Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 | 54x 54x 54x 54x 924x 924x 924x 924x 924x 908x 908x 908x 210856x 210856x 210856x 210856x 210856x 210856x 396955034x 210856x 396744178x 1694268x 396744178x 396744178x 12742749x 12742749x 384001429x 396744178x 105548x 105548x 105548x 288x 105260x 105260x 105260x 105260x 16x 44x 16x 105260x 105260x 105260x 5375x 99885x 99885x 99885x 99885x 99885x 99885x 105260x 105260x 105260x 900x 900x 900x 105260x 18x 105242x 48x 48x 48x 48x 48x 48x 48x 48x 210852x 210852x 467x 210852x 332x 210520x 804x 804x 4280x 4280x 4280x 4280x 48536x 48536x 4280x 804x 796x 796x 796x 8x 8x 4x 4x 4x 4x 4x 4x 32x 32x 24x | import { readFileSync } from "node:fs";
import { readFile } from "node:fs/promises";
import { dirname, resolve } from "node:path";
import {
allGeneratedPositionsFor,
LEAST_UPPER_BOUND,
originalPositionFor,
type TraceMap,
type Needle,
type SourceMapSegment,
type DecodedSourceMap,
type SourceMap,
sourceContentFor,
} from "@jridgewell/trace-mapping";
import { type Node } from "estree";
import { getIgnoredLines } from "./ignore-hints";
const WORD_PATTERN = /(\w+|\s|[^\w\s])/g;
const INLINE_MAP_PATTERN = /#\s*sourceMappingURL=(.*)\s*$/m;
const BASE_64_PREFIX = "data:application/json;base64,";
/** How often should offset calculations be cached */
const CACHE_THRESHOLD = 250;
type Filename = string;
export class Locator {
#cache = new Map<number, Needle>();
#codeParts: string[];
#map: TraceMap;
#directory: string;
#ignoredLines = new Map<Filename, ReturnType<typeof getIgnoredLines>>();
constructor(code: string, map: TraceMap, directory: string) {
this.#codeParts = code.split("");
this.#map = map;
this.#directory = directory;
}
reset() {
this.#cache.clear();
this.#ignoredLines.clear();
this.#codeParts = [];
}
offsetToNeedle(offset: number): Needle {
const closestThreshold = Math.floor(offset / CACHE_THRESHOLD) * CACHE_THRESHOLD;
const cacheHit = this.#cache.get(closestThreshold);
let current = cacheHit ? closestThreshold : 0;
let line = cacheHit?.line ?? 1;
let column = cacheHit?.column ?? 0;
for (let i = current; i <= this.#codeParts.length; i++) {
if (current === offset) {
return { line, column };
}
if (current % CACHE_THRESHOLD === 0) {
this.#cache.set(current, { line, column });
}
const char = this.#codeParts[i];
if (char === "\n") {
line++;
column = 0;
} else {
column++;
}
current++;
}
return { line, column };
}
getLoc(node: Pick<Node, "start" | "end">) {
const startNeedle = this.offsetToNeedle(node.start);
const start = getPosition(startNeedle, this.#map);
if (start === null) {
// Does not exist in source maps, e.g. generated code
return null;
}
// End-mapping tracing logic from istanbul-lib-source-maps
const endNeedle = this.offsetToNeedle(node.end);
endNeedle.column -= 1;
let end = getPosition(endNeedle, this.#map);
if (end === null) {
// search the previous lines as the mapping was not found on the same line
// e.g. tsc that doesnt include } in source maps
for (let line = endNeedle.line; line >= startNeedle.line && end === null; line--) {
end = getPosition({ line, column: Infinity }, this.#map);
}
// Does not exist in source maps, e.g. generated code
Iif (end === null) return null;
}
const loc = { start, end };
const afterEndMappings = allGeneratedPositionsFor(this.#map, {
source: loc.end.filename,
line: loc.end.line,
column: loc.end.column + 1,
bias: LEAST_UPPER_BOUND,
});
if (afterEndMappings.length === 0) {
loc.end.column = Infinity;
} else {
for (const mapping of afterEndMappings) {
Iif (mapping.line === null) continue;
const original = originalPositionFor(this.#map, mapping);
Eif (original.line === loc.end.line) {
loc.end = { ...original, filename: original.source! };
break;
}
}
}
const filename = loc.start.filename;
let ignoredLines = this.#ignoredLines.get(filename);
if (!ignoredLines) {
const sources = sourceContentFor(this.#map, filename);
ignoredLines = getIgnoredLines(sources ?? tryReadFileSync(filename));
this.#ignoredLines.set(filename, ignoredLines);
}
// Anything that starts between the line ignore hints is ignored
if (ignoredLines.has(loc.start.line)) {
return null;
}
return loc;
}
getSourceLines(loc: { start: Needle; end: Needle }, filename: string) {
const index = this.#map.resolvedSources.findIndex(
(source) => source === filename || resolve(this.#directory, source) === filename,
);
const sourcesContent = this.#map.sourcesContent?.[index];
Iif (sourcesContent == null) {
return null;
}
const lines = sourcesContent.split("\n").slice(loc.start.line - 1, loc.end.line);
lines[0] = lines[0].slice(loc.start.column);
// eslint-disable-next-line e18e/prefer-array-at -- https://github.com/e18e/eslint-plugin/issues/27
lines[lines.length - 1] = lines[lines.length - 1].slice(0, loc.end.column);
return lines.join("\n");
}
}
function getPosition(needle: Needle, map: TraceMap) {
let position = originalPositionFor(map, needle);
if (position.source == null) {
position = originalPositionFor(map, {
column: needle.column,
line: needle.line,
bias: LEAST_UPPER_BOUND,
});
}
if (position.source == null) {
return null;
}
return {
line: position.line,
column: position.column,
filename: position.source,
};
}
export function createEmptySourceMap(filename: string, code: string): DecodedSourceMap {
const mappings: SourceMapSegment[][] = [];
// Identical mappings as "magic-string"'s { hires: "boundary" }
for (const [line, content] of code.split("\n").entries()) {
const parts = content.match(WORD_PATTERN) || [];
const segments: SourceMapSegment[] = [];
let column = 0;
for (const part of parts) {
segments.push([column, 0, line, column]);
column += part.length;
}
mappings.push(segments);
}
return {
version: 3,
mappings,
file: filename,
sources: [filename],
sourcesContent: [code],
names: [],
};
}
export async function getInlineSourceMap(filename: string, code: string) {
const matches = code.match(INLINE_MAP_PATTERN);
const match = matches?.[1];
if (!match) return null;
try {
if (match.includes(BASE_64_PREFIX)) {
const encoded = match.split(BASE_64_PREFIX).at(-1) || "";
const decoded = atob(encoded);
return JSON.parse(decoded) as SourceMap;
}
const directory = dirname(filename);
const content = await readFile(resolve(directory, match), "utf-8");
return JSON.parse(content) as SourceMap;
} catch {
return null;
}
}
function tryReadFileSync(filename: string) {
try {
return readFileSync(filename, "utf8");
} catch {
return undefined;
}
}
|