[PR PATCH] shutils/show.sh: never show self deps for depends

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

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

https://github.com/Johnnynator/void-packages xbps-src-show-deps
https://github.com/void-linux/void-packages/pull/27577

shutils/show.sh: never show self deps for depends
xbps-src always ignore self deps in depends and in hostmakedepends
when not cross compiling. The old behaviour did only check for cross.
This now also ignores them in makedepends, but they are either way
disallowed in there, and returning an error would be correct, but
./xbps-src show-* is and never was suitable for linting, so ignore for now.

A patch file from https://github.com/void-linux/void-packages/pull/27577.patch is attached

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From 3a9f4b70499c602a2ede77dd277bc802e4d70d4f Mon Sep 17 00:00:00 2001
From: John <me@johnnynator.dev>
Date: Thu, 31 Dec 2020 15:49:51 +0100
Subject: [PATCH] shutils/show.sh: never show self deps for depends

xbps-src always ignore self deps in depends and in hostmakedepends
when not cross compiling. The old behaviour did only check for cross.
This now also ignores them in makedepends, but they are either way
disallowed in there, and returning an error would be correct, but
./xbps-src show-* is and never was suitable for linting, so ignore for now.
---
 common/xbps-src/shutils/show.sh | 57 ++++++++++++++++++++-------------
 1 file changed, 34 insertions(+), 23 deletions(-)

diff --git a/common/xbps-src/shutils/show.sh b/common/xbps-src/shutils/show.sh
index 2f545ce6474..e2f50f618ad 100644
--- a/common/xbps-src/shutils/show.sh
+++ b/common/xbps-src/shutils/show.sh
@@ -76,48 +76,59 @@ show_avail() {
     check_pkg_arch "$XBPS_CROSS_BUILD" 2>/dev/null
 }
 
+show_eval_dep() {
+    local f x _pkgname _srcpkg found
+    local _dep="$1"
+    local _host="$2"
+    if [ -z "$CROSS_BUILD" ] || [ -z "$_host" ]; then
+        # ignore dependency on itself
+        [[ $_dep == $sourcepkg ]] && return
+    fi
+    if [ ! -f $XBPS_SRCPKGDIR/$_dep/template ]; then
+        msg_error "$pkgver: dependency '$_dep' does not exist!\n"
+    fi
+    # ignore virtual dependencies
+    [[ ${_dep%\?*} != ${_dep#*\?} ]] && _dep=${_dep#*\?}
+    unset found
+    # check for subpkgs
+    for x in ${subpackages}; do
+        [[ $_dep == $x ]] && found=1 && break
+    done
+    [[ $found ]] && return
+    _pkgname=${_dep/-32bit}
+    _srcpkg=$(readlink -f ${XBPS_SRCPKGDIR}/${_pkgname})
+    _srcpkg=${_srcpkg##*/}
+    echo $_srcpkg
+}
+
 show_pkg_build_depends() {
-    local f x _pkgname _srcpkg found result
+    local f result
     local _deps="$1"
+    local _hostdeps="$2"
 
     result=$(mktemp) || exit 1
 
     # build time deps
     for f in ${_deps}; do
-        if [ -z "$CROSS_BUILD" ]; then
-            # ignore dependency on itself
-            [[ $f == $sourcepkg ]] && continue
-        fi
-        if [ ! -f $XBPS_SRCPKGDIR/$f/template ]; then
-            msg_error "$pkgver: dependency '$f' does not exist!\n"
-        fi
-        # ignore virtual dependencies
-        [[ ${f%\?*} != ${f#*\?} ]] && f=${f#*\?}
-        unset found
-        # check for subpkgs
-        for x in ${subpackages}; do
-            [[ $f == $x ]] && found=1 && break
-        done
-        [[ $found ]] && continue
-        _pkgname=${f/-32bit}
-        _srcpkg=$(readlink -f ${XBPS_SRCPKGDIR}/${_pkgname})
-        _srcpkg=${_srcpkg##*/}
-        echo "${_srcpkg}" >> $result
+        show_eval_dep $f "" >> $result
+    done
+    for f in ${_hostdeps}; do
+        show_eval_dep $f "hostdep" >> $result
     done
     sort -u $result
     rm -f $result
 }
 
 show_pkg_build_deps() {
-    show_pkg_build_depends "${hostmakedepends} ${makedepends} $(setup_pkg_depends '' 1 1)"
+    show_pkg_build_depends "${makedepends} $(setup_pkg_depends '' 1 1)" "${hostmakedepends}"
 }
 
 show_pkg_hostmakedepends() {
-    show_pkg_build_depends "${hostmakedepends}"
+    show_pkg_build_depends "" "${hostmakedepends}"
 }
 
 show_pkg_makedepends() {
-    show_pkg_build_depends "${makedepends}"
+    show_pkg_build_depends "${makedepends}" ""
 }
 
 show_pkg_build_options() {