From 38c8bc8cf297640a27a39eb1501af871f04f234c Mon Sep 17 00:00:00 2001
From: Jiahao XU <Jiahao_XU@outlook.com>
Date: Tue, 12 Jul 2022 16:47:44 +1000
Subject: [PATCH] Impl new type `helpes::CrateName`

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>
---
 src/helpers.rs            |  3 +++
 src/helpers/crate_name.rs | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 src/helpers/crate_name.rs

diff --git a/src/helpers.rs b/src/helpers.rs
index b7614e2f..254119b8 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -34,6 +34,9 @@ pub use path_ext::*;
 mod tls_version;
 pub use tls_version::TLSVersion;
 
+mod crate_name;
+pub use crate_name::CrateName;
+
 /// Load binstall metadata from the crate `Cargo.toml` at the provided path
 pub fn load_manifest_path<P: AsRef<Path>>(
     manifest_path: P,
diff --git a/src/helpers/crate_name.rs b/src/helpers/crate_name.rs
new file mode 100644
index 00000000..b7eb1077
--- /dev/null
+++ b/src/helpers/crate_name.rs
@@ -0,0 +1,39 @@
+use std::convert::Infallible;
+use std::fmt;
+use std::str::FromStr;
+
+#[derive(Debug)]
+pub struct CrateName {
+    pub name: String,
+    pub version: Option<String>,
+}
+
+impl fmt::Display for CrateName {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.name)?;
+
+        if let Some(version) = &self.version {
+            write!(f, "@{version}")?;
+        }
+
+        Ok(())
+    }
+}
+
+impl FromStr for CrateName {
+    type Err = Infallible;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(if let Some((name, version)) = s.split_once('@') {
+            CrateName {
+                name: name.to_string(),
+                version: Some(version.to_string()),
+            }
+        } else {
+            CrateName {
+                name: s.to_string(),
+                version: None,
+            }
+        })
+    }
+}