Function gen_epub_book::ops::find_file

pub fn find_file<P: AsRef<Path>>(
    file: P, 
    include_order: &[IncludeDirectory]
) -> Option<&IncludeDirectory>

Find an appropriate IncludeDirectory for the specified file, or None otherwise

Examples

Given:

special_book
├── rendered
│   └── output
│       ├── intro.html
│       ├── main.html
│       └── ending.html
├── previews
│   └── generated
│       └── out
│           ├── intro.html
│           └── main.html
└── gep
   └── special
       ├── intro.html
       └── book.epupp

The following holds:

let default = IncludeDirectory::Unnamed {
    dir: ("".to_string(),
          special_book.join("gep").join("special")),
};
let previews = IncludeDirectory::Named {
    name: "previews".to_string(),
    dir: ("../../previews/generated/out".to_string(),
          special_book.join("previews").join("generated").join("out")),
};
let rendered = IncludeDirectory::Unnamed {
    dir: ("../../rendered/output".to_string(),
          special_book.join("rendered").join("output")),
};

let include_order = [default.clone(), previews.clone(), rendered.clone()];
assert_eq!(find_file(&Path::new("intro.html"), &include_order), Some(&default));
assert_eq!(find_file(&Path::new("main.html"), &include_order), Some(&previews));
assert_eq!(find_file(&Path::new("ending.html"), &include_order), Some(&rendered));
assert_eq!(find_file(&Path::new("cover.png"), &include_order), None);