I'm trying to format a drop down variable in Grafana in which the values are structured email addresses that I need to set a portion to the named capture group and place the entire email address in the named capture group . The general details of what I'm trying to do is explained on the Grafana Support page. What I'm looking to do is take the values in a variable query and modify them in the regex area to accomplish the following.
With the query result values of:
development [email protected]
production [email protected]
production [email protected]
I would like the regex to produce two named capture groups text and value.
<text> | <value>
info | development [email protected]
errors | production [email protected]
warnings | production [email protected]
The regex (\S \ )?(?<text>\S )@.*|(?<value>.*) only seems to set the <text> capture group.
Is this something that is possible?
CodePudding user response：
As @Barmar pointed out in the comments, you want nested groups instead of alternatives.
This will work in Grafana:
/(?<value>\S \ (?<text>.*)@.*)/
CodePudding user response：
You can use
(?<value>[^@\s] \ (?<text>[^@\s ]*)@.*)
See the regex demo.
Details:
(?<value>- Group "value" start:[^@\s]- one or more chars other than@and whitespace\- a literal(?<text>- Group "text" start:[^@\s ]*- zero or more chars other than@, whitespace and
)- end of Group "text"
@- a@char.*- any zero or more chars other than line break chars as many as possible)- end of Group "value".