[Swift-devel] problems with external dependencies

[Michael Wilde]

I meant I was expecting:

SwiftScript trace: I am populateDatabase
Progress:  Selecting site:7 Stage in:1 Finished successfully:2
Progress:  Selecting site:2 Stage in:1 Active:1 Finished successfully:6
SwiftScript trace: i am analyseDatabase
Final status:  Finished successfully:10
sur$


On 3/22/09 4:28 PM, Michael Wilde wrote:
> Im trying to adapt the example of external dependencies in the user 
> guide to enable me to wait for a procedure that does lot of parallel 
> work to complete, and then analyze its results.
> 
> Im trying this approach, instead of ordinary dependencies, because the 
> list of datasets produced in the parallel operations exceeds the command 
> line length limits of wrapper.sh.
> 
> So Im trying to use externals to indicate that the parallel work has 
> completed, then call a local analysis script with just one item from the 
> parallel outputs, and this script will then locate all the other outputs 
> with similar names by perusing a local directory passed as a string. 
> (theres a few more elegant variants on this, but this simple hack will 
> suffice for the current need).
> 
> Problem is that in the following test example to see if this will work, 
> the script does not seem to wait for the echo app invocations to 
> complete before running the final trace() function:
> 
> type file;
> 
> app (file o) echo (int i) { echo i stdout=@o; }
> 
> (external o) populateDatabase() {
>   trace("I am populateDatabase");
>   int j[] = [0:9];
>   file r[];
>   foreach i in j {
>     r[i] = echo(i);
>   }
> }
> 
> analyseDatabase(external i) {
>   trace("i am analyseDatabase");
> }
> 
> external database;
> 
> database = populateDatabase();
> analyseDatabase(database);
> 
> ---
> 
> Instead, I get:
> 
> Swift svn swift-r2724 (swift modified locally) cog-r2333
> 
> RunID: 20090322-1553-ltauz86a
> Progress:
> SwiftScript trace: i am analyseDatabase
> SwiftScript trace: I am populateDatabase
> Progress:  Selecting site:7 Stage in:1 Finished successfully:2
> Progress:  Selecting site:2 Stage in:1 Active:1 Finished successfully:6
> Final status:  Finished successfully:10
> sur$
> 
> ---
> while I was expecting:
> 
> 
> SwiftScript trace: i am analyseDatabase
> SwiftScript trace: I am populateDatabase
> Progress:  Selecting site:7 Stage in:1 Finished successfully:2
> Progress:  Selecting site:2 Stage in:1 Active:1 Finished successfully:6
> Final status:  Finished successfully:10
> sur$
> 
> 
> -- 
> 
> Ive been trying the same with an array of externals, to no avail (yet).
> 
> Can you offer any guidance on how to do this, or whether its possible 
> with the current implementation of external?
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