Make git-testament optional and disable it by default

This allows compiling rcc on alpine, which doesn't support proc-macros.
git-testament is mostly useful for debug builds anyways.

Cargo.toml

@@ -52,7 +52,7 @@ proptest-derive = "0.1"
 [features]
 default = ["cc", "codegen", "color-backtrace"]
 # The `swcc` binary
-cc = ["ansi_term", "git-testament", "tempfile", "pico-args", "codegen", "atty"]
+cc = ["ansi_term", "tempfile", "pico-args", "codegen", "atty"]
 codegen = ["cranelift", "cranelift-module", "cranelift-object"]
 jit = ["codegen", "cranelift-simplejit"]
 salty = ["rand", "rodio"]

src/main.rs

@@ -8,7 +8,6 @@ use std::rc::Rc;
 use std::sync::atomic::{AtomicUsize, Ordering};
 
 use ansi_term::{ANSIString, Colour};
-use git_testament::git_testament_macros;
 use pico_args::Arguments;
 use saltwater::{
     assemble, compile,
@@ -21,8 +20,6 @@ use tempfile::NamedTempFile;
 static ERRORS: AtomicUsize = AtomicUsize::new(0);
 static WARNINGS: AtomicUsize = AtomicUsize::new(0);
 
-git_testament_macros!(version);
-
 const HELP: &str = concat!(
     env!("CARGO_PKG_NAME"), " ", env!("CARGO_PKG_VERSION"), "\n",
     "Joshua Nelson <jyn514@gmail.com>\n",
@@ -286,6 +283,10 @@ macro_rules! type_sizes {
         $(println!("{}: {}", stringify!($type), std::mem::size_of::<$type>());)*
     };
 }
+
+#[cfg(feature = "git-testament")]
+git_testament::git_testament_macros!(version);
+
 fn parse_args() -> Result<(BinOpt, PathBuf), pico_args::Error> {
     use std::collections::HashMap;
 
@@ -298,7 +299,10 @@ fn parse_args() -> Result<(BinOpt, PathBuf), pico_args::Error> {
         std::process::exit(1);
     }
     if input.contains(["-V", "--version"]) {
+        #[cfg(feature = "git-testament")]
         println!("{} {}", env!("CARGO_PKG_NAME"), version_testament!());
+        #[cfg(not(feature = "git-testament"))]
+        println!("{} {}", env!("CARGO_PKG_NAME"), env!("CARGO_PKG_VERSION"));
         std::process::exit(0);
     }
     if input.contains("--print-type-sizes") {