[GRASS5] GRASS branching
bernhard at intevation.de
Tue May 30 11:19:24 EDT 2000
On Tue, May 30, 2000 at 07:56:32AM -0600, John Huddleston wrote:
> Markus, (and Grass CVS users)
> Sorry to take so long to reply, had the day off yesterday!
John is right, one question remains on my side:
I assume that we need to use branch tags, as some of the source
code fixed might get merged into the experimental version and some not.
Should we not create one stable branch and use one tag for it?
> > - keep the main tree as experimental (HEAD = default trunk as now,
> > all modules have "exp" tag currently)
> > - create stable branch from this tree by branch tagging
> No branch tag, just a normal tag will suffice. The branch
> tag is a spacial form of the tag that allows a merge at a later
> time. Since in this case, we do not want to change the past,
> put a TAG on the main (much like you did with xgrass).
> Again, a branch tag is necessary when two programmers
> are modifying the same code and one is changing the
> "external" features of the code (changing the RETURN code
> of 0 or 1, or the number or type of arguments, or changing the
> name of the function, subroutine, method, or class.) In this
> way the developer can continue to use versioning but it
> will not impact other developers until a merge is executed.
> > Advantage:
> > - no changes for the developers as the tags keep unchanged
> > - easier to maintain: if module is stable, "stable tag" will
> > be applied, else no changes (if unstable)
> > Results:
> > - trunk keeps as it is (no changes for you)
> > - stable version can be checked out by tag specification
> > Disadvantage:
> > - might be unusual to have main trunk as experimental and
> > stable as branch ? (I don't know)
> Usually the HEAD is the experimental section. Users who want
> a stable version can check out (or export) code with a tag.
> > Questions:
> > - If applying a branch "stable" tag, does such a tagged module
> > disappear from the main (experimental) trunk?
> No, all files that are tagged are still in the repository. Only
> the cvs remove puts files into the Attic directory and the
> disappear from the HEAD branch.
> John Huddleston
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