net-printer/brother-dcp1610w-bin: ebuild overhaul

Follows guidelines of PR #88.

The CUPS driver is now compiled from GPL source code.

NOTES
=====

CUPS driver, PPD file, and filter wrapper:
- As of now, in the official download site, there's no GPL package
  available for this printer (aka source code).
- The CUPS driver is compiled from DCP-1510's source code, since the
  binary distributions provide the same driver.
- The PPD file and filter wrapper are from the binary distribution.

The notes of the latest DCP1510 commit apply here too, just exchange
DCP1510 with DCP1610W (i.e. filter_DCP1510 -> filter_DCP1610W, etc.).

net-print/brother-dcp1610w-bin/Manifest

@@ -1,2 +1,3 @@
+DIST dcp1510cupswrapper-GPL_src-3.0.1-1.tar.gz 17511 BLAKE2B 60c35fbfc526fc0732bc32865c5f4971df9265496e5a4f488bdf33832733d27efbe93a70e8b5641ed5010763a9e6c003f534df00adacad9d896d8bd7567d666e SHA512 f9a6d7b38ef988231e676ac4a3663281700a26d1f2f8ca63f12903906ce4f0dc5bae25c5e6bc4ac1fb0e191a9c21b6cff81b357c2a9f5e9263924fbcdffac518
 DIST dcp1610wcupswrapper-3.0.1-1.i386.rpm 19008 BLAKE2B 09540ae34457ac3b385133b9c850913fc29fa7fff71701480a76f8bc952da14555a82bf9c574e69dee308b55bfcf6e72fe494dfd083f5522929ee6b7fa98d8fd SHA512 c472c4d33a9d07da9cbb4a16a23aa046ad8f91589a43aadb22098a6862379653883aa060778e26c6b84c93fc3cd3037184434978f744b4a7250e83b903a1dc1b
 DIST dcp1610wlpr-3.0.1-1.i386.rpm 37664 BLAKE2B d5a7ff59b02e07f9af6bc97bf452a47c20c24bc5a000b297680d3a74579fe0d550cfa188d0eb136b09caadbf8e0fd6eb9e44f1f796398a5a992101333340cea3 SHA512 8c10da582d28fb5ef129e3959258f69713b316813592ed832858cc938fb80b131bc4927437d7026c6446f89f286d8453da1ba2939157a145bcafa27e6efa2736

net-print/brother-dcp1610w-bin/brother-dcp1610w-bin-3.0.1_p1.ebuild

@@ -0,0 +1,115 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit eutils rpm linux-info
+
+BR_PN="${PN/brother-/}"
+BR_PN="${BR_PN/-bin/}"
+BR_PV="${PV/-${PR}/}"
+BR_PV="${BR_PV/_p/-}"
+
+MODEL="${BR_PN^^}"
+
+DESCRIPTION="Brother printer driver for DCP-1610W"
+HOMEPAGE="http://support.brother.com"
+SRC_URI="http://download.brother.com/welcome/dlf101535/${BR_PN}lpr-${BR_PV}.i386.rpm
+	http://download.brother.com/welcome/dlf101534/${BR_PN}cupswrapper-${BR_PV}.i386.rpm
+	http://www.brother.com/pub/bsc/linux/dlf/dcp1510cupswrapper-GPL_src-${BR_PV}.tar.gz"
+
+LICENSE="GPL-2 brother-eula no-source-code"
+SLOT="0"
+KEYWORDS="amd64 x86"
+IUSE="+metric debug"
+RESTRICT="mirror strip"
+
+DEPEND="net-print/cups"
+RDEPEND="${DEPEND}
+	app-text/ghostscript-gpl
+	app-text/a2ps"
+
+S="${WORKDIR}"
+PAPER_TYPE="Letter"
+DEST="/opt/brother/Printers/${MODEL}"
+CUPS_PPD_PATH="/usr/share/cups/model/brother"
+CUPS_FILTER_PATH="/usr/libexec/cups/filter"
+RC_FILE="br${MODEL}rc"
+PPD_FILE="brother-${MODEL}-cups-en.ppd"
+CUPS_WRAPPER="brother_lpdwrapper_${MODEL}"
+SRC_LPR_DIR="${S}${DEST}"
+SRC_CUPS_DIR="${S}/dcp1510cupswrapper-GPL_src-${BR_PV}"
+
+pkg_setup() {
+	CONFIG_CHECK=""
+	if use amd64; then
+		CONFIG_CHECK="${CONFIG_CHECK} ~IA32_EMULATION"
+	fi
+
+	linux-info_pkg_setup
+}
+
+src_prepare() {
+	default
+
+	# Install CUPS PPD and filter wrapper to their respective locations
+	mkdir -p "${S}${CUPS_PPD_PATH}" || die "Creating CUPS PPD install location failed"
+	mv "${SRC_LPR_DIR}/cupswrapper/${PPD_FILE}" "${S}${CUPS_PPD_PATH}/${MODEL}.ppd" || die "Preparing CUPS PPD file failed"
+	mkdir -p "${S}${CUPS_FILTER_PATH}" || die "Creating CUPS filter wrapper install location failed"
+	mv "${SRC_LPR_DIR}/cupswrapper/${CUPS_WRAPPER}" "${S}${CUPS_FILTER_PATH}" || die "Preparing CUPS filter wrapper failed"
+
+	einfo "Fixing ${CUPS_WRAPPER} PPD file path"
+	sed -i "s|/usr/share/cups/model/|${CUPS_PPD_PATH}/|" \
+		"${S}${CUPS_FILTER_PATH}/${CUPS_WRAPPER}" || die "Fixing ${CUPS_WRAPPER} PPD file path failed"
+}
+
+src_configure() {
+	if use metric; then
+		PAPER_TYPE="A4"
+	fi
+
+	sed -ri "s/^(PaperType=).*$/\1${PAPER_TYPE}/" \
+		"${SRC_LPR_DIR}/inf/${RC_FILE}" || die "Changing LPR paper type in rc file failed"
+
+	if use debug; then
+		sed -i -e 's:^\(DEBUG\)=0:\1=1:' \
+			"${S}${CUPS_FILTER_PATH}/${CUPS_WRAPPER}" || die "Enabling CUPS filter wrapper debug output failed"
+	fi
+}
+
+src_compile() {
+	cd "${SRC_CUPS_DIR}/brcupsconfig"
+	emake brcupsconfig
+}
+
+src_install() {
+	insinto "${DEST}"
+	doins -r "${SRC_LPR_DIR}/"* || die
+	fperms -R 755 "${DEST}/lpd" || die
+	fperms 755 "${DEST}/inf/braddprinter" || die
+	fperms 755 "${DEST}/inf/setupPrintcap" || die
+
+	exeinto "${DEST}/cupswrapper"
+	newexe "${SRC_CUPS_DIR}/brcupsconfig/brcupsconfig" brcupsconfig4 || die
+
+	insinto "${CUPS_PPD_PATH}"
+	doins "${S}${CUPS_PPD_PATH}/"* || die
+
+	exeinto "${CUPS_FILTER_PATH}"
+	doexe "${S}${CUPS_FILTER_PATH}/"* || die
+}
+
+pkg_postinst() {
+	elog "Set paper type to ${PAPER_TYPE} in ${DEST}/inf/${RC_FILE}."
+	elog
+	if use debug; then
+		elog "Set DEBUG=1 in ${CUPS_FILTER_PATH}/${CUPS_WRAPPER}."
+		elog
+	fi
+	elog "Debug output can be controlled setting the DEBUG var in"
+	elog "${CUPS_FILTER_PATH}/${CUPS_WRAPPER}."
+	elog "Allowed values go from 0 (no debug) to 4. The script is"
+	elog "able to accept the option force-debug=<level 1 to 4>."
+	elog
+	elog "A log file will be saved in /tmp when DEBUG is set."
+}

net-print/brother-dcp1610w-bin/metadata.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
-<!--
-# $Id$
--->
 <pkgmetadata>
-<longdescription>Printer driver for Brother DCP-1610W</longdescription>
-<use>
-</use>
+  <!-- maintainer-needed -->
+  <longdescription>Brother DCP-1610W lpr+cupswrapper (printer) drivers</longdescription>
+  <use>
+    <flag name="metric">Use A4 as default paper type, instead of Letter.</flag>
+    <flag name="debug">Default DEBUG=1 in wrapper script to save a log in /tmp</flag>
+  </use>
 </pkgmetadata>