next export adds all hot-update files

[iamstarkov]

Bug report

all in a title; details are below

Describe the bug

if you develop next.js site for awhile and then run next export in the out folder you will get a lot of hot-update files in an out folder, which are required only for development and redundant for prod

That makes now deployment pretty slow, I unexpectedly got 248 files to deploy for my next-js based version of a blog.

To Reproduce

curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/basic-export
cd basic-export/
atom . # or vim .
yarn
yarn dev
# open http://localhost:3000
# change ./pages/index.js few times
# make sure to get few hot updates
# stop
yarn build
yarn export
tree out/ | grep hot
tree out/ | grep hot | wc -l # 16

full log

~/projects/oss

☯ curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/basic-export

% Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

Dload  Upload   Total   Spent    Left  Speed

100 1766k    0 1766k    0     0   849k      0 --:--:--  0:00:02 --:--:--  849k
~/projects/oss

☯ cd basic-export/
~/projects/oss/basic-export

☯ atom .
~/projects/oss/basic-export

☯ yarn

yarn install v1.9.4

info No lockfile found.

[1/4] 🔍  Resolving packages...

[2/4] 🚚  Fetching packages...

[3/4] 🔗  Linking dependencies...

[4/4] 📃  Building fresh packages...

success Saved lockfile.

✨  Done in 15.50s.
~/projects/oss/basic-export

☯ yarn dev

yarn run v1.9.4

$ next

✔ success server compiled in 163ms

✔ success client compiled in 838ms
DONE  Compiled successfully in 1658ms                                                        16:06:03

Ready on http://localhost:3000

WAIT  Compiling...                                                                           16:06:03
✔ success client compiled in 64ms
DONE  Compiled successfully in 122ms                                                         16:06:03

Building page: /

WAIT  Compiling...                                                                           16:06:46
✔ success server compiled in 1s 190ms

✔ success client compiled in 1s 344ms
DONE  Compiled successfully in 1377ms                                                        16:06:48
WAIT  Compiling...                                                                           16:07:27
✔ success server compiled in 236ms

✔ success client compiled in 224ms
DONE  Compiled successfully in 304ms                                                         16:07:27
WAIT  Compiling...                                                                           16:07:31
✔ success client compiled in 164ms
DONE  Compiled successfully in 192ms                                                         16:07:32
✔ success server compiled in 227ms
WAIT  Compiling...                                                                           16:07:37
✔ success client compiled in 124ms
DONE  Compiled successfully in 154ms                                                         16:07:37
✔ success server compiled in 198ms
WAIT  Compiling...                                                                           16:07:38
✔ success client compiled in 200ms
DONE  Compiled successfully in 225ms                                                         16:07:39
✔ success server compiled in 263ms
WAIT  Compiling...                                                                           16:07:40
✔ success client compiled in 195ms
DONE  Compiled successfully in 220ms                                                         16:07:40
✔ success server compiled in 265ms

^C

got signal SIGINT, exiting
~/projects/oss/basic-export

☯ yarn build

yarn run v1.9.4

$ next build

[16:08:18] Compiling client

[16:08:18] Compiling server

[16:08:19] Compiled server in 969ms

[16:08:23] Compiled client in 5s

✨  Done in 7.03s.
~/projects/oss/basic-export

☯ yarn export

yarn run v1.9.4

$ next export

using build directory: /Users/vlasta/projects/oss/basic-export/.next

copying "static build" directory

No "exportPathMap" found in "next.config.js". Generating map from "./pages"

exporting path: /about

exporting path: /about2

exporting path: /day

exporting path: /index

exporting path: /404

exporting path: /

Export successful

✨  Done in 0.64s.
~/projects/oss/basic-export

☯ tree out/ | grep hot

│           ├── 23406fc088aa2cd5d5cc.hot-update.json

│           ├── 63ab2713fe0a0c0ca18a.hot-update.json

│           ├── 8a557812ce01101491df.hot-update.json

│           ├── 9fba8f1c8050faa909b4.hot-update.json

│           ├── a06dadb8d20686abb97f.hot-update.json

│           ├── b2b8fb449294bf75a044.hot-update.json

│                       ├── index.js.23406fc088aa2cd5d5cc.hot-update.js

│                       ├── index.js.23406fc088aa2cd5d5cc.hot-update.js.map

│                       ├── index.js.63ab2713fe0a0c0ca18a.hot-update.js

│                       ├── index.js.63ab2713fe0a0c0ca18a.hot-update.js.map

│                       ├── index.js.8a557812ce01101491df.hot-update.js

│                       ├── index.js.8a557812ce01101491df.hot-update.js.map

│                       ├── index.js.9fba8f1c8050faa909b4.hot-update.js

│                       ├── index.js.9fba8f1c8050faa909b4.hot-update.js.map

│                       ├── index.js.b2b8fb449294bf75a044.hot-update.js

│                       └── index.js.b2b8fb449294bf75a044.hot-update.js.map
~/projects/oss/basic-export

☯ tree out/ | grep hot | wc -l

16

Expected behavior

out folder should not have dev-only files, like hot-update files

Screenshots

System information

• OS: macOS 10.14 (18A391)
• Version of Next.js: 7.0.2

[iamstarkov]

Workaround is to adjust export script:

// package.json
  scripts: {
    "export": "rm -rf .next out && next build && next export"
  }

[andersonleite]

PR
#6003

[timneutkens]

Closing this in favor of #6009

[balazsorban44]

This issue has been automatically locked due to no recent activity. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.