Catalonia Did It.

Today, on October 27, 2017, the Parliament of Catalonia, under the leadership of Catalan President Carles Puigdemont, formally declared its independence from Spain.
http://www.bbc.com/news/world-europe-41780116
The new "Republic of Catalonia" is presently unrecognized by any state, including the Spanish government, which will likely move to seize control over the formerly autonomous region of Spain.

And...as of today, Puigdemont is no longer the President of Catalonia, or at least not officially. The Spanish central government moved today to sack the Catalan regional government and has imposed what I guess is a less violent form of martial law.

Good for them!

Mharman: Nope, not good for them. Spain won't let it happen.

Dassault Papillon: Hey, anyone remember what happened last time Spain had a civil war?

Yeah the oppressed people of Catalonia, we all sympathize with them.

admin: Yeah, they fell under a fascist dictatorship that lasted until the 1970s.

Well, I do believe it's over: today's massive pro-union demonstration in Barcelona made it clear that even among the Catalan people Puigdemont and his independence agenda do not enjoy cross-partisan support. There will be no Catalan uprising against Spain that has the backing of most of its people, and the pro-independence crowd probably doesn't care enough to make a serious effort to clamor for their independence in the face of such opposition. Revolt would be pretty useless anyway, seeing as how Spain is not a gun society like America and seeing as how such would not have the backing of the military. There's been discussion of Puigdemont fleeing Catalonia at this point to escape criminal conviction by the Spanish government, perhaps to carry on the fight from abroad, but even if this were to happen it's clear that his movement is losing momentum by the day.
So at this point I can't say there's any viable path for de jure or even de facto Catalan Independence, or at least not in the short term.