If no command is given show help text; and instructions on sub-help. Include a dev quick start in the README

DEV-README.md

@@ -1,3 +1,13 @@
+### Quick Start
+
+```
+npm install
+npm run build
+./src/user-entrypoint.mjs
+```
+
+
+
 ### Application versions
 
 This project has 3 runnable entrypoints (a raw ESM one, a built CJS one, and an SEA one). You can read more about them [here](./sea/README.md).

src/cli.mjs

@@ -36,9 +36,12 @@ export async function run(argvInput, _container) {
     builtYargs = buildYargs(argvInput);
     await parseYargs(builtYargs);
   } catch (e) {
-    const message = `${chalk.reset(await builtYargs.getHelp())}\n\n${chalk.red(
-      e.message,
-    )}`;
+    let subMessage = chalk.reset("Use 'fauna <command> --help' for more information about a command.");
+
+    if (argvInput.length > 0) {
+      subMessage = chalk.red(e.message);
+    }
+    const message = `${chalk.reset(await builtYargs.getHelp())}\n\n${subMessage}`;
     logger.stderr(message);
     logger.fatal(e.stack, "error");
     const exitCode = e.exitCode !== undefined ? e.exitCode : 1;

test/general-cli.mjs

@@ -40,7 +40,7 @@ describe("cli operations", function () {
   });
 
   // TODO: this doesn't work because turning on strict mode breaks parsing sub-commands. why?
-  it("should exit with a helpful message if a non-existant command is provided", async function () {
+  it("should exit with a helpful message if a non-existent command is provided", async function () {
     const logger = container.resolve("logger");
 
     // this command does not exist
@@ -56,6 +56,22 @@ describe("cli operations", function () {
     expect(container.resolve("parseYargs")).to.have.been.calledOnce;
   });
 
+  it("should exit with a helpful message if no command is provided", async function () {
+    const logger = container.resolve("logger");
+
+    // no input
+    try {
+      await run("", container);
+    } catch (e) {}
+
+    expect(logger.stdout).to.not.be.called;
+    const message = `${chalk.reset(await builtYargs.getHelp())}\n\n${chalk.reset(
+      "Use 'fauna <command> --help' for more information about a command.",
+    )}`;
+    expect(logger.stderr).to.have.been.calledWith(message);
+    expect(container.resolve("parseYargs")).to.have.been.calledOnce;
+  });
+
   it("should exit with a helpful message if the handler throws", async function () {
     const logger = container.resolve("logger");