squash! fixup! Show commit hash in version when built from source

If the release is tagged, we don't want to show the commit hash when
running `zoxide -V`.

build.rs

@@ -1,14 +1,35 @@
+use std::process::Command;
+
 fn main() {
-    let mut hash = std::process::Command::new("git")
-        .args(&["rev-parse", "--short", "HEAD"])
-        .output()
+    let status_code = Command::new("git")
+        .args(&["describe", "--tags", "--exact-match", "--dirty"])
+        .status()
         .ok()
-        .and_then(|proc| String::from_utf8(proc.stdout).ok())
-        .unwrap_or_default();
+        .and_then(|status| status.code());
 
-    if !hash.is_empty() {
-        hash = format!("-{}", hash);
-    }
+    let is_tagged = match status_code {
+        Some(code) => code == 0,
+        None => false,
+    };
 
-    println!("cargo:rustc-env=GIT_HASH={}", hash);
+    // If this is a tagged commit (a release), we don't want to include the
+    // commit hash in the version output.
+    let revision = if is_tagged {
+        String::new()
+    } else {
+        let mut hash = Command::new("git")
+            .args(&["rev-parse", "--short", "HEAD"])
+            .output()
+            .ok()
+            .and_then(|proc| String::from_utf8(proc.stdout).ok())
+            .unwrap_or_default();
+
+        if !hash.is_empty() {
+            hash = format!("-{}", hash);
+        }
+
+        hash
+    };
+
+    println!("cargo:rustc-env=GIT_HASH={}", revision);
 }