handle local variables in functions inside "mark occurrences"

[de-jcup]

Situation

#!/bin/bash 

function startMe() {
    local data
    echo "hello world" >> $data
    
    echo "xx:$data"

}

startMe

data cannot be marked - local variables in functions are currently not recognized

Wanted

local xyz and also
local xyz=... shall be recognized as local variables

These local variables shall only be marked inside the function!

Solution

• if not already done keep "isLocal" flag inside BashVariable. So we know if its a local variable or not
• introduce a getFunction():BashFunction method. For global variables this will return null
• getUsages() for a local variable may only return the usages inside the function - this can be done by not iterating over the complete tokens, but only those inside the function (this information should be already available)