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Date: Wed, 7 Jan 2015 15:40:11 +0100
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Subject: Re: Question about Commit Policy
From: Fabian Hueske <fhueske@apache.org>
To: "dev@flink.incubator.apache.org" <dev@flink.incubator.apache.org>
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+1 for the guide and JIRA references.

I'd keep the component tags optional though.
As Max said, there is less space to display a meaning message if a commit
addresses several components. Separating changes into commits by components
sounds not very practical to me.
Also without a clear definition of when to add which component tag, we
cannot rely on them anyway.

Git should also have better tools than browsing commit messages when
looking for a commit that changed specific code.

2015-01-07 15:24 GMT+01:00 Stephan Ewen <sewen@apache.org>:

> I personally like the tags very much. I think the streaming component was
> the first to introduce it and it stuck me as a very good idea.
>
> +1 to stick with them
>
> On Wed, Jan 7, 2015 at 3:03 PM, M=C3=A1rton Balassi <balassi.marton@gmail=
.com>
> wrote:
>
> > I prefer component declarations, the current best practice comes in han=
dy
> > when searching through commits. Answering a "when did key selection
> change
> > for streaming?" type question I just had to answer would have been a bi=
t
> > more difficult without it - manageable though.
> >
> > In case of streaming it does not yield much to omit the component
> > declaration, most of the time then we would need to add it to the commi=
t
> > message itself, e.g. :
> > "[streaming] Join API rework", could be e.g. rewritten as "Join API
> rework
> > for streaming". I do prefer the former one, because it is not only more
> > straight-forward to understand, but a bit shorter as well.
> > Of course there are counter-examples, like "[streaming] DataStream
> > refactor" -> "DataStream refactor".
> >
> > I can accept optional, but would like to keep it strongly recommended f=
or
> > streaming. I also find the [docs] tag helpful.
> >
> > On Wed, Jan 7, 2015 at 2:43 PM, Stephan Ewen <sewen@apache.org> wrote:
> >
> > > Should we put that to an official vote, or wait for people to comment
> and
> > > (if nobody objects) consider it as agreed on through lazy consensus?
> > >
> > > On Wed, Jan 7, 2015 at 2:34 PM, M=C3=A1rton Balassi <
> balassi.marton@gmail.com
> > >
> > > wrote:
> > >
> > > > +1 for the guide, thanks for clarifying the issue
> > > >
> > > > On Wed, Jan 7, 2015 at 2:30 PM, Till Rohrmann <trohrmann@apache.org=
>
> > > > wrote:
> > > >
> > > > > +1
> > > > >
> > > > > On Wed, Jan 7, 2015 at 12:41 PM, Aljoscha Krettek <
> > aljoscha@apache.org
> > > >
> > > > > wrote:
> > > > >
> > > > > > Yes, we should have a guide like that somewhere.
> > > > > >
> > > > > >
> > > > > > On Wed, Jan 7, 2015 at 12:33 PM, Stephan Ewen <sewen@apache.org=
>
> > > > wrote:
> > > > > >
> > > > > > > We have not exactly defined this so far, but it is a good poi=
nt
> > to
> > > do
> > > > > so.
> > > > > > >
> > > > > > > I personally find it good to have changes associated with an
> > issue,
> > > > > > because
> > > > > > > it allows you to trace back why the change was done.
> > > > > > > To make sure we do not overdo this and impose totally
> unnecessary
> > > > > > overhead,
> > > > > > > I would suggest the following:
> > > > > > >
> > > > > > > *No issue is required for*
> > > > > > >
> > > > > > >   - Small fixes like typos, simple warnings, adding/improving=
 a
> > > > comment
> > > > > > >
> > > > > > >   - Adding and improving existing pages of the documentation
> > > > > > >
> > > > > > >   - Simple improvements of style / elegance / efficiency
> (simple
> > > > > > rewriting
> > > > > > > a loop / condition / method interaction) if no behavior is
> > changed
> > > > > > >
> > > > > > > =3D=3D> Basically anything that does not change or add
> functionality
> > > > > > >
> > > > > > >
> > > > > > > *An issue is required for*
> > > > > > >
> > > > > > > Everything else, in particular:
> > > > > > >
> > > > > > >   - Anything that changes functionality or behavior relevant =
to
> > > users
> > > > > > >
> > > > > > >   - Anything that changes functionality or behavior relevant =
to
> > > other
> > > > > > > components
> > > > > > >
> > > > > > >   - Anything that adds a feature
> > > > > > >
> > > > > > >
> > > > > > > I would vote to allow coarse issues and have multiple commits
> > that
> > > > > > > reference it
> > > > > > >
> > > > > > > [FLINK-1234] [runtime] Runtime support some cool new thing
> > > > > > > [FLINK-1234] [java api] Add hook for cool thing to java api
> > > > > > > [FLINK-1234] [scala api] Add hook for that thing to scala api
> > > > > > > [FLINK-1234] [optimizer] Make optimizer aware that it can
> exploit
> > > > this
> > > > > > > thing
> > > > > > >
> > > > > > >
> > > > > > > -------------------------
> > > > > > >
> > > > > > > The guide lines for pull-requests for committers are as
> follows:
> > > > > > >
> > > > > > > *A pull request with comments/additional signoff is required
> for
> > > > > anything
> > > > > > > that*
> > > > > > >
> > > > > > >   - breaks the public APIs
> > > > > > >
> > > > > > >   - adds methods to the public APIs (that will need to be kep=
t
> > > stable
> > > > > > from
> > > > > > > them on)
> > > > > > >
> > > > > > >   - alters user-facing behavior (e.g., mutability of types,
> null
> > > > value
> > > > > > > handling, window semantics, ...)
> > > > > > >
> > > > > > >   - adds user-facing knobs (switches, config parameters,
> > execution
> > > > > option
> > > > > > > on the execution environment)
> > > > > > >
> > > > > > >   - adds additional maven dependencies
> > > > > > >
> > > > > > >   - changes the way components interact
> > > > > > >
> > > > > > >   - touches highly sensitive and performance critical parts,
> such
> > > > > memory
> > > > > > > management or network stack
> > > > > > >
> > > > > > > =3D=3D> Changes that come with a pull request should have one=
 or
> more
> > > > > issues
> > > > > > > associated with them.
> > > > > > >
> > > > > > >
> > > > > > > Anyone that wants to have comments or some additional pairs o=
f
> > eyes
> > > > in
> > > > > > the
> > > > > > > code should make a pull request as well.
> > > > > > >
> > > > > > > -------------------------
> > > > > > >
> > > > > > > *Naming scheme for commits*
> > > > > > >
> > > > > > > [issue] [component] Message
> > > > > > >
> > > > > > > For fixes without an issue, the issue can be dropped.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > What do you think? Should we put this into the Wiki?
> > > > > > >
> > > > > > >
> > > > > > > Greetings,
> > > > > > > Stephan
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > On Wed, Jan 7, 2015 at 11:48 AM, Aljoscha Krettek <
> > > > aljoscha@apache.org
> > > > > >
> > > > > > > wrote:
> > > > > > >
> > > > > > > > Hi,
> > > > > > > > I feel we never really talked about this. So, should we ope=
n
> > Jira
> > > > > > issues
> > > > > > > > even for very small fixes and then add the ticket number to
> the
> > > > > commit?
> > > > > > > Or
> > > > > > > > should we just commit those small fixes. Right now, I have
> two
> > > > small
> > > > > > > fixes
> > > > > > > > (one is 4 lines, the other one is two lines) for the
> > > ValueTypeInfo
> > > > > and
> > > > > > > > TextValueInputFormat. Very obscure stuff, I know. :D
> > > > > > > >
> > > > > > > > Cheers,
> > > > > > > > Aljoscha
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>

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