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funkpower
d115616eff
Python was never the house language here: the mw-* desktop surface it came
from is 39 bash scripts and was exactly one Python script, the one this was
extracted from. What it cost was distribution, a widget dependency that
needed pipx and a Python floor, and 24ms of interpreter startup before a line
of the program ran.
The port is verified rather than asserted. Both implementations were run over
199,446 day-records, 26 jurisdictions across 21 years, with every field of
every record required to match; the JSON, the iCalendar and 480 renderings of
the text output are identical too. examples/dump.rs is the harness.
What the type system actually buys, which is less than the usual claim and
more than nothing:
- Level is an ordered enum, strictest first, so reads as 'a is
stricter' and relaxed_to() is the one place a feast can lift a fast. No
rule can get the direction backwards.
- Date is a newtype over the Julian Day Number and JulianDate is a separate
type, so a civil date and an ecclesiastical one cannot be mixed up. That
confusion is the single most common way calendar code goes wrong.
- Octets is a newtype in the iCalendar folder, because the bug it replaced
counted characters against a limit RFC 5545 states in octets.
- Movables is a struct, not a map, so a mistyped key is a compile error
rather than a None at the far end of the program.
Of the six defects an adversarial review found in the Python, exactly one had
a shape a type system would have caught. The rest were logic, and the tests
came with them.
The menologion is compiled in with include_str!, so the binary answers on its
own: 930KB, no runtime, 1.2ms to start against Python's 36ms.
31 lines
721 B
TOML
31 lines
721 B
TOML
[package]
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name = "typikon"
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version = "0.2.0"
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edition = "2021"
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rust-version = "1.74"
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description = "The Orthodox liturgical day: feasts, seasons and the fast, computed rather than fetched"
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license = "GPL-2.0-only"
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repository = "https://git.pumpin.online/funkpower/typikon"
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readme = "README.md"
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keywords = ["orthodox", "liturgical", "calendar", "byzantine", "pascha"]
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categories = ["command-line-utilities", "date-and-time"]
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[dependencies]
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serde = { version = "1", features = ["derive"] }
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serde_json = "1"
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clap = { version = "4", features = ["derive"] }
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[profile.release]
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strip = true
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lto = true
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codegen-units = 1
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panic = "abort"
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[[bin]]
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name = "typikon"
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path = "src/main.rs"
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[lib]
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name = "typikon"
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path = "src/lib.rs"
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