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+---
+title: "Summer Roadmap 2023"
+date: 2023-05-15T08:38:08+03:00
+---
+
+Now that I have 6 weeks of employment remaining, my wife encouraged me to come
+up with something to do for the summer, and possibly after it. This post will
+list a few ideas I've been thinking about.
+
+Next 6 weeks of employment
+--------------------------
+
+The roadmap [described 6 weeks ago]({{< ref
+"log/2023/my-zig-and-go-work-for-the-next-3-months" >}}) is still mostly
+applicable. Quick update:
+
+- The blog post I have mentioned [has been published][uber-zig-blog-post].
+  Hooray.
+- For the next 6 weeks I will work on making the Zig/Go ecosystem as best as I
+  can. Many thanks to my leadership for understanding the long-term importance
+  of this initiative.
+- I have de-prioritized `hermetic_cc_toolchain`'s MacOS target support.
+
+[uber-zig-blog-post]: https://www.uber.com/en-US/blog/bootstrapping-ubers-infrastructure-on-arm64-with-zig/
+
+With employment out of the way, what is waiting for me past June 30?
+
+Project 1: City Limits
+----------------------
+
+Hereby is my definition of "living in a city" for the purpose of this project:
+
+> If there is a coffee shop within 15 minute walk from a location, then the
+> location is indeed a town/city location. Locations outside a 15-minute walk
+> are "not a city": suburbia, farmstead, homestead, whatever you want to call
+> it.
+
+Given the above definition of a city, I want to draw the a map of *Vilnius City
+Boundaries*. I have not found the suitable algorithm yet: there are many
+algorithms to calculate the duration from point A to B, but not an algorithm
+which will draw the boundaries from point A (the coffee shop) to all reachable
+points under a certain [cost][cost].
+
+Of course, this definition is a joke. Not all of us live for coffee. I have a
+few more applications for extending such a map, but the coffee is the first
+one.
+
+[cost]: http://theory.stanford.edu/~amitp/GameProgramming/MovementCosts.html
+
+Project 2: my take on universal headers
+---------------------------------------
+
+Caution: this section is highly technical and probably interesting only to
+folks who compile lots C or C++ applications.
+
+Zig [universal-headers][universal-headers] project was started about 2 years
+ago by now, but still quite far from completion. This project is important for
+me, because I want to easily compile my software with different versions of
+glibc using only the command-line switch. Zig already offers that for the
+symbols exposed by glibc, but not for the headers. Currently zig offers headers
+for only latest glibc versions, which [is][9485] [problematic][10713].
+
+My take on universal-headers:
+1. Compress all headers with `zstd --ultra -22`
+2. Make the compressed tarball [seekable][seekable], so it can be extracted
+   faster.
+3. When user requests a specific glibc version, extract the headers for that
+   particular version only and point the compiler to that directory.
+
+Currently [`ziglang@universal-headers/headers`][all-headers], when compressed
+naïvely, don't weigh that much:
+
+    $ ls --block-size=M -1s headers.tar headers.tar.zst
+    1121M headers.tar
+      17M headers.tar.zst
+
+Granted, they are incomplete (looks like only glibc 2.33-2.36 are present,
+whereas we want at least [2.17][rhel-glibc]), but a reasonable start.
+
+[universal-headers]: https://github.com/ziglang/universal-headers
+[9485]: https://github.com/ziglang/zig/issues/9485
+[10713]: https://github.com/ziglang/zig/issues/10713
+[seekable]: https://github.com/facebook/zstd/blob/7806d803383b75b00868a5367154a18caf535a92/contrib/seekable_format/zstd_seekable_compression_format.md
+[all-headers]: https://github.com/ziglang/universal-headers/tree/093de8cdcc2b7cb1d50342ef79812a864a8fde74/headers
+[rhel-glibc]: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.0_release_notes/sect-red_hat_enterprise_linux-7.0_release_notes-compiler_and_tools-glibc
+
+Project 3: home and vacation
+----------------------------
+
+Quite some things have accumulated to improve and fix at home. That will get
+some love and attention too.
+
+Looking forward to all of the above!