Developing on windows has a broken workflow (or contributing instructions incorrect)

[lukeapage]

Current behavior

I'm running windows and git bash.
I've followed the contributing instructions and set script-shell to git bash also.
The install completes without errors but yarn start:

MINGW64 /c/git/cypress (develop)
$ yarn
yarn install v1.22.0
[1/5] Validating package.json...
[2/5] Resolving packages...
success Already up-to-date.
$ ./scripts/run-if-not-ci.sh yarn build
Done in 3.05s.

MINGW64 /c/git/cypress (develop)
$ yarn start
yarn run v1.22.0
$ yarn ensure-deps
$ ./scripts/ensure-dependencies.sh
warning Integrity check: Top level patterns don't match
error Integrity check failed
error Found 1 errors.
info Visit https://yarnpkg.com/en/docs/cli/check for documentation about this command.
Your dependencies are out of date; installing the correct dependencies...
[1/5] Validating package.json...
[2/5] Resolving packages...
success Already up-to-date.
$ ./scripts/run-if-not-ci.sh yarn build
$ node $(yarn bin cypress) open --dev --global
C:\git\cypress\node_modules\.bin\cypress:2
basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
          ^^^^^^^

SyntaxError: missing ) after argument list
    at wrapSafe (internal/modules/cjs/loader.js:1071:16)
    at Module._compile (internal/modules/cjs/loader.js:1121:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1177:10)
    at Module.load (internal/modules/cjs/loader.js:1001:32)
    at Function.Module._load (internal/modules/cjs/loader.js:900:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at internal/main/run_main_module.js:18:47
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I changed the package.json start command to yarn cypress open --dev --global
and it fails:

$ yarn start
yarn run v1.22.0
$ yarn ensure-deps
$ ./scripts/ensure-dependencies.sh
warning Integrity check: Top level patterns don't match
error Integrity check failed
error Found 1 errors.
info Visit https://yarnpkg.com/en/docs/cli/check for documentation about this command.
Your dependencies are out of date; installing the correct dependencies...
[1/5] Validating package.json...
[2/5] Resolving packages...
success Already up-to-date.
$ ./scripts/run-if-not-ci.sh yarn build
$ yarn cypress open --dev --global
$ C:\git\cypress\node_modules\.bin\cypress open --dev --global
/usr/bin/bash: C:gitcypressnode_modules.bincypress: command not found
error Command failed with exit code 127.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 127.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I now removed the script-shell config - now it succeeds and opens but its an empty project - I thought it would show the cypress spec files?

I also tried with the original yarn start command and no script-shell set - that fails too:

$ yarn start
yarn run v1.22.0
$ yarn ensure-deps
$ ./scripts/ensure-dependencies.sh
$ node $(yarn bin cypress) open --dev --global
internal/modules/cjs/loader.js:984
  throw err;
  ^

Error: Cannot find module 'C:\git\cypress\$(yarn'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:981:15)
    at Function.Module._load (internal/modules/cjs/loader.js:863:27)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at internal/main/run_main_module.js:18:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I resolved it in the end by having yarn start be cypress open --dev --global and then selecting the package I want to test and not setting script-shell

[flotwig]

Also running into this on Windows. I can open Cypress via node ./scripts/cypress.js open, but not via yarn cypress:open, I get the same error as OP #3.

[sainthkh]

It didn't happen to me on Windows with 5.5.0. I can run Cypress with yarn cypress:open inside packages/driver folder.

[lukeapage]

I was running from the root folder

[cypress-bot]

The code for this is done in cypress-io/cypress#15492, but has yet to be released.
We'll update this issue and reference the changelog when it's released.