Feature flag out the external dependencies

README.md

@@ -155,12 +155,12 @@ validation functions and types.
 ## Validators
 The crate comes with some built-in validators and you can have several validators for a given field.
 
-### email
+### email (optional)
 Tests whether the String is a valid email according to the HTML5 regex, which means it will mark
 some esoteric emails as invalid that won't be valid in a `email` input as well.
 This validator doesn't take any arguments: `#[validate(email)]`.
 
-### url
+### url (optional)
 Tests whether the String is a valid URL.
 This validator doesn't take any arguments: `#[validate(url)]`;
 
@@ -244,7 +244,7 @@ Examples:
 #[validate(does_not_contain(pattern = "gmail"))]
 ```
 
-### regex
+### regex (optional)
 Tests whether the string matches the regex given. `regex` takes
 1 string argument: the path to a static Regex instance.
 
@@ -402,5 +402,10 @@ For example, the following attributes all work:
 ```
 
 ## Features
+By default, the `email`, `url` and `regex` features are enabled to provide compatibility with versions < 0.21.0.s
+
 `derive` - This allows for the use of the derive macro.
 `derive_nightly_features` - This imports both derive as well as proc-macro-error2 nightly features. This allows proc-macro-error2 to emit extra nightly warnings.
+`email` - Allows for email validation, pulls in idna and turns on `regex` feature flag.
+`url` - Allows for url validation, pulls in url optional dependency.
+`regex` - Allows for regex validation, pulling in regex optional dependency.

validator/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "validator"
-version = "0.20.0"
+version = "0.21.0"
 authors = ["Vincent Prouillet <hello@vincentprouillet.com"]
 license = "MIT"
 description = "Common validation functions (email, url, length, ...) and trait - to be used with `validator_derive`"
@@ -12,9 +12,9 @@ readme = "../README.md"
 rust-version = { workspace = true }
 
 [dependencies]
-url = "2"
-regex = { version = "1", default-features = false, features = ["std"] }
-idna = "1"
+url = { version = "2", optional = true }
+regex = { version = "1", default-features = false, features = ["std"], optional = true }
+idna = { version = "1", optional = true }
 serde = "1"
 serde_derive = "1"
 serde_json = "1"
@@ -23,6 +23,10 @@ card-validate = { version = "2.3", optional = true }
 indexmap = { version = "2.0.0", features = ["serde"], optional = true }
 
 [features]
+default = ["regex", "url", "email"]
 card = ["card-validate"]
 derive = ["validator_derive"]
 derive_nightly_features = ["derive", "validator_derive/nightly_features"]
+regex = ["dep:regex"]
+url = ["dep:url"]
+email = ["dep:idna", "regex"]

validator/src/lib.rs

@@ -69,14 +69,17 @@ mod validation;
 pub use validation::cards::ValidateCreditCard;
 pub use validation::contains::ValidateContains;
 pub use validation::does_not_contain::ValidateDoesNotContain;
+#[cfg(feature = "email")]
 pub use validation::email::ValidateEmail;
 pub use validation::ip::ValidateIp;
 pub use validation::length::ValidateLength;
 pub use validation::must_match::validate_must_match;
 pub use validation::non_control_character::ValidateNonControlCharacter;
 pub use validation::range::ValidateRange;
+#[cfg(feature = "regex")]
 pub use validation::regex::{AsRegex, ValidateRegex};
 pub use validation::required::ValidateRequired;
+#[cfg(feature = "url")]
 pub use validation::urls::ValidateUrl;
 
 pub use traits::{Validate, ValidateArgs};

validator/src/validation/mod.rs

@@ -2,13 +2,16 @@
 pub mod cards;
 pub mod contains;
 pub mod does_not_contain;
+#[cfg(feature = "email")]
 pub mod email;
 pub mod ip;
 pub mod length;
 pub mod must_match;
 // pub mod nested;
 pub mod non_control_character;
 pub mod range;
+#[cfg(feature = "regex")]
 pub mod regex;
 pub mod required;
+#[cfg(feature = "url")]
 pub mod urls;

validator_derive/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "validator_derive"
-version = "0.20.0"
+version = "0.21.0"
 authors = ["Vincent Prouillet <hello@vincentprouillet.com"]
 license = "MIT"
 description = "Macros 1.1 implementation of #[derive(Validate)]"