prefix.eclass: introduce hprefixify and prefixify_ro

Bug: 583740

1 files changed, 78 insertions, 0 deletions

diff --git a/eclass/prefix.eclass b/eclass/prefix.eclass
index 1f3c4b0c4a5b..c0675cd37032 100644
--- a/eclass/prefix.eclass
+++ b/eclass/prefix.eclass
@@ -48,5 +48,83 @@ eprefixify() {
 	return 0
 }
 
+# @FUNCTION: hprefixify
+# @USAGE: [ -w <line match> ] [-e <extended regex> ] <list of files>
+# @DESCRIPTION:
+# Tries a set of heuristics to prefixify the given files. Dies if no
+# arguments are given, a file does not exist, or changing a file failed.
+#
+# Additional extended regular expression can be passed by -e or
+# environment variable PREFIX_EXTRA_REGEX.  The default heuristics can
+# be constrained to lines that match a sed expression passed by -w or
+# environment variable PREFIX_LINE_MATCH.
+# @EXAMPLE:
+# Only prefixify the 30th line,
+#   hprefixify -w 30 configure
+# Only prefixify lines that contain "PATH",
+#   hprefixify -w "/PATH/" configure
+# Also delete all the /opt/gnu search paths,
+#   hprefixify -e "/\/opt\/gnu/d" configure
+hprefixify() {
+	use prefix || return 0
+
+	local PREFIX_EXTRA_REGEX PREFIX_LINE_MATCH xl=() x
+	while [[ $# -gt 0 ]]; do
+		case $1 in
+			-e)
+				PREFIX_EXTRA_REGEX="$2"
+				shift
+				;;
+			-w)
+				PREFIX_LINE_MATCH="$2"
+				shift
+				;;
+			*)
+				xl+=( "$1" )
+				;;
+		esac
+		shift
+	done
+
+	[[ ${#xl[@]} -lt 1 ]] && die "at least one file operand is required"
+	einfo "Adjusting to prefix ${EPREFIX:-/}"
+	for x in "${xl[@]}" ; do
+		if [[ -e ${x} ]] ; then
+			ebegin "  ${x##*/}"
+			sed -r \
+				-e "${PREFIX_LINE_MATCH}s,([^[:alnum:]}\)\.])/(usr|lib(|[onx]?32|n?64)|etc|bin|sbin|var|opt),\1${EPREFIX}/\2,g" \
+				-e "${PREFIX_EXTRA_REGEX}" \
+				-i "${x}"
+			eend $? || die "failed to prefixify ${x}"
+		else
+			die "${x} does not exist"
+		fi
+	done
+}
 
+# @FUNCTION: prefixify_ro
+# @USAGE: prefixify_ro <file>.
+# @DESCRIPTION:
+# prefixify a read-only file.
+# copies the files to ${T}, prefixies it, echos the new file.
+# @EXAMPLE:
+# doexe "$(prefixify_ro "${FILESDIR}"/fix_libtool_files.sh)"
+# epatch "$(prefixify_ro "${FILESDIR}"/${PN}-4.0.2-path.patch)"
+prefixify_ro() {
+	if [[ -e $1 ]] ; then
+		local f=${1##*/}
+		cp "$1" "${T}" || die "failed to copy file"
+		local x="${T}"/${f}
+		# redirect to stderr because stdout is used to
+		# return the prefixified file.
+		if grep -qs @GENTOO_PORTAGE_EPREFIX@ "${x}" ; then
+			eprefixify "${T}"/${f} 1>&2
+		else
+			hprefixify "${T}"/${f} 1>&2
+		fi
+		echo "${x}"
+	else
+		die "$1 does not exist"
+	fi
+}
 # vim: tw=72: