semantic-commit-emoji/dist/index.js

CLI for rewriting semantic commits with an emoji prefix

// Special automatic commit overrides
const versionRegex = new RegExp(/^v?([0-9]+).([0-9]+).([0-9]+)(?:-([0-9a-z-]+(?:.[0-9a-z-]+)*))?(?:\+[0-9a-z-]+)?$/, "gi");
const revertRegex = new RegExp(/^revert(: | ")/, "gi");
const mergeRegex = new RegExp(/^merge /, "gi");
const fixupRegex = new RegExp(/^fixup! /, "gi");
const semanticEmojiRegex = new RegExp(/^(?::([^:])+:\s*)?(\w*)(?:\((.*)\))?!?: (.*)$/, "i");
/**
 * Prepends a corresponding emoji to a commit message and return the result.
 *
 * In order of priority, matches a versions message, a merge message, a revert message, and
 * finally falls back to semantic commit message syntax. If a match has been found, map the
 * detected semantic commit message type to an emoji and prepend it to the original message.
 * If a match was not found, return the original message.
 */
export default (config, commitString) => {
    const optionalSpace = config.withSpace ? " " : "";
    const [firstLine] = commitString.split("\n", 1);
    function updateMessage(emoji) {
        const emojiPrefix = emoji !== "" ? `:${emoji}:${optionalSpace}` : "";
        return emojiPrefix + commitString;
    }
    const versionMatch = firstLine.match(versionRegex);
    if (versionMatch !== null) {
        return updateMessage(config.automaticTypes.version);
    }
    const mergeMatach = firstLine.match(mergeRegex);
    if (mergeMatach !== null) {
        return updateMessage(config.automaticTypes.merge);
    }
    const revertMatach = firstLine.match(revertRegex);
    if (revertMatach !== null) {
        return updateMessage(config.automaticTypes.revert);
    }
    const fixupMatach = firstLine.match(fixupRegex);
    if (fixupMatach !== null) {
        return updateMessage(config.automaticTypes.fixup);
    }
    const match = firstLine.match(semanticEmojiRegex);
    if (match === null) {
        return commitString;
    }
    const [, hasEmoji, commitType] = match;
    if (hasEmoji !== undefined) {
        return commitString;
    }
    const emoji = config.conventionalTypes[commitType] ?? "";
    return updateMessage(emoji);
};