# Copyright 1999-2021 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 # @ECLASS: epatch.eclass # @MAINTAINER: # base-system@gentoo.org # @SUPPORTED_EAPIS: 0 1 2 3 4 5 6 # @BLURB: easy patch application functions # @DEPRECATED: eapply from EAPI 7 # @DESCRIPTION: # An eclass providing epatch and epatch_user functions to easily apply # patches to ebuilds. Mostly superseded by eapply* in EAPI 6. if [[ -z ${_EPATCH_ECLASS} ]]; then case ${EAPI:-0} in 0|1|2|3|4|5|6) ;; *) die "${ECLASS}: banned in EAPI=${EAPI}; use eapply* instead";; esac inherit estack # @VARIABLE: EPATCH_SOURCE # @DESCRIPTION: # Default directory to search for patches. EPATCH_SOURCE="${WORKDIR}/patch" # @VARIABLE: EPATCH_SUFFIX # @DESCRIPTION: # Default extension for patches (do not prefix the period yourself). EPATCH_SUFFIX="patch.bz2" # @VARIABLE: EPATCH_OPTS # @DESCRIPTION: # Options to pass to patch. Meant for ebuild/package-specific tweaking # such as forcing the patch level (-p#) or fuzz (-F#) factor. Note that # for single patch tweaking, you can also pass flags directly to epatch. EPATCH_OPTS="" # @VARIABLE: EPATCH_COMMON_OPTS # @DESCRIPTION: # Common options to pass to `patch`. You probably should never need to # change these. If you do, please discuss it with base-system first to # be sure. # @CODE # -g0 - keep RCS, ClearCase, Perforce and SCCS happy #24571 # --no-backup-if-mismatch - do not leave .orig files behind # -E - automatically remove empty files # @CODE EPATCH_COMMON_OPTS="-g0 -E --no-backup-if-mismatch" # @VARIABLE: EPATCH_EXCLUDE # @DESCRIPTION: # List of patches not to apply. Note this is only file names, # and not the full path. Globs accepted. EPATCH_EXCLUDE="" # @VARIABLE: EPATCH_SINGLE_MSG # @DESCRIPTION: # Change the printed message for a single patch. EPATCH_SINGLE_MSG="" # @VARIABLE: EPATCH_MULTI_MSG # @DESCRIPTION: # Change the printed message for multiple patches. EPATCH_MULTI_MSG="Applying various patches (bugfixes/updates) ..." # @VARIABLE: EPATCH_FORCE # @DESCRIPTION: # Only require patches to match EPATCH_SUFFIX rather than the extended # arch naming style. EPATCH_FORCE="no" # @VARIABLE: EPATCH_USER_EXCLUDE # @DEFAULT_UNSET # @DESCRIPTION: # List of patches not to apply. Note this is only file names, # and not the full path. Globs accepted. # @FUNCTION: epatch # @USAGE: [options] [patches] [dirs of patches] # @DESCRIPTION: # epatch is designed to greatly simplify the application of patches. It can # process patch files directly, or directories of patches. The patches may be # compressed (bzip/gzip/etc...) or plain text. You generally need not specify # the -p option as epatch will automatically attempt -p0 to -p4 until things # apply successfully. # # If you do not specify any patches/dirs, then epatch will default to the # directory specified by EPATCH_SOURCE. # # Any options specified that start with a dash will be passed down to patch # for this specific invocation. As soon as an arg w/out a dash is found, then # arg processing stops. # # When processing directories, epatch will apply all patches that match: # @CODE # if ${EPATCH_FORCE} != "yes" # ??_${ARCH}_foo.${EPATCH_SUFFIX} # else # *.${EPATCH_SUFFIX} # @CODE # The leading ?? are typically numbers used to force consistent patch ordering. # The arch field is used to apply patches only for the host architecture with # the special value of "all" means apply for everyone. Note that using values # other than "all" is highly discouraged -- you should apply patches all the # time and let architecture details be detected at configure/compile time. # # If EPATCH_SUFFIX is empty, then no period before it is implied when searching # for patches to apply. # # Refer to the other EPATCH_xxx variables for more customization of behavior. epatch() { _epatch_draw_line() { # create a line of same length as input string [[ -z $1 ]] && set "$(printf "%65s" '')" echo "${1//?/=}" } unset P4CONFIG P4PORT P4USER # keep perforce at bay #56402 # First process options. We localize the EPATCH_OPTS setting # from above so that we can pass it on in the loop below with # any additional values the user has specified. local EPATCH_OPTS=( ${EPATCH_OPTS[*]} ) while [[ $# -gt 0 ]] ; do case $1 in -*) EPATCH_OPTS+=( "$1" ) ;; *) break ;; esac shift done # Let the rest of the code process one user arg at a time -- # each arg may expand into multiple patches, and each arg may # need to start off with the default global EPATCH_xxx values if [[ $# -gt 1 ]] ; then local m for m in "$@" ; do epatch "${m}" done return 0 fi local SINGLE_PATCH="no" # no args means process ${EPATCH_SOURCE} [[ $# -eq 0 ]] && set -- "${EPATCH_SOURCE}" if [[ -f $1 ]] ; then SINGLE_PATCH="yes" set -- "$1" # Use the suffix from the single patch (localize it); the code # below will find the suffix for us local EPATCH_SUFFIX=$1 elif [[ -d $1 ]] ; then # We have to force sorting to C so that the wildcard expansion is consistent #471666. evar_push_set LC_COLLATE C # Some people like to make dirs of patches w/out suffixes (vim). set -- "$1"/*${EPATCH_SUFFIX:+."${EPATCH_SUFFIX}"} evar_pop elif [[ -f ${EPATCH_SOURCE}/$1 ]] ; then # Re-use EPATCH_SOURCE as a search dir epatch "${EPATCH_SOURCE}/$1" return $? else # sanity check ... if it isn't a dir or file, wtf man ? [[ $# -ne 0 ]] && EPATCH_SOURCE=$1 echo eerror "Cannot find \$EPATCH_SOURCE! Value for \$EPATCH_SOURCE is:" eerror eerror " ${EPATCH_SOURCE}" eerror " ( ${EPATCH_SOURCE##*/} )" echo die "Cannot find \$EPATCH_SOURCE!" fi # Now that we know we're actually going to apply something, merge # all of the patch options back in to a single variable for below. EPATCH_OPTS="${EPATCH_COMMON_OPTS} ${EPATCH_OPTS[*]}" local PIPE_CMD case ${EPATCH_SUFFIX##*\.} in xz) PIPE_CMD="xz -dc" ;; lzma) PIPE_CMD="lzma -dc" ;; bz2) PIPE_CMD="bzip2 -dc" ;; gz|Z|z) PIPE_CMD="gzip -dc" ;; ZIP|zip) PIPE_CMD="unzip -p" ;; *) ;; esac [[ ${SINGLE_PATCH} == "no" ]] && einfo "${EPATCH_MULTI_MSG}" local x for x in "$@" ; do # If the patch dir given contains subdirs, or our EPATCH_SUFFIX # didn't match anything, ignore continue on [[ ! -f ${x} ]] && continue local patchname=${x##*/} # Apply single patches, or forced sets of patches, or # patches with ARCH dependant names. # ???_arch_foo.patch # Else, skip this input altogether local a=${patchname#*_} # strip the ???_ a=${a%%_*} # strip the _foo.patch if ! [[ ${SINGLE_PATCH} == "yes" || \ ${EPATCH_FORCE} == "yes" || \ ${a} == all || \ ${a} == ${ARCH} ]] then continue fi # Let people filter things dynamically if [[ -n ${EPATCH_EXCLUDE}${EPATCH_USER_EXCLUDE} ]] ; then # let people use globs in the exclude eshopts_push -o noglob local ex for ex in ${EPATCH_EXCLUDE} ; do if [[ ${patchname} == ${ex} ]] ; then einfo " Skipping ${patchname} due to EPATCH_EXCLUDE ..." eshopts_pop continue 2 fi done for ex in ${EPATCH_USER_EXCLUDE} ; do if [[ ${patchname} == ${ex} ]] ; then einfo " Skipping ${patchname} due to EPATCH_USER_EXCLUDE ..." eshopts_pop continue 2 fi done eshopts_pop fi if [[ ${SINGLE_PATCH} == "yes" ]] ; then if [[ -n ${EPATCH_SINGLE_MSG} ]] ; then einfo "${EPATCH_SINGLE_MSG}" else einfo "Applying ${patchname} ..." fi else einfo " ${patchname} ..." fi # Handle aliased patch command #404447 #461568 local patch="patch" eval $(alias patch 2>/dev/null | sed 's:^alias ::') # most of the time, there will only be one run per unique name, # but if there are more, make sure we get unique log filenames local STDERR_TARGET="${T}/${patchname}.out" if [[ -e ${STDERR_TARGET} ]] ; then STDERR_TARGET="${T}/${patchname}-$$.out" fi printf "***** %s *****\nPWD: %s\nPATCH TOOL: %s -> %s\nVERSION INFO:\n%s\n\n" \ "${patchname}" \ "${PWD}" \ "${patch}" \ "$(type -P "${patch}")" \ "$(${patch} --version)" \ > "${STDERR_TARGET}" # Decompress the patch if need be local count=0 local PATCH_TARGET if [[ -n ${PIPE_CMD} ]] ; then PATCH_TARGET="${T}/$$.patch" echo "PIPE_COMMAND: ${PIPE_CMD} ${x} > ${PATCH_TARGET}" >> "${STDERR_TARGET}" if ! (${PIPE_CMD} "${x}" > "${PATCH_TARGET}") >> "${STDERR_TARGET}" 2>&1 ; then echo eerror "Could not extract patch!" #die "Could not extract patch!" count=5 break fi else PATCH_TARGET=${x} fi # Check for absolute paths in patches. If sandbox is disabled, # people could (accidently) patch files in the root filesystem. # Or trigger other unpleasantries #237667. So disallow -p0 on # such patches. local abs_paths=$(egrep -n '^[-+]{3} /' "${PATCH_TARGET}" | awk '$2 != "/dev/null" { print }') if [[ -n ${abs_paths} ]] ; then count=1 printf "NOTE: skipping -p0 due to absolute paths in patch:\n%s\n" "${abs_paths}" >> "${STDERR_TARGET}" fi # Similar reason, but with relative paths. local rel_paths=$(egrep -n '^[-+]{3} [^ ]*[.][.]/' "${PATCH_TARGET}") if [[ -n ${rel_paths} ]] ; then echo eerror "Rejected Patch: ${patchname}!" eerror " ( ${PATCH_TARGET} )" eerror eerror "Your patch uses relative paths '../':" eerror "${rel_paths}" echo die "you need to fix the relative paths in patch" fi # Dynamically detect the correct -p# ... i'm lazy, so shoot me :/ local patch_cmd while [[ ${count} -lt 5 ]] ; do patch_cmd="${patch} -p${count} ${EPATCH_OPTS}" # Generate some useful debug info ... ( _epatch_draw_line "***** ${patchname} *****" echo echo "PATCH COMMAND: ${patch_cmd} --dry-run -f < '${PATCH_TARGET}'" echo _epatch_draw_line "***** ${patchname} *****" ${patch_cmd} --dry-run -f < "${PATCH_TARGET}" 2>&1 ret=$? echo echo "patch program exited with status ${ret}" exit ${ret} ) >> "${STDERR_TARGET}" if [ $? -eq 0 ] ; then ( _epatch_draw_line "***** ${patchname} *****" echo echo "ACTUALLY APPLYING ${patchname} ..." echo "PATCH COMMAND: ${patch_cmd} < '${PATCH_TARGET}'" echo _epatch_draw_line "***** ${patchname} *****" ${patch_cmd} < "${PATCH_TARGET}" 2>&1 ret=$? echo echo "patch program exited with status ${ret}" exit ${ret} ) >> "${STDERR_TARGET}" if [ $? -ne 0 ] ; then echo eerror "A dry-run of patch command succeeded, but actually" eerror "applying the patch failed!" #die "Real world sux compared to the dreamworld!" count=5 fi break fi : $(( count++ )) done (( EPATCH_N_APPLIED_PATCHES++ )) # if we had to decompress the patch, delete the temp one if [[ -n ${PIPE_CMD} ]] ; then rm -f "${PATCH_TARGET}" fi if [[ ${count} -ge 5 ]] ; then echo eerror "Failed patch: ${patchname}!" eerror " ( ${PATCH_TARGET} )" eerror eerror "Include in your bug report the contents of:" eerror eerror " ${STDERR_TARGET}" echo die "Failed patch: ${patchname}!" fi # if everything worked, delete the full debug patch log rm -f "${STDERR_TARGET}" # then log away the exact stuff for people to review later cat <<-EOF >> "${T}/epatch.log" PATCH: ${x} CMD: ${patch_cmd} PWD: ${PWD} EOF eend 0 done [[ ${SINGLE_PATCH} == "no" ]] && einfo "Done with patching" : # everything worked } case ${EAPI:-0} in 0|1|2|3|4|5) # @ECLASS_VARIABLE: EPATCH_USER_SOURCE # @USER_VARIABLE # @DESCRIPTION: # Location for user patches, see the epatch_user function. # Should be set by the user. Don't set this in ebuilds. : ${EPATCH_USER_SOURCE:=${PORTAGE_CONFIGROOT%/}/etc/portage/patches} # @FUNCTION: epatch_user # @USAGE: # @DESCRIPTION: # Applies user-provided patches to the source tree. The patches are # taken from /etc/portage/patches/<CATEGORY>/<P-PR|P|PN>[:SLOT]/, where the first # of these three directories to exist will be the one to use, ignoring # any more general directories which might exist as well. They must end # in ".patch" to be applied. # # User patches are intended for quick testing of patches without ebuild # modifications, as well as for permanent customizations a user might # desire. Obviously, there can be no official support for arbitrarily # patched ebuilds. So whenever a build log in a bug report mentions that # user patches were applied, the user should be asked to reproduce the # problem without these. # # Not all ebuilds do call this function, so placing patches in the # stated directory might or might not work, depending on the package and # the eclasses it inherits and uses. It is safe to call the function # repeatedly, so it is always possible to add a call at the ebuild # level. The first call is the time when the patches will be # applied. # # Ideally, this function should be called after gentoo-specific patches # have been applied, so that their code can be modified as well, but # before calls to e.g. eautoreconf, as the user patches might affect # autotool input files as well. epatch_user() { [[ $# -ne 0 ]] && die "epatch_user takes no options" # Allow multiple calls to this function; ignore all but the first local applied="${T}/epatch_user.log" [[ -e ${applied} ]] && return 2 # don't clobber any EPATCH vars that the parent might want local EPATCH_SOURCE check for check in ${CATEGORY}/{${P}-${PR},${P},${PN}}{,:${SLOT%/*}}; do EPATCH_SOURCE=${EPATCH_USER_SOURCE}/${CTARGET}/${check} [[ -r ${EPATCH_SOURCE} ]] || EPATCH_SOURCE=${EPATCH_USER_SOURCE}/${CHOST}/${check} [[ -r ${EPATCH_SOURCE} ]] || EPATCH_SOURCE=${EPATCH_USER_SOURCE}/${check} if [[ -d ${EPATCH_SOURCE} ]] ; then local old_n_applied_patches=${EPATCH_N_APPLIED_PATCHES:-0} EPATCH_SOURCE=${EPATCH_SOURCE} \ EPATCH_SUFFIX="patch" \ EPATCH_FORCE="yes" \ EPATCH_MULTI_MSG="Applying user patches from ${EPATCH_SOURCE} ..." \ epatch echo "${EPATCH_SOURCE}" > "${applied}" if [[ ${old_n_applied_patches} -lt ${EPATCH_N_APPLIED_PATCHES} ]]; then has epatch_user_death_notice ${EBUILD_DEATH_HOOKS} || \ EBUILD_DEATH_HOOKS+=" epatch_user_death_notice" fi return 0 fi done echo "none" > "${applied}" return 1 } # @FUNCTION: epatch_user_death_notice # @INTERNAL # @DESCRIPTION: # Include an explicit notice in the die message itself that user patches were # applied to this build. epatch_user_death_notice() { ewarn "!!! User patches were applied to this build!" } esac _EPATCH_ECLASS=1 fi #_EPATCH_ECLASS