path: root/eclass/eutils.eclass

# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: eutils.eclass
# @MAINTAINER:
# base-system@gentoo.org
# @SUPPORTED_EAPIS: 0 1 2 3 4 5 6 7
# @BLURB: many extra (but common) functions that are used in ebuilds
# @DESCRIPTION:
# The eutils eclass contains a suite of functions that complement
# the ones that ebuild.sh already contain.  The idea is that the functions
# are not required in all ebuilds but enough utilize them to have a common
# home rather than having multiple ebuilds implementing the same thing.
#
# Due to the nature of this eclass, some functions may have maintainers
# different from the overall eclass!
#
# This eclass is DEPRECATED and must not be inherited by any new ebuilds
# or eclasses.  Use the more specific split eclasses instead, or native
# package manager functions when available.

# @ECLASS-VARIABLE: _EUTILS_ECLASS
# @INTERNAL
# @DESCRIPTION:
# Please document me

if [[ -z ${_EUTILS_ECLASS} ]]; then
_EUTILS_ECLASS=1

# implicitly inherited (now split) eclasses
case ${EAPI:-0} in
	0|1|2|3|4|5|6)
		inherit desktop edos2unix epatch estack l10n ltprune multilib \
			preserve-libs toolchain-funcs vcs-clean wrapper
		;;
	7) inherit edos2unix l10n wrapper ;;
	*) die "${ECLASS} is banned in EAPI ${EAPI}" ;;
esac

# @FUNCTION: emktemp
# @USAGE: [temp dir]
# @DESCRIPTION:
# Cheap replacement for when coreutils (and thus mktemp) does not exist
# on the user's system.
emktemp() {
	eqawarn "emktemp is deprecated. Create a temporary file in \${T} instead."

	local exe="touch"
	[[ $1 == -d ]] && exe="mkdir" && shift
	local topdir=$1

	if [[ -z ${topdir} ]] ; then
		[[ -z ${T} ]] \
			&& topdir="/tmp" \
			|| topdir=${T}
	fi

	if ! type -P mktemp > /dev/null ; then
		# system lacks `mktemp` so we have to fake it
		local tmp=/
		while [[ -e ${tmp} ]] ; do
			tmp=${topdir}/tmp.${RANDOM}.${RANDOM}.${RANDOM}
		done
		${exe} "${tmp}" || ${exe} -p "${tmp}"
		echo "${tmp}"
	else
		# the args here will give slightly wierd names on BSD,
		# but should produce a usable file on all userlands
		if [[ ${exe} == "touch" ]] ; then
			TMPDIR="${topdir}" mktemp -t tmp.XXXXXXXXXX
		else
			TMPDIR="${topdir}" mktemp -dt tmp.XXXXXXXXXX
		fi
	fi
}

# @FUNCTION: path_exists
# @DESCRIPTION:
# Warn that function has been removed

path_exists() {
	eerror "path_exists has been removed.  Please see the following post"
	eerror "for a replacement snippet:"
	eerror "https://blogs.gentoo.org/mgorny/2018/08/09/inlining-path_exists/"
	die "path_exists is banned"
}

# @FUNCTION: use_if_iuse
# @USAGE: <flag>
# @DESCRIPTION:
# Return true if the given flag is in USE and IUSE.
#
# Note that this function should not be used in the global scope.
use_if_iuse() {
	eqawarn "use_if_iuse is deprecated."
	eqawarn "Define it as a local function, or inline it:"
	eqawarn "    in_iuse foo && use foo"
	in_iuse $1 || return 1
	use $1
}

case ${EAPI:-0} in
0|1|2|3|4)

# @FUNCTION: usex
# @USAGE: <USE flag> [true output] [false output] [true suffix] [false suffix]
# @DESCRIPTION:
# Proxy to declare usex for package managers or EAPIs that do not provide it
# and use the package manager implementation when available (i.e. EAPI >= 5).
# If USE flag is set, echo [true output][true suffix] (defaults to "yes"),
# otherwise echo [false output][false suffix] (defaults to "no").
usex() { use "$1" && echo "${2-yes}$4" || echo "${3-no}$5" ; } #382963

;;
esac

case ${EAPI:-0} in
0|1|2|3|4|5)

# @FUNCTION: einstalldocs
# @DESCRIPTION:
# Install documentation using DOCS and HTML_DOCS, in EAPIs that do not
# provide this function.  When available (i.e., in EAPI 6 or later),
# the package manager implementation should be used instead.
#
# If DOCS is declared and non-empty, all files listed in it are
# installed.  The files must exist, otherwise the function will fail.
# In EAPI 4 and 5, DOCS may specify directories as well; in earlier
# EAPIs using directories is unsupported.
#
# If DOCS is not declared, the files matching patterns given
# in the default EAPI implementation of src_install will be installed.
# If this is undesired, DOCS can be set to empty value to prevent any
# documentation from being installed.
#
# If HTML_DOCS is declared and non-empty, all files and/or directories
# listed in it are installed as HTML docs (using dohtml).
#
# Both DOCS and HTML_DOCS can either be an array or a whitespace-
# separated list. Whenever directories are allowed, '<directory>/.' may
# be specified in order to install all files within the directory
# without creating a sub-directory in docdir.
#
# Passing additional options to dodoc and dohtml is not supported.
# If you needed such a thing, you need to call those helpers explicitly.
einstalldocs() {
	debug-print-function ${FUNCNAME} "${@}"

	local dodoc_opts=-r
	has ${EAPI} 0 1 2 3 && dodoc_opts=

	if ! declare -p DOCS &>/dev/null ; then
		local d
		for d in README* ChangeLog AUTHORS NEWS TODO CHANGES \
				THANKS BUGS FAQ CREDITS CHANGELOG ; do
			if [[ -s ${d} ]] ; then
				dodoc "${d}" || die
			fi
		done
	elif [[ $(declare -p DOCS) == "declare -a"* ]] ; then
		if [[ ${DOCS[@]} ]] ; then
			dodoc ${dodoc_opts} "${DOCS[@]}" || die
		fi
	else
		if [[ ${DOCS} ]] ; then
			dodoc ${dodoc_opts} ${DOCS} || die
		fi
	fi

	if [[ $(declare -p HTML_DOCS 2>/dev/null) == "declare -a"* ]] ; then
		if [[ ${HTML_DOCS[@]} ]] ; then
			dohtml -r "${HTML_DOCS[@]}" || die
		fi
	else
		if [[ ${HTML_DOCS} ]] ; then
			dohtml -r ${HTML_DOCS} || die
		fi
	fi

	return 0
}

# @FUNCTION: in_iuse
# @USAGE: <flag>
# @DESCRIPTION:
# Determines whether the given flag is in IUSE.  Strips IUSE default
# prefixes as necessary.  In EAPIs where it is available (i.e., EAPI 6
# or later), the package manager implementation should be used instead.
#
# Note that this function must not be used in the global scope.
in_iuse() {
	debug-print-function ${FUNCNAME} "${@}"
	[[ ${#} -eq 1 ]] || die "Invalid args to ${FUNCNAME}()"

	local flag=${1}
	local liuse=( ${IUSE} )

	has "${flag}" "${liuse[@]#[+-]}"
}

;;
esac

case ${EAPI:-0} in
0|1|2|3|4|5|6)

# @FUNCTION: eqawarn
# @USAGE: [message]
# @DESCRIPTION:
# Proxy to ewarn for package managers that don't provide eqawarn and use the PM
# implementation if available. Reuses PORTAGE_ELOG_CLASSES as set by the dev
# profile.
if ! declare -F eqawarn >/dev/null ; then
	eqawarn() {
		has qa ${PORTAGE_ELOG_CLASSES} && ewarn "$@"
		:
	}
fi

;;
esac

fi