_HELPFILES}" ]] ; then
+		if [[ -n ${VIM_PLUGIN_HELPFILES} ]]; then
 			elog " "
 			elog "This plugin provides documentation via vim's help system. To"
 			elog "view it, use:"
-			for h in ${VIM_PLUGIN_HELPFILES} ; do
+			for h in ${VIM_PLUGIN_HELPFILES}; do
 				elog "    :help ${h}"
 			done
 			elog " "
 
-		elif [[ -n "${VIM_PLUGIN_HELPTEXT}" ]] ; then
+		elif [[ -n ${VIM_PLUGIN_HELPTEXT} ]]; then
 			elog " "
 			while read h ; do
 				elog "$h"
 			done <<<"${VIM_PLUGIN_HELPTEXT}"
 			elog " "
 
-		elif [[ -n "${VIM_PLUGIN_HELPURI}" ]] ; then
+		elif [[ -n ${VIM_PLUGIN_HELPURI} ]]; then
 			elog " "
 			elog "Documentation for this plugin is available online at:"
 			elog "    ${VIM_PLUGIN_HELPURI}"
 			elog " "
 		fi
 
-		if has "filetype" "${VIM_PLUGIN_MESSAGES}" ; then
+		if has filetype ${VIM_PLUGIN_MESSAGES}; then
 			elog "This plugin makes use of filetype settings. To enable these,"
 			elog "add lines like:"
 			elog "    filetype plugin on"