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Elliotte Rusty Harold commented on MNG-6420: -------------------------------------------- Found this tidbit from [Joerg Schaible|https://cwiki.apache.org/confluence/display/~joehni] in the Wiki: {quote} The version scheme for Xpp3 has never been understood by Maven (and lead in the public repo to quite a mess), they use directly the alphabet to number their releases: {quote} {quote} 1.1.3.4.C -> 1.1.3.4.D -> ... -> 1.1.3.4.O 1.1.3.7 1.1.3.8 1.1.4 -> 1.1.4b -> 1.1.4c [http://www.extreme.indiana.edu/dist/java-repository/xpp3/distributions/] {quote} This is a real world case where our handling of letters after dots seems to be exactly backwards. > ComparableVersion incorrectly parses certain version strings > ------------------------------------------------------------ > > Key: MNG-6420 > URL: https://issues.apache.org/jira/browse/MNG-6420 > Project: Maven > Issue Type: Bug > Components: core > Affects Versions: 3.5.3, 3.6.3 > Reporter: Ross Goldberg > Priority: Major > > For certain version strings, ComparableVersion doesn't follow the Maven > version order spec > (https://maven.apache.org/pom.html#Version_Order_Specification), and/or > produces canonical versions that are incongruent with both the spec and the > code's ordering. > To improve the code & fix the following bugs, I completely rewrote the > version parser (using Java 8). I will create a PR sometime soon. > *Bug 1: comparison violates spec ordering* > > java -jar /usr/local/Cellar/maven/3.5.3/libexec/lib/maven-artifact-3.6.3.jar > 1-0.3 1 > > Outputs: > > 1. 1-0.3 == 1-0.3 > 1-0.3 == 1 > 2. 1 == 1 > > This problem stems from: > > [https://github.com/apache/maven/blob/b8c06e61ab73cd9e25a5b2c93d9e5077b2196751/maven-artifact/src/main/java/org/apache/maven/artifact/versioning/ComparableVersion.java#L295-L296] > > > > *Bug 2: canonical incongruent with spec and code ordering* > > java -jar /usr/local/Cellar/maven/3.5.3/libexec/lib/maven-artifact-3.6.3.jar > 1-0-2 1-0.1 > > 1. 1-0-2 == 1-2 > 1-0-2 < 1-0.1 > 2. 1-0.1 == 1-0.1 > > This problem stems from retaining ListItems that, after normalization, have > no children other than the subsequent ListItem. Removing the unnecessary > ListItem should fix this (i.e. remove the extraneous ListItem (named > extraneous) from its parent ListItem (named parent), then add the only child > of extraneous to parent). -- This message was sent by Atlassian Jira (v8.3.4#803005)