vim tabular only on the first match on the line?

Question

I\'m trying to format some python code with the tabular.vim plugin. It\'s currently a sqlalchemy declarative class, and looks something like this:

id     =           


        

Answer 1

Excellent plugin to do it: vim-easy-align.

Answer 2

You can use this command:

:Tabularize /^[^=]*\zs=

The pattern only matches the first =.

---

You can add these two line to ~/.vim/after/plugin/TabularMaps.vim

AddTabularPattern 1=    /^[^=]*\zs=
AddTabularPattern 1==   /^[^=]*\zs=/r0c0l0

---

Next time, simply run:

:Tabularize 1=

If you don't need spaces around =, run this:

:Tabularize 1==

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Answer 3

The suggestions above are good, but in this case they are a little too complicated and require too much typing. How about:

:Tab /=.*/

This works just fine -- match the first equal sign and everything after it, aligned left (default, which works just fine!).

Answer 4

As per this answer, instead of creating a static mapping for each case, you can do this dynamically by setting up a vim command like this:

command! -nargs=1 -range TabFirst exec <line1> . ',' . <line2> . 'Tabularize /^[^' . escape(<q-args>, '\^$.[?*~') . ']*\zs' . escape(<q-args>, '\^$.[?*~')

With this command, if you wanted to align based on the first = then you could do:

:TabFirst =

Or, if you wanted to align on the first { you could do:

:TabFirst {

This supports range selections as well as Tabularize's smart selection.