Limit detection to a block of text in a text document

[tjfoth]

I am trying to detect changes that occur in a text file posted by the US National Weather Service. The change would always occur between two strings. A sample of the relevant portion of the file follows.

There is no CSS/JSONPath/JQ/XPath to use: it is just all text.

I want to consider the entire block. I don't know how to select it by lines.

What I want to monitor is everything between and not including .SYNOPSIS.. and &&

The same follows. This feels more like a feature request? Thanks!

FXUS61 KBOX 302335
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
735 PM EDT Wed Apr 30 2025

.SYNOPSIS...
Cold tonight with lows in the 30s due to clear skies and calm winds.
Pleasant spring weather continues tomorrow with high pressure
overhead. Friday will feature a period of early-day scattered
showers and possible thunderstorms, with another round later
Friday afternoon. Rainy conditions then continue into Saturday,
wettest during Saturday afternoon into the evening. Our weather
pattern then turns cooler with a period of onshore flow for
Sunday into early next week, but there is larger uncertainty on
if this period will feature generally dry weather or potentially
soggy conditions.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
High pressure moves in overhead tonight, allowing winds to become

[dgtlmoon]

Hey again!

I'm guessing you mean this document https://forecast.weather.gov/product.php?site=BOX&issuedby=BOX&product=AFD&format=CI&version=1&glossary=1

The answer is /\.SYNOPSIS\.\.\.(.*?)(?:&&|\Z)/is

Precise anchors: starts with .SYNOPSIS...
Handles newlines: /s flag + .*?
Doesn’t over-match: ? makes it non-greedy
Flexible end: matches either && or the end of the text

[dgtlmoon]

Bonus idea - would be cool to have some drag/select so you could automatically select it in the UI

[tjfoth]

Thank you so much! I'll try it tomorrow. I still get confused about whether or not CD.io's regex can span lines.

…

--- Tom Foth ***@***.*** ***@***.***

On Thu, May 1, 2025 at 12:10 PM dgtlmoon ***@***.***> wrote: Bonus idea - would be cool to have some drag/select so you could automatically select it in the UI — Reply to this email directly, view it on GitHub <#3164 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACOIIO6ECTU6FHUIKNLMTBD24JBQVAVCNFSM6AAAAAB4HCC5TGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTGMBQGU2TIMI> . You are receiving this because you authored the thread.Message ID: <dgtlmoon/changedetection.io/repo-discussions/3164/comments/13005541@ github.com>

[dgtlmoon]

it does since last few versions.