refactor(ng-dev/pr): Migrate discover-new-conflicts and rebase comman…

…ds to CommandModules

Use CommandModules for discover-new-conflicts and rebase commands to better align with how all of the
other subcommands are defined.

ng-dev/pr/cli.ts

@@ -10,31 +10,18 @@ import * as yargs from 'yargs';
 
 import {CheckTargetBranchesModule} from './check-target-branches/cli';
 import {CheckoutCommandModule} from './checkout/cli';
-import {
-  buildDiscoverNewConflictsCommand,
-  handleDiscoverNewConflictsCommand,
-} from './discover-new-conflicts/cli';
+import {DiscoverNewConflictsCommandModule} from './discover-new-conflicts/cli';
 import {MergeCommandModule} from './merge/cli';
-import {buildRebaseCommand, handleRebaseCommand} from './rebase/cli';
+import {RebaseCommandModule} from './rebase/cli';
 
 /** Build the parser for pull request commands. */
 export function buildPrParser(localYargs: yargs.Argv) {
   return localYargs
     .help()
     .strict()
     .demandCommand()
-    .command(
-      'discover-new-conflicts <pr>',
-      'Check if a pending PR causes new conflicts for other pending PRs',
-      buildDiscoverNewConflictsCommand,
-      handleDiscoverNewConflictsCommand,
-    )
-    .command(
-      'rebase <pr>',
-      'Rebase a pending PR and push the rebased commits back to Github',
-      buildRebaseCommand,
-      handleRebaseCommand,
-    )
+    .command(DiscoverNewConflictsCommandModule)
+    .command(RebaseCommandModule)
     .command(MergeCommandModule)
     .command(CheckoutCommandModule)
     .command(CheckTargetBranchesModule);

ng-dev/pr/discover-new-conflicts/cli.ts

@@ -6,23 +6,21 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {Arguments, Argv} from 'yargs';
+import {Arguments, Argv, CommandModule} from 'yargs';
 
 import {error} from '../../utils/console';
 import {addGithubTokenOption} from '../../utils/git/github-yargs';
 
 import {discoverNewConflictsForPr} from './index';
 
 /** The options available to the discover-new-conflicts command via CLI. */
-export interface DiscoverNewConflictsCommandOptions {
+export interface DiscoverNewConflictsOptions {
   date: number;
   pr: number;
 }
 
 /** Builds the discover-new-conflicts pull request command. */
-export function buildDiscoverNewConflictsCommand(
-  yargs: Argv,
-): Argv<DiscoverNewConflictsCommandOptions> {
+function builder(yargs: Argv): Argv<DiscoverNewConflictsOptions> {
   return addGithubTokenOption(yargs)
     .option('date', {
       description: 'Only consider PRs updated since provided date',
@@ -34,10 +32,7 @@ export function buildDiscoverNewConflictsCommand(
 }
 
 /** Handles the discover-new-conflicts pull request command. */
-export async function handleDiscoverNewConflictsCommand({
-  pr,
-  date,
-}: Arguments<DiscoverNewConflictsCommandOptions>) {
+async function handler({pr, date}: Arguments<DiscoverNewConflictsOptions>) {
   // If a provided date is not able to be parsed, yargs provides it as NaN.
   if (isNaN(date)) {
     error('Unable to parse the value provided via --date flag');
@@ -55,3 +50,11 @@ function getThirtyDaysAgoDate() {
   date.setDate(date.getDate() - 30);
   return date.getTime();
 }
+
+/** yargs command module for discovering new conflicts for a PR  */
+export const DiscoverNewConflictsCommandModule: CommandModule<{}, DiscoverNewConflictsOptions> = {
+  handler,
+  builder,
+  command: 'checkout <pr>',
+  describe: 'Checkout a PR from the upstream repo',
+};

ng-dev/pr/rebase/cli.ts

@@ -6,27 +6,32 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {Arguments, Argv} from 'yargs';
+import {Arguments, Argv, CommandModule} from 'yargs';
 
 import {addGithubTokenOption} from '../../utils/git/github-yargs';
 
 import {rebasePr} from './index';
 
 /** The options available to the rebase command via CLI. */
-export interface RebaseCommandOptions {
+export interface RebaseOptions {
   githubToken: string;
   pr: number;
 }
 
 /** Builds the rebase pull request command. */
-export function buildRebaseCommand(yargs: Argv): Argv<RebaseCommandOptions> {
+function builder(yargs: Argv): Argv<RebaseOptions> {
   return addGithubTokenOption(yargs).positional('pr', {type: 'number', demandOption: true});
 }
 
 /** Handles the rebase pull request command. */
-export async function handleRebaseCommand({
-  pr,
-  githubToken,
-}: Arguments<RebaseCommandOptions>) {
+async function handler({pr, githubToken}: Arguments<RebaseOptions>) {
   process.exitCode = await rebasePr(pr, githubToken);
 }
+
+/** yargs command module for rebaseing a PR  */
+export const RebaseCommandModule: CommandModule<{}, RebaseOptions> = {
+  handler,
+  builder,
+  command: 'checkout <pr>',
+  describe: 'Checkout a PR from the upstream repo',
+};