Remove no-std-compat dependency

Cargo.toml

@@ -15,7 +15,6 @@ include = ["src", "tests", "test-template"]
 members = ["git-testament-derive"]
 
 [dependencies]
-no-std-compat = { version = "0.4" }
 git-testament-derive = { version = "0.1.14", path = "git-testament-derive" }
 
 [dev-dependencies]
@@ -25,5 +24,5 @@ regex = "1"
 lazy_static = "1"
 
 [features]
-alloc = ["no-std-compat/alloc"]
+alloc = []
 default = ["alloc"]

src/lib.rs

@@ -23,11 +23,12 @@
 //! rather than being quite noisy about how the crate version and the tag
 //! version do not match up.
 #![no_std]
-extern crate no_std_compat as std;
-use std::prelude::v1::*;
+
+#[cfg(feature = "alloc")]
+extern crate alloc;
 
 pub use git_testament_derive::{git_testament, git_testament_macros};
-use std::fmt::{self, Display, Formatter};
+use core::fmt::{self, Display, Formatter};
 
 /// A modification to a working tree, recorded when the testament was created.
 #[derive(Debug)]
@@ -116,7 +117,7 @@ impl<'a> GitTestament<'a> {
         &self,
         pkg_version: &str,
         trusted_branch: Option<&'static str>,
-    ) -> String {
+    ) -> alloc::string::String {
         match self.commit {
             CommitKind::FromTag(tag, hash, date, _) => {
                 let trusted = match trusted_branch {
@@ -132,20 +133,20 @@ impl<'a> GitTestament<'a> {
                 if trusted {
                     // We trust our branch, so construct an equivalent
                     // testament to render
-                    format!(
+                    alloc::format!(
                         "{}",
                         GitTestament {
                             commit: CommitKind::FromTag(pkg_version, hash, date, 0),
                             ..*self
                         }
                     )
                 } else if tag.contains(pkg_version) {
-                    format!("{self}")
+                    alloc::format!("{self}")
                 } else {
-                    format!("{pkg_version} :: {self}")
+                    alloc::format!("{pkg_version} :: {self}")
                 }
             }
-            _ => format!("{self}"),
+            _ => alloc::format!("{self}"),
         }
     }
 }