When rewrite rules are applied, append suffixes to avoid file name collisions

[chrispy-snps]

Description

The DITA-OT is very good about appending suffixes to avoid file name collisions during keyscope/profiling/content-reuse uniquification.

However, rewrite rules do not provide this behavior. If rewrite rules result in identical file names:

then the output uses one of them for all references:

$ ls -1 out
commonltr.css
commonrtl.css
features.html
index.html

Possible Solution

The DITA-OT rewrite rules module could detect and resolve collisions similarly to the keyscope/profiling/content-reuse features.

Potential Alternatives

As a workaround, the user could implement a multi-pass stylesheet that applies name rules in a first pass, then resolves collisions in a second pass. However, this requires some XSLT ability that perhaps not all DITA-OT users would have.

Additional Context

A testcase is included: 3958.zip

To run, type dita --project project.xml.