124 lines
4.5 KiB
TypeScript
124 lines
4.5 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 {getConfig, GitClientConfig, NgDevConfig} from '../../utils/config';
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import {GithubApiMergeStrategyConfig} from './strategies/api-merge';
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/**
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* Possible merge methods supported by the Github API.
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* https://developer.github.com/v3/pulls/#merge-a-pull-request-merge-button.
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*/
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export type GithubApiMergeMethod = 'merge'|'squash'|'rebase';
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/**
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* Target labels represent Github pull requests labels. These labels instruct the merge
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* script into which branches a given pull request should be merged to.
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*/
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export interface TargetLabel {
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/** Pattern that matches the given target label. */
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pattern: RegExp|string;
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/**
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* List of branches a pull request with this target label should be merged into.
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* Can also be wrapped in a function that accepts the target branch specified in the
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* Github Web UI. This is useful for supporting labels like `target: development-branch`.
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*/
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branches: string[]|((githubTargetBranch: string) => string[]);
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}
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/**
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* Configuration for the merge script with all remote options specified. The
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* default `MergeConfig` has does not require any of these options as defaults
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* are provided by the common dev-infra github configuration.
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*/
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export type MergeConfigWithRemote = MergeConfig&{remote: GitClientConfig};
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/** Configuration for the merge script. */
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export interface MergeConfig {
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/**
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* Configuration for the upstream remote. All of these options are optional as
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* defaults are provided by the common dev-infra github configuration.
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*/
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remote?: GitClientConfig;
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/** List of target labels. */
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labels: TargetLabel[];
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/** Required base commits for given branches. */
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requiredBaseCommits?: {[branchName: string]: string};
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/** Pattern that matches labels which imply a signed CLA. */
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claSignedLabel: string|RegExp;
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/** Pattern that matches labels which imply a merge ready pull request. */
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mergeReadyLabel: string|RegExp;
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/** Label which can be applied to fixup commit messages in the merge script. */
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commitMessageFixupLabel: string|RegExp;
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/**
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* Whether pull requests should be merged using the Github API. This can be enabled
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* if projects want to have their pull requests show up as `Merged` in the Github UI.
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* The downside is that fixup or squash commits no longer work as the Github API does
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* not support this.
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*/
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githubApiMerge: false|GithubApiMergeStrategyConfig;
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}
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/**
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* Configuration of the merge script in the dev-infra configuration. Note that the
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* merge configuration is retrieved lazily as usually these configurations rely
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* on branch name computations. We don't want to run these immediately whenever
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* the dev-infra configuration is loaded as that could slow-down other commands.
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*/
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export type DevInfraMergeConfig = NgDevConfig<{'merge': () => MergeConfig}>;
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/** Loads and validates the merge configuration. */
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export function loadAndValidateConfig(): {config?: MergeConfigWithRemote, errors?: string[]} {
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const config: Partial<DevInfraMergeConfig> = getConfig();
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if (config.merge === undefined) {
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return {errors: ['No merge configuration found. Set the `merge` configuration.']};
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}
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if (typeof config.merge !== 'function') {
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return {errors: ['Expected merge configuration to be defined lazily through a function.']};
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}
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const mergeConfig = config.merge();
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const errors = validateMergeConfig(mergeConfig);
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if (errors.length) {
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return {errors};
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}
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if (mergeConfig.remote) {
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mergeConfig.remote = {...config.github, ...mergeConfig.remote};
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} else {
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mergeConfig.remote = config.github;
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}
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// We always set the `remote` option, so we can safely cast the
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// config to `MergeConfigWithRemote`.
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return {config: mergeConfig as MergeConfigWithRemote};
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}
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/** Validates the specified configuration. Returns a list of failure messages. */
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function validateMergeConfig(config: Partial<MergeConfig>): string[] {
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const errors: string[] = [];
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if (!config.labels) {
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errors.push('No label configuration.');
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} else if (!Array.isArray(config.labels)) {
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errors.push('Label configuration needs to be an array.');
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}
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if (!config.claSignedLabel) {
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errors.push('No CLA signed label configured.');
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}
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if (!config.mergeReadyLabel) {
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errors.push('No merge ready label configured.');
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}
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if (config.githubApiMerge === undefined) {
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errors.push('No explicit choice of merge strategy. Please set `githubApiMerge`.');
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}
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return errors;
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}
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