Accepting request 833745 from home:favogt:dockerfilemeta

New service, like kiwi_label_helper, but for Dockerfile.

OBS-URL: https://build.opensuse.org/request/show/833745
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Tools/obs-service-docker_label_helper?expand=0&rev=1

.gitattributes

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+## Default LFS
+*.7z filter=lfs diff=lfs merge=lfs -text
+*.bsp filter=lfs diff=lfs merge=lfs -text
+*.bz2 filter=lfs diff=lfs merge=lfs -text
+*.gem filter=lfs diff=lfs merge=lfs -text
+*.gz filter=lfs diff=lfs merge=lfs -text
+*.jar filter=lfs diff=lfs merge=lfs -text
+*.lz filter=lfs diff=lfs merge=lfs -text
+*.lzma filter=lfs diff=lfs merge=lfs -text
+*.obscpio filter=lfs diff=lfs merge=lfs -text
+*.oxt filter=lfs diff=lfs merge=lfs -text
+*.pdf filter=lfs diff=lfs merge=lfs -text
+*.png filter=lfs diff=lfs merge=lfs -text
+*.rpm filter=lfs diff=lfs merge=lfs -text
+*.tbz filter=lfs diff=lfs merge=lfs -text
+*.tbz2 filter=lfs diff=lfs merge=lfs -text
+*.tgz filter=lfs diff=lfs merge=lfs -text
+*.ttf filter=lfs diff=lfs merge=lfs -text
+*.txz filter=lfs diff=lfs merge=lfs -text
+*.whl filter=lfs diff=lfs merge=lfs -text
+*.xz filter=lfs diff=lfs merge=lfs -text
+*.zip filter=lfs diff=lfs merge=lfs -text
+*.zst filter=lfs diff=lfs merge=lfs -text

.gitignore

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+.osc

README

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+obs-service-docker_label_helper
+===============================
+
+This service can be enabled to run during buildtime, when it will edit the
+Dockerfile to expand the PREFIXEDLABEL instruction.
+
+Example:
+
+```
+FROM opensuse/tumbleweed
+# labelprefix=org.opensuse.nano
+PREFIXEDLABEL org.opencontainers.image.title="Example container"
+PREFIXEDLABEL org.opencontainers.image.description="This contains nano"
+```
+
+expands to
+
+```
+FROM opensuse/tumbleweed
+LABEL org.opensuse.nano.title="Example container"
+LABEL org.opencontainers.image.title="Example container"
+LABEL org.opensuse.nano.description="This contains nano"
+LABEL org.opencontainers.image.description="This contains nano"
+```

docker_label_helper

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+#!/bin/bash
+set -eu
+
+if [ "${BUILD_DIST+x}" != "x" ]; then
+	echo "Not running in an OBS build container"
+	exit 1
+fi
+
+BUILD_DATA="${BUILD_DIST/.dist/.data}"
+if [ -e "${BUILD_DATA}" ]; then
+	. "${BUILD_DATA}"
+
+	# The build script renames the recipe (to strip _service:foo:), but doesn't update .data
+	RECIPEFILE="${RECIPEFILE##*:}"
+
+	if [ "${RECIPEFILE}" != "Dockerfile" ]; then
+		echo "Recipe is not a Dockerfile - exiting"
+		exit 0
+	fi
+fi
+
+gawk -i inplace '
+	match($0, /^# labelprefix=(.*)$/, m) { labelprefix=m[1]; next }
+	labelprefix != "" && match($0, /^PREFIXEDLABEL .*\.([^.]*)=(.*)$/, m) { printf "LABEL %s.%s=%s\n", labelprefix, m[1], m[2]; $1 = "LABEL" }
+	1' Dockerfile

docker_label_helper.service

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+<service name="docker_label_helper">
+	<summary>Allows automatic duplication of labels with a custom prefix.</summary>
+	<description>Implements the PREFIXEDLABEL pseudo command for Dockerfile.</description>
+</service>

obs-service-docker_label_helper.changes

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+-------------------------------------------------------------------
+Fri Sep 11 10:07:44 UTC 2020 - Fabian Vogt <fvogt@suse.com>
+
+- Add documentation and a test
+
+-------------------------------------------------------------------
+Tue May  5 09:03:39 UTC 2020 - Fabian Vogt <fvogt@suse.com>
+
+- Initial commit

obs-service-docker_label_helper.spec

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+#
+# spec file for package obs-service-docker_label_helper
+#
+# Copyright (c) 2020 SUSE LLC
+#
+# All modifications and additions to the file contributed by third parties
+# remain the property of their copyright owners, unless otherwise agreed
+# upon. The license for this file, and modifications and additions to the
+# file, is the same license as for the pristine package itself (unless the
+# license for the pristine package is not an Open Source License, in which
+# case the license is the MIT License). An "Open Source License" is a
+# license that conforms to the Open Source Definition (Version 1.9)
+# published by the Open Source Initiative.
+
+# Please submit bugfixes or comments via https://bugs.opensuse.org/
+#
+
+
+Name:           obs-service-docker_label_helper
+Version:        0.0
+Release:        0
+Summary:        Service to duplicate labels with a custom prefix
+License:        GPL-2.0-or-later
+Group:          Development/Tools/Building
+URL:            https://build.opensuse.org
+Source0:        docker_label_helper.service
+Source1:        docker_label_helper
+Source2:        README
+Source3:        test.sh
+Requires:       gawk
+BuildArch:      noarch
+# For %check
+BuildRequires:  diffutils
+
+%description
+This service can be used during buildtime to implement the
+PREFIXEDLABEL instruction useful for building containers.
+
+%prep
+%setup -q -D -T -n .
+cp %{SOURCE2} .
+
+%build
+
+%install
+mkdir -p %{buildroot}%{_prefix}/lib/obs/service
+install -m 0644 %{SOURCE0} %{buildroot}%{_prefix}/lib/obs/service
+install -m 0755 %{SOURCE1} %{buildroot}%{_prefix}/lib/obs/service
+
+%check
+sh %{SOURCE3}
+
+%files
+%doc README
+%dir %{_prefix}/lib/obs
+%{_prefix}/lib/obs/service
+
+%changelog

test.sh

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+#!/bin/sh
+set -eu
+tmpdir=$(mktemp -d)
+trap 'rm -rf ${tmpdir}' EXIT
+
+script="$(realpath "$(dirname $0)")/docker_label_helper"
+
+cd $tmpdir
+
+cat >Dockerfile <<EOF
+# labelprefix=org.opensuse.nano
+PREFIXEDLABEL org.opencontainers.image.title="Example container"
+PREFIXEDLABEL org.opencontainers.image.description="This contains nano"
+EOF
+
+export BUILD_DIST=
+sh "${script}"
+
+diff -u Dockerfile - <<EOF
+LABEL org.opensuse.nano.title="Example container"
+LABEL org.opencontainers.image.title="Example container"
+LABEL org.opensuse.nano.description="This contains nano"
+LABEL org.opencontainers.image.description="This contains nano"
+EOF