3d7e207a25
When multiple target labels are applied to a PR, it should be considered invalid as our tooling does not support a single PR targetting multiple trains/versions. PR Close #40156
61 lines
2.0 KiB
TypeScript
61 lines
2.0 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {MergeConfig, TargetLabel} from './config';
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import {matchesPattern} from './string-pattern';
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/**
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* Unique error that can be thrown in the merge configuration if an
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* invalid branch is targeted.
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*/
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export class InvalidTargetBranchError {
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constructor(public failureMessage: string) {}
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}
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/**
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* Unique error that can be thrown in the merge configuration if an
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* invalid label has been applied to a pull request.
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*/
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export class InvalidTargetLabelError {
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constructor(public failureMessage: string) {}
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}
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/** Gets the target label from the specified pull request labels. */
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export function getTargetLabelFromPullRequest(
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config: Pick<MergeConfig, 'labels'>, labels: string[]): TargetLabel {
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/** List of discovered target labels for the PR. */
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const matches = [];
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for (const label of labels) {
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const match = config.labels.find(({pattern}) => matchesPattern(label, pattern));
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if (match !== undefined) {
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matches.push(match);
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}
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}
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if (matches.length === 1) {
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return matches[0];
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}
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if (matches.length === 0) {
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throw new InvalidTargetLabelError(
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'Unable to determine target for the PR as it has no target label.');
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}
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throw new InvalidTargetLabelError(
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'Unable to determine target for the PR as it has multiple target labels.');
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}
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/**
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* Gets the branches from the specified target label.
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*
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* @throws {InvalidTargetLabelError} Invalid label has been applied to pull request.
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* @throws {InvalidTargetBranchError} Invalid Github target branch has been selected.
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*/
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export async function getBranchesFromTargetLabel(
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label: TargetLabel, githubTargetBranch: string): Promise<string[]> {
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return typeof label.branches === 'function' ? await label.branches(githubTargetBranch) :
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await label.branches;
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}
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