system/skopeo: Added (utility for container images and registries).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

system/skopeo/README

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+skopeo is a command line utility that performs various operations on container
+images and image repositories. It can work with OCI images as well as the
+original Docker v2 images. It works with API V2 registries such as Docker
+registries, private registries, local directories and local OCI-layout
+directories.
+
+`skopeo inspect docker://docker.io/vbatts/slackware`

system/skopeo/skopeo.SlackBuild

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+#!/bin/sh
+
+# Slackware build script for skopeo
+
+# Copyright 2019 Vincent Batts, Raleigh, NC, USA
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=skopeo
+VERSION=${VERSION:-0.1.34}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+DOMAIN=github.com
+ORG=containers
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  LIBDIRSUFFIX="64"
+else
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+mkdir -p $PRGNAM-$VERSION/src/$DOMAIN/$ORG
+cd $PRGNAM-$VERSION/src/$DOMAIN/$ORG
+rm -rf $PRGNAM
+tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
+mv $PRGNAM-$VERSION $PRGNAM
+cd $PRGNAM
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+# Point go to the location of the source tree
+export GOPATH="$TMP/$PRGNAM-$VERSION"
+
+make binary-local BUILDTAGS="containers_image_ostree_stub"
+make install DESTDIR="$PKG" MANINSTALLDIR="$PKG/usr/man"
+#install -m 755 ./skopeo $PKG/usr/bin/skopeo
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+find $PKG/usr/man -type f -exec gzip -9 {} \;
+for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a \
+  LICENSE README.md vendor.conf \
+  $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

system/skopeo/skopeo.info

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+PRGNAM="skopeo"
+VERSION="v0.1.34"
+HOMEPAGE="https://github.com/containers/skopeo"
+DOWNLOAD="https://github.com/containers/skopeo/archive/v0.1.34/skopeo-0.1.34.tar.gz"
+MD5SUM="3a5efec9f5efff1524b1c7b41d152954"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="go-md2man"
+MAINTAINER="Vincent Batts"
+EMAIL="vbatts@hashbangbash.com"

system/skopeo/slack-desc

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+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+      |-----handy-ruler------------------------------------------------------|
+skopeo: skopeo (utility for container images and registries)
+skopeo:
+skopeo: skopeo is a command line utility that performs various operations
+skopeo: on container images and image repositories. It can work with OCI
+skopeo: images as well as the original Docker v2 images. It works with API V2
+skopeo: registries such as Docker registries, private registries, local
+skopeo: directories and local OCI-layout directories.
+skopeo:
+skopeo: Site: https://github.com/containers/skopeo
+skopeo:
+skopeo: