feat: add feature flags

ramiroaisen · May 30, 2024 · 19f045c · 19f045c
1 parent 7633653
commit 19f045c
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Showing 6 changed files with 135 additions and 16 deletions.
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/metre-macros/Cargo.toml b/metre-macros/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "metre-macros"
-version = "0.1.1"
+version = "0.2.0"
 edition = "2021"
 license = "Apache-2.0"
 description = "Macros for the metre crate"

diff --git a/metre/Cargo.toml b/metre/Cargo.toml
@@ -11,14 +11,41 @@ keywords = ["configuration", "config", "loader", "env"]
 categories = ["config", "environment-variables"]
 authors = ["Ramiro Aisen <ramiroaisen@gmail.com>"]
 
+[features]
+default = [
+  "derive",
+  "env",
+  "toml",
+  "json",
+]
+full = [
+  "derive",
+  "env",
+  "toml",
+  "yaml",
+  "json",
+  "jsonc",
+  "url_blocking",
+  "url_async"
+] 
+env = []
+derive = [ "dep:metre-macros" ]
+toml = [ "dep:toml" ]
+yaml = [ "dep:serde_yaml" ]
+json = [ "dep:serde_json" ]
+jsonc = [ "dep:json_comments", "dep:serde_json" ]
+url_blocking = ["dep:reqwest", "reqwest/blocking"]
+url_async = ["dep:reqwest"]
+reqwest-rustls-tls = ["reqwest?/rustls-tls"]
+
 
 [dependencies]
-metre-macros = { version = "0.1.1", path = "../metre-macros" }
-json_comments = "0.2.2"
-owo-colors = "4.0.0"
-reqwest = { version = "0.12.4", features = ["blocking", "rustls-tls"] }
+metre-macros = { version = "0.2.0", path = "../metre-macros", optional = true }
+json_comments = { version = "0.2.2", optional = true }
+owo-colors = { version = "4.0.0" }
+reqwest = { version = "0.12.4", features = ["blocking", "rustls-tls"], optional = true }
 serde = { version = "1.0.203", features = ["derive"] }
-serde_json = "1.0.117"
-serde_yaml = "0.9.34"
+serde_json = { version = "1.0.117", optional = true }
+serde_yaml = { version = "0.9.34", optional = true }
 thiserror = "1.0.61"
-toml = "0.8.13"
+toml = { version = "0.8.13", optional = true }
diff --git a/metre/src/error.rs b/metre/src/error.rs
@@ -4,13 +4,15 @@ use owo_colors::*;
 use std::convert::Infallible;
 use std::sync::Arc;
 
+#[allow(unused)]
 use crate::LoadLocation;
 
 /// An error that can happen anywhere in the config loading process
 #[derive(Debug, Clone, thiserror::Error)]
 pub enum Error {
   /// A network error loading a configuration from a url
   #[error("Network error loading config from {}", url.yellow())]
+  #[cfg(any(feature = "url_blocking", feature = "url_async"))]
   Network {
     url: String,
     #[source]
@@ -26,6 +28,7 @@ pub enum Error {
   },
 
   /// A JSON or JSONC error when deserialzing a partial configuration
+  #[cfg(any(feature = "json", feature = "jsonc"))]
   #[error("JSON error loading config from {}", location)]
   Json {
     #[source]
@@ -34,6 +37,7 @@ pub enum Error {
   },
 
   /// A TOML error when deserialzing a partial configuration
+  #[cfg(feature = "toml")]
   #[error("TOML error loading config from {}", location)]
   Toml {
     #[source]
@@ -43,13 +47,15 @@ pub enum Error {
 
   /// A YAML error when deserialzing a partial configuration
   #[error("YAML error loading config from {}", location)]
+  #[cfg(feature = "yaml")]
   Yaml {
     #[source]
     source: Arc<serde_yaml::Error>,
     location: LoadLocation,
   },
 
   /// An error loading a partial configuration from an environment variable
+  #[cfg(feature = "env")]
   #[error(transparent)]
   FromEnv(#[from] FromEnvError),
 
@@ -73,6 +79,7 @@ pub struct MergeError {
 }
 
 /// Error parsing a value from an environment variable
+#[cfg(feature = "env")]
 #[derive(Debug, Clone, thiserror::Error)]
 #[error("error parsing var {} from env for field: {}: {}", key.yellow(), field.yellow(), message)]
 pub struct FromEnvError {
@@ -108,9 +115,14 @@ macro_rules! impl_from_infallible {
   }
 }
 
+
 impl_from_infallible!(
   Error
   MergeError
-  FromEnvError
   FromPartialError
 );
+
+#[cfg(feature = "env")]
+impl_from_infallible!(
+  FromEnvError
+);