This blog is updated daily..
A general description is here.
Package help is now converted from Rd by the R-based converters that were first introduced in 2.9.0. This means
- Packages that were installed by R-devel after 2009-08-09 should not be used with earlier versions of R, and some aspects of package help will be missing if there are so used. (Text and latex help and the runnable examples.)
- Text help,, HTML and latex help and examples for packages installed under the new system is converted on-demand from stored parsed Rd files. (Conversions stored in R < 2.10.0 are used if no parsed Rd files are found.)
The converters are still being polished; but almost all errors in packages are previously undetected/corrected errors in the package sources or changes in the Rd dialect.
HTML help is now generated dynamically using a httpHTTP server running in the R process and listening on the loopback interface.
- The implementation is currently innot quite complete.
- Those who need to worry about security implications of such a server can disable it by setting the environment variable R_DISABLE_HTTPD to a non-empty value.
- Those using the server do not need to build or install static HTML pages and can useThey may want to build static HTML pages, which is done by the configure option --disenable-prebuilt-html. This sets (which adds --html to the default for installing packages.).
- If the server is disabled and there are no static HTML pages, a HTML help page wthout links is generated dynamically.
- The documentation has not caught up with this set of changes: das a file:// URL.
- Details may change before release.
R_ReplDLLinit() initializes top-level jump so that embedding applications on Windows no longer crash on error.