rsv: fix cross-build, add completions

srcpkgs/rsv/template

@@ -1,11 +1,24 @@
 # Template file for 'rsv'
 pkgname=rsv
 version=1.3.3
-revision=1
+revision=2
 build_style=cargo
+build_helper=qemu
 short_desc="Runit sv command rewritten in rust with nice new features"
 maintainer="mkf <makefile@riseup.net>"
 license="GPL-3.0-only"
 homepage="https://github.com/JojiiOfficial/rsv"
 distfiles="https://github.com/JojiiOfficial/rsv/archive/v${version}.tar.gz"
 checksum=599c8f2db3aab8dd36a290cbe63d6489453f5e76fd432eeb85a6a96058ecfa88
+
+pre_build() {
+	# fixes an indexmap error when cross compiling
+	cargo update --package autocfg:1.0.1 --precise 1.1.0
+}
+
+post_install() {
+	for sh in bash zsh fish; do
+		vtargetrun ${DESTDIR}/usr/bin/rsv --generate $sh > completions.$sh
+		vcompletion completions.$sh $sh
+	done
+}