| Check if a value is valid according to the given constraints. |
| If -e is specified, the value is retrieved from the environment variable with the given name. |
| |
| ```text |
| Usage: |
| ops -validate [-e] [-m | -n | -r <regex>] <value> [<message>] |
| ``` |
| |
| ## Options |
| |
| ``` |
| -e Retrieve value from the environment variable with the given name. |
| -h Print this help message. |
| -m Check if the value is a valid email address. |
| -n Check if the value is a number. |
| -r string Check if the value matches the given regular expression. |
| ``` |
| |
| ## Examples |
| |
| ### Validate with regexp |
| |
| ### Validate email |
| |
| ``` |
| ops -validate -m example@gmail.com |
| ``` |
| |
| ```bash |
| ops -validate -r '^[a-z]+$' abc |
| ``` |
| |
| |
| |
