made the pack completely portable and wrote relevent bat files to go with it

gitportable/usr/share/vim/vim91/syntax/opam.vim

@@ -0,0 +1,74 @@
+" Vim syntax file
+" Language:    opam - OCaml package manager
+" Maintainer:  Markus Mottl        <markus.mottl@gmail.com>
+" URL:         https://github.com/ocaml/vim-ocaml
+" Last Change:
+"              2020 Dec 31 - Added header (Markus Mottl)
+
+if exists("b:current_syntax")
+  finish
+endif
+
+" need %{vars}%
+" env: [[CAML_LD_LIBRARY_PATH = "%{lib}%/stublibs"]]
+syn iskeyword a-z,A-Z,-
+syn keyword opamKeyword1 author
+syn keyword opamKeyword1 authors
+syn keyword opamKeyword1 available
+syn keyword opamKeyword1 bug-reports
+syn keyword opamKeyword1 build
+syn keyword opamKeyword1 build-env
+syn keyword opamKeyword1 conflict-class
+syn keyword opamKeyword1 conflicts
+syn keyword opamKeyword1 depends
+syn keyword opamKeyword1 depexts
+syn keyword opamKeyword1 depopts
+syn keyword opamKeyword1 description
+syn keyword opamKeyword1 dev-repo
+syn keyword opamKeyword1 doc
+syn keyword opamKeyword1 extra-files
+syn keyword opamKeyword1 features
+syn keyword opamKeyword1 flags
+syn keyword opamKeyword1 homepage
+syn keyword opamKeyword1 install
+syn keyword opamKeyword1 libraries
+syn keyword opamKeyword1 license
+syn keyword opamKeyword1 maintainer
+syn keyword opamKeyword1 messages
+syn keyword opamKeyword1 name
+syn keyword opamKeyword1 opam-version
+syn keyword opamKeyword1 patches
+syn keyword opamKeyword1 pin-depends
+syn keyword opamKeyword1 post-messages
+syn keyword opamKeyword1 remove
+syn keyword opamKeyword1 run-test
+syn keyword opamKeyword1 setenv
+syn keyword opamKeyword1 substs
+syn keyword opamKeyword1 synopsis
+syn keyword opamKeyword1 syntax
+syn keyword opamKeyword1 tags
+syn keyword opamKeyword1 version
+
+syn keyword opamTodo FIXME NOTE NOTES TODO XXX contained
+syn match opamComment "#.*$" contains=opamTodo,@Spell
+syn match opamOperator ">\|<\|=\|<=\|>="
+
+syn match opamUnclosedInterpolate "%{[^ "]*" contained
+syn match opamInterpolate         "%{[^ "]\+}%" contained
+syn region opamString start=/"/ end=/"/ contains=opamInterpolate,OpamUnclosedInterpolate
+syn region opamSeq start=/\[/ end=/\]/ contains=ALLBUT,opamKeyword1
+syn region opamExp start=/{/ end=/}/ contains=ALLBUT,opamKeyword1
+
+hi link opamKeyword1 Keyword
+
+hi link opamString String
+hi link opamExp Function
+hi link opamSeq Statement
+hi link opamOperator Operator
+hi link opamComment Comment
+hi link opamInterpolate Identifier
+hi link opamUnclosedInterpolate Error
+
+let b:current_syntax = "opam"
+
+" vim: ts=2 sw=2