added apk-remove-packages.sh

apk-remove-packages.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+#  vim:ts=4:sts=4:sw=4:et
+#
+#  Author: Hari Sekhon
+#  Date: 2019-02-15 21:31:10 +0000 (Fri, 15 Feb 2019)
+#
+#  https://github.com/harisekhon/bash-tools
+#
+#  License: see accompanying Hari Sekhon LICENSE file
+#
+#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
+#
+#  https://www.linkedin.com/in/harisekhon
+#
+
+# Remove Apk packages in a forgiving way - useful for uninstalling development packages no longer needed eg. to minimize size of Docker images
+
+set -eu
+[ -n "${DEBUG:-}" ] && set -x
+
+if [ $# = 0 ]; then
+    echo "usage: ${0##*/} <filename> <filename> ..."
+    exit 1
+fi
+
+echo "Removing Apk Packages"
+
+apk_packages="$(sed 's/#.*//; /^[[:space:]]*$/d' "$@")"
+
+SUDO=""
+# $EUID isn't available in /bin/sh in Alpine
+[ "${EUID:-$(id -u)}" != 0 ] && SUDO=sudo
+
+if [ -n "${NOFAIL:-}" ]; then
+    if ! apk del $apk_packages; then
+        for package in $apk_packages; do
+            ${SUDO} apk del "$package" || :
+        done
+    fi
+else
+    apk del $apk_packages
+fi