dev-util/packer: new package

Adding Hashicorp's packer utility to better support automated image
building. One can find documentation here: https://packer.io and find
the code base here: https://github.com/hashicorp/packer

Closes: gentoo#10744
Closes: https://bugs.gentoo.org/624472
Package-Manager: Portage-2.3.54, Repoman-2.3.12
Signed-off-by: Dan Molik <[email protected]>
Tested-by: Dan Molik <[email protected]>
Signed-off-by: Georgy Yakovlev <[email protected]>

dev-util/packer/Manifest

@@ -0,0 +1 @@
+DIST packer-1.3.3.tar.gz 8988302 BLAKE2B d6357624f7aa8af73961be9b8f75ec36650d3ccbf299ccdb85776699332fcaa90ff38349837f17962b9587cbbd051a75b0f3429b4459ee9aa46f2a897a3511ed SHA512 fc8965fc4c71d12e2d4bf0c2c7cb565834205749390cdbb879acb23143d4b7f4c566b6513afbec61ad73bf3e08a551ce001367ffad105dba68b72f2092d4bb97

dev-util/packer/metadata.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>[email protected]</email>
+		<name>Dan Molik</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>[email protected]</email>
+		<name>Proxy Maintainers</name>
+	</maintainer>
+	<longdescription lang="en">
+		Packer is an open source tool for creating identical machine images for
+		multiple platforms from a single source configuration. Packer is lightweight,
+		runs on every major operating system, and is highly performant, creating
+		machine images for multiple platforms in parallel. Packer does not replace
+		configuration management like Chef or Puppet. In fact, when building images,
+		Packer is able to use tools like Chef or Puppet to install software onto the
+		image.
+
+		A machine image is a single static unit that contains a pre-configured
+		operating system and installed software which is used to quickly create new
+		running machines. Machine image formats change for each platform. Some
+		examples include AMIs for EC2, VMDK/VMX files for VMware, OVF exports for
+		VirtualBox, etc.
+	</longdescription>
+	<upstream>
+		<changelog>https://github.com/hashicorp/packer/blob/master/CHANGELOG.md</changelog>
+		<remote-id type="github">hashicorp/packer</remote-id>
+	</upstream>
+</pkgmetadata>

dev-util/packer/packer-1.3.3.ebuild

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+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit golang-vcs-snapshot
+
+DESCRIPTION="A tool to create identical machine images for multiple platforms"
+HOMEPAGE="https://www.packer.io"
+
+EGO_PN="github.com/hashicorp/packer"
+SRC_URI="https://github.com/hashicorp/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MPL-2.0"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE=""
+DEPEND=">=dev-lang/go-1.11.0"
+
+DOCS="README.md CHANGELOG.md"
+
+src_compile() {
+	cd "src/${EGO_PN}" || die
+	GOPATH="${S}" GOCACHE="${T}/go-cache" go build \
+		-v -work -o "${S}/${PN}" ./ || die
+}
+
+src_install() {
+	dobin packer
+
+	pushd "src/${EGO_PN}" || die
+	einstalldocs
+	insinto /usr/share/zsh/site-functions
+	doins contrib/zsh-completion/_packer
+	popd || die
+}