@commitlint/read/lib/read.js

Read commit messages from a specified range or last edit

import minimist from 'minimist';
import { getHistoryCommits } from './get-history-commits.js';
import { getEditCommit } from './get-edit-commit.js';
import { x } from 'tinyexec';
// Get commit messages
export default async function getCommitMessages(settings) {
    const { cwd, fromLastTag, to, last, edit, gitLogArgs } = settings;
    let from = settings.from;
    if (edit) {
        return getEditCommit(cwd, edit);
    }
    if (last) {
        const gitCommandResult = await x('git', ['log', '-1', '--pretty=format:%B'], { nodeOptions: { cwd } });
        let output = gitCommandResult.stdout.trim();
        // strip output of extra quotation marks ("")
        if (output[0] == '"' && output[output.length - 1] == '"')
            output = output.slice(1, -1);
        return [output];
    }
    if (!from && fromLastTag) {
        const output = await x('git', [
            'describe',
            '--abbrev=40',
            '--always',
            '--first-parent',
            '--long',
            '--tags',
        ], { nodeOptions: { cwd } });
        const stdout = output.stdout.trim();
        if (stdout.length === 40) {
            // Hash only means no last tag. Use that as the from ref which
            // results in a no-op.
            from = stdout;
        }
        else {
            // Description will be in the format: <tag>-<count>-g<hash>
            // Example: v3.2.0-11-g9057371a52adaae5180d93fe4d0bb808d874b9fb
            // Minus zero based (1), dash (1), "g" prefix (1), hash (40) = -43
            const tagSlice = stdout.lastIndexOf('-', stdout.length - 43);
            from = stdout.slice(0, tagSlice);
        }
    }
    let gitOptions = { from, to };
    if (gitLogArgs) {
        gitOptions = {
            ...minimist(gitLogArgs.split(' ')),
            from,
            to,
        };
    }
    return getHistoryCommits(gitOptions, { cwd });
}
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