Expand rep::Version (#212)

* expand the fields of Version

Expands `shiplift::rep::Version` to contain fields for the following
elements of the `/version` API:

- `min_api_version` (`MinAPIVersion`)
- `os` (`Os`)
- `arch` (`Arch`)
- `kernel_version` (`KernelVersion`)
- `build_time` (`BuildTime`)

Adds a new example program to display version information.

* order version fields according to api docs

* remove min_api_version

For backwards compat with older engines, remove the `min_api_version`
field. It was apparently added in API version `1.25.0` (circa 2017).

2 files changed, 21 insertions, 1 deletions

diff --git a/examples/version.rs b/examples/version.rs
new file mode 100644
index 0000000..6125e56
--- /dev/null
+++ b/examples/version.rs
@@ -0,0 +1,13 @@
+use shiplift::Docker;
+use tokio::prelude::Future;
+
+fn main() {
+    env_logger::init();
+    let docker = Docker::new();
+    let fut = docker
+        .version()
+        .map(|ver| println!("version -> {:#?}", ver))
+        .map_err(|e| eprintln!("Error: {}", e));
+
+    tokio::run(fut);
+}
diff --git a/src/rep.rs b/src/rep.rs
index 7a96367..67b1028 100644
--- a/src/rep.rs
+++ b/src/rep.rs
@@ -404,10 +404,17 @@ pub struct Top {
 #[derive(Clone, Debug, Serialize, Deserialize)]
 #[serde(rename_all = "PascalCase")]
 pub struct Version {
-    pub api_version: String,
     pub version: String,
+    pub api_version: String,
     pub git_commit: String,
     pub go_version: String,
+    pub os: String,
+    pub arch: String,
+    pub kernel_version: String,
+    #[cfg(feature = "chrono")]
+    pub build_time: DateTime<Utc>,
+    #[cfg(not(feature = "chrono"))]
+    pub build_time: String,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]