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From Matt Benson <gudnabr...@yahoo.com>
Subject RE: converting date/time
Date Mon, 25 Nov 2002 22:12:21 GMT
Did anybody else have any opinions on whether the
change I proposed in this thread would be valuable?

-Matt

--- Matt Benson <gudnabrsam@yahoo.com> wrote:
> Again, what I was talking about was a less
> date/time-centric approach:
> 
> <property name="dirname" location="DirName_0206" />
> 
> <property name="yymm" value="${dirname#DirName_}" />
> <property name="newdate"
>           value="20${yymm:0:2}-${yymm:2}-01" />
> 
> Here "${dirname#DirName_}" returns "0206" using
> pattern matching:  "If the pattern matches the
> beginning of the variable's value, delete the
> shortest
> part that matches and return the rest." (O'Reilly,
> Learning the bash Shell)  This approach relies on
> your
> knowing that the prefix will be DirName.  Or maybe
> you
> just know that the last four characters are yymm. 
> Then you could pull them off with a substring
> operation (described in detail below):
> 
> <property name="yymm" value="${dirname:-4}" />
> 
> (This negative offset is documented in the O'Reilly
> bash book but it doesn't seem to work under either
> Cygwin or the Solaris bash executable, but that
> doesn't mean it couldn't be coded to work in Ant!)
> 
> Either way, you the century "20" and day "01" are
> (gasp) hard-coded, and the year and month are
> separated by using string operations:
> 
> "${yymm:0:2}" - substring pos 0 for 2 chars
> "${yymm:2}" - substring pos 2 to end
> 
> I feel like this would be fairly versatile.
> 
> -Matt
> 
> --- EXT / FOCAL MALAPRADE Roland
> <ext.focal.malaprade@sncf.fr> wrote:
> > Yes that's what I'm looking for. something like
> > this:
> > 
> > <datetime src="0206" format="yyMM"
> > property="newdate" />
> > 
> > then ${newdate} = 2002-06-01
> > 
> > I supposed it would be better like this:
> > 
> > property date = 0206
> > <datetime src="${date}01" format="yyMMdd"
> > property="newdate" />
> > 
> > then ${newdate} = 2002-06-01
> > 
> > There doesn't seems to be anything like this in
> Ant
> > already, I'll probably
> > have to code it myself
> > 
> > Roland.
> > 
> > 
> > 
> > > -----Message d'origine-----
> > > De : Matt Benson [mailto:gudnabrsam@yahoo.com]
> > > Envoye : mercredi 13 novembre 2002 16:02
> > > A : Ant Users List
> > > Objet : Re: converting date/time
> > > 
> > > 
> > > Are you saying that, based on the directory name
> > being
> > > DirName_0206, you would know the corresponding
> > date
> > > would be 2002-06-01?  If so, then it seems like
> > some
> > > simple String operations would do the trick...
> > this
> > > led me to think how cool it would be if the
> > properties
> > > syntax were expanded to include string and
> pattern
> > > operations a la bash (I don't know if all its
> > string
> > > operators are available in ksh or csh). 
> Probably
> > it
> > > wouldn't be difficult to code (if somebody tells
> > me
> > > where properties are parsed out of ${} syntax I
> > might
> > > look into it myself) and it could maybe make
> life
> > > easier in cases like this.
> > > 
> > > Another related thing that might be cool is to
> > have
> > > either or both of:  a way to limit the scope of
> a
> > > property, or a way to return a value from an
> > > <antcall>, so that it might not be so "costly"
> to
> > use
> > > properties for temporary values.
> > > 
> > > Okay, so now everybody tell me I'm crazy and
> argue
> > > with me... :)
> > > 
> > > -Matt
> > > 
> > > 
> > > --- EXT / FOCAL MALAPRADE Roland
> > > <ext.focal.malaprade@sncf.fr> wrote:
> > > > I have a series of month-based directories in
> > the
> > > > format "DirName_yyMM". So
> > > > for example: DirName_0206 is the directory for
> > June
> > > > 2002.
> > > > 
> > > > In these directory, I need to replace dates in
> > some
> > > > files, but I need the
> > > > date in the format yyyy-MM-dd, for example,
> > > > "2002-06-01".
> > > > 
> > > > Is there any task that can do this? like a
> > <tstamp>
> > > > where you could specify
> > > > the date/time instead of the current
> date/time.
> > > > 
> > > > I suppose I could just write a task myself,
> but
> > if
> > > > something like that
> > > > already exists, it would make my life
> easier...
> > or
> > > > lazier ;-)
> > > > 
> > > > Thanks,
> > > > Roland.
> > > > 
> > > > 
> > > > --
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> > > > 
> > > 
> > > 
> > >
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