1 files changed, 71 insertions, 0 deletions
diff --git a/packages/monorepo-scripts/src/prepublish_checks.ts b/packages/monorepo-scripts/src/prepublish_checks.ts
new file mode 100644
index 000000000..2c096d8f6
--- /dev/null
+++ b/packages/monorepo-scripts/src/prepublish_checks.ts
@@ -0,0 +1,71 @@
+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.');
+    }
+
+    utils.log('Checking that git branch is up to date with upstream...');
+    await execAsync('git fetch');
+    const res = await execAsync('git status -bs'); // s - short format, b - branch info
+    /**
+     * Possible outcomes
+     * ## branch_name...origin/branch_name [behind n]
+     * ## branch_name...origin/branch_name [ahead n]
+     * ## branch_name...origin/branch_name
+     */
+    const gitShortStatusHeader = res.stdout.split('\n')[0];
+    if (gitShortStatusHeader.includes('behind')) {
+        throw new Error('Your branch is behind upstream. Please pull before publishing.');
+    } else if (gitShortStatusHeader.includes('ahead')) {
+        throw new Error('Your branch is ahead of upstream. Please push before publishing.');
+    }
+}
+
+checkPublishRequiredSetupAsync().catch(err => {
+    utils.log(err.message);
+    process.exit(1);
+});