elharo opened a new issue, #1620:
URL: https://github.com/apache/maven-dependency-plugin/issues/1620
## Problem
The `appendArtifactPath()` method at line 278 calls
`art.getFile().getPath()` without checking if `getFile()` returns null:
```java
protected void appendArtifactPath(Artifact art, StringBuilder sb) {
if (prefix == null) {
String file = art.getFile().getPath(); // NPE if getFile() returns
null
// ...
}
}
```
Artifacts without a resolved file (e.g., system scope or unresolved
dependencies) can have a null file.
## Fix
Add a null check before calling `getPath()`:
```java
File artifactFile = art.getFile();
if (artifactFile == null) {
sb.append("[unknown]");
return;
}
String file = artifactFile.getPath();
```
## File
`src/main/java/org/apache/maven/plugins/dependency/fromDependencies/BuildClasspathMojo.java:276-292`
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