readme driven development!

README.md

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+gollum -- A wiki built on top of Git
+====================================
+
+## DESCRIPTION
+
+Gollum is a simple wiki that uses Git for storage and revision histories. It
+is designed so that you can create a compliant Git repository (known as a
+Gollum repository) either by hand, by calling API methods, or via the web
+interface.
+
+
+## REPO STRUCTURE
+
+A Gollum repository's contents are designed to be human editable. Page content
+is written in `page files` and may be organized into directories any way you
+choose. Other content (images, CSS, JavaScript, PDFs, etc) may also be
+present and organized in the same way.
+
+Page files may be written in formats that render to HTML. Currently supported
+formats are Markdown, Textile, and HTML. They must have the proper file
+extension that corresponds to the format of the content:
+
+  * Markdown: .markdown, .mkdn, .md
+  * Textile: .textile
+  * HTML: .html
+
+Even though page files may be placed in any directory, there is still only a
+single namespace for page names, so all page files should have globally unique
+names regardless of where there are located in the repository.
+
+CSS and JavaScript (.css and .js) files are automatically detected and
+injected into page files that live at the same directory level or lower. This
+allows you to easily apply CSS and JS to specific sets of pages.
+
+
+## WIKI LINKS
+
+Wiki links in Gollum are processed before page content is converted into HTML.
+They take the following form:
+
+    [[Page Name]]
+
+If you'd like the link text to be something other than the page name, you can
+use the advanced form:
+
+    [[Page Name | Alternate Text]]
+
+The above wiki links will create a link to the corresponding page file named
+`page-name.ext` where `ext` may be any of the allowed extension types. The
+conversion is as follows:
+
+  1. Replace any non-alpha characters with a dash
+  2. Lowercase all alpha characters
+
+Here are a few more examples:
+
+    [[Tom "TPW" Preston-Werner]] -> tom--tpw--preston-werner.ext
+    [[Quantum Physics | quantum]] -> quantum-physics.ext
+
+The page file may exist anywhere in the directory structure of the repository.
+Gollum does a breadth first search and uses the first match that it finds.
+
+## STATIC LINKS
+
+To link to static files that are contained in the Gollum repository you should
+use the static link tag. Because this tag produces a URL instead of a full
+link tag, it is contained within single brackets. It uses the `file:`
+identifier to mark the contents as a static file reference. Static links are
+processed before page content is converted into HTML.
+
+You can use either absolute or relative paths to specify the file location.
+Absolute paths (that start with a slash) are bound to the repository root.
+
+    [file:/gollum.pdf]
+    [file:/docs/gollum.pdf]
+
+Relative paths (without a beginning slash) are referenced from the location of
+the page file. For example, if your page file is `documentation.md` and is
+stored in the `docs` directory under the repository root, then the following
+link in `documentation.md` will produce a URL to `/docs/gollum.pdf`:
+
+    [file:gollum.pdf]
+
+In Markdown, a link would take the following form:
+
+    [Gollum Manual]([file:gollum.pdf])
+
+In Textile, it would look like this:
+
+    "Gollum Manual":[file:gollum.pdf]
+
+And in HTML, like so:
+
+    <img src="[file:gollum.pdf]" alt="Gollum Manual" />
+
+
+## ESCAPING WIKI AND STATIC LINKS
+
+If you need the literal text of a wiki or static link to show up in your final
+wiki page, simply preface the link with a single quote (like in LISP):
+
+    '[[Wiki Link]]
+    '[file:foo.jpg]
+
+This is useful for writing about the link syntax in your wiki pages.
+
+
+## SYNTAX HIGHLIGHTING
+
+In Markdown and Textile page files you can get automatic syntax highlighting
+for a wide range of languages (courtesy of Pygments) by using the following
+syntax:
+
+    ```ruby```
+    def foo
+      puts 'bar'
+    end
+    ```
+
+The block must start with three backticks (as the first characters on the
+line). After that comes the name of the language that is contained by the
+block. The language must be one of the `short name` lexer strings supported by
+Pygments. See the [list of lexers](http://pygments.org/docs/lexers/) for valid
+options. Following the language name you may add an additional three backticks
+for aesthetic reasons (but this is not required). The block must end with at
+least three backticks as the first characters on a line. You may add more
+backticks for balance if you like.
+
+
+## API DOCUMENTATION
+
+The Gollum API allows you to retrieve raw or formatted wiki content from a Git
+repository, write new content to the repository, and collect various meta data
+about the wiki as a whole.
+
+Initialize the Gollum::Repo object:
+
+    # Require rubygems if necessary
+    require 'rubygems'
+
+    # Require the Gollum library
+    require 'gollum'
+
+    # Create a new Gollum object by initializing it with the path to the
+    # Git repository.
+    gollum = Gollum.new("my-gollum-repo.git")
+    # => <Gollum::Repo>
+
+Get the latest HTML formatted version of the given canonical page name:
+
+    page = gollum.formatted_page('page-name')
+    # => <Gollum::Page>
+
+    page.data
+    # => "<h1>My wiki page</h1>"
+
+    page.format
+    # => :markdown
+
+    vsn = page.version
+    # => <Gollum::Version>
+
+    vsn.id
+    # => '3ca43e12377ea1e32ea5c9ce5992ec8bf266e3e5'
+
+Get the latest raw version of the given canonical page name:
+
+    gollum.raw_page('page-name')
+    # => <Gollum::Page>
+
+    page.data
+    # => "# My wiki page"
+
+    page.format
+    # => :markdown
+
+    page.version
+    # => <Gollum::Version>
+
+Get a list of versions for a given canonical page name:
+
+    vsns = gollum.page_versions('page-name')
+    # => [<Gollum::Version, <Gollum::Version, <Gollum::Version>]
+
+    vsns.first.id
+    # => '3ca43e12377ea1e32ea5c9ce5992ec8bf266e3e5'
+
+    vsns.first.date
+    # => Sun Mar 28 19:11:21 -0700 2010
+
+Get a specific version of a given canonical page file:
+
+    gollum.formatted_page('page-name', '5ec521178e0eec4dc39741a8978a2ba6616d0f0a')
+    gollum.raw_page('page-name', '5ec521178e0eec4dc39741a8978a2ba6616d0f0a')
+
+Get the latest version of a given static file:
+
+    file = gollum.static_file('asset.js')
+    # => <Gollum::File>
+
+    file.data
+    # => "alert('hello');"
+
+    file.version
+    # => <Gollum::Version>
+
+Get a specific version of a given static file:
+
+    gollum.static_file('asset.js', '5ec521178e0eec4dc39741a8978a2ba6616d0f0a')
+
+Write a new version of a given canonical page file (the file will be created
+if it does not already exist) and commit the change.
+
+    gollum.write_page('page-name', 'My wiki page contents')
+
+Write a new version of a given canonical page file and specify a commit
+message:
+
+    gollum.write_page('page-name', 'My wiki page contents', 'commit message')
+
+To delete a page and commit the change:
+
+    gollum.delete_page('page-name')
+
+Once again, you can optionally specify a commit message:
+
+    gollum.delete_page('page-name', 'commit message')