Fix repetition of :out-dir when perun processes a file more than once

[bhagany]

@arichiardi I think that this applies pretty much the same fix you merged in #200, but everywhere

[arichiardi]

Ok cool so I will test this out against the current working site I have and report back

[arichiardi]

So I checked this and now with the following:

(def posts-dir "blog/posts")
(perun/render :out-dir posts-dir :renderer 'com.andrearichiardi.blog.post/render-page)

I get:

target/
├── blog
│   └── posts
│       └── public
│           ├── cljs-on-gh-pages.html
│           ├── cljs-replumb-require.html
│           ├── replumb-ast.html
│           └── semantic-perun-blog.html
└── public
    ├── blog
    ...

While before it was correctly under public, also note that all my posts are in resources (not resources/public). I feel this is expected so the patch seems to work for me.
Should I try something else just to make sure?

[arichiardi]

Uhm, but now if I move the posts to public it is not rendering them anymore.

[arichiardi]

this lines seems to me to build the path that would work for me, public before the specified :out-dir.

[arichiardi]

So ok, I finally settled with another solution, blog posts are in resources/blog/posts and the render function is a simple:

(perun/render :renderer 'com.andrearichiardi.blog.post/render-page)

[arichiardi]

It would be great to merge this one as well and maybe deploy a SNAPSHOT with both this and the lessc task 😉