Awesome
Universal Configuration Grammar.
This is an experiment in configuration management. The approach is not to create a "parsable" config file format. We have plenty of those. Instead we try to specify a grammar for describing configuration values that can then target various configuration formats to output to.
In theory this could support anything from command line flags to json to yaml or toml or even xml.
The goal is to allow a global shared configuration repository that can be version controlled, enforce some typesafety, and output configuration for any application regardless of that applications preferred format.
The Usual Warnings
This is still very much an experiment and the language and api can be expected to change and mutate. You have been warned.
Usage
You can get ucg with cargo cargo install ucg.
Running ucg help will show the following output.
Universal Configuration Grammar compiler.
USAGE:
ucg [FLAGS] [SUBCOMMAND]
FLAGS:
-h, --help Prints help information
--no-strict Turn off strict checking.
-V, --version Prints version information
SUBCOMMANDS:
build Build a list of ucg files.
converters list the available converters
env Describe the environment variables ucg uses.
eval Evaluate an expression with an optional ucg file as context.
fmt Format ucg files automatically.
help Prints this message or the help of the given subcommand(s)
importers list the available importers for includes
repl Start the ucg repl for interactive evaluation.
test Check a list of ucg files for errors and run test assertions.
Compiling
Build a list of ucg files.
USAGE:
ucg build [FLAGS] -r [INPUT]...
FLAGS:
-h, --help Prints help information
-r Whether we should recurse in directories or not.
-V, --version Prints version information
ARGS:
<INPUT>... Input ucg files or directories to build. If not provided then build the contents of the current directory.
Run the repl
$> ucg repl
ucg> 1 + 1;
2
ucg> {foo = 1 + 1};
{
foo = 2,
}
ucg>
Testing
Check a list of ucg files for errors and run test assertions.
USAGE:
ucg test [FLAGS] -r [INPUT]...
FLAGS:
-h, --help Prints help information
-r Whether we should recurse or not.
-V, --version Prints version information
ARGS:
<INPUT>... Input ucg files or directories to run test assertions for. If not provided it will scan the current directory for files with _test.ucg