This Week in Glean: FOG progress report (#15)

Co-authored-by: Michael Droettboom <mdboom@gmail.com>

_posts/2020-10-06-fog-progress-report.md

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+---
+permalink: "/{{ year }}/{{ month }}/{{ day }}/fog-progress-report"
+title: "This Week in Glean: FOG progress report"
+published_date: "2020-10-06 16:00:00 +0200"
+layout: post.liquid
+data:
+  route: blog
+  tags:
+    - mozilla
+    - rust
+---
+
+(“This Week in Glean” is a series of blog posts that the Glean Team at Mozilla is using to try to communicate better about our work. They could be release notes, documentation, hopes, dreams, or whatever: so long as it is inspired by Glean.)
+
+All "This Week in Glean" blog posts are listed in the [TWiG index](https://mozilla.github.io/glean/book/appendix/twig.html)
+(and on the [Mozilla Data blog](https://blog.mozilla.org/data/category/glean/)).
+
+---
+
+About a year ago chutten started the "This Week in Glean" series with an initial
+[blog post about Glean on Desktop](https://chuttenblog.wordpress.com/2019/10/17/this-week-in-glean-glean-on-desktop-project-fog/).
+Back then we were just getting started to bring Glean to Firefox Desktop.
+No code had been written for Firefox Desktop, no proposals had been written to discuss how we even do it.
+
+Now, 12 months later, after four completed milestones, a dozen or so proposal and quite a bit of code,
+the Project Firefox on Glean (FOG) is finally getting into a stage where we can actually use and test it.
+It's not ready for prime time yet, but FOG is enabled in Firefox Nightly already.
+
+Over the past 4 weeks I've been on and off working on building out our support for a C++ and a JavaScript API.
+Soon Firefox engineers will be able to instrument their code using Glean.
+In C++ this will look like:
+
+```cpp
+mozilla::glean::test_only::count_something.Add(42);
+```
+
+JavaScript developers will use it like this:
+
+```javascript
+Glean.test_only.count_something.add(32);
+```
+
+My work is done in [bug 1646165][mla].
+It's still under review and needs some fine-tuning before that, but I hope to land it by next week.
+We will then gather some data from Nightly and validate that it works as expected ([bug 1651110][nightlyvalidation]),
+before we let it ride the trains to land in stable ([bug 1651111][trainride]).
+
+Our work won't end there.
+With my initial API work landing we can start supporting all metric types,
+we still need to figure out some details of how FOG will handle IPC,
+and then there's the whole process of convincing other people to use the new system.
+
+[mla]: https://bugzilla.mozilla.org/show_bug.cgi?id=1646165
+[trainride]: https://bugzilla.mozilla.org/show_bug.cgi?id=1651111
+[nightlyvalidation]: https://bugzilla.mozilla.org/show_bug.cgi?id=1651110
+
+2020 will be the year of Glean on the Desktop.