align equal signs in a visual selection

[burnt43]

foo1 = 100
foobar2 = 5000

there should be a mapping like l= (align equals) to change it so it looks like

foo1    = 100
foobar2 = 5000

I'll need a function that can iterate over a visual selection. I'll need to use

line("'<")
line("'>'")

to get the begin and end lines of the visual selection and find the column of the furthest equal sign and change all the lines to align with that column

[burnt43]

I've added this functionality only in visual mode in commit 85ebb43

[burnt43]

I need to:

• make this work in normal mode