Heroku Buildpack option

[bensheldon]

via @eddietejeda from a pull request on the nodetiles repo in my account that I just blew away:

heroku config:add BUILDPACK_URL=git://github.com/bloomtime/heroku-buildpack-nodejs.git#cairo heroku config:add LD_PRELOAD='/app/node_modules/canvas/cairo/libcairo.so /app/node_modules/canvas/lib/libpixman-1.so.0 /app/node_modules/canvas/lib/libfreetype.so.6' heroku config:add LD_LIBRARY_PATH=/app/node_modules/canvas/cairo

[bensheldon]

@@ -12,10 +12,11 @@ Installation on Heroku
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 2. Within the directory, `heroku create --stack cedar`
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 3. Setup your heroku environment variables for node-canvas-heroku
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-   `$ heroku config:add LD_PRELOAD='/app/node_modules/canvas/cairo/libcairo.so /app/node_modules/canvas/lib/libpixman-1.so.0 /app/node_modules/canvas/lib/libfreetype.so.6' --app <your-app>
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-   $ heroku config:add LD_LIBRARY_PATH=/app/node_modules/canvas/cairo --app <your-app>`
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-   
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-   IMPORTANT: replace the `<your-app>` at the end of each command with your Heroku app's name, e.g. 'furious-sparrow-2089'
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+
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+   `heroku config:add BUILDPACK_URL=git://github.com/bloomtime/heroku-buildpack-nodejs.git#cairo`
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+   `heroku config:add LD_PRELOAD='/app/node_modules/canvas/cairo/libcairo.so /app/node_modules/canvas/lib/libpixman-1.so.0 /app/node_modules/canvas/lib/libfreetype.so.6'`
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+   `heroku config:add LD_LIBRARY_PATH=/app/node_modules/canvas/cairo`
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+
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 4. `git push heroku master`
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 5. Rejoice / Open an issue that these instructions are inadequate
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