3 files changed, 56 insertions, 53 deletions
diff --git a/packages/monorepo-scripts/package.json b/packages/monorepo-scripts/package.json
index 02a8e4a42..2bbf4df11 100644
--- a/packages/monorepo-scripts/package.json
+++ b/packages/monorepo-scripts/package.json
@@ -16,6 +16,7 @@
         "find_unused_deps": "run-s build script:find_unused_deps",
         "remove_tags": "run-s build script:remove_tags",
         "script:deps_versions": "node ./lib/deps_versions.js",
+        "script:prepublish_checks": "node ./lib/prepublish_checks.js",
         "script:publish": "IS_DRY_RUN=true node ./lib/publish.js",
         "script:find_unused_deps": "node ./lib/find_unused_dependencies.js",
         "script:remove_tags": "node ./lib/remove_tags.js"
diff --git a/packages/monorepo-scripts/src/prepublish_checks.ts b/packages/monorepo-scripts/src/prepublish_checks.ts
new file mode 100644
index 000000000..ae58524f5
--- /dev/null
+++ b/packages/monorepo-scripts/src/prepublish_checks.ts
@@ -0,0 +1,55 @@
+import * as _ from 'lodash';
+import { exec as execAsync } from 'promisify-child-process';
+
+import { constants } from './constants';
+import { utils } from './utils/utils';
+
+async function checkPublishRequiredSetupAsync(): Promise<void> {
+    // check to see if logged into npm before publishing
+    try {
+        // HACK: for some reason on some setups, the `npm whoami` will not recognize a logged-in user
+        // unless run with `sudo` (i.e Fabio's NVM setup) but is fine for others (Jacob's NVM setup).
+        utils.log('Checking that the user is logged in on npm...');
+        await execAsync(`sudo npm whoami`);
+    } catch (err) {
+        throw new Error('You must be logged into npm in the commandline to publish. Run `npm login` and try again.');
+    }
+
+    // Check to see if Git personal token setup
+    if (_.isUndefined(constants.githubPersonalAccessToken)) {
+        throw new Error(
+            'You must have a Github personal access token set to an envVar named `GITHUB_PERSONAL_ACCESS_TOKEN_0X_JS`. Add it then try again.',
+        );
+    }
+
+    // Check Yarn version is 1.X
+    utils.log('Checking the yarn version...');
+    const result = await execAsync(`yarn --version`);
+    const version = result.stdout;
+    const versionSegments = version.split('.');
+    const majorVersion = _.parseInt(versionSegments[0]);
+    if (majorVersion < 1) {
+        throw new Error('Your yarn version must be v1.x or higher. Upgrade yarn and try again.');
+    }
+
+    // Check that `aws` commandline tool is installed
+    try {
+        utils.log('Checking that aws CLI tool is installed...');
+        await execAsync(`aws help`);
+    } catch (err) {
+        throw new Error('You must have `awscli` commandline tool installed. Install it and try again.');
+    }
+
+    // Check that `aws` credentials are setup
+    try {
+        utils.log('Checking that aws credentials are configured...');
+        await execAsync(`aws sts get-caller-identity`);
+    } catch (err) {
+        throw new Error('You must setup your AWS credentials by running `aws configure`. Do this and try again.');
+    }
+}
+
+checkPublishRequiredSetupAsync().catch(err => {
+    utils.log(err);
+    process.exit(1);
+});
diff --git a/packages/monorepo-scripts/src/publish.ts b/packages/monorepo-scripts/src/publish.ts
index 022fe172e..45dea9796 100644
--- a/packages/monorepo-scripts/src/publish.ts
+++ b/packages/monorepo-scripts/src/publish.ts
@@ -39,11 +39,6 @@ const packageNameToWebsitePath: { [name: string]: string } = {
 };
 
 (async () => {
-    const hasRequiredSetup = await checkPublishRequiredSetupAsync();
-    if (!hasRequiredSetup) {
-        return; // abort
-    }
-
     // Fetch public, updated Lerna packages
     const shouldIncludePrivate = false;
     const updatedPublicLernaPackages = await utils.getUpdatedLernaPackagesAsync(shouldIncludePrivate);
@@ -114,54 +109,6 @@ package.ts. Please add an entry for it and try again.`,
     }
 }
 
-async function checkPublishRequiredSetupAsync(): Promise<boolean> {
-    // check to see if logged into npm before publishing
-    try {
-        // HACK: for some reason on some setups, the `npm whoami` will not recognize a logged-in user
-        // unless run with `sudo` (i.e Fabio's NVM setup) but is fine for others (Jacob's NVM setup).
-        await execAsync(`sudo npm whoami`);
-    } catch (err) {
-        utils.log('You must be logged into npm in the commandline to publish. Run `npm login` and try again.');
-        return false;
-    }
-
-    // Check to see if Git personal token setup
-    if (_.isUndefined(constants.githubPersonalAccessToken)) {
-        utils.log(
-            'You must have a Github personal access token set to an envVar named `GITHUB_PERSONAL_ACCESS_TOKEN_0X_JS`. Add it then try again.',
-        );
-        return false;
-    }
-
-    // Check Yarn version is 1.X
-    const result = await execAsync(`yarn --version`);
-    const version = result.stdout;
-    const versionSegments = version.split('.');
-    const majorVersion = _.parseInt(versionSegments[0]);
-    if (majorVersion < 1) {
-        utils.log('Your yarn version must be v1.x or higher. Upgrade yarn and try again.');
-        return false;
-    }
-
-    // Check that `aws` commandline tool is installed
-    try {
-        await execAsync(`aws help`);
-    } catch (err) {
-        utils.log('You must have `awscli` commandline tool installed. Install it and try again.');
-        return false;
-    }
-
-    // Check that `aws` credentials are setup
-    try {
-        await execAsync(`aws sts get-caller-identity`);
-    } catch (err) {
-        utils.log('You must setup your AWS credentials by running `aws configure`. Do this and try again.');
-        return false;
-    }
-
-    return true;
-}
-
 async function pushChangelogsToGithubAsync(): Promise<void> {
     await execAsync(`git add . --all`, { cwd: constants.monorepoRootPath });
     await execAsync(`git commit -m "Updated CHANGELOGS"`, { cwd: constants.monorepoRootPath });