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Hike::Trail

`Trail` is the public container class for holding paths and extensions.

Attributes

aliases[R]

`Index#aliases` is a mutable `Hash` mapping an extension to an `Array` of aliases.

trail = Hike::Trail.new
trail.paths.push "~/Projects/hike/site"
trail.aliases['.htm']   = 'html'
trail.aliases['.xhtml'] = 'html'
trail.aliases['.php']   = 'html'

Aliases provide a fallback when the primary extension is not matched. In the example above, a lookup for “foo.html” will check for the existence of “foo.htm”, “foo.xhtml”, or “foo.php”.

extensions[R]

`Trail#extensions` is a mutable `Extensions` collection.

trail = Hike::Trail.new
trail.paths.push "~/Projects/hike/lib"
trail.extensions.push ".rb"

Extensions allow you to find files by just their name omitting their extension. Is similar to Ruby's require mechanism that allows you to require files with specifiying `foo.rb`.

paths[R]

`Trail#paths` is a mutable `Paths` collection.

trail = Hike::Trail.new
trail.paths.push "~/Projects/hike/lib", "~/Projects/hike/test"

The order of the paths is significant. Paths in the beginning of the collection will be checked first. In the example above, `~/Projects/hike/lib/hike.rb` would shadow the existent of `~/Projects/hike/test/hike.rb`.

Public Class Methods

new(root = ".") click to toggle source

A Trail accepts an optional root path that defaults to your current working directory. Any relative paths added to `Trail#paths` will expanded relative to the root.

# File lib/hike/trail.rb, line 48
def initialize(root = ".")
  @root       = Pathname.new(root).expand_path
  @paths      = Paths.new(@root)
  @extensions = Extensions.new
  @aliases    = Hash.new { |h, k| h[k] = Extensions.new }
end

Public Instance Methods

alias_extension(new_extension, old_extension) click to toggle source

Alias `new_extension` to `old_extension`

# File lib/hike/trail.rb, line 95
def alias_extension(new_extension, old_extension)
  aliases[normalize_extension(new_extension)] = normalize_extension(old_extension)
end
append_extension(*extensions) click to toggle source
Alias for: append_extensions
append_extensions(*extensions) click to toggle source

Append `extension` to `Extensions` collection

# File lib/hike/trail.rb, line 84
def append_extensions(*extensions)
  self.extensions.push(*extensions)
end
Also aliased as: append_extension
append_path(*paths) click to toggle source
Alias for: append_paths
append_paths(*paths) click to toggle source

Append `path` to `Paths` collection

# File lib/hike/trail.rb, line 67
def append_paths(*paths)
  self.paths.push(*paths)
end
Also aliased as: append_path
entries(*args) click to toggle source

`Trail#entries` is equivalent to `Dir#entries`. It is not recommend to use this method for general purposes. It exists for parity with `Index#entries`.

# File lib/hike/trail.rb, line 159
def entries(*args)
  index.entries(*args)
end
find(*args, &block) click to toggle source

`Trail#find` returns a the expand path for a logical path in the path collection.

trail = Hike::Trail.new "~/Projects/hike"
trail.extensions.push ".rb"
trail.paths.push "lib", "test"

trail.find "hike/trail"
# => "~/Projects/hike/lib/hike/trail.rb"

trail.find "test_trail"
# => "~/Projects/hike/test/test_trail.rb"

`find` accepts multiple fallback logical paths that returns the first match.

trail.find "hike", "hike/index"

is equivalent to

trail.find("hike") || trail.find("hike/index")

Though `find` always returns the first match, it is possible to iterate over all shadowed matches and fallbacks by supplying a block.

trail.find("hike", "hike/index") { |path| warn path }

This allows you to filter your matches by any condition.

trail.find("application") do |path|
  return path if mime_type_for(path) == "text/css"
end
# File lib/hike/trail.rb, line 138
def find(*args, &block)
  index.find(*args, &block)
end
index() click to toggle source

`Trail#index` returns an `Index` object that has the same interface as `Trail`. An `Index` is a cached `Trail` object that does not update when the file system changes. If you are confident that you are not making changes the paths you are searching, `index` will avoid excess system calls.

index = trail.index
index.find "hike/trail"
index.find "test_trail"
# File lib/hike/trail.rb, line 152
def index
  Index.new(root, paths, extensions, aliases)
end
prepend_extension(*extensions) click to toggle source
Alias for: prepend_extensions
prepend_extensions(*extensions) click to toggle source

Prepend `extension` to `Extensions` collection

# File lib/hike/trail.rb, line 78
def prepend_extensions(*extensions)
  self.extensions.unshift(*extensions)
end
Also aliased as: prepend_extension
prepend_path(*paths) click to toggle source
Alias for: prepend_paths
prepend_paths(*paths) click to toggle source

Prepend `path` to `Paths` collection

# File lib/hike/trail.rb, line 61
def prepend_paths(*paths)
  self.paths.unshift(*paths)
end
Also aliased as: prepend_path
remove_extension(extension) click to toggle source

Remove `extension` from `Extensions` collection

# File lib/hike/trail.rb, line 90
def remove_extension(extension)
  self.extensions.delete(extension)
end
remove_path(path) click to toggle source

Remove `path` from `Paths` collection

# File lib/hike/trail.rb, line 73
def remove_path(path)
  self.paths.delete(path)
end
root() click to toggle source

`Trail#root` returns root path as a `String`. This attribute is immutable.

# File lib/hike/trail.rb, line 56
def root
  @root.to_s
end
stat(*args) click to toggle source

`Trail#stat` is equivalent to `File#stat`. It is not recommend to use this method for general purposes. It exists for parity with `Index#stat`.

# File lib/hike/trail.rb, line 166
def stat(*args)
  index.stat(*args)
end
unalias_extension(extension) click to toggle source

Remove the alias for `extension`

# File lib/hike/trail.rb, line 100
def unalias_extension(extension)
  aliases.delete(normalize_extension(extension))
end

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