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Top Forums Shell Programming and Scripting Compare files using Unix scripting Post 302702805 by agama on Tuesday 18th of September 2012 10:21:06 PM
Old 09-18-2012
If your diff output is as simple as you posted, then try this:

Code:
awk '
    { gsub( "^.", "& " ); }   # needed if leading "<" isnt always separated by whitespace from rest of line
    /^</ {
        if( old[$2] )
            printf( "%s  old=\"%s\"  new=\"%s\"\n", $2, old[$2], $3 );
        else
            new[$2] = $3;
    }
    /^>/ {
        if( new[$2] )
            printf( "%s  old=\"%s\"  new=\"%s\"\n", $2, $3, new[$2] );
        else
            old[$2] = $3;
    }
'  input >output

Output should be something like:

Code:
abc  old="10"  new="15"
xyz  old="02"  new="05"

 

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CUT-DIFF(1)							  Cutter's manual						       CUT-DIFF(1)

NAME
cut-diff - show difference between 2 files with color SYNOPSIS
cut-diff [option ...] file1 file2 DESCRIPTION
cut-diff is a diff command that uses diff feature in Cutter. It shows difference with color. It's recommended that you use a normal diff(1) when you want to use with patch(1) or you don't need color. OPTIONS
--version cut-diff shows its own version and exits. -c [yes|true|no|false|auto], --color=[yes|true|no|false|auto] If 'yes' or 'true' is specified, cut-diff uses colorized output by escape sequence. If 'no' or 'false' is specified, cut-diff never use colorized output. If 'auto' or the option is omitted, cut-diff uses colorized output if available. The default is auto. -u, --unified cut-diff uses unified diff format. --context-lines=LINES Shows diff context around LINES. All lines are shown by default. When unified diff format is used, 3 lines are shown by default. --label=LABEL, -L=LABEL Uses LABEL as a header label. The first--label option value is used as file1's label and the second --label option value is used asfile2's label. Labels are the same as file names by default. EXIT STATUS
The exit status is 0 for success, non-0 otherwise. TODO: 0 for non-difference, 1 for difference and non-0 for errors. EXAMPLE
In the following example, cut-diff shows difference between file1 and file2: % cut-diff file1 file2 In the following example, cut-diff shows difference between file1 and file2 with unified diff format: % cut-diff -u file1 file2 SEE ALSO
diff(1) Cutter February 2011 CUT-DIFF(1)
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