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feat: add custom separator attribute

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This commit is contained in:
Dmitriy Pleshevskiy 2021-04-22 11:41:46 +03:00
parent 5d6b335a7a
commit 70b670b07c
8 changed files with 78 additions and 41 deletions
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2
itconfig-macro/src/ast.rs
View file

@ -1,3 +1,4 @@
use crate::utils::SupportedBox;
use proc_macro2::TokenStream as TokenStream2;
use syn::{Attribute, Expr, Ident, Type};
@ -24,4 +25,5 @@ pub struct Variable {
pub concat_parts: Option<Vec<TokenStream2>>,
pub env_name: Option<String>,
pub meta: Vec<Attribute>,
pub supported_box: Option<SupportedBox>,
}

18
itconfig-macro/src/expand.rs
View file

@ -1,5 +1,5 @@
use crate::ast::*;
use crate::utils::{maybe_supported_box, vec_to_token_stream_2, SupportedBox};
use crate::utils::{vec_to_token_stream_2, SupportedBox};
use proc_macro2::TokenStream as TokenStream2;
use quote::{quote, ToTokens, TokenStreamExt};
@ -128,8 +128,6 @@ impl ToTokens for Variable {
.unwrap_or_else(|| name.to_string().to_uppercase());
let meta = vec_to_token_stream_2(&self.meta);
let supported_box = maybe_supported_box(&ty);
let get_variable: TokenStream2 = if self.concat_parts.is_some() {
let concat_parts = self.concat_parts.as_ref().unwrap();
quote! {{
@ -139,19 +137,21 @@ impl ToTokens for Variable {
value
}}
} else if let Some(initial) = &self.initial {
match supported_box {
Some(SupportedBox::Vec) => {
quote!(::itconfig::get_vec_env_or_set_default(#env_name, ",", #initial))
match self.supported_box.clone() {
Some(SupportedBox::Vec { sep }) => {
let sep = &sep.unwrap_or_else(|| String::from(","));
quote!(::itconfig::get_vec_env_or_set_default(#env_name, #sep, #initial))
}
_ => quote!(::itconfig::get_env_or_set_default(#env_name, #initial)),
}
} else {
match supported_box {
match self.supported_box.clone() {
Some(SupportedBox::Option) => {
quote!(::itconfig::maybe_get_env(#env_name))
}
Some(SupportedBox::Vec) => {
quote!(::itconfig::get_vec_env_or_panic(#env_name, ","))
Some(SupportedBox::Vec { sep }) => {
let sep = &sep.unwrap_or_else(|| String::from(","));
quote!(::itconfig::get_vec_env_or_panic(#env_name, #sep))
}
_ => {
quote!(::itconfig::get_env_or_panic(#env_name))

12
itconfig-macro/src/parse.rs
View file

@ -1,4 +1,5 @@
use crate::ast::*;
use crate::utils::{maybe_supported_box, SupportedBox};
use proc_macro2::{Ident, Span, TokenStream as TokenStream2};
use quote::quote;
use syn::ext::IdentExt;
@ -73,7 +74,13 @@ fn parse_namespace_content(
if attr.path.is_ident("env_name") {
variable.env_name = parse_attribute(attr, "env_name", &variable.env_name)?;
} else {
variable.meta.push(attr);
match variable.supported_box {
Some(SupportedBox::Vec { sep: current_sep }) if attr.path.is_ident("sep") => {
let sep = parse_attribute(attr, "sep", &current_sep)?;
variable.supported_box = Some(SupportedBox::Vec { sep });
}
_ => variable.meta.push(attr),
}
}
}
@ -220,6 +227,8 @@ impl Parse for Variable {
parse_str("&'static str")?
};
let supported_box = maybe_supported_box(&ty);
if is_concat {
input.parse::<Lt>()?;
@ -263,6 +272,7 @@ impl Parse for Variable {
input.parse::<Comma>().ok();
Ok(Variable {
supported_box,
is_static,
name,
ty,

6
itconfig-macro/src/utils.rs
View file

@ -5,9 +5,9 @@ use syn::{Path, Type};
const OPTION_PATH_IDENTS: &[&str] = &["Option|", "std|option|Option|", "core|option|Option|"];
const VEC_PATH_IDENTS: &[&str] = &["Vec|", "std|vec|Vec|"];
#[derive(Debug)]
#[derive(Debug, Clone)]
pub enum SupportedBox {
Vec,
Vec { sep: Option<String> },
Option,
}
@ -44,7 +44,7 @@ pub fn maybe_supported_box(ty: &Type) -> Option<SupportedBox> {
if is_option_path_ident(&path_ident) {
Some(SupportedBox::Option)
} else if is_vec_path_ident(&path_ident) {
Some(SupportedBox::Vec)
Some(SupportedBox::Vec { sep: None })
} else {
None
}

2
itconfig-tests/Cargo.toml
View file

@ -1,6 +1,6 @@
[package]
name = "itconfig_tests"
version = "0.1.1"
version = "0.1.0"
authors = ["Dmitriy Pleshevskiy <dmitriy@ideascup.me>"]
edition = "2018"
license = "MIT"

25
itconfig-tests/tests/config_macro.rs
View file

@ -506,6 +506,7 @@ mod test_case_22 {
"static ",
STATIC_CONCAT_PART => "part",
),
static STATIC_VEC: Vec<u32> => vec![1],
}
#[test]
@ -528,7 +529,8 @@ mod test_case_22 {
assert_eq!(config::STATIC_USIZE(), 1);
assert_eq!(config::STATIC_F32(), 1.0);
assert_eq!(config::STATIC_F64(), 1.0);
assert_eq!(config::STATIC_CONCAT_VARIABLE(), "static part".to_string())
assert_eq!(config::STATIC_CONCAT_VARIABLE(), "static part".to_string());
assert_eq!(config::STATIC_VEC(), vec![1]);
}
}
@ -573,3 +575,24 @@ mod test_case_24 {
assert_eq!(config::STD_VEC(), vec!["paypal", "stripe"]);
}
}
mod test_case_25 {
use std::env;
itconfig::config! {
#[sep = ";"]
CUSTOM_SEP_MY_VEC: Vec<&'static str>,
#[env_name = "CUSTOM_SEP_MY_VEC"]
#[sep = ";"]
CUSTOM_SEP_STD_VEC: std::vec::Vec<&'static str>,
}
#[test]
fn custom_separator_for_vector() {
env::set_var("CUSTOM_SEP_MY_VEC", "paypal;stripe");
assert_eq!(config::CUSTOM_SEP_MY_VEC(), vec!["paypal", "stripe"]);
assert_eq!(config::CUSTOM_SEP_STD_VEC(), vec!["paypal", "stripe"]);
}
}

32
itconfig/src/get_vec_env.rs
View file

@ -86,7 +86,7 @@ where
/// }
/// ```
///
pub fn get_vec_env<T>(env_name: &str, sep: &'static str) -> Result<Vec<T>, EnvError>
pub fn get_vec_env<T>(env_name: &str, sep: &str) -> Result<Vec<T>, EnvError>
where
T: FromEnvString,
{
@ -116,15 +116,12 @@ where
/// }
/// ```
///
pub fn get_vec_env_or_default<T, D>(env_name: &str, sep: &'static str, default: Vec<D>) -> Vec<T>
pub fn get_vec_env_or_default<T, D>(env_name: &str, sep: &str, default: Vec<D>) -> Vec<T>
where
T: FromEnvString,
D: ToEnvString,
{
get_vec_env_or(env_name, sep, |_| {
Ok(default.into_iter().map(EnvString::from).collect())
})
.unwrap_or_else(make_panic)
get_vec_env_or(env_name, sep, |_| Ok(vec_to_env_strings(default))).unwrap_or_else(make_panic)
}
/// This function is similar as `get_vec_env_or_default`, but the default value will be set to environment
@ -151,29 +148,14 @@ where
/// }
/// ```
///
pub fn get_vec_env_or_set_default<T, D>(
env_name: &str,
sep: &'static str,
default: Vec<D>,
) -> Vec<T>
pub fn get_vec_env_or_set_default<T, D>(env_name: &str, sep: &str, default: Vec<D>) -> Vec<T>
where
T: FromEnvString,
D: ToEnvString,
{
get_vec_env_or(env_name, sep, |_| {
let default_env_strings: Vec<EnvString> =
default.into_iter().map(EnvString::from).collect();
let env_val =
default_env_strings
.iter()
.enumerate()
.fold(String::new(), |mut res, (i, item)| {
if i > 0 {
res.push_str(sep);
}
res.push_str(&item);
res
});
let default_env_strings = vec_to_env_strings(default);
let env_val = join(&default_env_strings, sep);
env::set_var(env_name, env_val.as_str());
Ok(default_env_strings)
})
@ -182,7 +164,7 @@ where
/// This function returns env variable as `EnvString` structure. You can pass callback for custom
/// default expression. Callback should return `EnvString` value or `EnvError`
pub fn get_vec_env_or<T, F>(env_name: &str, sep: &'static str, cb: F) -> Result<Vec<T>, EnvError>
pub fn get_vec_env_or<T, F>(env_name: &str, sep: &str, cb: F) -> Result<Vec<T>, EnvError>
where
T: FromEnvString,
F: FnOnce(env::VarError) -> Result<Vec<EnvString>, EnvError>,

22
itconfig/src/utils.rs
View file

@ -1,4 +1,4 @@
use crate::{EnvError, EnvString, FromEnvString};
use crate::{EnvError, EnvString, FromEnvString, ToEnvString};
pub(crate) fn parse_env_variable<T>(env_name: &str, env_str: EnvString) -> Result<T, EnvError>
where
@ -11,3 +11,23 @@ where
pub(crate) fn make_panic<T>(e: EnvError) -> T {
panic!("{}", e)
}
pub(crate) fn join(env_strings: &[EnvString], sep: &str) -> String {
env_strings
.iter()
.enumerate()
.fold(String::new(), |mut res, (i, item)| {
if i > 0 {
res.push_str(sep);
}
res.push_str(&item);
res
})
}
pub(crate) fn vec_to_env_strings<T>(values: Vec<T>) -> Vec<EnvString>
where
T: ToEnvString,
{
values.into_iter().map(EnvString::from).collect()
}