From 02d51b8ebfe57c2c3dc81f06bce79e9f5812c324 Mon Sep 17 00:00:00 2001
From: Jake Howard <git@theorangeone.net>
Date: Mon, 5 Oct 2020 20:56:06 +0100
Subject: [PATCH] Check whether images have changed

---
 src/compose.rs |  7 +++++++
 src/main.rs    | 13 +++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/compose.rs b/src/compose.rs
index f497040..6c2cb02 100644
--- a/src/compose.rs
+++ b/src/compose.rs
@@ -1,4 +1,5 @@
 use std::collections::HashSet;
+use std::fmt;
 use std::path::{Path, PathBuf};
 use std::process::Command;
 
@@ -39,3 +40,9 @@ impl ComposeProject {
         stdout.trim().split('\n').map(String::from).collect()
     }
 }
+
+impl fmt::Display for ComposeProject {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.compose_file.display())
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index b78f8c8..5038bb7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -33,7 +33,20 @@ fn get_files(files: &[String]) -> Option<Vec<PathBuf>> {
 }
 
 fn do_update(compose_project: compose::ComposeProject) {
+    info!("Processing {}...", compose_project);
+    let pre_images = compose_project.get_images();
+    if pre_images.is_empty() {
+        warn!("no running images, skipping");
+        return;
+    }
+
     compose_project.pull();
+
+    let post_images = compose_project.get_images();
+
+    if post_images == pre_images {
+        info!("No change to images");
+    }
 }
 
 fn main() {