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