Ely Office: six offline-first desktop apps in Rust and GPUI

ElyDoc, ElyTable, ElyShow (LibreOfficeKit), ElyPDF (MuPDF), ElyTree (Git),
ElyMark (Milkdown and CodeMirror in CEF). ElyMail and ElyAgent follow.

crates/ely-platform/tests/logging.rs

@@ -0,0 +1,20 @@
+use ely_platform::{AppId, logging};
+
+#[test]
+fn log_lines_reach_the_app_file_and_a_second_init_fails() {
+    let dir = tempfile::tempdir().unwrap();
+
+    logging::init_in(AppId::Doc, dir.path()).unwrap();
+    log::info!("hello from the test");
+    log::logger().flush();
+
+    let text = std::fs::read_to_string(dir.path().join("ely.log")).unwrap();
+    assert!(text.contains("ElyDoc 0.1.0 started"), "{text}");
+    assert!(text.contains("hello from the test"), "{text}");
+
+    let error = logging::init_in(AppId::Mail, dir.path()).unwrap_err();
+    assert!(
+        format!("{error:#}").contains("a logger is already set"),
+        "{error:#}"
+    );
+}