Error when saving markdown file about vim-markdown-preview HOT 14 CLOSED

@perrygeo to check, do you have either markdown or grip installed as per the requirements?

What happens if you manually do markdown file.md > /tmp/vim-markdown-preview.html?

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I'm having some trouble reproducing this. Can you pull the latest commits and see if the error persists?

To get more context:

1. What operating system are you using?
2. What version of vim are you on?
3. What happens if you remove all the buffer specific parts of the variables in question? For example, remove the b: before the variables in your error.

Thanks!

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Hey @zarry are you using any of the provided vim-markdown-preview options? If so, let me know.

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I found this problem went away when I surrounded the equals signs with space characters

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I can reproduce this error on OS X Yosemite, vim 7.4, installed in bundle for pathogen. This error occurs out of the box for me.

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@perrygeo having the same issue out of the box

Error detected while processing function Vim_Markdown_Preview:
line   17:
E121: Undefined variable: b:vim_markdown_preview_github
E15: Invalid expression: b:vim_markdown_preview_github == 1
line   40:
E121: Undefined variable: b:vim_markdown_preview_temp_file
E15: Invalid expression: b:vim_markdown_preview_temp_file == 1

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@zarry @perrygeo @michaelghinrichs Can you pull again? I changed the way variables were checked and moved everything to a global scope in 1cb7414

Let me know if this error persists.

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The error goes away for me. But it doesn't function properly - Ctrl-P opens a browser window at file:///tmp/vim-markdown-preview.html but the file is blank

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@perrygeo Are you using any flags (possibly let vim_markdown_preview_temp_file=1?) If so, check to see if the file /tmp/vim-markdown-preview.html actually exists. It could be that the file is being deleted before your browser opens it.

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I haven't messed with any variables, just installed to ~/.vim/bundle, open md file, Ctrl-P. The file is created and still exists but is empty

$ ls -alth /tmp/vim-markdown-preview.html
-rw-r--r--  1 mperry  wheel     0B Nov 11 15:01 /tmp/vim-markdown-preview.html

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Yes, I have grip installed globally. In fact that's what I've been using to render markdown in lieu of a working vim plugin.

$ grip
 * Running on http://localhost:6419/ (Press CTRL+C to quit)

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In order to use grip (and Github flavored markdown), put github flag in your vimrc:

let vim_markdown_preview_github=1

Apologies if this was unclear from the README. Does this work?

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@JamshedVesuna Yes! That was it. Can you specify that in Requirements (Options should be optional). In chosing markdown vs grip as your rendering engine, it's not clear that the later choice requires additional action.

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Added quick documentation in b51ecf2.

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