Function readPatch

src/patch/read.ts:8–66

({
  patchFilePath,
  patchDetails,
  patchDir,
}: {
  patchFilePath: string
  patchDetails: PackageDetails
  patchDir: string
})

import { parsePatchFile, PatchFilePart } from "./parse"

export function readPatch({
  patchFilePath,
  patchDetails,
  patchDir,
}: {
  patchFilePath: string
  patchDetails: PackageDetails
  patchDir: string
}): PatchFilePart[] {
  try {
    return parsePatchFile(readFileSync(patchFilePath).toString())
  } catch (e) {
    const fixupSteps: string[] = []
    const relativePatchFilePath = normalize(
      relative(process.cwd(), patchFilePath),
    )
    const patchBaseDir = relativePatchFilePath.slice(
      0,
      relativePatchFilePath.indexOf(patchDir),
    )
    if (patchBaseDir) {
      fixupSteps.push(`cd ${patchBaseDir}`)
    }
    fixupSteps.push(
      `patch -p1 -i ${relativePatchFilePath.slice(
        relativePatchFilePath.indexOf(patchDir),
      )}`,
    )
    fixupSteps.push(`npx patch-package ${patchDetails.pathSpecifier}`)
    if (patchBaseDir) {
      fixupSteps.push(
        `cd ${relative(resolve(process.cwd(), patchBaseDir), process.cwd())}`,
      )
    }

    console.log(`
${chalk.red.bold("**ERROR**")} ${chalk.red(
      `Failed to apply patch for package ${chalk.bold(
        patchDetails.humanReadablePathSpecifier,
      )}`,
    )}
    
  This happened because the patch file ${relativePatchFilePath} could not be parsed.
   
  If you just upgraded patch-package, you can try running:
  
    ${fixupSteps.join("\n    ")}
    
  Otherwise, try manually creating the patch file again.
  
  If the problem persists, please submit a bug report:
  
    https://github.com/ds300/patch-package/issues/new?title=Patch+file+parse+error&body=%3CPlease+attach+the+patch+file+in+question%3E

`)
    process.exit(1)
  }
  return []