gentoo-overlay/eclass

# Copyright 1999-2021 Gentoo Authors

# Distributed under the terms of the GNU General Public License v2



# @ECLASS: readme.gentoo-r1.eclass

# @MAINTAINER:

# Pacho Ramos <pacho@gentoo.org>

# @AUTHOR:

# Author: Pacho Ramos <pacho@gentoo.org>

# @SUPPORTED_EAPIS: 6 7 8

# @BLURB: install a doc file shown via elog messages

# @DESCRIPTION:

# An eclass for installing a README.gentoo doc file recording tips

# shown via elog messages. With this eclass, those elog messages will only be

# shown at first package installation and a file for later reviewing will be

# installed under /usr/share/doc/${PF}

#

# You need to call readme.gentoo_create_doc in src_install phase and

# readme.gentoo_print_elog in pkg_postinst



if [[ -z ${_README_GENTOO_ECLASS} ]]; then

_README_GENTOO_ECLASS=1



case ${EAPI} in

	6|7|8) ;;

	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;

esac



# @ECLASS-VARIABLE: DISABLE_AUTOFORMATTING

# @DEFAULT_UNSET

# @DESCRIPTION:

# If non-empty, DOC_CONTENTS information will be strictly respected,

# not getting it automatically formatted by fmt. If empty, it will

# rely on fmt for formatting and 'echo -e' options to tweak lines a bit.



# @ECLASS-VARIABLE: FORCE_PRINT_ELOG

# @DEFAULT_UNSET

# @DESCRIPTION:

# If non-empty this variable forces elog messages to be printed.



# @ECLASS-VARIABLE: README_GENTOO_SUFFIX

# @DESCRIPTION:

# If you want to specify a suffix for README.gentoo file please export it.

: ${README_GENTOO_SUFFIX:=""}



# @FUNCTION: readme.gentoo_create_doc

# @DESCRIPTION:

# Create doc file with ${DOC_CONTENTS} variable (preferred) and, if not set,

# look for "${FILESDIR}/README.gentoo" contents. You can use

# ${FILESDIR}/README.gentoo-${SLOT} also.

# Usually called at src_install phase.

readme.gentoo_create_doc() {

	debug-print-function ${FUNCNAME} "${@}"



	if [[ -n "${DOC_CONTENTS}" ]]; then

		if [[ -n "${DISABLE_AUTOFORMATTING}" ]]; then

			echo "${DOC_CONTENTS}" > "${T}"/README.gentoo || die

		else

			local saved_flags=$-

			set -f				# disable filename expansion in echo arguments

			echo -e ${DOC_CONTENTS} | fold -s -w 70 \

				| sed 's/[[:space:]]*$//' > "${T}"/README.gentoo

			assert

			set +f -${saved_flags}

		fi

	elif [[ -f "${FILESDIR}/README.gentoo-${SLOT%/*}" ]]; then

		cp "${FILESDIR}/README.gentoo-${SLOT%/*}" "${T}"/README.gentoo || die

	elif [[ -f "${FILESDIR}/README.gentoo${README_GENTOO_SUFFIX}" ]]; then

		cp "${FILESDIR}/README.gentoo${README_GENTOO_SUFFIX}" "${T}"/README.gentoo || die

	else

		die "You are not specifying README.gentoo contents!"

	fi



	( # subshell to avoid pollution of calling environment

		docinto .

		dodoc "${T}"/README.gentoo

	) || die

	README_GENTOO_DOC_VALUE=$(< "${T}/README.gentoo")

}



# @FUNCTION: readme.gentoo_print_elog

# @DESCRIPTION:

# Print elog messages with "${T}"/README.gentoo contents. They will be

# shown only when package is installed at first time.

# Usually called at pkg_postinst phase.

#

# If you want to show them always, please set FORCE_PRINT_ELOG to a non empty

# value in your ebuild before this function is called.

# This can be useful when, for example, DOC_CONTENTS is modified, then, you can

# rely on specific REPLACING_VERSIONS handling in your ebuild to print messages

# when people update from versions still providing old message.

readme.gentoo_print_elog() {

	debug-print-function ${FUNCNAME} "${@}"



	if [[ -z "${README_GENTOO_DOC_VALUE}" ]]; then

		die "readme.gentoo_print_elog invoked without matching readme.gentoo_create_doc call!"

	elif ! [[ -n "${REPLACING_VERSIONS}" ]] || [[ -n "${FORCE_PRINT_ELOG}" ]]; then

		echo -e "${README_GENTOO_DOC_VALUE}" | while read -r ELINE; do elog "${ELINE}"; done

		elog ""

		elog "(Note: Above message is only printed the first time package is"

		elog "installed. Please look at ${EPREFIX}/usr/share/doc/${PF}/README.gentoo*"

		elog "for future reference)"

	fi

}



fi