Shell Programming and Scripting

<type source="/home/USER/Desktop" Dest="/home/USER/DIR1/Desktop" URL="ssh/path"/>
<type source="/home/USER/OP1" URL="internet/external/path"/>
<type source="/home/USER/Exe" Dest="/home/USER/DIR1/Exe" URL="intranet/path/add"/>

<path source="/home/USER/Desktop" value="/home/USER/XYZ/Desktop">
    <key value="customer/priority"/>
    <scm tool="toolname/revision"/>
.... some line here
  </path>

<path source="/home/USER/OP1" value="/home/USER/XYZ/ABC/OP1">
    <key value="customer/priority2"/>
    <scm tool="toolname/revision"/>
.... few more lines
  </path>

<path source="/home/USER/Exe" value="/home/USER/XYZ/ABC/Exe">
    <key value="customer/priority4"/>
    <scm tool="toolname/revision"/>
.... few more lines
  </path>

awk -F\" '/^<type/ {print $2}' file1 > a.xml
while read line
do
OUTPUT=`awk -F\" -v b="$line" '$0 ~ b {getline; print $2}' file2`
awk -F\" -v proj="$line" -v repl=ref/img/"$OUTPUT" '$0 ~ proj { $6=repl;print $0}' OFS=\" file1
done < a.xml > OUTPUT

<type source="/home/USER/Desktop" Dest="/home/USER/DIR1/Desktop" URL="ref/img/customer/priority"/>
<type source="/home/USER/OP1" URL="ref/img/customer/priority2"/>
<type source="/home/USER/Exe" Dest="/home/USER/DIR1/Exe" URL="ref/img/customer/priority4"/>

# awk 'NR==FNR{if($0~/key value/){split($0,a,"=");sub("^\"","",a[2]);s[x++]=a[2]}}NR!=FNR{xx="\"ref/img/";{sub("URL=.*","URL="xx s[i++],$0);print}
}' file2 file1
<type source="/home/USER/Desktop" Dest="/home/USER/DIR1/Desktop" URL="ref/img/customer/priority"/>
<type source="/home/USER/OP1" URL="ref/img/customer/priority2"/>
<type source="/home/USER/Exe" Dest="/home/USER/DIR1/Exe" URL="ref/img/customer/priority4"/>

 s[x++]=a[2]}}NR!=FNR{xx="\"ref/img/";{sub("URL=.*","URL="xx s[i++],$0);print

a[1] -->"    <key value"
a[2] -->""customer/priority"/>"

s[0]-->"customer/priority"/>"
s[1]-->"customer/priority2"/>"
s[2]-->"customer/priority4"/>"

awk ... file2 file1

xx="\"ref/img/" -->  it s just an assing a value.. xx=""ref/img/" (we will add the starting of the new URL value )

sub("URL=.*","URL="xx s[i++],$0)

URL="ref/img/customer/priority"/>
with
URL="xx + s[0]    " ,from our line ($0)
xx->""ref/img/"
s[0]->"customer/priority"/>"
so new URL express --> "URL="ref/img/customer/priority"/>"

<path source="/home/USER/Desktop" value="/home/USER/XYZ/Desktop">
    <key value="customer/priority"/>
    <scm tool="toolname/revision"/>
  </path>

<path source="/home/USER/Exe" value="/home/USER/XYZ/ABC/Exe">
    <key value="customer/priority4"/>
    <scm tool="toolname/revision"/>
  </path>

<path source="/home/USER/OP1" value="/home/USER/XYZ/ABC/OP1">
    <key value="customer/priority2"/>
    <scm tool="toolname/revision"/>
  </path>

<type source="/home/USER/Desktop" Dest="/home/USER/DIR1/Desktop" URL="ref/img/customer/priority"/>
<type source="/home/USER/OP1" URL="ref/img/customer/priority4"/> 
<type source="/home/USER/Exe" Dest="/home/USER/DIR1/Exe" URL="ref/img/customer/priority2"/>

BEGIN { FS="\""; OFS="\"" }
NR==FNR {
    for (i=1; i<=NF; i++) {
    if ($i ~ "<path source")
        key = $(i+1)
    if ($i ~ "<key value")
        val = $(i+1)
    }
    store[key] = val;
    next;
}
{
    for (i=1; i<=NF; i++) {
    if ($i ~ "<type source")
        key = $(i+1)
        if ($i ~ "URL")
        $(i+1) = "ref/img/" store[key]
    }
    print
}

awk -f replace.awk file2 file1