How to stop at first occurrence while replacing a multiline text [duplicate] - sed

Question

This question already has answers here:
How to use sed to replace only the first occurrence in a file?
(25 answers)
Closed 7 years ago.
I have a file pom.xml, which needs to have the version with a SNAPSHOT appended to it. At times, the SNAPSHOT is missing, which results in the build failing. I'm trying to replace it with SNAPSHOT if it doesn't exist.
Actual:
<artifactId>package1</artifactId>
<version>1.0.0</version>
Desired:
<artifactId>package1</artifactId>
<version>1.0.0-SNAPSHOT</version>
Since the artifactId is not going to be the same across all the projects, I tried to search for a pattern that starts from </artifactId> to </version> and replace it with the SNAPSHOT text added to it. This has resulted in replacing the text till the last version available in pom.xml.
I've tried the following:
cat pom.xml | sed ':a;N;$!ba;1,/<\/artifactId>/s/<\/artifactId><version>[0-9]*.[0-9]*.[0-9]*<\/version>/<\/artifactId><version>1.0.0-SNAPSHOT<\/version>/g'
(Not working at all as it's unable to find the end of line).
cat common-pom.xml | sed ':a;N;$!ba;0,/<\/artifactId>/s/<\/artifactId>.*<\/version>/<\/artifactId><version>0.0.0-SNAPSHOT<\/version>/g'
(Is able to do the changes, but it's replacing all the text till the last version available in pom.xml).
How do I stop the replacement to the first occurrence in a multi line replacement?

Answer 1

If I understood the question correctly, this should work:
sed -r '
/<artifactId>/ {
n
s/(([0-9]+\.){2}[0-9])(<\/version>)/\1-SNAPSHOT\3/
}
' infile
You read the complete file into sed before starting with replacements. This just looks for a line with <artifactId>, reads the next line (n) and makes the replacement there.
Also, instead of using cat to pipe to sed, you can just give the file to be processed as an argument to sed.
This works also without -r, but then all parentheses and braces would have to be escaped.
Example file:
<artifactId>package1</artifactId>
<version>1.0.0</version> <-- should get SNAPSHOT
<artifactId>package1</artifactId>
<version>1.0.0-SNAPSHOT</version> <-- already has SNAPSHOT
Somethingelse
<version>1.0.0</version> <-- doesn't follow artifactId line
results in
<artifactId>package1</artifactId>
<version>1.0.0-SNAPSHOT</version>
<artifactId>package1</artifactId>
<version>1.0.0-SNAPSHOT</version>
Somethingelse
<version>1.0.0</version>