Unable to build on Windows 10

🐞 bug report

Affected Package

The issue is caused by package @angular/....

scripts/build, bazel

Is this a regression?

Yes, the previous version in which this bug was not present was: ....

Description

A clear and concise description of the problem...

While issuing node ./scripts/build/build-packages-dist.js, the build getting failed.

🔬 Minimal Reproduction

https://stackblitz.com/...

🔥 Exception or Error

PS D:\OpenSource\angular> node ./scripts/build/build-packages-dist.js >>  buil_error.txt
INFO: Repository npm instantiated at:
  D:/opensource/angular/WORKSPACE:30:13: in <toplevel>
  C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/index.bzl:78:18: in yarn_install
Repository rule yarn_install defined at:
  C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl:652:31: in <toplevel>
DEBUG: C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl:342:14: _
DEBUG: C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl:343:14: <unknown object com.google.devtools.build.lib.bazel.repository.starlark.StarlarkExecutionResult>
ERROR: An error occurred during the fetch of repository 'npm':
   Traceback (most recent call last):
        File "C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl", line 618, column 15, in _yarn_install_impl
                _copy_file(repository_ctx, repository_ctx.attr.package_json)
        File "C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl", line 345, column 17, in _copy_file
                fail("mkdir -p %s failed: \nSTDOUT:\n%s\nSTDERR:\n%s" % (dirname, result.stdout, result.stderr))
Error in fail: mkdir -p _ failed:
STDOUT:

STDERR:
java.io.IOException: ERROR: src/main/native/windows/process.cc(202): CreateProcessW("mkdir" -p _): The system cannot find the file specified.     
 (error: 2)
ERROR: Error fetching repository: Traceback (most recent call last):
        File "C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl", line 618, column 15, in _yarn_install_impl
                _copy_file(repository_ctx, repository_ctx.attr.package_json)
        File "C:/users/anusername/_bazel_anusername/idexbm2i/external/build_bazel_rules_nodejs/internal/npm_install/npm_install.bzl", line 345, column 17, in _copy_file
                fail("mkdir -p %s failed: \nSTDOUT:\n%s\nSTDERR:\n%s" % (dirname, result.stdout, result.stderr))
Error in fail: mkdir -p _ failed:
STDOUT:

STDERR:
java.io.IOException: ERROR: src/main/native/windows/process.cc(202): CreateProcessW("mkdir" -p _): The system cannot find the file specified.     
 (error: 2)
ERROR: no such package '@npm//@bazel/protractor': mkdir -p _ failed: 
STDOUT:

STDERR:
java.io.IOException: ERROR: src/main/native/windows/process.cc(202): CreateProcessW("mkdir" -p _): The system cannot find the file specified.     
 (error: 2)
child_process.js:655
    throw err;
    ^

Error: Command failed: yarn --cwd "D:\OpenSource\angular" --silent bazel info bazel-bin
    at checkExecSyncError (child_process.js:616:11)
    at execSync (child_process.js:652:15)
    at exec (D:\OpenSource\angular\scripts\build\package-builder.js:132:18)
    at Object.<anonymous> (D:\OpenSource\angular\scripts\build\package-builder.js:40:18)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Module.require (internal/modules/cjs/loader.js:952:19)
    at require (internal/modules/cjs/helpers.js:88:18) {
  status: 1,
  signal: null,
  output: [ null, Buffer(0) [Uint8Array] [], null ],
  pid: 15276,
  stdout: Buffer(0) [Uint8Array] [],
  stderr: null
}

🌍 Your Environment

Angular Version:

Anything else relevant?

Windows 10 Pro. Build: 19042.867

[petebacondarwin]

OK, so I pulled the latest master, did a full git clean -xfd, ensure I was on the correct yarn and node versions. Then ran yarn and finally node scripts\build\build-packages-dist.js, and the script completed successfully.

Although I had the C:\msys64\usr\bin in my user PATH, it wasn’t appearing when I ran PATH from the command line, so I added it to the system PATH. So my PATH now contains:

C:\WINDOWS\system32;
C:\WINDOWS;
C:\WINDOWS\System32\Wbem;
C:\WINDOWS\System32\WindowsPowerShell\v1.0\;
C:\WINDOWS\System32\OpenSSH\;
C:\Users\Admin\AppData\Roaming\nvm;
C:\Program Files\nodejs;
C:\Program Files\Git\cmd;
C:\msys64\usr\bin;
C:\Users\Admin\.windows-build-tools\python27\;
C:\Users\Admin\AppData\Local\Programs\Microsoft VS Code\bin;
C:\Users\Admin\AppData\Local\Microsoft\WindowsApps;

[petebacondarwin]

Can you try adding C:\msys64\usr\bin to your PATH? I was getting the same problem as this. It turned out that despite having setup BAZEL_SH to correctly point to the msys2 bash program, the PATH was not allowing the scripts being run in that shell to access the relevant tools, such as mkdir.