William Stein wrote:
> 2009/7/12 Dr. David Kirkby <david.kir...@onetel.net>:
>> William Stein wrote:
>>> On Wed, Jul 1, 2009 at 8:00 PM, Craig Citro<craigci...@gmail.com> wrote:
>>>>> Perhaps this facility exists. If not, do others thinks it would be worth
>>>>> adding?
>>>>>
>>>> Yep, this is very handy -- and indeed already exists. Try sage -f -m
>>>> foo.spkg. (I have no idea what "m" stands for ... maybe William does?)
>>> It used to be that nothing was deleted from spkg/build during the build
>>> process.
>>> Hence during the *m*ake process, sage-spkg was always run with the -m
>>> flag, for "make". However, now-a-days not deleting from spkg/build
>>> would use up too much disk space in most cases. So it's a
>>> historical accident. I remember the moment I named it that thinking
>>> "I will regret this choice of name".
>>>
>>>> This will leave everything in $SAGE_ROOT/spkg/build after building the
>>>> spkg.
>>>>
>>>> Or, alternatively, if you wanted it to work for *every* spkg, you
>>>> could change the default value of DELETE_TMP on line 76 of
>>>> $SAGE_ROOT/local/bin/sage-spkg.
>>> It would be nice to make an environment variable that makes this happen
>>> no matter what, as David Kirkby suggested aobve. One way would be to
>>> change the variable DELETE_TMP to SAGE_DELETE_TMP then change line 76
>>> to only set it to 0 if it is not already defined. That would I think
>>> nicely do the trick.
>>>
>>> William
>>>
>>
>> What package builds $SAGE_ROOT/local/bin/sage-spkg ? I will have a go
>> at sorting this out.
>
> It's the sage_scripts spkg.
>
> -- William
I tried to do this, but setting DELETE_TMP to 0 causes a syntax error.
The first line is the original line. The second line is what I think it
would be sensible to change that line to, but it fails. The third line
just sets DELETE_TMP to 0 instead of 1. That causes an error in the file.
#DELETE_TMP=1
#DELETE_TMP="${REMOVE_TMP:-1}"
DELETE_TMP=0
In theory, if the second line was left uncommented, then setting the
environment variable REMOVE_TMP to 0 would make DELETE_TMP change from 1
to 0. Otherwise, it would default to 1.
Here's a simple example script, which shows the idea, but I can't seem
to get it to work in that big script.
drkir...@kestrel:[~] $ cat assign
#!/bin/bash
DELETE_TMP="${REMOVE_TMP:-1}"
echo "DELETE_TMP=$DELETE_TMP"
drkir...@kestrel:[~] $ ./assign
DELETE_TMP=1
drkir...@kestrel:[~] $ export REMOVE_TMP=0
drkir...@kestrel:[~] $ ./assign
DELETE_TMP=0
drkir...@kestrel:[~] $ export REMOVE_TMP=
drkir...@kestrel:[~] $ ./assign
DELETE_TMP=1
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