formatUnifiedDiffOutput.awk

/@@/ {
    gsub(/[+-]/, "")
    old = $2
    numFields = split(old, fld, ",")
    oldLineNum = fld[1]
    numFields == 1 ? oldSize = 1 : oldSize = fld[2]

    new = $3
    numFields = split(new, fld, ",")
    newLineNum = fld[1]
    numFields == 1 ? newSize = 1 : newSize = fld[2]

    # printf("old: %-10s new: %s\n",old,new)
    # printf("oldLineNum: %-6s newLineNum: %-6s\n",oldLineNum,newLineNum)
    # printf("oldSize: %-6s newSize: %-6s\n",oldSize,newSize)
    if (oldSize == 0) {
        newSize == 1 ? pluralLines = "line" : pluralLines = "lines"
        printf(\
            "==> added %d %s after line %s\n", newSize, pluralLines, oldLineNum\
        )
    }
    else if (newSize == 0) {
        oldSize == 1 ? pluralLines = "line" : pluralLines = "lines"
        printf(\
            "==> deleted %d %s at line %s\n", oldSize, pluralLines, oldLineNum\
        )
    }
    else {
        oldSize == 1 ? pluralLines = "line" : pluralLines = "lines"
        printf(\
            "==> changed %d %s at line %s\n", oldSize, pluralLines, oldLineNum\
        )
    }

    next
}

/--- / { next }

/\+\+\+ / { next }

/=HYPERLINK/ {
    sub(/-.*=HYPERLINK.*;"/, "-")
    sub(/\+.*=HYPERLINK.*;"/, "+")
    sub(/"\)/, "")
}

{ print }