This change ensures that both the global version and the project version Node.js version requirements are met before the CLI executes a command. Previously an older global version of the CLI would allow a newer project version to execute even if the project version had more strict Node.js version requirements. The Node.js version is now checked twice. Once in an ES5 safe script to ensure that ancient Node.js versions are not in use. And secondly in the CLI entry code that is executed after global/project bootstrapping.
With this change we now check if the current CLI version is the latest published version. If it is not, we install a temporary version to run the `ng update` with.
Whenever an unhandled exception during command processing occurs, the message and stack trace will be saved to a debug log located in a temporary directory. The user will be informed of the log location as well as the exception message and instructions to file a bug report at the GitHub repository.
Node.js 10+ provides built-in functionality to test for color support based on chalk's `supports-color` package as well as several others. This alleviates the need for custom code or third-party packages to determine color support. In addition for this PR, the `ansi-colors` package is added to the CLI which provides color, cross-platform symbol, and style/color removal support. The package is light-weight, contains typings, and has no dependencies. The removal support is leveraged to remove all styling from logger messages when color is not supported. This removes a current defect in which color/styling is still displayed if generated manually or via methods that do not perform supportability checks. Finally, the typically used console functions are overriden to leverage the logger to ensure that the color processing is applied to third-party code (e.g., webpack internally as well as some of its loaders and plugins) which output to the console directly.
* fix(@angular-devkit/core): errors and warnings are hard to read in windows cmd
Closes#12755
* fix(@angular/cli): errors and warnings are hard to read in windows cmd
Closes#12755
