[gentoo-dev] versionator.eclass: convert to eshopts_{push,pop}

[Mike Frysinger]

now that eutils.eclass contains a common version of safely handling shopts
settings, we can drop the local versionator.eclass code that was handling this
and convert it to eutils.  seems to work for me, but i rarely use this eclass.
-mike

--- versionator.eclass	18 Jul 2010 21:24:33 -0000	1.16
+++ versionator.eclass	18 Jul 2010 21:29:21 -0000
@@ -25,27 +25,7 @@
 #     version_is_at_least             want      have
 #  which may be buggy, so use with caution.
 
-# Quick function to toggle the shopts required for some functions on and off
-# Used because we can't set extglob in global scope anymore (QA Violation)
-__versionator_shopt_toggle() {
-	VERSIONATOR_RECURSION=${VERSIONATOR_RECURSION:-0}
-	case "$1" in
-		"on")
-			if [[ $VERSIONATOR_RECURSION -lt 1 ]] ;  then
-				VERSIONATOR_OLD_EXTGLOB=$(shopt -p extglob)
-				shopt -s extglob
-			fi
-			VERSIONATOR_RECURSION=$(( $VERSIONATOR_RECURSION + 1 ))
-			;;
-		"off")
-			VERSIONATOR_RECURSION=$(( $VERSIONATOR_RECURSION - 1 ))
-			if [[ $VERSIONATOR_RECURSION -lt 1 ]] ; then
-				eval $VERSIONATOR_OLD_EXTGLOB
-			fi
-			;;
-	esac
-	return 0
-}
+inherit eutils
 
 # @FUNCTION: get_all_version_components
 # @USAGE: [version]
@@ -58,7 +38,7 @@ __versionator_shopt_toggle() {
 #     20040905    ->  20040905
 #     3.0c-r1     ->  3 . 0 c - r1
 get_all_version_components() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local ver_str=${1:-${PV}} result result_idx=0
 	result=( )
 
@@ -66,7 +46,7 @@ get_all_version_components() {
 	# times.
 	if [[ "${VERSIONATOR_CACHE_VER_STR}" == "${ver_str}" ]] ; then
 		echo ${VERSIONATOR_CACHE_RESULT}
-		__versionator_shopt_toggle off
+		eshopts_pop
 		return
 	fi
 	export VERSIONATOR_CACHE_VER_STR="${ver_str}"
@@ -106,7 +86,7 @@ get_all_version_components() {
 
 	export VERSIONATOR_CACHE_RESULT="${result[@]}"
 	echo ${result[@]}
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: get_version_components
@@ -120,11 +100,11 @@ get_all_version_components() {
 #     20040905    ->  20040905
 #     3.0c-r1     ->  3 0 c r1
 get_version_components() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local c="$(get_all_version_components "${1:-${PV}}")"
 	c=( ${c[@]//[-._]/ } )
 	echo ${c[@]}
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: get_major_version
@@ -137,11 +117,11 @@ get_version_components() {
 #     20040905    ->  20040905
 #     3.0c-r1     ->  3
 get_major_version() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local c
 	c=( $(get_all_version_components "${1:-${PV}}" ) )
 	echo ${c[0]}
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: get_version_component_range
@@ -153,7 +133,7 @@ get_major_version() {
 #    1-2    1.2.3       -> 1.2
 #    2-     1.2.3       -> 2.3
 get_version_component_range() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local c v="${2:-${PV}}" range="${1}" range_start range_end i=-1 j=0
 	c=( $(get_all_version_components ${v} ) )
 	range_start="${range%-*}" ; range_start="${range_start:-1}"
@@ -161,17 +141,17 @@ get_version_component_range() {
 
 	while (( j < ${range_start} )) ; do
 		i=$(($i + 1))
-		[[ $i -gt ${#c[@]} ]] && __versionator_shopt_toggle off && return
+		[[ $i -gt ${#c[@]} ]] && eshopts_pop && return
 		[[ -n "${c[${i}]//[-._]}" ]] && j=$(($j + 1))
 	done
 
 	while (( j <= ${range_end} )) ; do
 		echo -n ${c[$i]}
-		[[ $i -gt ${#c[@]} ]] && __versionator_shopt_toggle off && return
+		[[ $i -gt ${#c[@]} ]] && eshopts_pop && return
 		[[ -n "${c[${i}]//[-._]}" ]] && j=$(($j + 1))
 		i=$(($i + 1))
 	done
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: get_after_major_version
@@ -185,9 +165,9 @@ get_version_component_range() {
 #     20040905    ->  (empty string)
 #     3.0c-r1     ->  0c-r1
 get_after_major_version() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	echo $(get_version_component_range 2- "${1:-${PV}}" )
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: replace_version_separator
@@ -201,7 +181,7 @@ get_after_major_version() {
 # Rather than being a number, $1 can be a separator character such as '-', '.'
 # or '_'. In this case, the first separator of this kind is selected.
 replace_version_separator() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local w i c found=0 v="${3:-${PV}}"
 	w=${1:-1}
 	c=( $(get_all_version_components ${v} ) )
@@ -226,7 +206,7 @@ replace_version_separator() {
 	fi
 	c=${c[@]}
 	echo ${c// }
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: replace_all_version_separators
@@ -235,12 +215,12 @@ replace_version_separator() {
 # Replace all version separators in $2 (defaults to $PV) with $1.
 #     '_' 1b.2.3        -> 1b_2_3
 replace_all_version_separators() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local c
 	c=( $(get_all_version_components "${2:-${PV}}" ) )
 	c="${c[@]//[-._]/$1}"
 	echo ${c// }
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: delete_version_separator
@@ -254,9 +234,9 @@ replace_all_version_separators() {
 # Rather than being a number, $1 can be a separator character such as '-', '.'
 # or '_'. In this case, the first separator of this kind is deleted.
 delete_version_separator() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	replace_version_separator "${1}" "" "${2}"
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: delete_all_version_separators
@@ -265,9 +245,9 @@ delete_version_separator() {
 # Delete all version separators in $1 (defaults to $PV).
 #     1b.2.3        -> 1b23
 delete_all_version_separators() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	replace_all_version_separators "" "${1}"
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: get_version_component_count
@@ -277,11 +257,11 @@ delete_all_version_separators() {
 #     1.0.1       ->  3
 #     3.0c-r1     ->  4
 get_version_component_count() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local a
 	a=( $(get_version_components "${1:-${PV}}" ) )
 	echo ${#a[@]}
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: get_last_version_component_index
@@ -292,9 +272,9 @@ get_version_component_count() {
 #     1.0.1       ->  3
 #     3.0c-r1     ->  4
 get_last_version_component_index() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	echo $(( $(get_version_component_count "${1:-${PV}}" ) - 1 ))
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: version_is_at_least
@@ -304,25 +284,25 @@ get_last_version_component_index() {
 # only. May not be reliable, be sure to do very careful testing before actually
 # using this.
 version_is_at_least() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local want_s="$1" have_s="${2:-${PVR}}" r
 	version_compare "${want_s}" "${have_s}"
 	r=$?
 	case $r in
 		1|2)
-			__versionator_shopt_toggle off
+			eshopts_pop
 			return 0
 			;;
 		3)
-			__versionator_shopt_toggle off
+			eshopts_pop
 			return 1
 			;;
 		*)
-			__versionator_shopt_toggle off
+			eshopts_pop
 			die "versionator compare bug [atleast, ${want_s}, ${have_s}, ${r}]"
 			;;
 	esac
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: version_compare
@@ -333,7 +313,7 @@ version_is_at_least() {
 # return 3. You probably want version_is_at_least rather than this function.
 # May not be very reliable. Test carefully before using this.
 version_compare() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local ver_a=${1} ver_b=${2} parts_a parts_b cur_idx_a=0 cur_idx_b=0
 	parts_a=( $(get_all_version_components "${ver_a}" ) )
 	parts_b=( $(get_all_version_components "${ver_b}" ) )
@@ -379,8 +359,8 @@ version_compare() {
 		[[ -z ${cur_tok_b} ]] && cur_tok_b=0
 
 		# compare
-		[[ ${cur_tok_a} -lt ${cur_tok_b} ]] && __versionator_shopt_toggle off && return 1
-		[[ ${cur_tok_a} -gt ${cur_tok_b} ]] && __versionator_shopt_toggle off && return 3
+		[[ ${cur_tok_a} -lt ${cur_tok_b} ]] && eshopts_pop && return 1
+		[[ ${cur_tok_a} -gt ${cur_tok_b} ]] && eshopts_pop && return 3
 	done
 
 	### number parts equal. compare letter parts.
@@ -401,8 +381,8 @@ version_compare() {
 	fi
 
 	# compare
-	[[ ${letter_a} < ${letter_b} ]] && __versionator_shopt_toggle off && return 1
-	[[ ${letter_a} > ${letter_b} ]] && __versionator_shopt_toggle off && return 3
+	[[ ${letter_a} < ${letter_b} ]] && eshopts_pop && return 1
+	[[ ${letter_a} > ${letter_b} ]] && eshopts_pop && return 3
 
 	### letter parts equal. compare suffixes in order.
 	local suffix rule part r_lt r_gt
@@ -427,19 +407,19 @@ version_compare() {
 
 		[[ -z ${suffix_a} ]] && [[ -z ${suffix_b} ]] && continue
 
-		[[ -z ${suffix_a} ]] && __versionator_shopt_toggle off && return ${r_gt}
-		[[ -z ${suffix_b} ]] && __versionator_shopt_toggle off && return ${r_lt}
+		[[ -z ${suffix_a} ]] && eshopts_pop && return ${r_gt}
+		[[ -z ${suffix_b} ]] && eshopts_pop && return ${r_lt}
 
 		# avoid octal problems
 		suffix_a=${suffix_a##+(0)} ; suffix_a=${suffix_a:-0}
 		suffix_b=${suffix_b##+(0)} ; suffix_b=${suffix_b:-0}
 
-		[[ ${suffix_a} -lt ${suffix_b} ]] && __versionator_shopt_toggle off && return 1
-		[[ ${suffix_a} -gt ${suffix_b} ]] && __versionator_shopt_toggle off && return 3
+		[[ ${suffix_a} -lt ${suffix_b} ]] && eshopts_pop && return 1
+		[[ ${suffix_a} -gt ${suffix_b} ]] && eshopts_pop && return 3
 	done
 
 	### no differences.
-	__versionator_shopt_toggle off
+	eshopts_pop
 	return 2
 }
 
@@ -450,7 +430,7 @@ version_compare() {
 # algorithm for simplicity, so don't call it with more than a few dozen items.
 # Uses version_compare, so be careful.
 version_sort() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local items= left=0
 	items=( $@ )
 	while [[ ${left} -lt ${#items[@]} ]] ; do
@@ -467,7 +447,7 @@ version_sort() {
 		left=$(( ${left} + 1 ))
 	done
 	echo ${items[@]}
-	__versionator_shopt_toggle off
+	eshopts_pop
 }
 
 # @FUNCTION: version_format_string
@@ -489,7 +469,7 @@ version_format_string() {
 }
 
 __versionator__test_version_compare() {
-	__versionator_shopt_toggle on
+	eshopts_push -s extglob
 	local lt=1 eq=2 gt=3 p q
 
 	__versionator__test_version_compare_t() {
@@ -593,5 +573,5 @@ __versionator__test_version_compare() {
 		__versionator__test_version_compare_t "7.2${p}3" $gt "7.2${p}2"
 		__versionator__test_version_compare_t "7.2${p}2" $lt "7.2${p}3"
 	done
-	__versionator_shopt_toggle off
+	eshopts_pop
 }