{"action":"created","comment":{"url":"https://api.github.com/repos/artsy/artsy.github.com/pulls/comments/29338342","id":29338342,"diff_hunk":"@@ -0,0 +1,63 @@\n+---\n+layout: post\n+title: How we Open Source'd Eigen \n+date: 2015-04-28\n+comments: true\n+categories: [ios, mobile, eigen]\n+author: Orta Therox\n+github-url: https://www.github.com/orta\n+twitter-url: http://twitter.com/orta\n+blog-url: http://orta.io\n+---\n+\n+It was 95 days ago, and I was sitting before of my computer in NYC. I loaded my terminal, opened [TapTalk](https://taptalk.me) on my phone, tapped on my collegue [Ash's](http://ashfurrow.com) face and held my finger there. I paused, this moment was a long time, it was worth waiting. I switched the camera from my face to the screen with the terminal open.\n+\n+This moment was probably the most nervous I had been in years. It showed `git push origin master`. I said \"it's happening.\" I hit return. A new era in the Artsy mobile team had started. A few minutes later, I wrote this tweet:\n+\n+<center>\n+<blockquote class=\"twitter-tweet\" data-cards=\"hidden\" lang=\"en\"><p>We have open source’d the <a href=\"https://twitter.com/artsy\">@Artsy</a> iOS app.&#10;&#10;<a href=\"https://t.co/c1SWtHmUgy\">https://t.co/c1SWtHmUgy</a>&#10;&#10;🎉</p>&mdash; Ørta (@orta) <a href=\"https://twitter.com/orta/status/558395611754819586\">January 22, 2015</a></blockquote>\n+</center>\n+\n+\n+Let's go over the process we went through to get to that point.\n+\n+<!-- more -->\n+\n+Credit where credit is due, when we were [working on Eidolon](/blog/2014/11/13/eidolon-retrospective/), our CTO [dB](http://code.dblock.org/) just casually tossed the idea that, really, Eigen should be open source too. This totally threw me for a loop, we were only just getting to a point where we could build an app from scratch in the open. Trying to get a project that had existed for years and had it's own momentum converted would take a lot of thinking about.\n+\n+We devoted time at the end of 2014 to understand what the constraints were for getting the app opened. From a purely functional perspective we would have to start with a [drastic decision](https://github.com/artsy/mobile/issues/11) around the repo itself. \n+\n+### The Repo\n+\n+We opted to go for a total repo switch, removing all history. There were a lot of places where keys could have been hiding within the app. To get this done we migrated the existing `eigen` to `eigen-private` on github, and did a fresh `git init`. People who have joined Artsy Mobile post-OSS have never even cloned the `eigen-private` repo. So I feel good about this call.\n+\n+We used the last few moments of the private repo to remove all of the default Apple copyright notices. 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