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381 lines
11 KiB
381 lines
11 KiB
# Copyright 1999-2022 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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# @ECLASS: epatch.eclass
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# @MAINTAINER:
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# base-system@gentoo.org
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# @SUPPORTED_EAPIS: 6
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# @BLURB: easy patch application functions
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# @DEPRECATED: eapply from EAPI 7
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# @DESCRIPTION:
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# An eclass providing epatch and epatch_user functions to easily apply
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# patches to ebuilds. Mostly superseded by eapply* in EAPI 6.
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if [[ -z ${_EPATCH_ECLASS} ]]; then
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case ${EAPI} in
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6) ;;
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*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
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esac
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inherit estack
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# @VARIABLE: EPATCH_SOURCE
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# @DESCRIPTION:
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# Default directory to search for patches.
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EPATCH_SOURCE="${WORKDIR}/patch"
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# @VARIABLE: EPATCH_SUFFIX
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# @DESCRIPTION:
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# Default extension for patches (do not prefix the period yourself).
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EPATCH_SUFFIX="patch.bz2"
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# @VARIABLE: EPATCH_OPTS
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# @DESCRIPTION:
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# Options to pass to patch. Meant for ebuild/package-specific tweaking
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# such as forcing the patch level (-p#) or fuzz (-F#) factor. Note that
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# for single patch tweaking, you can also pass flags directly to epatch.
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EPATCH_OPTS=""
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# @VARIABLE: EPATCH_COMMON_OPTS
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# @DESCRIPTION:
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# Common options to pass to `patch`. You probably should never need to
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# change these. If you do, please discuss it with base-system first to
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# be sure.
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# @CODE
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# -g0 - keep RCS, ClearCase, Perforce and SCCS happy #24571
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# --no-backup-if-mismatch - do not leave .orig files behind
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# -E - automatically remove empty files
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# @CODE
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EPATCH_COMMON_OPTS="-g0 -E --no-backup-if-mismatch"
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# @VARIABLE: EPATCH_EXCLUDE
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# @DESCRIPTION:
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# List of patches not to apply. Note this is only file names,
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# and not the full path. Globs accepted.
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EPATCH_EXCLUDE=""
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# @VARIABLE: EPATCH_MULTI_MSG
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# @DESCRIPTION:
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# Change the printed message for multiple patches.
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EPATCH_MULTI_MSG="Applying various patches (bugfixes/updates) ..."
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# @VARIABLE: EPATCH_FORCE
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# @DESCRIPTION:
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# Only require patches to match EPATCH_SUFFIX rather than the extended
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# arch naming style.
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EPATCH_FORCE="no"
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# @VARIABLE: EPATCH_USER_EXCLUDE
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# @DEFAULT_UNSET
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# @DESCRIPTION:
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# List of patches not to apply. Note this is only file names,
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# and not the full path. Globs accepted.
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# @FUNCTION: epatch
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# @USAGE: [options] [patches] [dirs of patches]
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# @DESCRIPTION:
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# epatch is designed to greatly simplify the application of patches. It can
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# process patch files directly, or directories of patches. The patches may be
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# compressed (bzip/gzip/etc...) or plain text. You generally need not specify
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# the -p option as epatch will automatically attempt -p0 to -p4 until things
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# apply successfully.
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#
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# If you do not specify any patches/dirs, then epatch will default to the
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# directory specified by EPATCH_SOURCE.
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#
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# Any options specified that start with a dash will be passed down to patch
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# for this specific invocation. As soon as an arg w/out a dash is found, then
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# arg processing stops.
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#
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# When processing directories, epatch will apply all patches that match:
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# @CODE
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# if ${EPATCH_FORCE} != "yes"
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# ??_${ARCH}_foo.${EPATCH_SUFFIX}
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# else
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# *.${EPATCH_SUFFIX}
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# @CODE
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# The leading ?? are typically numbers used to force consistent patch ordering.
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# The arch field is used to apply patches only for the host architecture with
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# the special value of "all" means apply for everyone. Note that using values
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# other than "all" is highly discouraged -- you should apply patches all the
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# time and let architecture details be detected at configure/compile time.
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#
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# If EPATCH_SUFFIX is empty, then no period before it is implied when searching
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# for patches to apply.
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#
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# Refer to the other EPATCH_xxx variables for more customization of behavior.
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epatch() {
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_epatch_draw_line() {
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# create a line of same length as input string
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[[ -z $1 ]] && set "$(printf "%65s" '')"
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echo "${1//?/=}"
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}
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unset P4CONFIG P4PORT P4USER # keep perforce at bay #56402
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# First process options. We localize the EPATCH_OPTS setting
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# from above so that we can pass it on in the loop below with
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# any additional values the user has specified.
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local EPATCH_OPTS=( ${EPATCH_OPTS[*]} )
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while [[ $# -gt 0 ]] ; do
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case $1 in
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-*) EPATCH_OPTS+=( "$1" ) ;;
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*) break ;;
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esac
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shift
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done
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# Let the rest of the code process one user arg at a time --
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# each arg may expand into multiple patches, and each arg may
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# need to start off with the default global EPATCH_xxx values
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if [[ $# -gt 1 ]] ; then
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local m
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for m in "$@" ; do
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epatch "${m}"
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done
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return 0
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fi
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local SINGLE_PATCH="no"
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# no args means process ${EPATCH_SOURCE}
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[[ $# -eq 0 ]] && set -- "${EPATCH_SOURCE}"
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if [[ -f $1 ]] ; then
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SINGLE_PATCH="yes"
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set -- "$1"
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# Use the suffix from the single patch (localize it); the code
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# below will find the suffix for us
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local EPATCH_SUFFIX=$1
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elif [[ -d $1 ]] ; then
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# We have to force sorting to C so that the wildcard expansion is consistent #471666.
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evar_push_set LC_COLLATE C
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# Some people like to make dirs of patches w/out suffixes (vim).
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set -- "$1"/*${EPATCH_SUFFIX:+."${EPATCH_SUFFIX}"}
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evar_pop
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elif [[ -f ${EPATCH_SOURCE}/$1 ]] ; then
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# Re-use EPATCH_SOURCE as a search dir
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epatch "${EPATCH_SOURCE}/$1"
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return $?
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else
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# sanity check ... if it isn't a dir or file, wtf man ?
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[[ $# -ne 0 ]] && EPATCH_SOURCE=$1
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echo
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eerror "Cannot find \$EPATCH_SOURCE! Value for \$EPATCH_SOURCE is:"
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eerror
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eerror " ${EPATCH_SOURCE}"
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eerror " ( ${EPATCH_SOURCE##*/} )"
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echo
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die "Cannot find \$EPATCH_SOURCE!"
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fi
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# Now that we know we're actually going to apply something, merge
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# all of the patch options back in to a single variable for below.
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EPATCH_OPTS="${EPATCH_COMMON_OPTS} ${EPATCH_OPTS[*]}"
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local PIPE_CMD
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case ${EPATCH_SUFFIX##*\.} in
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xz) PIPE_CMD="xz -dc" ;;
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lzma) PIPE_CMD="lzma -dc" ;;
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bz2) PIPE_CMD="bzip2 -dc" ;;
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gz|Z|z) PIPE_CMD="gzip -dc" ;;
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ZIP|zip) PIPE_CMD="unzip -p" ;;
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*) ;;
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esac
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[[ ${SINGLE_PATCH} == "no" ]] && einfo "${EPATCH_MULTI_MSG}"
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local x
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for x in "$@" ; do
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# If the patch dir given contains subdirs, or our EPATCH_SUFFIX
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# didn't match anything, ignore continue on
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[[ ! -f ${x} ]] && continue
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local patchname=${x##*/}
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# Apply single patches, or forced sets of patches, or
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# patches with ARCH dependant names.
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# ???_arch_foo.patch
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# Else, skip this input altogether
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local a=${patchname#*_} # strip the ???_
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a=${a%%_*} # strip the _foo.patch
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if ! [[ ${SINGLE_PATCH} == "yes" || \
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${EPATCH_FORCE} == "yes" || \
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${a} == all || \
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${a} == ${ARCH} ]]
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then
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continue
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fi
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# Let people filter things dynamically
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if [[ -n ${EPATCH_EXCLUDE}${EPATCH_USER_EXCLUDE} ]] ; then
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# let people use globs in the exclude
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eshopts_push -o noglob
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local ex
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for ex in ${EPATCH_EXCLUDE} ; do
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if [[ ${patchname} == ${ex} ]] ; then
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einfo " Skipping ${patchname} due to EPATCH_EXCLUDE ..."
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eshopts_pop
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continue 2
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fi
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done
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for ex in ${EPATCH_USER_EXCLUDE} ; do
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if [[ ${patchname} == ${ex} ]] ; then
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einfo " Skipping ${patchname} due to EPATCH_USER_EXCLUDE ..."
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eshopts_pop
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continue 2
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fi
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done
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eshopts_pop
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fi
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if [[ ${SINGLE_PATCH} == "yes" ]] ; then
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ebegin "Applying ${patchname}"
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else
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ebegin " ${patchname}"
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fi
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# Handle aliased patch command #404447 #461568
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local patch="patch"
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eval $(alias patch 2>/dev/null | sed 's:^alias ::')
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# most of the time, there will only be one run per unique name,
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# but if there are more, make sure we get unique log filenames
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local STDERR_TARGET="${T}/${patchname}.out"
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if [[ -e ${STDERR_TARGET} ]] ; then
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STDERR_TARGET="${T}/${patchname}-$$.out"
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fi
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printf "***** %s *****\nPWD: %s\nPATCH TOOL: %s -> %s\nVERSION INFO:\n%s\n\n" \
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"${patchname}" \
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"${PWD}" \
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"${patch}" \
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"$(type -P "${patch}")" \
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"$(${patch} --version)" \
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> "${STDERR_TARGET}"
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# Decompress the patch if need be
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local count=0
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local PATCH_TARGET
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if [[ -n ${PIPE_CMD} ]] ; then
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PATCH_TARGET="${T}/$$.patch"
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echo "PIPE_COMMAND: ${PIPE_CMD} ${x} > ${PATCH_TARGET}" >> "${STDERR_TARGET}"
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if ! (${PIPE_CMD} "${x}" > "${PATCH_TARGET}") >> "${STDERR_TARGET}" 2>&1 ; then
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echo
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eerror "Could not extract patch!"
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#die "Could not extract patch!"
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count=5
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break
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fi
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else
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PATCH_TARGET=${x}
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fi
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# Check for absolute paths in patches. If sandbox is disabled,
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# people could (accidently) patch files in the root filesystem.
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# Or trigger other unpleasantries #237667. So disallow -p0 on
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# such patches.
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local abs_paths=$(grep -E -n '^[-+]{3} /' "${PATCH_TARGET}" | awk '$2 != "/dev/null" { print }')
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if [[ -n ${abs_paths} ]] ; then
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count=1
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printf "NOTE: skipping -p0 due to absolute paths in patch:\n%s\n" "${abs_paths}" >> "${STDERR_TARGET}"
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fi
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# Similar reason, but with relative paths.
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local rel_paths=$(grep -E -n '^[-+]{3} [^ ]*[.][.]/' "${PATCH_TARGET}")
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if [[ -n ${rel_paths} ]] ; then
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echo
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eerror "Rejected Patch: ${patchname}!"
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eerror " ( ${PATCH_TARGET} )"
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eerror
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eerror "Your patch uses relative paths '../':"
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eerror "${rel_paths}"
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echo
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die "you need to fix the relative paths in patch"
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fi
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# Dynamically detect the correct -p# ... i'm lazy, so shoot me :/
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local patch_cmd
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while [[ ${count} -lt 5 ]] ; do
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patch_cmd="${patch} -p${count} ${EPATCH_OPTS}"
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# Generate some useful debug info ...
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(
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_epatch_draw_line "***** ${patchname} *****"
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echo
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echo "PATCH COMMAND: ${patch_cmd} --dry-run -f < '${PATCH_TARGET}'"
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echo
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_epatch_draw_line "***** ${patchname} *****"
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${patch_cmd} --dry-run -f < "${PATCH_TARGET}" 2>&1
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ret=$?
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echo
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echo "patch program exited with status ${ret}"
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exit ${ret}
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) >> "${STDERR_TARGET}"
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if [ $? -eq 0 ] ; then
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(
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_epatch_draw_line "***** ${patchname} *****"
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echo
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echo "ACTUALLY APPLYING ${patchname} ..."
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echo "PATCH COMMAND: ${patch_cmd} < '${PATCH_TARGET}'"
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echo
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_epatch_draw_line "***** ${patchname} *****"
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${patch_cmd} < "${PATCH_TARGET}" 2>&1
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ret=$?
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echo
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echo "patch program exited with status ${ret}"
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exit ${ret}
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) >> "${STDERR_TARGET}"
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if [ $? -ne 0 ] ; then
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echo
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eerror "A dry-run of patch command succeeded, but actually"
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eerror "applying the patch failed!"
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#die "Real world sux compared to the dreamworld!"
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count=5
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fi
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break
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fi
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: $(( count++ ))
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done
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(( EPATCH_N_APPLIED_PATCHES++ ))
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# if we had to decompress the patch, delete the temp one
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if [[ -n ${PIPE_CMD} ]] ; then
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rm -f "${PATCH_TARGET}"
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fi
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if [[ ${count} -ge 5 ]] ; then
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echo
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eerror "Failed patch: ${patchname}!"
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eerror " ( ${PATCH_TARGET} )"
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eerror
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eerror "Include in your bug report the contents of:"
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eerror
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eerror " ${STDERR_TARGET}"
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echo
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die "Failed patch: ${patchname}!"
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fi
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# if everything worked, delete the full debug patch log
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rm -f "${STDERR_TARGET}"
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# then log away the exact stuff for people to review later
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cat <<-EOF >> "${T}/epatch.log"
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PATCH: ${x}
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CMD: ${patch_cmd}
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PWD: ${PWD}
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EOF
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eend 0
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done
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[[ ${SINGLE_PATCH} == "no" ]] && einfo "Done with patching"
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: # everything worked
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}
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_EPATCH_ECLASS=1
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fi #_EPATCH_ECLASS
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