Andrew Johnson wrote:
Emmanuel Mayssat wrote:
I use "dbLoad" files such as this one:
<snip>
Now, I would like to include in my dbl files a command that says:
If this variable is not set, then set it to this value.
This technique appears to be somewhat fragile (meaning you must be
careful if you decide to use it). It's probably fine if you have a
small number of .dbl files and can keep track of all the variables that
each one needs, but what happens if you should re-use a variable name
(with different default values) in two different dbl files? The first
dbl file would set the value it wants as the default, but the second
file would always see the earlier file's default setting (because the
variable was never unset), even if the user really wanted to use the
second dbl file's default. Swapping the order in which you execute the
two dbl files would change what is loaded into the database!
I would suggest that you require that the parent script must set *all*
parameters that a dbl file relies on itself, or load a single default
settings file early on like Eric suggested.
If you don't intend to change it once the iocInit is done, why not
get it in at the "make" stage, and substitute the variables there,
allowing you to check in the built script what you're actually going
to end up with in the ioc?
Maren
- References:
- if-then-else in iocsh Emmanuel Mayssat
- Re: if-then-else in iocsh Andrew Johnson
- Re: if-then-else in iocsh Maren Purves
- Re: if-then-else in iocsh Emmanuel Mayssat
- Re: if-then-else in iocsh Andrew Johnson
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