/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {error} from '../utils/console';
import {COMMIT_TYPES, getCommitMessageConfig, ScopeRequirement} from './config';
import {parseCommitMessage} from './parse';
/** Options for commit message validation. */
export interface ValidateCommitMessageOptions {
disallowSquash?: boolean;
nonFixupCommitHeaders?: string[];
}
/** Regex matching a URL for an entire commit body line. */
const COMMIT_BODY_URL_LINE_RE = /^https?:\/\/.*$/;
/** Validate a commit message against using the local repo's config. */
export function validateCommitMessage(
commitMsg: string, options: ValidateCommitMessageOptions = {}) {
function printError(errorMessage: string) {
error(
`INVALID COMMIT MSG: \n` +
`${'─'.repeat(40)}\n` +
`${commitMsg}\n` +
`${'─'.repeat(40)}\n` +
`ERROR: \n` +
` ${errorMessage}` +
`\n\n` +
`The expected format for a commit is: \n` +
`<type>(<scope>): <subject>\n\n<body>`);
}
const config = getCommitMessageConfig().commitMessage;
const commit = parseCommitMessage(commitMsg);
////////////////////////////////////
// Checking revert, squash, fixup //
////////////////////////////////////
// All revert commits are considered valid.
if (commit.isRevert) {
return true;
}
// All squashes are considered valid, as the commit will be squashed into another in
// the git history anyway, unless the options provided to not allow squash commits.
if (commit.isSquash) {
if (options.disallowSquash) {
printError('The commit must be manually squashed into the target commit');
return false;
}
return true;
}
// Fixups commits are considered valid, unless nonFixupCommitHeaders are provided to check
// against. If `nonFixupCommitHeaders` is not empty, we check whether there is a corresponding
// non-fixup commit (i.e. a commit whose header is identical to this commit's header after
// stripping the `fixup! ` prefix), otherwise we assume this verification will happen in another
// check.
if (commit.isFixup) {
if (options.nonFixupCommitHeaders && !options.nonFixupCommitHeaders.includes(commit.header)) {
printError(
'Unable to find match for fixup commit among prior commits: ' +
(options.nonFixupCommitHeaders.map(x => `\n ${x}`).join('') || '-'));
return false;
}
return true;
}
////////////////////////////
// Checking commit header //
////////////////////////////
if (commit.header.length > config.maxLineLength) {
printError(`The commit message header is longer than ${config.maxLineLength} characters`);
return false;
}
if (!commit.type) {
printError(`The commit message header does not match the expected format.`);
return false;
}
if (COMMIT_TYPES[commit.type] === undefined) {
printError(`'${commit.type}' is not an allowed type.\n => TYPES: ${
Object.keys(COMMIT_TYPES).join(', ')}`);
return false;
}
/** The scope requirement level for the provided type of the commit message. */
const scopeRequirementForType = COMMIT_TYPES[commit.type].scope;
if (scopeRequirementForType === ScopeRequirement.Forbidden && commit.scope) {
printError(`Scopes are forbidden for commits with type '${commit.type}', but a scope of '${
commit.scope}' was provided.`);
return false;
}
if (scopeRequirementForType === ScopeRequirement.Required && !commit.scope) {
printError(
`Scopes are required for commits with type '${commit.type}', but no scope was provided.`);
return false;
}
if (commit.scope && !config.scopes.includes(commit.scope)) {
printError(
`'${commit.scope}' is not an allowed scope.\n => SCOPES: ${config.scopes.join(', ')}`);
return false;
}
// Commits with the type of `release` do not require a commit body.
if (commit.type === 'release') {
return true;
}
//////////////////////////
// Checking commit body //
//////////////////////////
if (!config.minBodyLengthTypeExcludes?.includes(commit.type) &&
commit.bodyWithoutLinking.trim().length < config.minBodyLength) {
printError(`The commit message body does not meet the minimum length of ${
config.minBodyLength} characters`);
return false;
}
const bodyByLine = commit.body.split('\n');
const lineExceedsMaxLength = bodyByLine.some(line => {
// Check if any line exceeds the max line length limit. The limit is ignored for
// lines that just contain an URL (as these usually cannot be wrapped or shortened).
return line.length > config.maxLineLength && !COMMIT_BODY_URL_LINE_RE.test(line);
});
if (lineExceedsMaxLength) {
printError(
`The commit message body contains lines greater than ${config.maxLineLength} characters`);
return false;
}
return true;
}