pleshevskiy/itconfig
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feat: add meta for changing module name

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Dmitriy Pleshevskiy 2019-12-23 00:11:29 +03:00
parent e6b7121508
commit 97e63b686d
3 changed files with 69 additions and 15 deletions
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2
Cargo.toml
View file

@ -1,6 +1,6 @@
[package] [package]
name = "itconfig" name = "itconfig"
version = "0.1.1" version = "0.2.0"
authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"] authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
description = "Easy build a configs from environment variables and use it in globally." description = "Easy build a configs from environment variables and use it in globally."
categories = ["config", "web-programming"] categories = ["config", "web-programming"]

70
src/lib.rs
View file

@ -131,16 +131,16 @@ impl From<EnvValue> for String {
#[macro_export] #[macro_export]
macro_rules! config { macro_rules! config {
($($tokens:tt)*) => { ($($tokens:tt)*) => {
__config_parse_variables!( __itconfig_parse_module! {
tokens = [$($tokens)*], tokens = [$($tokens)*],
variables = [], name = cfg,
); }
} }
} }
#[macro_export] #[macro_export]
#[doc(hidden)] #[doc(hidden)]
macro_rules! __invalid_config_syntax { macro_rules! __itconfig_invalid_syntax {
() => { () => {
compile_error!( compile_error!(
"Invalid `config!` syntax. Please see the `config!` macro docs for more info." "Invalid `config!` syntax. Please see the `config!` macro docs for more info."
@ -148,11 +148,48 @@ macro_rules! __invalid_config_syntax {
}; };
} }
#[macro_export]
#[doc(hidden)]
macro_rules! __itconfig_parse_module {
// Find module name
(
tokens = [
#![mod_name = $mod_name:ident];
$($rest:tt)*
],
name = $ignore:tt,
) => {
__itconfig_parse_module! {
tokens = [$($rest)*],
name = $mod_name,
}
};
// Done parsing module
(
tokens = $tokens:tt,
name = $name:tt,
) => {
__itconfig_parse_variables! {
tokens = $tokens,
variables = [],
module = {
name = $name,
},
}
};
// Invalid syntax
($($tokens:tt)*) => {
__itconfig_invalid_syntax!();
};
}
#[macro_export] #[macro_export]
#[doc(hidden)] #[doc(hidden)]
macro_rules! __config_parse_variables { macro_rules! __itconfig_parse_variables {
// Find general config of variable // Find variable with default value
( (
tokens = [ tokens = [
$name:ident : $ty:ty => $default:expr, $name:ident : $ty:ty => $default:expr,
@ -160,7 +197,7 @@ macro_rules! __config_parse_variables {
], ],
$($args:tt)* $($args:tt)*
) => { ) => {
__config_parse_variables!( __itconfig_parse_variables! {
current_variable = { current_variable = {
name = $name, name = $name,
ty = $ty, ty = $ty,
@ -169,9 +206,10 @@ macro_rules! __config_parse_variables {
}, },
tokens = [$($rest)*], tokens = [$($rest)*],
$($args)* $($args)*
); }
}; };
// Find variable without default value
( (
tokens = [ tokens = [
$name:ident : $ty:ty, $name:ident : $ty:ty,
@ -179,7 +217,7 @@ macro_rules! __config_parse_variables {
], ],
$($args:tt)* $($args:tt)*
) => { ) => {
__config_parse_variables!( __itconfig_parse_variables! {
current_variable = { current_variable = {
name = $name, name = $name,
ty = $ty, ty = $ty,
@ -187,7 +225,7 @@ macro_rules! __config_parse_variables {
}, },
tokens = [$($rest)*], tokens = [$($rest)*],
$($args)* $($args)*
); }
}; };
// Done parsing variable // Done parsing variable
@ -199,10 +237,11 @@ macro_rules! __config_parse_variables {
variables = [$($variables:tt,)*], variables = [$($variables:tt,)*],
$($args:tt)* $($args:tt)*
) => { ) => {
__config_parse_variables!( __itconfig_parse_variables! {
tokens = $tokens, tokens = $tokens,
variables = [$($variables,)* { $($current_variable)* },], variables = [$($variables,)* { $($current_variable)* },],
); $($args)*
}
}; };
// Done parsing all variables // Done parsing all variables
@ -215,7 +254,7 @@ macro_rules! __config_parse_variables {
// Invalid syntax // Invalid syntax
($($tokens:tt)*) => { ($($tokens:tt)*) => {
__invalid_config_syntax!(); __itconfig_invalid_syntax!();
}; };
} }
@ -228,8 +267,11 @@ macro_rules! __config_impl {
name = $name:ident, name = $name:ident,
$($variable:tt)* $($variable:tt)*
},)+], },)+],
module = {
name = $mod_name:ident,
},
) => { ) => {
pub mod cfg { pub mod $mod_name {
#![allow(non_snake_case)] #![allow(non_snake_case)]
use std::env; use std::env;
use $crate::EnvValue; use $crate::EnvValue;

12
tests/config_macro.rs
View file

@ -109,3 +109,15 @@ fn convert_number_value_from_env() {
assert_eq!(cfg::F32(), 10.0); assert_eq!(cfg::F32(), 10.0);
assert_eq!(cfg::F64(), 10.0); assert_eq!(cfg::F64(), 10.0);
} }
#[test]
fn change_config_module_name() {
config! {
#![mod_name = custom_config_name];
DEBUG: bool => true,
}
assert_eq!(custom_config_name::DEBUG(), true);
}