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https://issues.apache.org/jira/browse/MSOURCES-137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17742302#comment-17742302
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Herve Boutemy commented on MSOURCES-137:
----------------------------------------
root cause found in plexus-archiver
https://github.com/codehaus-plexus/plexus-archiver/pull/293
> umask makes artifacts generated by maven-source-plugin not easy to reproduce
> ----------------------------------------------------------------------------
>
> Key: MSOURCES-137
> URL: https://issues.apache.org/jira/browse/MSOURCES-137
> Project: Maven Source Plugin
> Issue Type: Improvement
> Affects Versions: 3.3.0
> Reporter: Andreas Veithen
> Priority: Minor
>
> It appears that inside the archive created by maven-source-plugin, the
> permissions of {{META-INF/maven/\*/\*/pom.properties}} depend on the current
> umask.
> Steps to reproduce:
> {code:java}
> $ umask 022
> $ mvn clean install
> $ umask 002
> $ mvn clean verify artifact:compare
> {code}
> This can be used on any project attaching a source jar (e.g.
> [https://github.com/apache/ws-axiom/]).
> Example diffoscope output:
> {code:java}
> --- target/reference/axiom-weaver-annotations-2.0.0-SNAPSHOT-sources.jar
> +++ target/axiom-weaver-annotations-2.0.0-SNAPSHOT-sources.jar
> │┄ Archive contents identical but files differ, possibly due to different
> compression levels. Falling back to binary comparison.
> ├── zipinfo {}
> │ @@ -14,9 +14,9 @@
> │ -rw-r--r-- 2.0 unx 170 b- defN 22-Mar-13 11:17 META-INF/NOTICE
> │ -rw-r--r-- 2.0 unx 1365 b- defN 22-Mar-13 11:17
> org/apache/axiom/weaver/annotation/FactoryMethod.java
> │ -rw-r--r-- 2.0 unx 1101 b- defN 22-Mar-13 11:17
> org/apache/axiom/weaver/annotation/Inject.java
> │ -rw-r--r-- 2.0 unx 1095 b- defN 22-Mar-13 11:17
> org/apache/axiom/weaver/annotation/Mixin.java
> │ -rw-r--r-- 2.0 unx 1100 b- defN 22-Mar-13 11:17
> org/apache/axiom/weaver/annotation/Singleton.java
> │ -rw-r--r-- 2.0 unx 1136 b- defN 22-Mar-13 11:17
> org/apache/axiom/weaver/annotation/WeavablePackage.java
> │ -rw-r--r-- 2.0 unx 1411 b- defN 22-Mar-13 11:17
> META-INF/maven/org.apache.ws.commons.axiom/axiom-weaver-annotations/pom.xml
> │ --rw-r--r-- 2.0 unx 95 b- defN 22-Mar-13 11:17
> META-INF/maven/org.apache.ws.commons.axiom/axiom-weaver-annotations/pom.properties
> │ +-rw-rw-r-- 2.0 unx 95 b- defN 22-Mar-13 11:17
> META-INF/maven/org.apache.ws.commons.axiom/axiom-weaver-annotations/pom.properties
> │ 20 files, 19157 bytes uncompressed, 8089 bytes compressed: 57.8%
> │ --- target/reference/axiom-weaver-annotations-2.0.0-SNAPSHOT-sources.jar
> ├── +++ target/axiom-weaver-annotations-2.0.0-SNAPSHOT-sources.jar
> │ @@ -676,15 +676,15 @@
> │ 00002a30: 0000 0000 0000 a481 b020 0000 4d45 5441 ......... ..META
> │ 00002a40: 2d49 4e46 2f6d 6176 656e 2f6f 7267 2e61 -INF/maven/org.a
> │ 00002a50: 7061 6368 652e 7773 2e63 6f6d 6d6f 6e73 pache.ws.commons
> │ 00002a60: 2e61 7869 6f6d 2f61 7869 6f6d 2d77 6561 .axiom/axiom-wea
> │ 00002a70: 7665 722d 616e 6e6f 7461 7469 6f6e 732f ver-annotations/
> │ 00002a80: 706f 6d2e 786d 6c50 4b01 0214 0314 0000 pom.xmlPK.......
> │ 00002a90: 0808 0022 5a6d 54b9 68bb 2558 0000 005f ..."ZmT.h.%X..._
> │ -00002aa0: 0000 0052 0000 0000 0000 0000 0000 00a4 ...R............
> │ +00002aa0: 0000 0052 0000 0000 0000 0000 0000 00b4 ...R............
> │ 00002ab0: 81e8 2300 004d 4554 412d 494e 462f 6d61 ..#..META-INF/ma
> │ 00002ac0: 7665 6e2f 6f72 672e 6170 6163 6865 2e77 ven/org.apache.w
> │ 00002ad0: 732e 636f 6d6d 6f6e 732e 6178 696f 6d2f s.commons.axiom/
> │ 00002ae0: 6178 696f 6d2d 7765 6176 6572 2d61 6e6e axiom-weaver-ann
> │ 00002af0: 6f74 6174 696f 6e73 2f70 6f6d 2e70 726f otations/pom.pro
> │ 00002b00: 7065 7274 6965 7350 4b05 0600 0000 0014 pertiesPK.......
> │ 00002b10: 0014 0057 0600 00b0 2400 0000 00 ...W....$....
> {code}
> Note that although maven-jar-plugin adds the same {{pom.properties}} file to
> the archive, it isn't affected by this problem.
> I discovered this while trying to check the reproducibility of Apache Axiom
> builds in a Github Codespace, where file permissions are set in a peculiar
> way; see [https://github.com/orgs/community/discussions/26026].
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