ruby - Not able to send flags when using RVM wrapper -

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i'm trying use crontab rvm setup (creating backup using backup gem).

my crontab entry runs following command several times day:

/home/user/.rvm/gems/ruby-2.1.1/wrappers/backup -t app

however, misterious reason, -t flag beeing changed _t (dash turns underscore --trigger changes __trigger). in cause of that, i'm not able use bin correctly. error message says:

could not find command "_t"

please note using backup -t app works fine, using wrapper fails.

is there reason behing such behavior? can run wrapper non-underscored flags? in advance.


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