Re: parameter expansion with `:` does not work

[Kerin Millar]

On Thu,  8 Jul 2021 02:54:06 +0200 (CEST)
lisa-asket@perso.be wrote:

> As I was in it, have also changed  
> 
> 
> 
> fdir=${fdir:-$PWD}

This makes sense.

> 
> 
> 
> to 
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> fdir=${fdir:=$PWD} 

Here, you are using a form of parameter expansion that intrinsically performs 
variable assignment, only to redundantly assign the result of the expansion to 
the same variable once again. In a roundabout fashion, it ends up proving 
Greg's point. I'd suggest temporarily disavowing yourself of the 
${parameter:=word} form, for the time being.

-- 
Kerin Millar