/**
 * rustfmt lens for Rust code formatting
 *
 * rustfmt is the official Rust code formatter.
 * Output format: With --check flag, outputs file paths that need formatting.
 *
 * @see https://rust-lang.github.io/rustfmt/
 */
import { BaseLens } from '../base/BaseLens.js';
import { LensResult, ExecuteResult } from '../../types/index.js';
/**
 * Parsed rustfmt output
 */
interface RustfmtParsedOutput {
    /** Files that need formatting */
    filesNeedingFormatting: string[];
    /** Total files checked (if available) */
    filesChecked: number;
}
/**
 * Lens for rustfmt Rust formatter
 */
export declare class RustfmtLens extends BaseLens<RustfmtParsedOutput> {
    readonly name = "rustfmt";
    readonly description = "Rust code formatter";
    readonly languages: string[];
    readonly supportedTools: string[];
    readonly requirements: import("../..").LensRequirements;
    private pathMapper?;
    /**
     * Calculate quality score (0-100) from rustfmt results
     *
     * Scoring algorithm:
     * - Start at 100
     * - Subtract penalty based on percentage of files needing formatting
     * - Formula: 100 - (filesNeedingFormatting / filesChecked * 100)
     * - Floor at 0
     */
    static calculateQualityScore(result: LensResult): number;
    /**
     * Parse rustfmt --check output
     *
     * When using `cargo fmt --check`, the output shows:
     * - Diff output for files that need formatting
     * - "Diff in <path>" lines indicate files needing formatting
     *
     * When using `cargo fmt -- --check`, with exit code:
     * - 0: All files formatted correctly
     * - 1: Some files need formatting
     *
     * The output to stderr looks like:
     * Diff in /path/to/file.rs at line 10:
     * -old line
     * +new line
     */
    parse(output: ExecuteResult): RustfmtParsedOutput;
    /**
     * Format rustfmt results to standard format
     */
    format(parsed: RustfmtParsedOutput): LensResult;
    /**
     * Get or create path mapper
     */
    private getPathMapper;
    /**
     * Prepare command to ensure --check flag
     */
    prepareCommand(command: string): string;
}
export {};
//# sourceMappingURL=RustfmtLens.d.ts.map