Add setup:system_data_dir() and OS env override support#68
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Add setup:system_data_dir() and OS env override support#68
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The
setup:system_data_dir()function is synonymous withsetup:data_dir(), unless thesystem_data_direnv is set specifically. This allows for separating "system-level" read-only data and application-level data in platform-like products.Also, an os-level override function is added, such that the
home,data_dir,system_data_dirand/orlog_dircan be set using OS env variable. E.g. forsetup:data_dir(), the OS env varSETUP_DATA_DIRcan override other settings. The default prefix,SETUP, can be changed using-setup os_env_prefix P