Function parseGitAttributes

packages/web/src/lib/gitattributes.ts:19–59

(content: string)

//   - "linguist-language=Go"
//   - etc.
export function parseGitAttributes(content: string): GitAttributes {
    const rules: GitAttributeRule[] = [];

    for (const raw of content.split('\n')) {
        const line = raw.trim();
        if (line === '' || line.startsWith('#')) {
            continue;
        }

        const fields = line.split(/\s+/);
        if (fields.length < 2) {
            continue;
        }

        const pattern = fields[0];
        const attrs: Record<string, string> = {};

        for (const field of fields.slice(1)) {
            if (field.startsWith('!')) {
                // !attr means unspecified (reset to default)
                attrs[field.slice(1)] = 'unspecified';
            } else if (field.startsWith('-')) {
                // -attr means unset (false)
                attrs[field.slice(1)] = 'false';
            } else {
                const eqIdx = field.indexOf('=');
                if (eqIdx !== -1) {
                    // attr=value
                    attrs[field.slice(0, eqIdx)] = field.slice(eqIdx + 1);
                } else {
                    // attr alone means set (true)
                    attrs[field] = 'true';
                }
            }
        }

        rules.push({ pattern, attrs });
    }

    return { rules };
}

// resolveLanguageFromGitAttributes returns the linguist-language override for
// the given file path based on the parsed .gitattributes rules, or undefined