Merge pull request #4 from icetemple/custom-meta
feat: add custom meta for vars
This commit is contained in:
commit
10b76c10fe
7 changed files with 97 additions and 10 deletions
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@ -2,4 +2,4 @@
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members = [
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"itconfig",
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"itconfig_tests"
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]
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]
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@ -24,6 +24,10 @@ config! {
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FOO: bool,
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BAR: i32 => 10,
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#[cfg(feature = "feature")]
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#[env_name = "POSTGRES_CONNECTION_STRING"]
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DATABASE_URL: String
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}
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}
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@ -48,7 +52,8 @@ cargo test
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* [x] Add namespace for variables
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* [x] Custom env name
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* [ ] Add if condition for feature variables
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* [x] Support feature config and other meta directives
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* [ ] Concat env variables to one variable
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## License
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@ -1,6 +1,6 @@
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[package]
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name = "itconfig"
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version = "0.4.0"
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version = "0.5.0"
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authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
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description = "Easy build a configs from environment variables and use it in globally."
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categories = ["config", "web-programming"]
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@ -14,7 +14,8 @@ readme = "README.md"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[badges.travis-ci]
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repository = "icetemple/itconfig-rs"
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[badges]
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travis-ci = { repository = "icetemple/itconfig-rs" }
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maintenance = { status = "actively-developed" }
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[dependencies]
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@ -21,6 +21,10 @@ config! {
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FOO: bool,
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BAR: i32 => 10,
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#[cfg(feature = "feature")]
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#[env_name = "POSTGRES_CONNECTION_STRING"]
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DATABASE_URL: String
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}
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}
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@ -39,7 +43,8 @@ fn main () {
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* [x] Add namespace for variables
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* [x] Custom env name
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* [ ] Add if condition for feature variables
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* [x] Support feature config and other meta directives
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* [ ] Concat env variables to one variable
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## License
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@ -172,6 +172,20 @@ impl From<EnvValue> for String {
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/// assert_eq!(cfg::APP::RECIPES_PER_PAGE(), 95);
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/// ```
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///
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/// Also you can add custom meta for each variable. For example feature configurations.
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///
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/// ```rust
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/// # #[macro_use] extern crate itconfig;
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/// config! {
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/// #[cfg(feature = "postgres")]
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/// DATABASE_URL: String,
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///
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/// #[cfg(not(feature = "postgres"))]
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/// DATABASE_URL: String,
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/// }
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/// # fn main() {}
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/// ```
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///
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///
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/// This module will also contain helper method:
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///
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@ -296,6 +310,7 @@ macro_rules! __itconfig_parse_variables {
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__itconfig_parse_variables! {
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current_variable = {
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unparsed_meta = [$(#$meta)*],
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meta = [],
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name = $name,
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ty = $ty,
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default = $default,
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@ -317,6 +332,7 @@ macro_rules! __itconfig_parse_variables {
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__itconfig_parse_variables! {
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current_variable = {
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unparsed_meta = [$(#$meta)*],
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meta = [],
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name = $name,
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ty = $ty,
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},
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@ -325,12 +341,14 @@ macro_rules! __itconfig_parse_variables {
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}
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};
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// Find meta with custom env name
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(
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current_variable = {
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unparsed_meta = [
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#[env_name = $env_name:expr]
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$($meta:tt)*
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$($rest:tt)*
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],
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meta = $meta:tt,
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name = $name:ident,
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$($current_variable:tt)*
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},
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@ -338,7 +356,8 @@ macro_rules! __itconfig_parse_variables {
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) => {
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__itconfig_parse_variables! {
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current_variable = {
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unparsed_meta = [$($meta)*],
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unparsed_meta = [$($rest)*],
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meta = $meta,
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name = $name,
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env_name = $env_name,
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$($current_variable)*
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@ -347,6 +366,30 @@ macro_rules! __itconfig_parse_variables {
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}
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};
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// Find stranger meta
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(
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current_variable = {
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unparsed_meta = [
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#$stranger_meta:tt
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$($rest:tt)*
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],
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meta = [$(#$meta:tt,)*],
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name = $name:ident,
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$($current_variable:tt)*
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},
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$($args:tt)*
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) => {
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__itconfig_parse_variables! {
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current_variable = {
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unparsed_meta = [$($rest)*],
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meta = [$(#$meta,)* #$stranger_meta,],
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name = $name,
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$($current_variable)*
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},
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$($args)*
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}
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};
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// Done parsing variable
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(
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current_variable = {
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@ -412,12 +455,14 @@ macro_rules! __itconfig_parse_variables {
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macro_rules! __itconfig_impl {
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(
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variables = [$({
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meta = $var_meta:tt,
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name = $var_name:ident,
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$($variable:tt)*
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},)*],
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namespaces = [$({
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variables = [$({
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name = $ns_var_name:tt,
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meta = $ns_var_meta:tt,
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name = $ns_var_name:ident,
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$($ns_variables:tt)*
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},)*],
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env_prefix = $ns_env_prefix:expr,
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@ -439,6 +484,7 @@ macro_rules! __itconfig_impl {
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use $crate::EnvValue;
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$(__itconfig_variable! {
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meta = $ns_var_meta,
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name = $ns_var_name,
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env_prefix = $ns_env_prefix,
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$($ns_variables)*
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@ -453,6 +499,7 @@ macro_rules! __itconfig_impl {
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}
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$(__itconfig_variable! {
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meta = $var_meta,
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name = $var_name,
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env_prefix = $env_prefix,
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$($variable)*
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@ -471,12 +518,14 @@ macro_rules! __itconfig_impl {
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#[doc(hidden)]
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macro_rules! __itconfig_variable {
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(
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meta = $meta:tt,
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name = $name:ident,
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env_prefix = $env_prefix:expr,
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ty = $ty:ty,
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$($args:tt)*
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) => {
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__itconfig_variable! {
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meta = $meta,
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name = $name,
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env_prefix = $env_prefix,
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env_name = concat!($env_prefix, stringify!($name)).to_uppercase(),
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@ -487,12 +536,14 @@ macro_rules! __itconfig_variable {
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// Add method without default value
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(
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meta = $meta:tt,
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name = $name:ident,
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env_prefix = $env_prefix:expr,
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env_name = $env_name:expr,
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ty = $ty:ty,
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) => {
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__itconfig_variable! {
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meta = $meta,
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name = $name,
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env_prefix = $env_prefix,
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env_name = $env_name,
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@ -503,12 +554,14 @@ macro_rules! __itconfig_variable {
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// Add method with default value
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(
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meta = [$(#$meta:tt,)*],
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name = $name:ident,
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env_prefix = $env_prefix:expr,
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env_name = $env_name:expr,
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ty = $ty:ty,
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default = $default:expr,
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) => {
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$(#$meta)*
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pub fn $name() -> $ty {
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env::var($env_name)
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.map(|val| EnvValue::from(val).into())
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@ -9,4 +9,4 @@ publish = false
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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itconfig = { path = '../itconfig' }
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itconfig = { path = '../itconfig' }
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@ -217,4 +217,27 @@ fn custom_environment_name_for_variable() {
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assert_eq!(cfg::PER_PAGE(), 95);
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assert_eq!(cfg::APP::RECIPES_PER_PAGE(), 95);
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env::remove_var("MY_CUSTOM_NAME");
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}
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#[test]
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fn stranger_meta_data() {
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env::set_var("MY_CUSTOM_NAME", "95");
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config! {
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#[cfg(feature = "postgres")]
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#[env_name = "MY_CUSTOM_NAME"]
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DATABASE_URL: String,
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#[cfg(not(feature = "postgres"))]
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#[env_name = "MY_CUSTOM_NAME"]
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DATABASE_URL: i32,
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}
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cfg::init();
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#[cfg(not(feature = "postgres"))]
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assert_eq!(cfg::DATABASE_URL(), 95);
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#[cfg(feature = "postgres")]
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assert_eq!(cfg::DATABASE_URL(), "95");
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env::remove_var("MY_CUSTOM_NAME");
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}
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