fix progress line overwrite moonc diagnostic

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "n2"
-version = "0.1.4"
+version = "0.1.5"
 categories = ["development-tools", "development-tools::build-utils"]
 edition = "2018"
 exclude = [".github/*", ".vscode/*"]

src/progress.rs

@@ -275,6 +275,9 @@ impl FancyState {
     fn task_finished(&mut self, id: BuildId, build: &Build, result: &TaskResult) {
         self.tasks
             .remove(self.tasks.iter().position(|t| t.id == id).unwrap());
+
+        self.clear_progress();
+
         match result.termination {
             Termination::Success => {
                 // Common case: don't show anything.
@@ -298,6 +301,8 @@ impl FancyState {
                 std::io::stdout().write_all(&result.output).unwrap();
             }
         }
+
+        // mark as dirty to trigger progress update
         self.dirty();
     }
 

tests/e2e/regen.rs

@@ -128,7 +128,8 @@ fn restat() -> anyhow::Result<()> {
     let out = space.run_expect(&mut n2_command(vec!["build.ninja"]))?;
     assert_output_not_contains(&out, "touch build.ninja");
 
-    // But modifying the input should cause it to be up to date.
+    std::thread::sleep(std::time::Duration::from_millis(100));
+
     space.write("in", "")?;
     let out = space.run_expect(&mut n2_command(vec!["build.ninja"]))?;
     assert_output_contains(&out, "touch build.ninja");