@unts/patch-package
Version:
Fix broken node modules with no fuss
248 lines • 30.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.executeEffects = void 0;
const fs_extra_1 = require("fs-extra");
const path_1 = require("path");
const assertNever_1 = require("../assertNever");
const executeEffects = (effects, { dryRun, bestEffort, errors, cwd, }) => {
const inCwd = (path) => (cwd ? (0, path_1.join)(cwd, path) : path);
const humanReadable = (path) => (0, path_1.relative)(process.cwd(), inCwd(path));
effects.forEach((eff) => {
switch (eff.type) {
case "file deletion":
if (dryRun) {
if (!(0, fs_extra_1.existsSync)(inCwd(eff.path))) {
throw new Error("Trying to delete file that doesn't exist: " +
humanReadable(eff.path));
}
}
else {
// TODO: integrity checks
try {
(0, fs_extra_1.unlinkSync)(inCwd(eff.path));
}
catch (e) {
if (bestEffort) {
errors === null || errors === void 0 ? void 0 : errors.push(`Failed to delete file ${eff.path}`);
}
else {
throw e;
}
}
}
break;
case "rename":
if (dryRun) {
// TODO: see what patch files look like if moving to exising path
if (!(0, fs_extra_1.existsSync)(inCwd(eff.fromPath))) {
throw new Error("Trying to move file that doesn't exist: " +
humanReadable(eff.fromPath));
}
}
else {
try {
(0, fs_extra_1.moveSync)(inCwd(eff.fromPath), inCwd(eff.toPath));
}
catch (e) {
if (bestEffort) {
errors === null || errors === void 0 ? void 0 : errors.push(`Failed to rename file ${eff.fromPath} to ${eff.toPath}`);
}
else {
throw e;
}
}
}
break;
case "file creation":
if (dryRun) {
if ((0, fs_extra_1.existsSync)(inCwd(eff.path))) {
throw new Error("Trying to create file that already exists: " +
humanReadable(eff.path));
}
// todo: check file contents matches
}
else {
const fileContents = eff.hunk
? eff.hunk.parts[0].lines.join("\n") +
(eff.hunk.parts[0].noNewlineAtEndOfFile ? "" : "\n")
: "";
const path = inCwd(eff.path);
try {
(0, fs_extra_1.ensureDirSync)((0, path_1.dirname)(path));
(0, fs_extra_1.writeFileSync)(path, fileContents, { mode: eff.mode });
}
catch (e) {
if (bestEffort) {
errors === null || errors === void 0 ? void 0 : errors.push(`Failed to create new file ${eff.path}`);
}
else {
throw e;
}
}
}
break;
case "patch":
applyPatch(eff, { dryRun, cwd, bestEffort, errors });
break;
case "mode change":
const currentMode = (0, fs_extra_1.statSync)(inCwd(eff.path)).mode;
if (((isExecutable(eff.newMode) && isExecutable(currentMode)) ||
(!isExecutable(eff.newMode) && !isExecutable(currentMode))) &&
dryRun) {
console.log(`Mode change is not required for file ${humanReadable(eff.path)}`);
}
(0, fs_extra_1.chmodSync)(inCwd(eff.path), eff.newMode);
break;
default:
(0, assertNever_1.assertNever)(eff);
}
});
};
exports.executeEffects = executeEffects;
function isExecutable(fileMode) {
// tslint:disable-next-line:no-bitwise
return (fileMode & 64) > 0;
}
const trimRight = (s) => s.replace(/\s+$/, "");
function linesAreEqual(a, b) {
return trimRight(a) === trimRight(b);
}
/**
* How does noNewLineAtEndOfFile work?
*
* if you remove the newline from a file that had one without editing other bits:
*
* it creates an insertion/removal pair where the insertion has \ No new line at end of file
*
* if you edit a file that didn't have a new line and don't add one:
*
* both insertion and deletion have \ No new line at end of file
*
* if you edit a file that didn't have a new line and add one:
*
* deletion has \ No new line at end of file
* but not insertion
*
* if you edit a file that had a new line and leave it in:
*
* neither insetion nor deletion have the annoation
*
*/
function applyPatch({ hunks, path }, { dryRun, cwd, bestEffort, errors, }) {
path = cwd ? (0, path_1.resolve)(cwd, path) : path;
// modifying the file in place
const fileContents = (0, fs_extra_1.readFileSync)(path).toString();
const mode = (0, fs_extra_1.statSync)(path).mode;
const fileLines = fileContents.split(/\n/);
const result = [];
for (const hunk of hunks) {
let fuzzingOffset = 0;
while (true) {
const modifications = evaluateHunk(hunk, fileLines, fuzzingOffset);
if (modifications) {
result.push(modifications);
break;
}
fuzzingOffset =
fuzzingOffset < 0 ? fuzzingOffset * -1 : fuzzingOffset * -1 - 1;
if (Math.abs(fuzzingOffset) > 20) {
const message = `Cannot apply hunk ${hunks.indexOf(hunk)} for file ${(0, path_1.relative)(process.cwd(), path)}\n\`\`\`diff\n${hunk.source}\n\`\`\`\n`;
if (bestEffort) {
errors === null || errors === void 0 ? void 0 : errors.push(message);
break;
}
else {
throw new Error(message);
}
}
}
}
if (dryRun) {
return;
}
let diffOffset = 0;
for (const modifications of result) {
for (const modification of modifications) {
switch (modification.type) {
case "splice":
fileLines.splice(modification.index + diffOffset, modification.numToDelete, ...modification.linesToInsert);
diffOffset +=
modification.linesToInsert.length - modification.numToDelete;
break;
case "pop":
fileLines.pop();
break;
case "push":
fileLines.push(modification.line);
break;
default:
(0, assertNever_1.assertNever)(modification);
}
}
}
try {
(0, fs_extra_1.writeFileSync)(path, fileLines.join("\n"), { mode });
}
catch (e) {
if (bestEffort) {
errors === null || errors === void 0 ? void 0 : errors.push(`Failed to write file ${path}`);
}
else {
throw e;
}
}
}
function evaluateHunk(hunk, fileLines, fuzzingOffset) {
const result = [];
let contextIndex = hunk.header.original.start - 1 + fuzzingOffset;
// do bounds checks for index
if (contextIndex < 0) {
return null;
}
if (fileLines.length - contextIndex < hunk.header.original.length) {
return null;
}
for (const part of hunk.parts) {
switch (part.type) {
case "deletion":
case "context":
for (const line of part.lines) {
const originalLine = fileLines[contextIndex];
if (!linesAreEqual(originalLine, line)) {
return null;
}
contextIndex++;
}
if (part.type === "deletion") {
result.push({
type: "splice",
index: contextIndex - part.lines.length,
numToDelete: part.lines.length,
linesToInsert: [],
});
if (part.noNewlineAtEndOfFile) {
result.push({
type: "push",
line: "",
});
}
}
break;
case "insertion":
result.push({
type: "splice",
index: contextIndex,
numToDelete: 0,
linesToInsert: part.lines,
});
if (part.noNewlineAtEndOfFile) {
result.push({ type: "pop" });
}
break;
default:
(0, assertNever_1.assertNever)(part.type);
}
}
return result;
}
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{\n  chmodSync,\n  ensureDirSync,\n  existsSync,\n  moveSync,\n  readFileSync,\n  statSync,\n  unlinkSync,\n  writeFileSync,\n} from \"fs-extra\"\nimport { dirname, join, relative, resolve } from \"path\"\nimport { assertNever } from \"../assertNever\"\nimport { FilePatch, Hunk, ParsedPatchFile } from \"./parse\"\n\nexport const executeEffects = (\n  effects: ParsedPatchFile,\n  {\n    dryRun,\n    bestEffort,\n    errors,\n    cwd,\n  }: { dryRun: boolean; cwd?: string; errors?: string[]; bestEffort: boolean },\n) => {\n  const inCwd = (path: string) => (cwd ? join(cwd, path) : path)\n  const humanReadable = (path: string) => relative(process.cwd(), inCwd(path))\n  effects.forEach((eff) => {\n    switch (eff.type) {\n      case \"file deletion\":\n        if (dryRun) {\n          if (!existsSync(inCwd(eff.path))) {\n            throw new Error(\n              \"Trying to delete file that doesn't exist: \" +\n                humanReadable(eff.path),\n            )\n          }\n        } else {\n          // TODO: integrity checks\n          try {\n            unlinkSync(inCwd(eff.path))\n          } catch (e) {\n            if (bestEffort) {\n              errors?.push(`Failed to delete file ${eff.path}`)\n            } else {\n              throw e\n            }\n          }\n        }\n        break\n      case \"rename\":\n        if (dryRun) {\n          // TODO: see what patch files look like if moving to exising path\n          if (!existsSync(inCwd(eff.fromPath))) {\n            throw new Error(\n              \"Trying to move file that doesn't exist: \" +\n                humanReadable(eff.fromPath),\n            )\n          }\n        } else {\n          try {\n            moveSync(inCwd(eff.fromPath), inCwd(eff.toPath))\n          } catch (e) {\n            if (bestEffort) {\n              errors?.push(\n                `Failed to rename file ${eff.fromPath} to ${eff.toPath}`,\n              )\n            } else {\n              throw e\n            }\n          }\n        }\n        break\n      case \"file creation\":\n        if (dryRun) {\n          if (existsSync(inCwd(eff.path))) {\n            throw new Error(\n              \"Trying to create file that already exists: \" +\n                humanReadable(eff.path),\n            )\n          }\n          // todo: check file contents matches\n        } else {\n          const fileContents = eff.hunk\n            ? eff.hunk.parts[0].lines.join(\"\\n\") +\n              (eff.hunk.parts[0].noNewlineAtEndOfFile ? \"\" : \"\\n\")\n            : \"\"\n          const path = inCwd(eff.path)\n          try {\n            ensureDirSync(dirname(path))\n            writeFileSync(path, fileContents, { mode: eff.mode })\n          } catch (e) {\n            if (bestEffort) {\n              errors?.push(`Failed to create new file ${eff.path}`)\n            } else {\n              throw e\n            }\n          }\n        }\n        break\n      case \"patch\":\n        applyPatch(eff, { dryRun, cwd, bestEffort, errors })\n        break\n      case \"mode change\":\n        const currentMode = statSync(inCwd(eff.path)).mode\n        if (\n          ((isExecutable(eff.newMode) && isExecutable(currentMode)) ||\n            (!isExecutable(eff.newMode) && !isExecutable(currentMode))) &&\n          dryRun\n        ) {\n          console.log(\n            `Mode change is not required for file ${humanReadable(eff.path)}`,\n          )\n        }\n        chmodSync(inCwd(eff.path), eff.newMode)\n        break\n      default:\n        assertNever(eff)\n    }\n  })\n}\n\nfunction isExecutable(fileMode: number) {\n  // tslint:disable-next-line:no-bitwise\n  return (fileMode & 0b001_000_000) > 0\n}\n\nconst trimRight = (s: string) => s.replace(/\\s+$/, \"\")\nfunction linesAreEqual(a: string, b: string) {\n  return trimRight(a) === trimRight(b)\n}\n\n/**\n * How does noNewLineAtEndOfFile work?\n *\n * if you remove the newline from a file that had one without editing other bits:\n *\n *    it creates an insertion/removal pair where the insertion has \\ No new line at end of file\n *\n * if you edit a file that didn't have a new line and don't add one:\n *\n *    both insertion and deletion have \\ No new line at end of file\n *\n * if you edit a file that didn't have a new line and add one:\n *\n *    deletion has \\ No new line at end of file\n *    but not insertion\n *\n * if you edit a file that had a new line and leave it in:\n *\n *    neither insetion nor deletion have the annoation\n *\n */\n\nfunction applyPatch(\n  { hunks, path }: FilePatch,\n  {\n    dryRun,\n    cwd,\n    bestEffort,\n    errors,\n  }: { dryRun: boolean; cwd?: string; bestEffort: boolean; errors?: string[] },\n): void {\n  path = cwd ? resolve(cwd, path) : path\n  // modifying the file in place\n  const fileContents = readFileSync(path).toString()\n  const mode = statSync(path).mode\n\n  const fileLines: string[] = fileContents.split(/\\n/)\n\n  const result: Modification[][] = []\n\n  for (const hunk of hunks) {\n    let fuzzingOffset = 0\n    while (true) {\n      const modifications = evaluateHunk(hunk, fileLines, fuzzingOffset)\n      if (modifications) {\n        result.push(modifications)\n        break\n      }\n\n      fuzzingOffset =\n        fuzzingOffset < 0 ? fuzzingOffset * -1 : fuzzingOffset * -1 - 1\n\n      if (Math.abs(fuzzingOffset) > 20) {\n        const message = `Cannot apply hunk ${hunks.indexOf(\n          hunk,\n        )} for file ${relative(process.cwd(), path)}\\n\\`\\`\\`diff\\n${\n          hunk.source\n        }\\n\\`\\`\\`\\n`\n\n        if (bestEffort) {\n          errors?.push(message)\n          break\n        } else {\n          throw new Error(message)\n        }\n      }\n    }\n  }\n\n  if (dryRun) {\n    return\n  }\n\n  let diffOffset = 0\n\n  for (const modifications of result) {\n    for (const modification of modifications) {\n      switch (modification.type) {\n        case \"splice\":\n          fileLines.splice(\n            modification.index + diffOffset,\n            modification.numToDelete,\n            ...modification.linesToInsert,\n          )\n          diffOffset +=\n            modification.linesToInsert.length - modification.numToDelete\n          break\n        case \"pop\":\n          fileLines.pop()\n          break\n        case \"push\":\n          fileLines.push(modification.line)\n          break\n        default:\n          assertNever(modification)\n      }\n    }\n  }\n\n  try {\n    writeFileSync(path, fileLines.join(\"\\n\"), { mode })\n  } catch (e) {\n    if (bestEffort) {\n      errors?.push(`Failed to write file ${path}`)\n    } else {\n      throw e\n    }\n  }\n}\n\ninterface Push {\n  type: \"push\"\n  line: string\n}\ninterface Pop {\n  type: \"pop\"\n}\ninterface Splice {\n  type: \"splice\"\n  index: number\n  numToDelete: number\n  linesToInsert: string[]\n}\n\ntype Modification = Push | Pop | Splice\n\nfunction evaluateHunk(\n  hunk: Hunk,\n  fileLines: string[],\n  fuzzingOffset: number,\n): Modification[] | null {\n  const result: Modification[] = []\n  let contextIndex = hunk.header.original.start - 1 + fuzzingOffset\n  // do bounds checks for index\n  if (contextIndex < 0) {\n    return null\n  }\n  if (fileLines.length - contextIndex < hunk.header.original.length) {\n    return null\n  }\n\n  for (const part of hunk.parts) {\n    switch (part.type) {\n      case \"deletion\":\n      case \"context\":\n        for (const line of part.lines) {\n          const originalLine = fileLines[contextIndex]\n          if (!linesAreEqual(originalLine, line)) {\n            return null\n          }\n          contextIndex++\n        }\n\n        if (part.type === \"deletion\") {\n          result.push({\n            type: \"splice\",\n            index: contextIndex - part.lines.length,\n            numToDelete: part.lines.length,\n            linesToInsert: [],\n          })\n\n          if (part.noNewlineAtEndOfFile) {\n            result.push({\n              type: \"push\",\n              line: \"\",\n            })\n          }\n        }\n        break\n      case \"insertion\":\n        result.push({\n          type: \"splice\",\n          index: contextIndex,\n          numToDelete: 0,\n          linesToInsert: part.lines,\n        })\n        if (part.noNewlineAtEndOfFile) {\n          result.push({ type: \"pop\" })\n        }\n        break\n      default:\n        assertNever(part.type)\n    }\n  }\n\n  return result\n}\n"]}