If the API has not settled yet, then wouldn't that mean the API is not 
stable?

I think what semver asks is very reasonable: Tell us when you break 
reverse compatibility. To do this, you can't use 0.x.x.

On Thursday, September 20, 2012 12:52:44 AM UTC-7, Mariusz Nowak wrote:
>
> Austin, version v0.x doesn't mean that project is not *stable*, in my 
> point of view everything published on npm should be stable (unstable should 
> just stay on github, or be published under different dedicated minor 
> version, like node does: even numbered stable, odd numbered experimental)
>
> Version v0.x just means that's it's API has not settled yet and it can 
> change breaking backwards compatibility. It's exactly the reason why 
> Node.js is not yet 1.x, and it's up to semver rules.
>
> On Thursday, September 20, 2012 3:43:31 AM UTC+2, Austin William Wright 
> wrote:
>>
>> I've noticed that quite a lot of Node.js packages are tagging version 
>> number zero for all their releases: 0.4.0, 0.9.9, 0.0.1, 0.27.4, etc (to 
>> pick from packages that I use). It's as if people think that if the program 
>> is not fully feature-complete, they shouldn't release version 1.0.0.
>>
>> You need not feel this way! Semver <http://semver.org/spec/v1.0.0.html> 
>> exists 
>> so that, in addition to providing a unique ID for each release, we can 
>> infer some basic facts about the compatibility of the release, in 
>> comparison to other releases. It doesn't mean your code has all the 
>> features you want, it doesn't mean it has any standard of quality, it 
>> doesn't even mean "beta" or "production-ready". All semver asks you to do 
>> is (1) tell us when you break reverse-compatibility of your public API, (2) 
>> tell us when you release a new feature, and (3) tell us when you patch a 
>> particular bug. *If you use major version zero, we lose all of this 
>> information.* By definition, major version zero carries no semantics 
>> whatsoever. ~0 (major version zero) is supposed to be used for internal 
>> development and quick iteration where nearly every change breaks of the 
>> public API. However, if you're releasing software publicly, your users 
>> expect some stability in your public API. The series of releases that are 
>> stable against one another should carry the same nonzero major revision 
>> number, like "1.x.x". If you accidentally make a change that breaks, then 
>> just release a bugfix release for the breakage, and optionally release a 
>> new major version that carries the breakage.
>>
>> If you don't identify when you break your public API, then developers 
>> have to manually figure out which releases are breaking, and which are safe 
>> to upgrade to.  We may have to carefully examine changelogs and create and 
>> run unit tests. This wastes developer time. It's also makes it hard to 
>> future-proof releases: If I know that 1.0.0 is compatible with my 
>> application, then so should 1.3.1, and any ~1 version. Unit tests are not a 
>> replacement for the major version number: When picking an appropriate 
>> package version to update to, developers (or automated programs) do not 
>> have access to changelogs or the source code to run unit tests on (nor 
>> should they). (There's also the corollary, version numbers are not a 
>> replacement for unit tests, of course.) Nor can per-module or per-function 
>> version numbers replace a package-wide version number. These sub-versions 
>> may be a good idea, but they do not tell us anything about which version of 
>> a package, something installed as a coherent whole, should be installed.
>>
>> Node.js itself is still releasing major version zero. This is 
>> unacceptable for all the same reasons. Node.js should be releasing 1.0.0 
>> right now (and actually, a long while ago). Then, when a new feature is 
>> added (major change of an internal library, new core library, etc), 
>> increment the minor version number. If it breaks reverse-compatibility 
>> (crypto finally starts using buffers, say), increment the major revision 
>> number. It might be a minor breakage, in which case we can run all our 
>> tests and ensure it's no change that breaks the program, and then we can 
>> say "My program is compatible with Node.js ~2 as well as ~1.2". There is 
>> nothing so special about any feature like libuv that its release can't be 
>> marked with 2.0.0 instead, it's just a number that tells us something 
>> broke. It doesn't mean it's conforming to any release schedule, it doesn't 
>> mean it's feature complete.
>>
>> Having "stable" and "unstable" branches is fine for Git development, 
>> however having stable/unstable version numbers is not: The stable branch 
>> should get it's own major version number. Unstable branches would be 
>> release candidates for the next major version number: 4.0.0-a1, 4.0.0-a4, 
>> 4.0.0-rc1, etc. (Of course this numbering scheme should be avoided in 
>> production for all the same reasons, it doesn't mean anything, it's just a 
>> period of rapid iteration and API breakage.)
>>
>> It's just a number, numbers are cheap. If you need to make a dozen 
>> consecutive, breaking releases, then simply number them accordingly, 3.0.0 
>> through 14.0.0. That's how semver works!
>>
>> Who else has encountered problems with packages breaking the semantic 
>> versioning scheme and reverse compatibility?
>>
>> Austin Wright.
>>
>

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