[PR PATCH] mdBook: add completions

[meator <meator@users.noreply.github.com>]

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There is a new pull request by meator against master on the void-packages repository

https://github.com/meator/void-packages mdBook-completions
https://github.com/void-linux/void-packages/pull/48934

mdBook: add completions
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ping maintainer: @ericonr 

#### Testing the changes
- I tested the changes in this PR: **YES**

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A patch file from https://github.com/void-linux/void-packages/pull/48934.patch is attached

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From 174387b57ce35d599764eaa44b509d65d91fe159 Mon Sep 17 00:00:00 2001
From: meator <meator.dev@gmail.com>
Date: Sun, 25 Feb 2024 17:37:17 +0100
Subject: [PATCH] mdBook: add completions

---
 srcpkgs/mdBook/template | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/srcpkgs/mdBook/template b/srcpkgs/mdBook/template
index dbebda4f3dec58..e3caf02595d6f6 100644
--- a/srcpkgs/mdBook/template
+++ b/srcpkgs/mdBook/template
@@ -1,8 +1,9 @@
 # Template file for 'mdBook'
 pkgname=mdBook
 version=0.4.37
-revision=1
+revision=2
 build_style=cargo
+build_helper=qemu
 short_desc="Create book from markdown files. Like Gitbook but implemented in Rust"
 maintainer="Érico Nogueira <ericonr@disroot.org>"
 license="MPL-2.0"
@@ -13,4 +14,9 @@ checksum=7a360cb8702d8a35d9db9d0639a6a4650d3a9492970cf772f49c5a99d981272c
 
 post_install() {
 	vlicense LICENSE
+
+	for completion in bash fish zsh; do
+		vtargetrun $DESTDIR/usr/bin/mdbook completions $completion > mdbook.$completion
+		vcompletion mdbook.$completion $completion
+	done
 }