From 1e333dfb337bb0f6ca662f2ecf1ca012ce9c18ee Mon Sep 17 00:00:00 2001
From: Cole Helbling <cole.e.helbling@outlook.com>
Date: Tue, 31 Mar 2020 14:54:45 -0700
Subject: [PATCH] Show commit hash in version number

---
 CHANGELOG.md |  4 ++++
 build.rs     | 14 ++++++++++++++
 src/main.rs  |  2 +-
 3 files changed, 19 insertions(+), 1 deletion(-)
 create mode 100644 build.rs

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d37ff7..5cf95e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Version output displays `git` revision information.
+
 ## [0.3.0] - 2020-03-30
 
 ### Added
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..b9ae403
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,14 @@
+fn main() {
+    let git_describe = std::process::Command::new("git")
+        .args(&["describe", "--tags", "--broken"])
+        .output()
+        .ok()
+        .and_then(|proc| String::from_utf8(proc.stdout).ok());
+
+    let version_info = match git_describe {
+        Some(description) if !description.is_empty() => description,
+        _ => format!("v{}-unknown", env!("CARGO_PKG_VERSION")),
+    };
+
+    println!("cargo:rustc-env=ZOXIDE_VERSION={}", version_info);
+}
diff --git a/src/main.rs b/src/main.rs
index a480b45..012f85c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,7 +8,7 @@ use anyhow::Result;
 use structopt::StructOpt;
 
 #[derive(Debug, StructOpt)]
-#[structopt(about = "A cd command that learns your habits")]
+#[structopt(about = "A cd command that learns your habits", version = env!("ZOXIDE_VERSION"))]
 enum Zoxide {
     Add(subcommand::Add),
     Import(subcommand::Import),