I am using TexLive 2015 on OS X.
tlmgr info latex reports that I have the latest latex version
$> tlmgr info latex package: latex category: Package shortdesc: A TeX macro package that defines LaTeX longdesc: LaTeX is a widely-used macro package for TeX, providing many basic document formating commands extended by a wide range of packages. It is a development of Leslie Lamport's LaTeX 2.09, and superseded the older system in June 1994. The basic distribution is catalogued separately, at latex-base; apart from a large set of contributed packages and third-party documentation (elsewhere on the archive), the distribution includes: - a bunch of required packages, which LaTeX authors are "entitled to assume" will be present on any system running LaTeX; and - a minimal set of documentation detailing differences from the 'old' version of LaTeX in the areas of user commands, font selection and control, class and package writing, font encodings, configuration options and modification of LaTeX. For downloading details, see the linked catalogue entries above. installed: Yes revision: 38732 sizes: src: 2909k, doc: 14809k, run: 2793k relocatable: No cat-date: 2015-08-03 05:43:12 +0200 cat-license: lppl1.3 cat-topics: format collection: collection-latex
But when I use lualatex against a document, the reported LaTeX version is
$> lualatex examples/amiri-sample.tex This is LuaTeX, Version beta-0.80.1 (TeX Live 2015) (rev 5253) restricted \write18 enabled. (./examples/amiri-sample.tex LaTeX2e <2015/01/01> Babel <3.9l> and hyphenation patterns for 79 languages loaded. (/usr/local/texlive/2015/texmf-dist/tex/latex/base/article.cls Document Class: article 2014/09/29 v1.4h Standard LaTeX document class (/usr/local/texlive/2015/texmf-dist/tex/latex/base/size10.clo)) (./harfbuzz.sty …
What could be the reasons for this discrepancy.