问用于diff操作的回波重定向字符串

EN

compRes=`diff -W999 --side-by-side <(echo ${res1}) <(echo ${res2})`

command substitution: line 435: syntax error near unexpected token `('
command substitution: line 435: `diff -W999 --side-by-side <(echo ${res1}) <(echo ${res2})'

compRes=`diff  -W999 --side-by-side <(echo "$res1") <(echo "$res2")`

command substitution: line 435: syntax error near unexpected token `('
command substitution: line 435: `diff  -W999 --side-by-side <(echo "$res1") <(echo "$res2")'

File: test.sh

    file1="Simple.csv"
    file2="SimpleWithAddedLine.csv"

    res1=$(cut -d, -f1-2 $file1)
    res2=$(cut -d, -f1-2 $file2)
    compRes=`diff -W999 --side-by-side <(echo "$res1") <(echo "$res2") | sed '/^[^\t]*\t\s*|\t\(.*\)/{s//\1 CMPUPDATED/;b};/^\([^\t]*\)\t*\s*<$/{s//\1 CMPDELETED/;b};/^.*>\t\(.*\)/{s//\1 CMPNEW/;b};d'`
    added=$(echo "$compRes" | grep "CMPNEW" | wc -l)
    deleted=$(echo "$compRes" | grep "CMPDELETED" | wc -l)
    updated=$(echo "$compRes" | grep "CMPUPDATED" | wc -l)
    let "ttlUpdates = $added + $deleted + $updated"
    echo -e "\nAdded: $added - Deleted: $deleted - Updated: $updated"
    echo -e "Total Changes: $ttlUpdates (Maximum allowed: $maxAllowed)\n"

File: callscript.sh

#!/bin/bash

CORE_SCRIPT_FILE="test.sh"
sh ${CORE_SCRIPT_FILE} | tee "logfile.log"

[batch]$ ./test.sh

Added: 4 - Deleted: 1 - Updated: 1
Total Changes: 6 (Maximum allowed: )

[batch]$ ./callscript.sh
/abc/test.sh: command substitution: line 6: syntax error near unexpected token `('
/abc/test.sh: command substitution: line 6: `diff -W999 --side-by-side <(echo "$res1") <(echo "$res2") | sed '/^[^\t]*\t\s*|\t\(.*\)/{s//\1 CMPUPDATED/;b};/^\([^\t]*\)\t*\s*<$/{s//\1 CMPDELETED/;b};/^.*>\t\(.*\)/{s//\1 CMPNEW/;b};d''