Re: transcoding recipe request

[Louis-David Mitterrand]

On Wed, May 10, 2006 at 03:03:52PM -0500, David Greene wrote:
> > What I need is a way of:
> > 
> > - recursing into the flac directory tree, 
> > - generate a target list from the flac files with patsubst
> > - another way?
> > 
> > Thanks in advance for your suggestions,
> 
> Off the top of my head (drawing from recent experience):
> 
> # Assumes a UNIX-type environment
> $(FLACS) := $(shell find /home/ldm/music/flac -name "*.flac" -print)
> 
> all: $(FLACS)
> 
> /home/ldm/music/alaw/%.alaw: /home/ldm/music/flac/%.flac
>     flac -cds $< | sox -S -t wav - -r 8000 -c 1 $@ resample -ql
> 
> I've not tested this but it might give you a start.

Thanks!

Here is the working recipe I built from your suggestions:

        FLACS := $(shell find ./flac -name "*.flac" -print)

        ALAWS := $(patsubst ./flac/%.flac,./alaw/%.al,$(FLACS))

        all: $(ALAWS)

        ./alaw/%.al: ./flac/%.flac
                [ -d $(dir $@) ] || mkdir -p $(dir $@)
                flac -cds $< | sox -S -t wav - -r 8000 -c 1 $@ resample -ql

Is there a way to auto-create directories as needed by targets in the 
implicit rule? (thus avoiding the the -d test and mkdir)

Also I noticed filenames with whitespace produce errors in the implicit 
rule. Should I apply quoting somewhere?