#2873 verify "replace file" action with mashup

[Jeremy Faden]

Ivar has a case where the "replace file" action doesn't seem to work with mash-up URIs, see runtime error submission rte_0505560822. He says it could be a problem elsewhere in the .vap, but I haven't thought about this action in years and it's probably a good time to verify.

[Jeremy Faden]

1. plot vap+inline:ds=getDataSet('https://autoplot.org/data/agg/efi/2000/po_k0_efi_20000103_v01.cdf?POTENT')&add(ds,30)
2. [Menubar]→Tools→"Replace File..."
3. I'm getting a NullPointerException now, and a local file had a different error.

[Jeremy Faden]

1. plot vap+inline:ds=getDataSet('file:///home/jbf/data/1wire/gardenhousepi/hapi_home/data/10.CF3744000800/2018/10.CF3744000800.20180106.csv')&add(ds,20)
2. [Menubar]→Tools→"Replace File..."
3. "URI should refer to a file, but this doesn't" message

[Jeremy Faden]

There is no special handling of vap+inline URIs, and there probably should be. I've started this.

[Jeremy Faden]

vap+inline URIs with one getDataSet call now support this.

[Jeremy Faden]

It would be nice to detect when several variables are read from one file.