Add verbose and reload commands (#297)

* Add verbose and reload commands

* Adds docs

* Adds a changeset

* Update witty-colts-fix.md

Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>

6 files changed, 58 insertions, 9 deletions

diff --git a/.changeset/witty-colts-fix.md b/.changeset/witty-colts-fix.md
new file mode 100644
index 000000000..0efdc57aa
--- /dev/null
+++ b/.changeset/witty-colts-fix.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Adds [`--verbose`](https://github.com/snowpackjs/astro/blob/main/docs/cli.md#--verbose) and [`--reload`](https://github.com/snowpackjs/astro/blob/main/docs/cli.md#--reload) flags to the `astro` CLI.
diff --git a/docs/cli.md b/docs/cli.md
index 2ef0592a5..213927277 100644
--- a/docs/cli.md
+++ b/docs/cli.md
@@ -20,6 +20,14 @@ The root is used for finding the Astro configuration file.
 astro --project-root examples/snowpack dev
 ```
 
+#### `--reload`
+
+Clears the cache (dependencies are built within Astro apps).
+
+#### `--verbose`
+
+Enables verbose logging, which is helpful when debugging an issue.
+
 #### `--version`
 
 Print the Astro version number and exit.
diff --git a/packages/astro/src/cli.ts b/packages/astro/src/cli.ts
index efad9f418..894db3a66 100644
--- a/packages/astro/src/cli.ts
+++ b/packages/astro/src/cli.ts
@@ -9,15 +9,20 @@ import yargs from 'yargs-parser';
 import { loadConfig } from './config.js';
 import { build } from './build.js';
 import devServer from './dev.js';
+import { reload } from './reload.js';
 
 const { readFile } = fsPromises;
 const buildAndExit = async (...args: Parameters<typeof build>) => {
   const ret = await build(...args);
   process.exit(ret);
 };
+const reloadAndExit = async () => {
+  const ret = await reload();
+  process.exit(ret);
+};
 
 type Arguments = yargs.Arguments;
-type cliCommand = 'help' | 'version' | 'dev' | 'build';
+type cliCommand = 'help' | 'version' | 'dev' | 'build' | 'reload';
 interface CLIState {
   cmd: cliCommand;
   options: {
@@ -25,6 +30,7 @@ interface CLIState {
     sitemap?: boolean;
     port?: number;
     config?: string;
+    reload?: boolean;
   };
 }
 
@@ -50,6 +56,10 @@ function resolveArgs(flags: Arguments): CLIState {
     case 'build':
       return { cmd: 'build', options };
     default:
+      if (flags.reload) {
+        return { cmd: 'reload', options };
+      }
+
       return { cmd: 'help', options };
   }
 }
@@ -66,6 +76,8 @@ function printHelp() {
   --config <path>       Specify the path to the Astro config file.
   --project-root <path> Specify the path to the project root folder.
   --no-sitemap          Disable sitemap generation (build only).
+  --reload              Clean the cache, reinstalling dependencies.
+  --verbose             Enable verbose logging
   --version             Show the version number and exit.
   --help                Show this help message.
 `);
@@ -84,22 +96,23 @@ function mergeCLIFlags(astroConfig: AstroConfig, flags: CLIState['options']) {
 }
 
 /** Handle `astro run` command */
-async function runCommand(rawRoot: string, cmd: (a: AstroConfig) => Promise<void>, options: CLIState['options']) {
+async function runCommand(rawRoot: string, cmd: (a: AstroConfig, options: any) => Promise<void>, options: CLIState['options']) {
   try {
     const projectRoot = options.projectRoot || rawRoot;
     const astroConfig = await loadConfig(projectRoot, options.config);
     mergeCLIFlags(astroConfig, options);
 
-    return cmd(astroConfig);
+    return cmd(astroConfig, options);
   } catch (err) {
     console.error(colors.red(err.toString() || err));
     process.exit(1);
   }
 }
 
-const cmdMap = new Map([
+const cmdMap = new Map<string, (a: AstroConfig, opts?: any) => Promise<void>>([
   ['build', buildAndExit],
   ['dev', devServer],
+  ['reload', reloadAndExit]
 ]);
 
 /** The primary CLI action */
@@ -118,11 +131,20 @@ export async function cli(args: string[]) {
       process.exit(0);
       break;
     }
+    case 'reload': {
+      await reloadAndExit();
+      break;
+    }
     case 'build':
     case 'dev': {
+      if(flags.reload) {
+        await reload();
+      }
+
       const cmd = cmdMap.get(state.cmd);
       if (!cmd) throw new Error(`Error running ${state.cmd}`);
       runCommand(flags._[3], cmd, state.options);
+      break;
     }
   }
 }
diff --git a/packages/astro/src/dev.ts b/packages/astro/src/dev.ts
index 4321adfaa..d040e9cc3 100644
--- a/packages/astro/src/dev.ts
+++ b/packages/astro/src/dev.ts
@@ -2,7 +2,6 @@ import 'source-map-support/register.js';
 import type { AstroConfig } from './@types/astro';
 import type { LogOptions } from './logger.js';
 
-import { logger as snowpackLogger } from 'snowpack';
 import { green } from 'kleur/colors';
 import http from 'http';
 import path from 'path';
@@ -13,9 +12,6 @@ import { stopTimer } from './build/util';
 
 const hostname = '127.0.0.1';
 
-// Disable snowpack from writing to stdout/err.
-snowpackLogger.level = 'silent';
-
 const logging: LogOptions = {
   level: 'debug',
   dest: defaultLogDestination,
diff --git a/packages/astro/src/reload.ts b/packages/astro/src/reload.ts
new file mode 100644
index 000000000..a82d66c95
--- /dev/null
+++ b/packages/astro/src/reload.ts
@@ -0,0 +1,18 @@
+import type { LogOptions } from './logger';
+import { clearCache } from 'snowpack';
+import { defaultLogDestination, debug, error, info, parseError } from './logger.js';
+
+const logging: LogOptions = {
+  level: 'debug',
+  dest: defaultLogDestination,
+};
+
+export async function reload() {
+  try {
+    info(logging, 'reload', `Clearing the cache...`);
+    await clearCache();
+    return 0;
+  } catch {
+    return 1;
+  }
+}
\ No newline at end of file
diff --git a/packages/astro/src/runtime.ts b/packages/astro/src/runtime.ts
index 931837910..86a816556 100644
--- a/packages/astro/src/runtime.ts
+++ b/packages/astro/src/runtime.ts
@@ -45,7 +45,7 @@ type LoadResultError = { statusCode: 500 } & ({ type: 'parse-error'; error: Comp
 export type LoadResult = (LoadResultSuccess | LoadResultNotFound | LoadResultRedirect | LoadResultError) & { collectionInfo?: CollectionInfo };
 
 // Disable snowpack from writing to stdout/err.
-snowpackLogger.level = 'silent';
+snowpackLogger.level = process.argv.includes('--verbose') ? 'debug' : 'silent';
 
 /** Pass a URL to Astro to resolve and build */
 async function load(config: RuntimeConfig, rawPathname: string | undefined): Promise<LoadResult> {