Cannot add a new helper function to docpad.coffee

[jasonlally]

It seems whenever I try to edit the docpad.coffee file to add another helper, I get an error when issuing docpad run. The new helper function is below getPreparedKeywords, called contentTrim. I do not call contentTrim in any of my templates yet. Here's my updated docpad.cofeee file:

# The DocPad Configuration File
# It is simply a CoffeeScript Object which is parsed by CSON
docpadConfig = {

    # =================================
    # Template Data
    # These are variables that will be accessible via our templates
    # To access one of these within our templates, refer to the FAQ: https://github.com/bevry/docpad/wiki/FAQ

    templateData:

        # Specify some site properties
        site:
            # The production url of our website
            url: "http://website.com"

            # Here are some old site urls that you would like to redirect from
            oldUrls: [
                'www.website.com'
                'website.herokuapp.com'
            ]

            # The default title of our website
            title: "Your Website"

            # The website description (for SEO)
            description: """
                When your website appears in search results in say Google, the text here will be shown underneath your website's title.
                """

            # The website keywords (for SEO) separated by commas
            keywords: """
                place, your, website, keywoards, here, keep, them, related, to, the, content, of, your, website
                """

            # The website author's name
            author: "Your Name"

            # The website author's email
            email: "your@email.com"

            # Styles
            styles: [
                "/styles/twitter-bootstrap.css"
                "/styles/style.css"
            ]

            # Scripts
            scripts: [
                "//cdnjs.cloudflare.com/ajax/libs/jquery/1.10.2/jquery.min.js"
                "//cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"
                "/vendor/twitter-bootstrap/dist/js/bootstrap.min.js"
                "/scripts/script.js"
            ]
        # -----------------------------
        # Helper Functions

        # Get the prepared site/document title
        # Often we would like to specify particular formatting to our page's title
        # we can apply that formatting here
        getPreparedTitle: ->
            # if we have a document title, then we should use that and suffix the site's title onto it
            if @document.title
                "#{@document.title} | #{@site.title}"
            # if our document does not have it's own title, then we should just use the site's title
            else
                @site.title

        # Get the prepared site/document description
        getPreparedDescription: ->
            # if we have a document description, then we should use that, otherwise use the site's description
            @document.description or @site.description

        # Get the prepared site/document keywords
        getPreparedKeywords: ->
            # Merge the document keywords with the site keywords
            @site.keywords.concat(@document.keywords or '').join(', ')

        contentTrim: (str) ->
            if str.length > 200 then str.slice(0, 197) + '...' else str

    # =================================
    # Collections
    # These are special collections that our website makes available to us

    collections:
        pages: (database) ->
            database.findAllLive({pageOrder: $exists: true}, [pageOrder:1,title:1])

        posts: (database) ->
            database.findAllLive({tags:$has:'post'}, [date:-1])

    # =================================
    # Plugins

    plugins:
        downloader:
            downloads: [
                {
                    name: 'Twitter Bootstrap'
                    path: 'src/files/vendor/twitter-bootstrap'
                    url: 'https://codeload.github.com/twbs/bootstrap/tar.gz/master'
                    tarExtractClean: true
                }
            ]

    # =================================
    # DocPad Events

    # Here we can define handlers for events that DocPad fires
    # You can find a full listing of events on the DocPad Wiki
    events:

        # Server Extend
        # Used to add our own custom routes to the server before the docpad routes are added
        serverExtend: (opts) ->
            # Extract the server from the options
            {server} = opts
            docpad = @docpad

            # As we are now running in an event,
            # ensure we are using the latest copy of the docpad configuraiton
            # and fetch our urls from it
            latestConfig = docpad.getConfig()
            oldUrls = latestConfig.templateData.site.oldUrls or []
            newUrl = latestConfig.templateData.site.url

            # Redirect any requests accessing one of our sites oldUrls to the new site url
            server.use (req,res,next) ->
                if req.headers.host in oldUrls
                    res.redirect(newUrl+req.url, 301)
                else
                    next()
}

# Export our DocPad Configuration
module.exports = docpadConfig

error: Something went wrong with the action
error: An error occured:
TypeError: string is not a function
    at Object.docpadConfig.templateData.getPreparedKeywords (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/docpad.coffee:28:82)
    at Object.eval (eval at <anonymous> (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad-plugin-eco/node_modules/eco/lib/compiler.js:19:12), <anonymous>:53:34)
    at Object.eval (eval at <anonymous> (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad-plugin-eco/node_modules/eco/lib/compiler.js:19:12), <anonymous>:103:8)
    at eval (eval at <anonymous> (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad-plugin-eco/node_modules/eco/lib/compiler.js:19:12), <anonymous>:105:6)
    at Function.eco.render (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad-plugin-eco/node_modules/eco/lib/index.js:26:25)
    at EcoPlugin.render (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad-plugin-eco/out/eco.plugin.js:22:35)
    at ambi (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad/node_modules/ambi/out/lib/ambi.js:25:27)
    at Task.<anonymous> (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad/node_modules/event-emitter-grouped/out/lib/event-emitter-grouped.js:38:23)
    at ambi (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad/node_modules/ambi/out/lib/ambi.js:23:18)
    at fire (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad/node_modules/taskgroup/out/lib/taskgroup.js:159:23)
    at b (domain.js:183:18)
    at Domain.run (domain.js:123:23)
    at Task.fire (/Users/jasonlallymoci/Documents/workspace/twitter-bootstrap.docpad/node_modules/docpad/node_modules/taskgroup/out/lib/taskgroup.js:166:25)
    at processImmediate [as _immediateCallback] (timers.js:330:15)

[balupton]

Strange, is your repo's source up somewhere?

[jasonlally]

The full source is here:

https://github.com/jasonlally/jasonlally.github.io/tree/source

I'm running node 0.10.22, npm 1.3.15, docpad 6.57.1

[jasonlally]

I think I found a way to fix my problem. I don't know why exactly, but I was using WebStorm to work on my site and I think it was doing something strange to my whitespace. Anyway, it seems when I edit my docpad.coffee file in Sublime Text, I'm fine.

[jasonlally]

Nevermind, that's not the case. Hmmmm...this is really weird, I can't figure out why sometimes it wants to compile correctly and other times it doesn't.

[lucor]

Check for tabs in your code. You may try to use auto Reformat Code and re-indent manually if needed.

[goboca]

Exactly same problem here using Brackets 1.3 on Windows. Using Notepad++ everything is just fine.