Call external command without output to standard out/err.

Call external command and output to standard out/err.

Call external command and return the output string.

A contextual help error not only provides the error message, but also a suggestion for user to correct them in the next command for example, when command fails to find necessary files in the workspace, an actionable error will be helpful to remind the user double check the workspace, or specify a different one with dedicated flag.

Download file from http(s) or local disk Use http:// https:// as prefix for remote file Use file:// or no prefix for local file.

check if a debug flag exists.

Check if the path is an absolute path The standard go function does not support Windows :(.

load all debug flags into DebugFlags struct.

Load file from http(s) or local disk Use http:// https:// as prefix for remote file Use file:// or no prefix for local file.

Load a file from a http(s) url.