This pull request introduces a new exception, HttpResponseLengthExceedException, to enforce a maximum allowed HTTP response size in the RepositoryProvider class. It also enhances the SysEnv utility to support retrieving integer and long environment variables, and adds comprehensive unit tests for these changes.

New Exception Handling for HTTP Response Size:

• New Exception Class: Added HttpResponseLengthExceedException to handle cases where an HTTP response exceeds a configurable maximum size. (modules/nextflow/src/main/groovy/nextflow/exception/HttpResponseLengthExceedException.groovy)
• Integration in RepositoryProvider:
  • Introduced the checkMaxLength method in RepositoryProvider to validate the Content-Length header of HTTP responses against the environment variable NXF_GIT_RESPONSE_MAX_LENGTH. (modules/nextflow/src/main/groovy/nextflow/scm/RepositoryProvider.groovy) [1] [2]
  • Updated imports to include the new exception. (modules/nextflow/src/main/groovy/nextflow/scm/RepositoryProvider.groovy)

Enhancements to SysEnv Utility:

• New Methods: Added getInteger and getLong methods to retrieve integer and long values from environment variables with optional default values. (modules/nf-commons/src/main/nextflow/SysEnv.groovy)

Unit Tests:

• Testing checkMaxLength: Added unit tests to validate the behavior of checkMaxLength under various scenarios, including when the maximum length is disabled, not set, or exceeded. (modules/nextflow/src/test/groovy/nextflow/scm/RepositoryProviderTest.groovy)
• Testing SysEnv Enhancements: Added unit tests for the new getInteger and getLong methods to ensure correct parsing of environment variables. (modules/nf-commons/src/test/nextflow/SysEnvTest.groovy)