Cross-platform utility scripts on Windows #16846

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Current behavior

Utility scripts (including Windows-specific scripts/windows/*) are not cross-platform, they are shell scripts and require *nix-like environment.

It is possible to run some scripts (test.sh, scripts/windows/*.sh) with Bash that comes with Git for Windows (which contains stripped-down MSYS and is a prerequisite):

"c:\PortableGit\bin\bash.exe" ./test.sh

Other scripts (build.sh) cannot be run with Bash from Git for Windows because they rely on *nix-like environment and require full MinGW installation (which isn't a prerequisite and works by a lucky chance):

# fails due to CRLF and numerous problems with Windows paths
c:\cygwin\bin\bash.exe build.sh 

# fails with `rsync: command not found` error
c:\PortableGit\bin\bash.exe build.sh 

# succeeds
c:\MinGW\msys\1.0\bin\bash.exe ./build.sh 

Expected behavior
Utility scripts are cross-platform and can be executed on Windows as .bat/.cmd files and/or Gulp tasks.

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Current scripts aren't cross-platform and don't match the requirements for building and testing on Windows.

Please tell us about your environment:

Windows 7 x64
Node 6.10.3
NPM 3.10.10
git 2.9.0.windows.1

• Angular version: 4.2.0-beta.1