Description Simon Arsenault 2002-06-21 13:55:28 EDT

The Ant ui does it own parsing of the build file to get the list of targets. It 
cannot use the ProjectHelper class from Ant because the Ant version shipped 
with Eclipse (as of release 2.0) is version 1.4, and that version does not 
handle 1.5 Ant build files.

When parsing the file, we tell the parser what the base directory is and also 
provide an EntityResolver to handle SYSTEM values with start with the 
protocol "file:" All other values are left to the XML parser to handle.

Unfortunately, not all XML parser will handle relative paths such 
as "../../common.xml" properly. It seems to depend on the JRE being used and 
which parser is registered to be used. The org.apache.crimson parser is one 
that will not handle relative paths properly (it seems to want a valid URI 
only).

We need to update our Entity Resolver to handle this case and not leave it to 
the default parser. In other words, it should handle values that start 
with "file:" or values that do not have a protocol in front of it 
(like "../../common.xml"). It is very important that we do not handle values 
with other protocol (like "http:", etc).

The AntRunner will also parse the build file when asked to run it. However, it 
uses the SAXParser always and has it's own Entity Resolver, so it does not have 
this problem - build files always seen to run correctly.

For background reference, please see the following problem reports (bug 18692 
and bug 20635)