add version and author data to command line options0.1.0

2 files changed, 33 insertions, 1 deletions

diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..ee9d9e3
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,29 @@
+fn main() {
+    println!("cargo:rustc-env=FANCY_PROMPT_BUILD_GIT_REV={}", git_describe())
+}
+
+fn git_describe() -> String {
+    let output = std::process::Command::new("git")
+        .args(&["describe", "--tags"])
+        .output();
+    output.and_then(|output| {
+        if output.status.success() {
+            Ok(
+                String::from_utf8_lossy(&output.stdout)
+                    .trim()
+                    .to_string()
+            )
+        }
+        else {
+            Err(
+                std::io::Error::new(
+                    std::io::ErrorKind::Other,
+                    "failed to run git"
+                )
+            )
+        }
+    }).unwrap_or_else(|_err| {
+        // String::from(format!("{}", _err))
+        String::from("???")
+    })
+}
diff --git a/src/main.rs b/src/main.rs
index 2f9063e..3e5f849 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 extern crate chrono;
+#[macro_use]
 extern crate clap;
 extern crate git2;
 extern crate hostname;
@@ -22,7 +23,9 @@ fn collect_data() -> prompt::PromptData {
 
     let matches = clap::App::new("fancy-prompt")
         .about("Prints a fancy prompt")
-        // XXX author, version (extract from cargo)
+        .author(crate_authors!())
+        .version(crate_version!())
+        .long_version(option_env!("FANCY_PROMPT_BUILD_GIT_REV").unwrap())
         .arg(clap::Arg::with_name("prompt-escape")
              .long("prompt-escape")
              .value_name("SHELL")