elharo opened a new pull request, #640:
URL: https://github.com/apache/maven-war-plugin/pull/640
Fixes #526
Add a new `compressLibs` parameter (default: `true`) to the
maven-war-plugin. When set to `false`, dependency library JARs in
`WEB-INF/lib/` are stored in the WAR archive using STORED mode (no compression)
instead of DEFLATED mode.
**Why:** JAR files are already compressed internally. Re-compressing them
when adding to a WAR provides negligible size reduction but adds CPU overhead
during both WAR creation and servlet container startup (the JARs must be
decompressed before they can be loaded). Storing them in STORED mode eliminates
this redundant compression.
**Implementation:** Creates an `UncompressedLibsWarArchiver` subclass of
`WarArchiver` that overrides `zipFile()` to temporarily disable compression for
entries under `WEB-INF/lib/`, while all other entries (classes, resources,
web.xml, etc.) continue to be compressed normally.
**Usage:**
```xml
<configuration>
<compressLibs>false</compressLibs>
</configuration>
```
**Changes:**
- `AbstractWarMojo.java`: Added `compressLibs` parameter with getter
- `WarMojo.java`: Added `UncompressedLibsWarArchiver` inner class;
`getWarArchiver()` returns it when `compressLibs=false`
- Integration test `MWAR-446` verifying JARs are STORED and other entries
are DEFLATED
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