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Fixing dynamic require missing from webpack #6908

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merged 3 commits into from Jan 14, 2019

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thoov
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@thoov thoov commented Jan 11, 2019

Summary

When running yarn pack with a bundledDependency yarn was throwing
an error: An unexpected error occurred: "Cannot find module "."".

This was due to yarn's cli.js being transpiled to on line 110321:

var thePackage = !(function webpackMissingModule() { var e = new Error("Cannot find module \".\""); e.code = 'MODULE_NOT_FOUND'; throw e; }());

This line comes from https://github.com/stefanpenner/hash-for-dep/blob/e849d3e2f0350810716a0e504c84603362229570/lib/pkg.js#L20
and is a dynamic require. This commit impements a fix for this based on the guidence from webpack/webpack#4175 (comment)

This code was originally added with #5966

Test plan

Ran yarn build-bundle and then ran ./artifacts/yarn-XXX.js pack inside of a sample project to verify the error went away.

When running `yarn pack` with a bundledDependency yarn was throwing
an error: An unexpected error occurred: "Cannot find module \".\"".

This was due to yarn's cli.js being transpiled to on line 110321:

```
var thePackage = !(function webpackMissingModule() { var e = new Error("Cannot find module \".\""); e.code = 'MODULE_NOT_FOUND'; throw e; }());
```

This line comes from https://github.com/stefanpenner/hash-for-dep/blob/e849d3e2f0350810716a0e504c84603362229570/lib/pkg.js#L20
and is a dynamic require. This commit impements a fix for this based on the guidence from webpack/webpack#4175 (comment)

This code was originally added with yarnpkg#5966
@thoov
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thoov commented Jan 11, 2019

cc @stefanpenner

@arcanis arcanis merged commit 1aee520 into yarnpkg:master Jan 14, 2019
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arcanis commented Jan 14, 2019

Thanks 👍

cacheflow added a commit to cacheflow/yarn that referenced this pull request Feb 14, 2019
* master: (67 commits)
  Include key info for "expected hoisted" invariant (yarnpkg#7009)
  refactor: remove unnecessary checks (yarnpkg#6955)
  fix: drive letter casing for win32 pnp (yarnpkg#7007)
  Don’t call `release` with an exit code (yarnpkg#6981)
  Check os and platform even when engines is not present in package.json (yarnpkg#6976)
  Fix handling of non-offline errors (yarnpkg#6968)
  Treat the ignore-scripts in yarnrc as a synonym to the cli arg (yarnpkg#6983)
  fix(pnp): make sure pnp module is again the first preloaded module. (yarnpkg#6951)
  refactor: remove unused imports (yarnpkg#6956)
  Add 1.14.0 to changelog (yarnpkg#6967)
  1.15.0-0
  v1.14.0
  Fix suggested command after unlinking a package (yarnpkg#6931)
  Update CHANGELOG.md
  fix(pnp): make sure pnp module is the first preloaded module. (yarnpkg#6942)
  fix(pnp): make sure that the package locator is fetched with a trailing slash (yarnpkg#6882)
  Improve rendering of Chocolatey package description (yarnpkg#6899)
  Fixing dynamic require missing from webpack (yarnpkg#6908)
  feat(policies): Use github access token when requesting releases (yarnpkg#6912)
  Fixes PnP detection across workspaces (yarnpkg#6878)
  ...
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Hi! It seems yarn pack still produces "Cannot find module "."" for version v1.15.2 (installed via apt):

package.json:

{
  "name": "yarn-pack-test",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "aws-sdk": "^2.437.0"
  },
  "bundleDependencies": [
    "aws-sdk"
  ]
}
Error: Cannot find module "."
    at webpackMissingModule (/usr/share/yarn/lib/cli.js:110553:64)
    at pkg (/usr/share/yarn/lib/cli.js:110553:142)
    at again (/usr/share/yarn/lib/cli.js:110508:22)
    at depsFor (/usr/share/yarn/lib/cli.js:110522:4)
    at /usr/share/yarn/lib/cli.js:42203:30
    at Generator.next (<anonymous>)
    at step (/usr/share/yarn/lib/cli.js:304:30)
    at /usr/share/yarn/lib/cli.js:315:13
    at <anonymous>

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3 participants