Make serde optional

Cargo.toml

@@ -4,8 +4,10 @@ version = "0.1.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[features]
+serde = ["dep:serde"]
 
 [dependencies]
 chrono = { version = "0.4", features = ["serde"] }
 epoch = { git = "https://git.hitchhiker-linux.org/jeang3nie/epoch-rs.git", features = ["serde"] }
-serde = { version = "1.0", features = ["derive"] }
+serde = { version = "1.0", features = ["derive"], optional = true }

src/arch.rs

@@ -1,10 +1,13 @@
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+
 use {
     crate::error::Error,
-    serde::{Deserialize, Serialize},
     std::{fmt, str},
 };
 
-#[derive(Clone, Copy, Debug, Deserialize, Serialize, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 /// Represents the processor architecture the software is compiled for
 pub enum Arch {
     Any,

src/prerelease.rs

@@ -1,11 +1,14 @@
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+
 use {
     crate::{error::Error, MAX_U12},
     epoch::DateTime,
-    serde::{Deserialize, Serialize},
     std::{cmp, convert::Into, fmt, num::NonZeroU16, str},
 };
 
-#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 /// A specification for non-production releases
 pub enum PreRelease {
     Alpha(Option<NonZeroU16>),

src/version.rs

@@ -1,10 +1,13 @@
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+
 use {
     crate::{arch::Arch, error::Error, prerelease::PreRelease, MAX_U12},
-    serde::{Deserialize, Serialize},
     std::{cmp, fmt, str},
 };
 
-#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 pub enum Kind {
     Simple {
         major: u16,
@@ -26,7 +29,8 @@ pub enum Kind {
     },
 }
 
-#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 pub struct Version {
     pub kind: Kind,
     pub pre: PreRelease,