Java regex to match pattern with exceptions

Question

My Jenkins task searches the console output to see if the build is stable. It searches this java pattern: exception|error|warning|Segmentation

I have a compile parameter that has -Werror=format-security in it, so Jenkins should not match it. I try this [exception|error|warning|Segmentation][^Werror] but it still finds Werror in the text. How can I make it so it doesn't think my build is unstable because of compile parameter?

Try ^(?!.*Werror).*(?:exception|error|warning|Segmentation) — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Oct 3, 2017 at 7:41
But is this java regex pattern? The test failed regexplanet.com/advanced/java/index.html or I am wrong. — nurp
– nurp, Commented Oct 3, 2017 at 7:44
No idea how you tested and against what strings. See this RegexPlanet demo (click "Java" to see the result, find() finds a partial match in the second string). — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Oct 3, 2017 at 7:46
You're right. it works at Jenkins as I wanted. I probably don't understand that test page's output. — nurp
– nurp, Commented Oct 3, 2017 at 7:57
Glad to help. I posted an answer. Note that Java supports all the constructs used in the pattern: ^ anchor, (?!...) negative lookahead, greedy matching and (?:...|...) non-capturing alternation groups. — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Oct 3, 2017 at 8:09

Wiktor Stribiżew · Accepted Answer · 2017-10-03 08:08:50Z

2

You may use

^(?!.*Werror).*(?:exception|error|warning|Segmentation)

See the RegexPlanet demo.

Details

^ - start of string
(?!.*Werror) - there must not be a Werror substring anywhere on the line
.* - any 0+ chars other than line break chars as many as possible
(?:exception|error|warning|Segmentation) - one of the values inside the non-capturing alternation group.

answered Oct 3, 2017 at 8:08

Wiktor Stribiżew

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