3 files changed, 49 insertions, 16 deletions

diff --git a/packages/monorepo-scripts/src/publish.ts b/packages/monorepo-scripts/src/publish.ts
index 3b5070395..d27baf5f8 100644
--- a/packages/monorepo-scripts/src/publish.ts
+++ b/packages/monorepo-scripts/src/publish.ts
@@ -76,8 +76,10 @@ async function confirmAsync(message: string): Promise<void> {
     utils.log(`Calling 'lerna publish'...`);
     await lernaPublishAsync(packageToNextVersion);
     const isStaging = false;
-    await generateAndUploadDocJsonsAsync(packagesWithDocs, isStaging);
-    await publishReleaseNotesAsync(updatedPublicPackages);
+    const shouldUploadDocs = !configs.IS_LOCAL_PUBLISH;
+    await generateAndUploadDocJsonsAsync(packagesWithDocs, isStaging, shouldUploadDocs);
+    const isDryRun = configs.IS_LOCAL_PUBLISH;
+    await publishReleaseNotesAsync(updatedPublicPackages, isDryRun);
 })().catch(err => {
     utils.log(err);
     process.exit(1);
@@ -101,10 +103,9 @@ function getPackagesWithDocs(allUpdatedPackages: Package[]): Package[] {
     return updatedPackagesWithDocPages;
 }
 
-async function generateAndUploadDocJsonsAsync(packagesWithDocs: Package[], isStaging: boolean): Promise<void> {
+async function generateAndUploadDocJsonsAsync(packagesWithDocs: Package[], isStaging: boolean, shouldUploadDocs: boolean): Promise<void> {
     for (const pkg of packagesWithDocs) {
         const nameWithoutPrefix = pkg.packageJson.name.replace('@0xproject/', '');
-        const shouldUploadDocs = true;
         const docGenerateAndUploadUtils = new DocGenerateAndUploadUtils(nameWithoutPrefix, isStaging, shouldUploadDocs);
         await docGenerateAndUploadUtils.generateAndUploadDocsAsync();
     }
@@ -114,7 +115,8 @@ async function confirmDocPagesRenderAsync(packagesWithDocs: Package[]): Promise<
     // push docs to staging
     utils.log("Upload all docJson's to S3 staging...");
     const isStaging = true;
-    await generateAndUploadDocJsonsAsync(packagesWithDocs, isStaging);
+    const shouldUploadDocs = true;
+    await generateAndUploadDocJsonsAsync(packagesWithDocs, isStaging, shouldUploadDocs);
 
     // deploy website to staging
     utils.log('Deploy website to staging...');
diff --git a/packages/monorepo-scripts/src/publish_release_notes.ts b/packages/monorepo-scripts/src/publish_release_notes.ts
index 5afcc8775..1a0ec59e5 100644
--- a/packages/monorepo-scripts/src/publish_release_notes.ts
+++ b/packages/monorepo-scripts/src/publish_release_notes.ts
@@ -1,10 +1,21 @@
+import * as yargs from 'yargs';
+
 import { publishReleaseNotesAsync } from './utils/github_release_utils';
 import { utils } from './utils/utils';
 
+const args = yargs
+    .option('isDryRun', {
+        describe: 'Whether we wish to do a dry run, not committing anything to Github',
+        type: 'boolean',
+        demandOption: true,
+    })
+    .example('$0 --isDryRun true', 'Full usage example').argv;
+
 // tslint:disable-next-line:no-floating-promises
 (async () => {
+    const isDryRun = args.isDryRun;
     const shouldIncludePrivate = false;
     const allUpdatedPackages = await utils.getUpdatedPackagesAsync(shouldIncludePrivate);
 
-    await publishReleaseNotesAsync(allUpdatedPackages);
+    await publishReleaseNotesAsync(allUpdatedPackages, isDryRun);
 })();
diff --git a/packages/monorepo-scripts/src/utils/github_release_utils.ts b/packages/monorepo-scripts/src/utils/github_release_utils.ts
index 28dce70ac..43d0d9fc3 100644
--- a/packages/monorepo-scripts/src/utils/github_release_utils.ts
+++ b/packages/monorepo-scripts/src/utils/github_release_utils.ts
@@ -12,7 +12,7 @@ import { utils } from './utils';
 
 const publishReleaseAsync = promisify(publishRelease);
 // tslint:disable-next-line:completed-docs
-export async function publishReleaseNotesAsync(updatedPublishPackages: Package[]): Promise<void> {
+export async function publishReleaseNotesAsync(updatedPublishPackages: Package[], isDryRun: boolean): Promise<void> {
     // Git push a tag representing this publish (publish-{commit-hash}) (truncate hash)
     const result = await execAsync('git log -n 1 --pretty=format:"%H"', { cwd: constants.monorepoRootPath });
     const latestGitCommit = result.stdout;
@@ -20,10 +20,22 @@ export async function publishReleaseNotesAsync(updatedPublishPackages: Package[]
     const shortenedGitCommit = latestGitCommit.slice(0, prefixLength);
     const tagName = `monorepo@${shortenedGitCommit}`;
 
-    await execAsync(`git rev-parse ${tagName}`);
-    await execAsync(`git tag ${tagName}`);
+    if (!isDryRun) {
+        try {
+            await execAsync(`git tag ${tagName}`);
+        } catch (err) {
+            if (_.includes(err.message, 'already exists'))  {
+                // Noop tag creation since already exists
+            } else {
+                throw err;
+            }
+        }
+        const {stdout} = await execAsync(`git ls-remote --tags origin refs/tags/${tagName}`);
+        if (_.isEmpty(stdout)) {
+            await execAsync(`git push origin ${tagName}`);
+        }
+    }
 
-    await execAsync(`git push origin ${tagName}`);
     const releaseName = `0x monorepo - ${shortenedGitCommit}`;
 
     let assets: string[] = [];
@@ -42,11 +54,7 @@ export async function publishReleaseNotesAsync(updatedPublishPackages: Package[]
     });
     const finalAssets = adjustAssetPaths(assets);
 
-    utils.log('Publishing release notes ', releaseName, '...');
-    // TODO: Currently publish-release doesn't let you specify the labels for each asset uploaded
-    // Ideally we would like to name the assets after the package they are from
-    // Source: https://github.com/remixz/publish-release/issues/39
-    await publishReleaseAsync({
+    const publishReleaseConfigs = {
         token: constants.githubPersonalAccessToken,
         owner: '0xProject',
         tag: tagName,
@@ -58,7 +66,19 @@ export async function publishReleaseNotesAsync(updatedPublishPackages: Package[]
         reuseRelease: true,
         reuseDraftOnly: false,
         assets: finalAssets,
-    });
+    };
+
+    if (isDryRun) {
+        utils.log(`Dry run: stopping short of publishing release notes to github`);
+        utils.log(`Would publish with configs:\n${JSON.stringify(publishReleaseConfigs, null, '\t')}`);
+        return;
+    }
+
+    utils.log('Publishing release notes ', releaseName, '...');
+    // TODO: Currently publish-release doesn't let you specify the labels for each asset uploaded
+    // Ideally we would like to name the assets after the package they are from
+    // Source: https://github.com/remixz/publish-release/issues/39
+    await publishReleaseAsync(publishReleaseConfigs);
 }
 
 // Asset paths should described from the monorepo root. This method prefixes