gentoo-x86/eclass/apache-2.eclass

# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/apache-2.eclass,v 1.28 2012/03/29 15:35:04 patrick Exp $

# @ECLASS: apache-2.eclass
# @MAINTAINER:
# apache-devs@gentoo.org
# @BLURB: Provides a common set of functions for apache-2.x ebuilds
# @DESCRIPTION:
# This eclass handles apache-2.x ebuild functions such as LoadModule generation
# and inter-module dependency checking.

inherit autotools eutils flag-o-matic multilib ssl-cert

# ==============================================================================
# INTERNAL VARIABLES
# ==============================================================================

# @ECLASS-VARIABLE: GENTOO_PATCHNAME
# @DESCRIPTION:
# This internal variable contains the prefix for the patch tarball.
# Defaults to the full name and version (including revision) of the package.
# If you want to override this in an ebuild, use:
# ORIG_PR="(revision of Gentoo stuff you want)"
# GENTOO_PATCHNAME="gentoo-${PN}-${PV}${ORIG_PR:+-${ORIG_PR}}"
[[ -n "$GENTOO_PATCHNAME" ]] || GENTOO_PATCHNAME="gentoo-${PF}"

# @ECLASS-VARIABLE: GENTOO_PATCHDIR
# @DESCRIPTION:
# This internal variable contains the working directory where patches and config
# files are located.
# Defaults to the patchset name appended to the working directory.
[[ -n "$GENTOO_PATCHDIR" ]] || GENTOO_PATCHDIR="${WORKDIR}/${GENTOO_PATCHNAME}"

# @VARIABLE: GENTOO_DEVELOPER
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains the name of the
# gentoo developer who created the patch tarball

# @VARIABLE: GENTOO_PATCHSTAMP
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains the date the patch
# tarball was created at in YYYYMMDD format

# @VARIABLE: GENTOO_PATCH_A
# @DESCRIPTION:
# This variable should contain the entire filename of patch tarball.
# Defaults to the name of the patchset, with a datestamp.
[[ -n "$GENTOO_PATCH_A" ]] || GENTOO_PATCH_A="${GENTOO_PATCHNAME}-${GENTOO_PATCHSTAMP}.tar.bz2"

SRC_URI="mirror://apache/httpd/httpd-${PV}.tar.bz2
        http://dev.gentoo.org/~${GENTOO_DEVELOPER}/dist/apache/${GENTOO_PATCH_A}"

# @VARIABLE: IUSE_MPMS_FORK
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains a list of forking
# (i.e.  non-threaded) MPMs

# @VARIABLE: IUSE_MPMS_THREAD
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains a list of threaded
# MPMs

# @VARIABLE: IUSE_MODULES
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains a list of available
# built-in modules

IUSE_MPMS="${IUSE_MPMS_FORK} ${IUSE_MPMS_THREAD}"
IUSE="${IUSE} debug doc ldap selinux ssl static suexec threads"

for module in ${IUSE_MODULES} ; do
        IUSE="${IUSE} apache2_modules_${module}"
done

for mpm in ${IUSE_MPMS} ; do
        IUSE="${IUSE} apache2_mpms_${mpm}"
done

DEPEND="dev-lang/perl
        =dev-libs/apr-1*
        =dev-libs/apr-util-1*[ldap?]
        dev-libs/libpcre
        ldap? ( =net-nds/openldap-2* )
        selinux? ( sec-policy/selinux-apache )
        ssl? ( >=dev-libs/openssl-0.9.8f )
        !=www-servers/apache-1*"
RDEPEND="${DEPEND}"
PDEPEND="~app-admin/apache-tools-${PV}"

S="${WORKDIR}/httpd-${PV}"

# ==============================================================================
# INTERNAL FUNCTIONS
# ==============================================================================

# @ECLASS-VARIABLE: MY_MPM
# @DESCRIPTION:
# This internal variable contains the selected MPM after a call to setup_mpm()

# @FUNCTION: setup_mpm
# @DESCRIPTION:
# This internal function makes sure that only one of APACHE2_MPMS was selected
# or a default based on USE=threads is selected if APACHE2_MPMS is empty
setup_mpm() {
        MY_MPM=""
        for x in ${IUSE_MPMS} ; do
                if use apache2_mpms_${x} ; then
                        if [[ -z "${MY_MPM}" ]] ; then
                                MY_MPM=${x}
                                elog
                                elog "Selected MPM: ${MY_MPM}"
                                elog
                        else
                                eerror "You have selected more then one mpm USE-flag."
                                eerror "Only one MPM is supported."
                                die "more then one mpm was specified"
                        fi
                fi
        done

        if [[ -z "${MY_MPM}" ]] ; then
                if use threads ; then
                        MY_MPM=worker
                        elog
                        elog "Selected default threaded MPM: ${MY_MPM}"
                        elog
                else
                        MY_MPM=prefork
                        elog
                        elog "Selected default MPM: ${MY_MPM}"
                        elog
                fi
        fi

        if has ${MY_MPM} ${IUSE_MPMS_THREAD} && ! use threads ; then
                eerror "You have selected a threaded MPM but USE=threads is disabled"
                die "invalid use flag combination"
        fi

        if has ${MY_MPM} ${IUSE_MPMS_FORK} && use threads ; then
                eerror "You have selected a non-threaded MPM but USE=threads is enabled"
                die "invalid use flag combination"
        fi
}

# @VARIABLE: MODULE_CRITICAL
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains a space-separated
# list of modules critical for the default apache. A user may still
# disable these modules for custom minimal installation at their own risk.

# @FUNCTION: check_module_critical
# @DESCRIPTION:
# This internal function warns the user about modules critical for the default
# apache configuration.
check_module_critical() {
        local unsupported=0

        for m in ${MODULE_CRITICAL} ; do
                if ! has ${m} ${MY_MODS} ; then
                        ewarn "Module '${m}' is required in the default apache configuration."
                        unsupported=1
                fi
        done

        if [[ ${unsupported} -ne 0 ]] ; then
                ewarn
                ewarn "You have disabled one or more required modules"
                ewarn "for the default apache configuration."
                ewarn "Although this is not an error, please be"
                ewarn "aware that this setup is UNSUPPORTED."
                ewarn
                ebeep 10
        fi
}

# @VARIABLE: MODULE_DEPENDS
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains a space-separated
# list of dependency tokens each with a module and the module it depends on
# separated by a colon

# @FUNCTION: check_module_depends
# @DESCRIPTION:
# This internal function makes sure that all inter-module dependencies are
# satisfied with the current module selection
check_module_depends() {
        local err=0

        for m in ${MY_MODS} ; do
                for dep in ${MODULE_DEPENDS} ; do
                        if [[ "${m}" == "${dep%:*}" ]] ; then
                                if ! use apache2_modules_${dep#*:} ; then
                                        eerror "Module '${m}' depends on '${dep#*:}'"
                                        err=1
                                fi
                        fi
                done
        done

        if [[ ${err} -ne 0 ]] ; then
                die "invalid use flag combination"
        fi
}

# @ECLASS-VARIABLE: MY_CONF
# @DESCRIPTION:
# This internal variable contains the econf options for the current module
# selection after a call to setup_modules()

# @ECLASS-VARIABLE: MY_MODS
# @DESCRIPTION:
# This internal variable contains a sorted, space separated list of currently
# selected modules after a call to setup_modules()

# @FUNCTION: setup_modules
# @DESCRIPTION:
# This internal function selects all built-in modules based on USE flags and
# APACHE2_MODULES USE_EXPAND flags
setup_modules() {
        local mod_type=

        if use static ; then
                mod_type="static"
        else
                mod_type="shared"
        fi

        MY_CONF="--enable-so=static"

        if use ldap ; then
                MY_CONF="${MY_CONF} --enable-authnz_ldap=${mod_type} --enable-ldap=${mod_type}"
                MY_MODS="${MY_MODS} ldap authnz_ldap"
        else
                MY_CONF="${MY_CONF} --disable-authnz_ldap --disable-ldap"
        fi

        if use ssl ; then
                MY_CONF="${MY_CONF} --with-ssl=/usr --enable-ssl=${mod_type}"
                MY_MODS="${MY_MODS} ssl"
        else
                MY_CONF="${MY_CONF} --without-ssl --disable-ssl"
        fi

        if use suexec ; then
                elog "You can manipulate several configure options of suexec"
                elog "through the following environment variables:"
                elog
                elog " SUEXEC_SAFEPATH: Default PATH for suexec (default: /usr/local/bin:/usr/bin:/bin)"
                elog "  SUEXEC_LOGFILE: Path to the suexec logfile (default: /var/log/apache2/suexec_log)"
                elog "   SUEXEC_CALLER: Name of the user Apache is running as (default: apache)"
                elog "  SUEXEC_DOCROOT: Directory in which suexec will run scripts (default: /var/www)"
                elog "   SUEXEC_MINUID: Minimum UID, which is allowed to run scripts via suexec (default: 1000)"
                elog "   SUEXEC_MINGID: Minimum GID, which is allowed to run scripts via suexec (default: 100)"
                elog "  SUEXEC_USERDIR: User subdirectories (like /home/user/html) (default: public_html)"
                elog "    SUEXEC_UMASK: Umask for the suexec process (default: 077)"
                elog

                MY_CONF="${MY_CONF} --with-suexec-safepath=${SUEXEC_SAFEPATH:-/usr/local/bin:/usr/bin:/bin}"
                MY_CONF="${MY_CONF} --with-suexec-logfile=${SUEXEC_LOGFILE:-/var/log/apache2/suexec_log}"
                MY_CONF="${MY_CONF} --with-suexec-bin=/usr/sbin/suexec"
                MY_CONF="${MY_CONF} --with-suexec-userdir=${SUEXEC_USERDIR:-public_html}"
                MY_CONF="${MY_CONF} --with-suexec-caller=${SUEXEC_CALLER:-apache}"
                MY_CONF="${MY_CONF} --with-suexec-docroot=${SUEXEC_DOCROOT:-/var/www}"
                MY_CONF="${MY_CONF} --with-suexec-uidmin=${SUEXEC_MINUID:-1000}"
                MY_CONF="${MY_CONF} --with-suexec-gidmin=${SUEXEC_MINGID:-100}"
                MY_CONF="${MY_CONF} --with-suexec-umask=${SUEXEC_UMASK:-077}"
                MY_CONF="${MY_CONF} --enable-suexec=${mod_type}"
                MY_MODS="${MY_MODS} suexec"
        else
                MY_CONF="${MY_CONF} --disable-suexec"
        fi

        for x in ${IUSE_MODULES} ; do
                if use apache2_modules_${x} ; then
                        MY_CONF="${MY_CONF} --enable-${x}=${mod_type}"
                        MY_MODS="${MY_MODS} ${x}"
                else
                        MY_CONF="${MY_CONF} --disable-${x}"
                fi
        done

        # sort and uniquify MY_MODS
        MY_MODS=$(echo ${MY_MODS} | tr ' ' '\n' | sort -u)
        check_module_depends
        check_module_critical
}

# @VARIABLE: MODULE_DEFINES
# @DESCRIPTION:
# This variable needs to be set in the ebuild and contains a space-separated
# list of tokens each mapping a module to a runtime define which can be
# specified in APACHE2_OPTS in /etc/conf.d/apache2 to enable this particular
# module.

# @FUNCTION: generate_load_module
# @DESCRIPTION:
# This internal function generates the LoadModule lines for httpd.conf based on
# the current module selection and MODULE_DEFINES
generate_load_module() {
        local endit=0 mod_lines= mod_dir="${D}/usr/$(get_libdir)/apache2/modules"

        if use static; then
                sed -i -e "/%%LOAD_MODULE%%/d" \
                        "${GENTOO_PATCHDIR}"/conf/httpd.conf
                return
        fi

        for m in ${MY_MODS} ; do
                if [[ -e "${mod_dir}/mod_${m}.so" ]] ; then
                        for def in ${MODULE_DEFINES} ; do
                                if [[ "${m}" == "${def%:*}" ]] ; then
                                        mod_lines="${mod_lines}\n<IfDefine ${def#*:}>"
                                        endit=1
                                fi
                        done

                        mod_lines="${mod_lines}\nLoadModule ${m}_module modules/mod_${m}.so"

                        if [[ ${endit} -ne 0 ]] ; then
                                mod_lines="${mod_lines}\n</IfDefine>"
                                endit=0
                        fi
                fi
        done

        sed -i -e "s:%%LOAD_MODULE%%:${mod_lines}:" \
                "${GENTOO_PATCHDIR}"/conf/httpd.conf
}

# @FUNCTION: check_upgrade
# @DESCRIPTION:
# This internal function checks if the previous configuration file for built-in
# modules exists in ROOT and prevents upgrade in this case. Users are supposed
# to convert this file to the new APACHE2_MODULES USE_EXPAND variable and remove
# it afterwards.
check_upgrade() {
        if [[ -e "${ROOT}"etc/apache2/apache2-builtin-mods ]]; then
                eerror "The previous configuration file for built-in modules"
                eerror "(${ROOT}etc/apache2/apache2-builtin-mods) exists on your"
                eerror "system."
                eerror
                eerror "Please read http://www.gentoo.org/doc/en/apache-upgrading.xml"
                eerror "for detailed information how to convert this file to the new"
                eerror "APACHE2_MODULES USE_EXPAND variable."
                eerror
                die "upgrade not possible with existing ${ROOT}etc/apache2/apache2-builtin-mods"
        fi
}

# ==============================================================================
# EXPORTED FUNCTIONS
# ==============================================================================

# @FUNCTION: apache-2_pkg_setup
# @DESCRIPTION:
# This function selects built-in modules, the MPM and other configure options,
# creates the apache user and group and informs about CONFIG_SYSVIPC being
# needed (we don't depend on kernel sources and therefore cannot check).
apache-2_pkg_setup() {
        check_upgrade

        # setup apache user and group
        enewgroup apache 81
        enewuser apache 81 -1 /var/www apache

        setup_mpm
        setup_modules

        if use debug; then
                MY_CONF="${MY_CONF} --enable-maintainer-mode --enable-exception-hook"
        fi

        elog "Please note that you need SysV IPC support in your kernel."
        elog "Make sure CONFIG_SYSVIPC=y is set."
        elog

        if use userland_BSD; then
                elog "On BSD systems you need to add the following line to /boot/loader.conf:"
                elog "  accf_http_load=\"YES\""
                elog
        fi
}

# @FUNCTION: apache-2_src_prepare
# @DESCRIPTION:
# This function applies patches, configures a custom file-system layout and
# rebuilds the configure scripts.
apache-2_src_prepare() {
        # 03_all_gentoo-apache-tools.patch injects -Wl,-z,now, which is not a good
        # idea for everyone
        case ${CHOST} in
                *-linux-gnu|*-solaris*|*-freebsd*)
                        # do nothing, these use GNU binutils
                        :
                ;;
                *-darwin*)
                        sed -i -e 's/-Wl,-z,now/-Wl,-bind_at_load/g' \
                                "${GENTOO_PATCHDIR}"/patches/03_all_gentoo_apache-tools.patch
                ;;
                *)
                        # patch it out to be like upstream
                        sed -i -e 's/-Wl,-z,now//g' \
                                "${GENTOO_PATCHDIR}"/patches/03_all_gentoo_apache-tools.patch
                ;;
        esac

        # Use correct multilib libdir in gentoo patches
        sed -i -e "s:/usr/lib:/usr/$(get_libdir):g" \
                "${GENTOO_PATCHDIR}"/{conf/httpd.conf,init/*,patches/config.layout} \
                || die "libdir sed failed"

        epatch "${GENTOO_PATCHDIR}"/patches/*.patch

        # setup the filesystem layout config
        cat "${GENTOO_PATCHDIR}"/patches/config.layout >> "${S}"/config.layout || \
                die "Failed preparing config.layout!"
        sed -i -e "s:version:${PF}:g" "${S}"/config.layout

        # apache2.8 instead of httpd.8 (bug #194828)
        mv docs/man/{httpd,apache2}.8
        sed -i -e 's/httpd\.8/apache2.8/g' Makefile.in

        # patched-in MPMs need the build environment rebuilt
        sed -i -e '/sinclude/d' configure.in
        AT_M4DIR=build eautoreconf
}

# @FUNCTION: apache-2_src_configure
# @DESCRIPTION:
# This function adds compiler flags and runs econf and emake based on MY_MPM and
# MY_CONF
apache-2_src_configure() {
        # Instead of filtering --as-needed (bug #128505), append --no-as-needed
        # Thanks to Harald van Dijk
        append-ldflags $(no-as-needed)

        # peruser MPM debugging with -X is nearly impossible
        if has peruser ${IUSE_MPMS} && use apache2_mpms_peruser ; then
                use debug && append-flags -DMPM_PERUSER_DEBUG
        fi

        # econf overwrites the stuff from config.layout, so we have to put them into
        # our myconf line too
        econf \
                --includedir=/usr/include/apache2 \
                --libexecdir=/usr/$(get_libdir)/apache2/modules \
                --datadir=/var/www/localhost \
                --sysconfdir=/etc/apache2 \
                --localstatedir=/var \
                --with-mpm=${MY_MPM} \
                --with-apr=/usr \
                --with-apr-util=/usr \
                --with-pcre=/usr \
                --with-z=/usr \
                --with-port=80 \
                --with-program-name=apache2 \
                --enable-layout=Gentoo \
                ${MY_CONF} || die "econf failed!"

        sed -i -e 's:apache2\.conf:httpd.conf:' include/ap_config_auto.h
}

# @FUNCTION: apache-2_src_install
# @DESCRIPTION:
# This function runs `emake install' and generates, installs and adapts the gentoo
# specific configuration files found in the tarball
apache-2_src_install() {
        emake DESTDIR="${D}" MKINSTALLDIRS="mkdir -p" install || die "make install failed"

        # install our configuration files
        keepdir /etc/apache2/vhosts.d
        keepdir /etc/apache2/modules.d

        generate_load_module
        insinto /etc/apache2
        doins -r "${GENTOO_PATCHDIR}"/conf/*
        use apache2_modules_mime_magic && doins docs/conf/magic

        insinto /etc/logrotate.d
        newins "${GENTOO_PATCHDIR}"/scripts/apache2-logrotate apache2

        # generate a sane default APACHE2_OPTS
        APACHE2_OPTS="-D DEFAULT_VHOST -D INFO"
        use doc && APACHE2_OPTS="${APACHE2_OPTS} -D MANUAL"
        use ssl && APACHE2_OPTS="${APACHE2_OPTS} -D SSL -D SSL_DEFAULT_VHOST"
        use suexec && APACHE2_OPTS="${APACHE2_OPTS} -D SUEXEC"
        if has negotiation ${APACHE2_MODULES} && use apache2_modules_negotiation; then
                APACHE2_OPTS="${APACHE2_OPTS} -D LANGUAGE"
        fi

        sed -i -e "s:APACHE2_OPTS=\".*\":APACHE2_OPTS=\"${APACHE2_OPTS}\":" \
                "${GENTOO_PATCHDIR}"/init/apache2.confd || die "sed failed"

        newconfd "${GENTOO_PATCHDIR}"/init/apache2.confd apache2
        newinitd "${GENTOO_PATCHDIR}"/init/apache2.initd apache2

        # install apache2ctl wrapper for our init script if available
        if test -e "${GENTOO_PATCHDIR}"/scripts/apache2ctl; then
                exeinto /usr/sbin
                doexe "${GENTOO_PATCHDIR}"/scripts/apache2ctl
        else
                dosym /etc/init.d/apache2 /usr/sbin/apache2ctl
        fi

        # provide legacy symlink for apxs, bug 177697
        dosym /usr/sbin/apxs /usr/sbin/apxs2

        # install some documentation
        dodoc ABOUT_APACHE CHANGES LAYOUT README README.platforms VERSIONING
        dodoc "${GENTOO_PATCHDIR}"/docs/*

        # drop in a convenient link to the manual
        if use doc ; then
                sed -i -e "s:VERSION:${PVR}:" "${D}/etc/apache2/modules.d/00_apache_manual.conf"
        else
                rm -f "${D}/etc/apache2/modules.d/00_apache_manual.conf"
                rm -Rf "${D}/usr/share/doc/${PF}/manual"
        fi

        # the default icons and error pages get stored in
        # /usr/share/apache2/{error,icons}
        dodir /usr/share/apache2
        mv -f "${D}/var/www/localhost/error" "${D}/usr/share/apache2/error"
        mv -f "${D}/var/www/localhost/icons" "${D}/usr/share/apache2/icons"
        rm -rf "${D}/var/www/localhost/"
        eend $?

        # set some sane permissions for suexec
        if use suexec ; then
                fowners 0:${SUEXEC_CALLER:-apache} /usr/sbin/suexec
                fperms 4710 /usr/sbin/suexec
                # provide legacy symlink for suexec, bug 177697
                dosym /usr/sbin/suexec /usr/sbin/suexec2
        fi

        # empty dirs
        for i in /var/lib/dav /var/log/apache2 /var/cache/apache2 ; do
                keepdir ${i}
                fowners apache:apache ${i}
                fperms 0750 ${i}
        done
}

# @FUNCTION: apache-2_pkg_postinst
# @DESCRIPTION:
# This function creates test certificates if SSL is enabled and installs the
# default index.html to /var/www/localhost if it does not exist. We do this here
# because the default webroot is a copy of the files that exist elsewhere and we
# don't want them to be managed/removed by portage when apache is upgraded.
apache-2_pkg_postinst() {
        # fix previously wrong set permissions Bug#398899
        einfo "Sanitizing directory permissions ..."
        for i in /var/lib/dav /var/log/apache2 /var/cache/apache2 ; do
                chmod 0750 ${i}
        done

        if use ssl && [[ ! -e "${ROOT}/etc/ssl/apache2/server.pem" ]]; then
                SSL_ORGANIZATION="${SSL_ORGANIZATION:-Apache HTTP Server}"
                install_cert /etc/ssl/apache2/server
                ewarn
                ewarn "The location of SSL certificates has changed. If you are"
                ewarn "upgrading from ${CATEGORY}/${PN}-2.2.13 or earlier (or remerged"
                ewarn "*any* apache version), you might want to move your old"
                ewarn "certificates from /etc/apache2/ssl/ to /etc/ssl/apache2/ and"
                ewarn "update your config files."
                ewarn
        fi

        if [[ ! -e "${ROOT}/var/www/localhost" ]] ; then
                mkdir -p "${ROOT}/var/www/localhost/htdocs"
                echo "<html><body><h1>It works!</h1></body></html>" > "${ROOT}/var/www/localhost/htdocs/index.html"
        fi

        echo
        elog "Attention: cgi and cgid modules are now handled via APACHE2_MODULES flags"
        elog "in /etc/make.conf. Make sure to enable those in order to compile them."
        elog "In general, you should use 'cgid' with threaded MPMs and 'cgi' otherwise."
        echo

}

EXPORT_FUNCTIONS pkg_setup src_prepare src_configure src_install pkg_postinst