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units-converter

A small LunarUnits-powered unit conversion CLI.

moonbit
units
converter
cli
moon add FrozenLemonTee/units-converter@0.1.0
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Version
0.1.0
License
Apache-2.0
Repository
Last updated
last month
Downloads
83

Dependencies

README

#units-converter

English | 简体中文

units-converter is a small MoonBit CLI powered by FrozenLemonTee/LunarUnits. It converts unit-bearing quantity expressions with the uc command.

#Usage

During development, run the command through moon:

moon run cmd/main -- "9.8 m/s^2" "ft/s^2"
moon run cmd/main -- "60 km/h" "m/s"
moon run cmd/main -- "1 kWh" "J"
moon run cmd/main -- "3 m" "s"

Subcommands:

moon run cmd/main -- parse "9.8 m/s^2"
moon run cmd/main -- parse-unit "kg*m/s^2"
moon run cmd/main -- inspect N

Output format:

moon run cmd/main -- --format si "9.8 m/s^2" "ft/s^2"
moon run cmd/main -- --format latex "9.8 m/s^2" "ft/s^2"

Help:

moon run cmd/main -- --help
moon run cmd/main -- parse --help

#Why LunarUnits

This CLI does not maintain its own unit table or conversion rules. It delegates to LunarUnits for:

  • parsing quantity and unit expressions;
  • resolving symbols through the preset catalog;
  • checking dimensional compatibility before conversion;
  • formatting quantities and units.

That means invalid conversions such as 3 m to s are rejected by the same dimension model used by LunarUnits itself.

#Development

moon test
moon info
moon fmt

#
CliResult

source
pub(all) enum CliResult {
  Ok(String)
  Err(String)
} derive(Eq, 
Debug)

Result of a CLI command after argument parsing.
impl Show for CliResult

#
parse_format_style

source
fn parse_format_style(style : String) -> 
FormatStyle?

Returns the unit formatter style selected by CLI text.

#
run_convert

source
fn run_convert(quantity_text : String, target_unit_text : String, format? : String) -> CliResult

Converts a parsed quantity expression to a target unit expression.

#
run_inspect

source
fn run_inspect(symbol : String, format? : String) -> CliResult

Looks up one unit symbol through the preset catalog.

#
run_parse

source
fn run_parse(input : String, format? : String) -> CliResult

Parses a quantity expression and renders its normalized quantity.

#
run_parse_unit

source
fn run_parse_unit(input : String, format? : String) -> CliResult

Parses a unit expression and renders its normalized unit.

Source Files

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