As suggested [here](https://stackoverflow.com/questions/311118/real-time-latex/398322#398322), `latexmk` is a handy way to continually compile your document whenever the source changes.  But often when you&#39;re working on a document you&#39;ll end up with errors and then `latex` will panic and wait for user input before continuing.  That can get very annoying, especially recently when I hacked up something to compile `latex` directly from an [etherpad](http://etherpad.com) document, which saves continuously as you type.

Is there a setting for `latex` or `latexmk` to make it just abort with an error message if it can&#39;t compile?  Or, if necessary, how would I set up some kind of Expect script to auto-dismiss LaTeX&#39;s complaints?

(I had thought `pdflatex`&#39;s option `-halt-on-error` would do the trick but apparently not.)

Bonus question:  Skim on Mac OSX is a nice pdf viewer that autorefreshes when the pdf changes (unlike Preview), *except* that whenever there&#39;s a latex error it makes you reconfirm that you want autorefreshing.  Texniscope doesn&#39;t have this problem, but I had to ditch Texniscope for [other reasons](https://stackoverflow.com/questions/382608/fonts-in-pdf-documents-screwed).  Is there a way to make Skim always autorefresh, or is there another viewer that gets this right?

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### ADDED: Mini-tutorial on `latexmk` based on the answer to this question:

1. Get `latexmk` here:  &lt;http://www.phys.psu.edu/~collins/software/latexmk-jcc/&gt;

2. Add the following to your `~/.latexmkrc` file:

        $pdflatex = &#39;pdflatex -interaction=nonstopmode&#39;;

    (For OS X with Skim)

        $pdf_previewer = &quot;open -a /Applications/Skim.app&quot;;


3. While editing your source file, `foo.tex`, run the following in a terminal:

        latexmk -pvc -pdf foo.tex

4. Use [Skim](http://skim-app.sourceforge.net/) or another realtime pdf viewer to view foo.pdf. For Skim, just look at the “Sync” tab in Skim’s preferences and set it up for your editor.  


Voila!  Hitting save on `foo.tex` will now cause `foo.pdf` to refresh without touching a thing.

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Don't make me manually abort a LaTeX compile when there's an error