[MNG-8586] Expose Maven version segments as properties

[cstamas]

Expose version segments.

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https://issues.apache.org/jira/browse/MNG-8586

[slawekjaranowski]

What do you think about to add to org.apache.maven.rtinfo.RuntimeInformation

[cstamas]

IMO not needed, that one is used for "programmatic access" and there caller can do with version string whatever he wants. The main idea behind this PR is to be able to create profile in POM that is active in Maven4 only, and have it done in Maven3 compatible way (as Model 4.1.0 already have advanced expressions like inrange(${maven.version}, '[4,)'))

[cstamas]

Example with this merged:

• maven3: profile with property activation like <name>!maven.version.major</name> -- not even defined => this is Maven3 or older
• maven4: profile with property action like <name>maven.verson.major</name> and <value>4</value>.

[cstamas]

@gnodet @slawekjaranowski given maven.version.major "does the job" (for use case explained above) am tinkering to we want maybe to lower what we expose here? Is minor/patch/snap really needed? For example, snap may be useful (i can imagine some IT with it that changes something or not), but patch and minor?

[Bukama]

@gnodet @slawekjaranowski given maven.version.major "does the job" (for use case explained above) am tinkering to we want maybe to lower what we expose here? Is minor/patch/snap really needed? For example, snap may be useful (i can imagine some IT with it that changes something or not), but patch and minor?

I'm neither one of the two, but I would publish all three. Allows more flexibility, use cases we are not aware of yet and even more: Prevents confusion on the users side.

[slawekjaranowski]

@gnodet @slawekjaranowski given maven.version.major "does the job" (for use case explained above) am tinkering to we want maybe to lower what we expose here? Is minor/patch/snap really needed? For example, snap may be useful (i can imagine some IT with it that changes something or not), but patch and minor?

can be all for consistency

[gnodet]

Those need to be in Constants so that they are documented properly.