dongjoon-hyun commented on a change in pull request #28532:
URL: https://github.com/apache/spark/pull/28532#discussion_r425499462
##########
File path: dev/test-dependencies.sh
##########
@@ -47,7 +47,7 @@ OLD_VERSION=$($MVN -q \
-Dexec.executable="echo" \
-Dexec.args='${project.version}' \
--non-recursive \
- org.codehaus.mojo:exec-maven-plugin:1.6.0:exec)
+ org.codehaus.mojo:exec-maven-plugin:1.6.0:exec | grep -e
'[0-9]\.[0-9]\.[0-9]')
Review comment:
It's two lines, @srowen .
**NO FALLBACK**
```
$ build/mvn -q -Dexec.executable="echo" -Dexec.args='${project.version}'
--non-recursive org.codehaus.mojo:exec-maven-plugin:1.6.0:exec
Using `mvn` from path:
/Users/dongjoon/APACHE/spark-merge/build/apache-maven-3.6.3/bin/mvn
3.1.0-SNAPSHOT
```
**FALLBACK**
```
$ build/mvn -q -Dexec.executable="echo" -Dexec.args='${project.version}'
--non-recursive org.codehaus.mojo:exec-maven-plugin:1.6.0:exec
Falling back to archive.apache.org to download Maven
Using `mvn` from path:
/Users/dongjoon/APACHE/spark-merge/build/apache-maven-3.6.3/bin/mvn
3.1.0-SNAPSHOT
```
**In the script**
```
$ echo (build/mvn -q -Dexec.executable="echo"
-Dexec.args='${project.version}' --non-recursive
org.codehaus.mojo:exec-maven-plugin:1.6.0:exec)
Using `mvn` from path:
/Users/dongjoon/APACHE/spark-merge/build/apache-maven-3.6.3/bin/mvn
Falling back to archive.apache.org to download Maven 3.1.0-SNAPSHOT
```
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