nginx redirect all directories except one - mod-rewrite

Question

I'm using nginx 1.0.8 and I'm trying to redirect all visitors from www.mysite.com/dir to google search page http://www.google.com/search?q=dir where dir is a variable, however if dir=="blog"( www.mysite.com/blog) I just want to load the blog content(Wordpress).
Here is my config :
location / {
root html;
index index.html index.htm index.php;
}
location /blog {
root html;
index index.php;
try_files $uri $uri/ /blog/index.php;
}
location ~ ^/(.*)$ {
root html;
rewrite ^/(.*) http://www.google.com/search?q=$1 permanent;
}
if I do this even www.mysite.com/blog will be redirected to google search page. If I delete the last location www.mysite.com/blog works great.
From what I've read here: http://wiki.nginx.org/HttpCoreModule#location it seems that the priority will be first on regular expressions and that first regular expression that matches the query will stop the search.
Thanks

Answer 1

location / {
rewrite ^/(.*)$ http://www.google.com/search?q=$1 permanent;
}
location /blog {
root html;
index index.php;
try_files $uri $uri/ /blog/index.php;
}
http://nginx.org/r/location
http://nginx.org/en/docs/http/request_processing.html

Answer 2

This situation can also be handled using only regex. Though this is a very old question and it has been marked answered, I'm adding another solution.
If you use multiple loop forwards using reverse proxy this is the easiest way without having to add a separate location block for every directory.
root html;
index index.php;
location / { #Match all dir
try_files $uri $uri/ $uri/index.php;
}
location ~ /(?!blog|item2)(.*)$ { #Match all dir except those dir items skipped
rewrite ^/(.*) http://www.google.com/search?q=$1 permanent;
}