[jira] [Updated] (DAFFODIL-576) CLI: Gracefully handle trailing flags

["Mike Beckerle (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DAFFODIL-576?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mike Beckerle updated DAFFODIL-576:
-----------------------------------
    Labels: beginner  (was: )

> CLI: Gracefully handle trailing flags
> -------------------------------------
>
>                 Key: DAFFODIL-576
>                 URL: https://issues.apache.org/jira/browse/DAFFODIL-576
>             Project: Daffodil
>          Issue Type: Bug
>          Components: CLI, Usability
>    Affects Versions: s7
>            Reporter: Jessie Chab
>            Priority: Minor
>              Labels: beginner
>
> I was running pcap tests with the CLI and I wanted to save the output to a file so I could copy it over to a TDML file. I added "-o outfile" to my command, not thinking about the fact that it came after the infile trailing argument. Depending on the file I was parsing I got one of the following errors:
> org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; {color:red}Content is not allowed in prolog.{color}
> 	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
> 	at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
> 	at edu.illinois.ncsa.daffodil.xml.DaffodilXMLLoader.loadXML(DaffodilXMLLoader.scala:435)
> 	at scala.xml.factory.XMLLoader$class.load(XMLLoader.scala:56)
> ........
> org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; {color:red}Invalid byte 2 of 2-byte UTF-8 sequence.{color}
> 	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
> 	at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
> 	at edu.illinois.ncsa.daffodil.xml.DaffodilXMLLoader.loadXML(DaffodilXMLLoader.scala:435)
> 	at scala.xml.factory.XMLLoader$class.load(XMLLoader.scala:56)
> Would it be possible for the CLI to either acknowledge a flagless argument as an infile, so the arguments can be in any ordering, or to catch this kind of situation and alert the user that there cannot be arguments after the infile before trying to parse?



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