"Error: Cannot find module 'webpack'" on preview

[iwikal]

🐛 Bug Report

I tried to follow this guide: https://developers.cloudflare.com/workers/platform/sites/start-from-scratch

Environment

• operating system: Linux 5.9.14-arch1-1 x86_64
• output of rustc -V: rustc 1.50.0-nightly (11c94a197 2020-12-21)
• output of node -v: v10.23.0
• output of wrangler -V: 👷 ✨ wrangler 1.12.3
• contents of wrangler.toml:

name = "foo"
type = "webpack"
account_id = "redacted"
workers_dev = true
route = ""
zone_id = "redacted"

[site]
bucket = "./public"

Steps to reproduce

• wrangler generate --site foo
• cd foo
• Enter account and zone ID
• wrangler preview --watch

What did you expect to see?

A preview of the provided index.html

What did you see instead?

added 4 packages from 5 contributors and audited 4 packages in 1.034s
found 0 vulnerabilities

internal/modules/cjs/loader.js:638
    throw err;
    ^

Error: Cannot find module 'webpack'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
    at Function.Module._load (internal/modules/cjs/loader.js:562:25)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at Object.<anonymous> (/home/joenor/.cache/.wrangler/wranglerjs-1.12.3/index.js:1:17)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
Error: failed to execute `"/usr/bin/node" "/home/joenor/.cache/.wrangler/wranglerjs-1.12.3" "--output-file=/tmp/.wranglerjs_outputB6oBp" "--wasm-binding=wasm" "--no-webpack-config=1" "--use-entry=/tmp/blah/workers-site/index.js"`: exited with exit code: 1

[xtuc]

How did you install wrangler? using npm or cargo?
Also do you have npm on your machine?

[iwikal]

❯ npm --version
6.13.6

This happened both when I installed wrangler through yarn global add @cloudflare/wrangler and when I used cargo install wrangler.

[xtuc]

do you have node_modules in /home/joenor/.cache/.wrangler/wranglerjs-1.12.3?

[iwikal]

Yes, and it contains a webpack module.

[0x15f]

Running into the same issue using the cloudflare/wrangler-action (Wrangler 1.14.1) with GitHub Actions. Trace below

/usr/bin/docker run --name e478d2379fc5c846f8ba82b651625ce8d5_098a67 --label 5588e4 --workdir /github/workspace --rm -e INPUT_APITOKEN -e INPUT_APIKEY -e INPUT_EMAIL -e INPUT_ENVIRONMENT -e INPUT_WORKINGDIRECTORY -e INPUT_WRANGLERVERSION -e INPUT_SECRETS -e INPUT_PRECOMMANDS -e INPUT_POSTCOMMANDS -e INPUT_PUBLISH -e HOME -e GITHUB_JOB -e GITHUB_REF -e GITHUB_SHA -e GITHUB_REPOSITORY -e GITHUB_REPOSITORY_OWNER -e GITHUB_RUN_ID -e GITHUB_RUN_NUMBER -e GITHUB_RETENTION_DAYS -e GITHUB_ACTOR -e GITHUB_WORKFLOW -e GITHUB_HEAD_REF -e GITHUB_BASE_REF -e GITHUB_EVENT_NAME -e GITHUB_SERVER_URL -e GITHUB_API_URL -e GITHUB_GRAPHQL_URL -e GITHUB_WORKSPACE -e GITHUB_ACTION -e GITHUB_EVENT_PATH -e GITHUB_ACTION_REPOSITORY -e GITHUB_ACTION_REF -e GITHUB_PATH -e GITHUB_ENV -e RUNNER_OS -e RUNNER_TOOL_CACHE -e RUNNER_TEMP -e RUNNER_WORKSPACE -e ACTIONS_RUNTIME_URL -e ACTIONS_RUNTIME_TOKEN -e ACTIONS_CACHE_URL -e GITHUB_ACTIONS=true -e CI=true -v "/var/run/docker.sock":"/var/run/docker.sock" -v "/home/runner/work/_temp/_github_home":"/github/home" -v "/home/runner/work/_temp/_github_workflow":"/github/workflow" -v "/home/runner/work/_temp/_runner_file_commands":"/github/file_commands" -v "/home/runner/work/dimebeauty-discount-worker/dimebeauty-discount-worker":"/github/workspace" 5588e4:78d2379fc5c846f8ba82b651625ce8d5
Using API Token authentication
/usr/local/bin/wrangler -> /usr/local/lib/node_modules/@cloudflare/wrangler/run-wrangler.js

> @cloudflare/wrangler@1.14.1 postinstall /usr/local/lib/node_modules/@cloudflare/wrangler
> node ./install-wrangler.js

Downloading release from https://workers.cloudflare.com/get-npm-wrangler-binary/1.14.1/x86_64-unknown-linux-musl
wrangler has been installed!
+ @cloudflare/wrangler@1.14.1
added 23 packages from 10 contributors in 2.954s
added 18 packages from 49 contributors and audited 18 packages in 1.05s
found 0 vulnerabilities

  Installing wranglerjs v1.14.1...
internal/modules/cjs/loader.js:818
  throw err;
  ^

Error: Cannot find module 'webpack'
Require stack:
- /github/workspace/.cache/.wrangler/wranglerjs-1.14.1/index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
    at Function.Module._load (internal/modules/cjs/loader.js:667:27)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/github/workspace/.cache/.wrangler/wranglerjs-1.14.1/index.js:1:17)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/github/workspace/.cache/.wrangler/wranglerjs-1.14.1/index.js' ]
}
Error: failed to execute `"/usr/local/bin/node" "/github/workspace/.cache/.wrangler/wranglerjs-1.14.1" "--output-file=/tmp/.wranglerjs_outputqBrxG" "--wasm-binding=WASM_MODULE" "--no-webpack-config=1" "--use-entry=/github/workspace/index.js"`: exited with exit code: 1

[boemekeld]

I have the same problem (with wrangler-action). It started today (at Wrangler 1.14.1).

[jefflaporte]

Same problem for me at 1.14.1, 1.14.0. Going back to version 1.13.0 works.

[mattlebel]

Solved for me via changing to version 1.13.0

GitHub Actions syntax here from @jasikpark cloudflare/wrangler-action#50 (comment)

[jasikpark]

Hmmm... 1.14.1 claims to roll back the problematic changes, but I'm still getting an error in my Github Action:

found 0 vulnerabilities

  Installing wranglerjs v1.14.1...
internal/modules/cjs/loader.js:818
  throw err;
  ^

Error: Cannot find module 'webpack/lib/wasm/WasmMainTemplatePlugin'
Require stack:
- /github/workspace/.cache/.wrangler/wranglerjs-1.14.1/index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
    at Function.Module._load (internal/modules/cjs/loader.js:667:27)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/github/workspace/.cache/.wrangler/wranglerjs-1.14.1/index.js:4:32)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/github/workspace/.cache/.wrangler/wranglerjs-1.14.1/index.js' ]
}
Error: failed to execute `"/usr/local/bin/node" "/github/workspace/.cache/.wrangler/wranglerjs-1.14.1" "--output-file=/tmp/.wranglerjs_outputzPWAh" "--wasm-binding=WASM_MODULE" "--webpack-config=webpack.config.js"`: exited with exit code: 1

[xtuc]

I just noticed that that import isn't used anymorehttps://github.com/cloudflare/wrangler/blob/c6b61cd892b1ce191f337b61b3622b3e6ad192ff/wranglerjs/index.js#L4. Could you please send a PR to remove it?

[jasikpark]

@xtuc tada #1802

[jasikpark]

Interestingly yarn add --dev --exact @cloudflare/wrangler installs and runs fine for me.

[calendee]

So this is how I fixed it because nothing else worked (installing wrangler in local project, installing wrangler globally, etc).

cd ~/Library/Caches/.wrangler/wranglerjs-1.15.0
yarn

This installed webpack because it's a dependency in the package.json.

After that, wrangler dev worked just fine.

[hamzahsn]

Perhaps you need to give the path to your webpack config by setting: webpack_config = "/path/worker/config/worker.webpack.js"

[stale]

This issue has been automatically marked as stale because it has not had recent activity in the last 180 days. It will be closed if no further activity occurs in the next week. Please feel free to comment if you'd like it to remain open, and thank you for your contributions.

[stale]

This issue has been automatically closed because it has not had recent activity. You may re-open the issue if it is still relevant.