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d2ff400641
In Prometheus, label values are treated as strings when used with the
`=` and `!=` operators, and as regular expressions when used with the
`=~` and `!~` operators.
Injecting and then highlighting all label values as regex leads to a
situation where entirely valid **string** label values containing regex
special characters are mistakenly parsed and highlighted as regex. This
results in syntax errors, causing labels to be highlighted incorrectly.
For example, in `foo{bar=~"[a-z]{1,3}"}`, `{` and `}` are regex special
characters, so regex highlighting is expected. However, in
`foo{path="/foo/{id}"}`, `{` and `}` are just part of the string and
have no special meaning, so the whole value should be highlighted as a
string.
10 lines
254 B
PromQL
10 lines
254 B
PromQL
foo{path=~"^foo$"}[5m] or
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# ^ @string.regexp
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foo{path!~"[a-zA-Z0-9]{1,3}"}[5m] or
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# ^ @string.regexp
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foo{path="/api/users/{userId}"}[5m] or
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# ^ @string
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foo{path!="/api/users/{userId}"}[5m]
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# ^ @string
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# vim: ft=promql
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