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@ -1,208 +0,0 @@ |
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#!/bin/sh |
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|
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throw() { |
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echo "$*" >&2 |
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exit 1 |
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} |
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|
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BRIEF=0 |
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LEAFONLY=0 |
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PRUNE=0 |
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NO_HEAD=0 |
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NORMALIZE_SOLIDUS=0 |
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|
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usage() { |
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echo |
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echo "Usage: JSON.sh [-b] [-l] [-p] [-s] [-h]" |
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echo |
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echo "-p - Prune empty. Exclude fields with empty values." |
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echo "-l - Leaf only. Only show leaf nodes, which stops data duplication." |
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echo "-b - Brief. Combines 'Leaf only' and 'Prune empty' options." |
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echo "-n - No-head. Do not show nodes that have no path (lines that start with [])." |
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echo "-s - Remove escaping of the solidus symbol (straight slash)." |
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echo "-h - This help text." |
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echo |
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} |
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|
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parse_options() { |
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set -- "$@" |
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local ARGN=$# |
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while [ "$ARGN" -ne 0 ] |
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do |
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case $1 in |
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-h) usage |
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exit 0 |
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;; |
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-b) BRIEF=1 |
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LEAFONLY=1 |
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PRUNE=1 |
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;; |
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-l) LEAFONLY=1 |
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;; |
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-p) PRUNE=1 |
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;; |
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-n) NO_HEAD=1 |
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;; |
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-s) NORMALIZE_SOLIDUS=1 |
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;; |
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?*) echo "ERROR: Unknown option." |
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usage |
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exit 0 |
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;; |
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esac |
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shift 1 |
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ARGN=$((ARGN-1)) |
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done |
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} |
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|
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awk_egrep () { |
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local pattern_string=$1 |
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|
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gawk '{ |
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while ($0) { |
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start=match($0, pattern); |
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token=substr($0, start, RLENGTH); |
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print token; |
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$0=substr($0, start+RLENGTH); |
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} |
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}' pattern="$pattern_string" |
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} |
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|
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tokenize () { |
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local GREP |
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local ESCAPE |
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local CHAR |
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|
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if echo "test string" | egrep -ao --color=never "test" >/dev/null 2>&1 |
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then |
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GREP='egrep -ao --color=never' |
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else |
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GREP='egrep -ao' |
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fi |
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|
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if echo "test string" | egrep -o "test" >/dev/null 2>&1 |
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then |
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ESCAPE='(\\[^u[:cntrl:]]|\\u[0-9a-fA-F]{4})' |
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CHAR='[^[:cntrl:]"\\]' |
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else |
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GREP=awk_egrep |
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ESCAPE='(\\\\[^u[:cntrl:]]|\\u[0-9a-fA-F]{4})' |
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CHAR='[^[:cntrl:]"\\\\]' |
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fi |
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|
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local STRING="\"$CHAR*($ESCAPE$CHAR*)*\"" |
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local NUMBER='-?(0|[1-9][0-9]*)([.][0-9]*)?([eE][+-]?[0-9]*)?' |
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local KEYWORD='null|false|true' |
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local SPACE='[[:space:]]+' |
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|
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# Force zsh to expand $A into multiple words |
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local is_wordsplit_disabled=$(unsetopt 2>/dev/null | grep -c '^shwordsplit$') |
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if [ $is_wordsplit_disabled != 0 ]; then setopt shwordsplit; fi |
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$GREP "$STRING|$NUMBER|$KEYWORD|$SPACE|." | egrep -v "^$SPACE$" |
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if [ $is_wordsplit_disabled != 0 ]; then unsetopt shwordsplit; fi |
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} |
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|
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parse_array () { |
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local index=0 |
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local ary='' |
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read -r token |
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case "$token" in |
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']') ;; |
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*) |
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while : |
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do |
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parse_value "$1" "$index" |
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index=$((index+1)) |
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ary="$ary""$value" |
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read -r token |
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case "$token" in |
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']') break ;; |
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',') ary="$ary," ;; |
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*) throw "EXPECTED , or ] GOT ${token:-EOF}" ;; |
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esac |
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read -r token |
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done |
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;; |
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esac |
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[ "$BRIEF" -eq 0 ] && value=$(printf '[%s]' "$ary") || value= |
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: |
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} |
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|
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parse_object () { |
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local key |
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local obj='' |
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read -r token |
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case "$token" in |
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'}') ;; |
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*) |
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while : |
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do |
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case "$token" in |
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'"'*'"') key=$token ;; |
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*) throw "EXPECTED string GOT ${token:-EOF}" ;; |
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esac |
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read -r token |
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case "$token" in |
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':') ;; |
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*) throw "EXPECTED : GOT ${token:-EOF}" ;; |
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esac |
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read -r token |
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parse_value "$1" "$key" |
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obj="$obj$key:$value" |
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read -r token |
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case "$token" in |
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'}') break ;; |
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',') obj="$obj," ;; |
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*) throw "EXPECTED , or } GOT ${token:-EOF}" ;; |
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esac |
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read -r token |
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done |
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;; |
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esac |
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[ "$BRIEF" -eq 0 ] && value=$(printf '{%s}' "$obj") || value= |
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: |
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} |
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|
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parse_value () { |
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local jpath="${1:+$1,}$2" isleaf=0 isempty=0 print=0 |
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case "$token" in |
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'{') parse_object "$jpath" ;; |
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'[') parse_array "$jpath" ;; |
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# At this point, the only valid single-character tokens are digits. |
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''|[!0-9]) throw "EXPECTED value GOT ${token:-EOF}" ;; |
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*) value=$token |
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# if asked, replace solidus ("\/") in json strings with normalized value: "/" |
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[ "$NORMALIZE_SOLIDUS" -eq 1 ] && value=$(echo "$value" | sed 's#\\/#/#g') |
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isleaf=1 |
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[ "$value" = '""' ] && isempty=1 |
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;; |
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esac |
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[ "$value" = '' ] && return |
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[ "$NO_HEAD" -eq 1 ] && [ -z "$jpath" ] && return |
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|
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[ "$LEAFONLY" -eq 0 ] && [ "$PRUNE" -eq 0 ] && print=1 |
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[ "$LEAFONLY" -eq 1 ] && [ "$isleaf" -eq 1 ] && [ $PRUNE -eq 0 ] && print=1 |
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[ "$LEAFONLY" -eq 0 ] && [ "$PRUNE" -eq 1 ] && [ "$isempty" -eq 0 ] && print=1 |
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[ "$LEAFONLY" -eq 1 ] && [ "$isleaf" -eq 1 ] && \ |
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[ $PRUNE -eq 1 ] && [ $isempty -eq 0 ] && print=1 |
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[ "$print" -eq 1 ] && printf "[%s]\t%s\n" "$jpath" "$value" |
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: |
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} |
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|
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parse () { |
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read -r token |
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parse_value |
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read -r token |
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case "$token" in |
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'') ;; |
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*) throw "EXPECTED EOF GOT $token" ;; |
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esac |
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} |
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|
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if ([ "$0" = "$BASH_SOURCE" ] || ! [ -n "$BASH_SOURCE" ]); |
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then |
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parse_options "$@" |
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tokenize | parse |
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fi |
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|
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# vi: expandtab sw=2 ts=2 |
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