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.vim/autoload/xolox/misc/version.vim

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+" Version string handling.
+"
+" Author: Peter Odding <peter@peterodding.com>
+" Last Change: June 22, 2013
+" URL: http://peterodding.com/code/vim/misc/
+
+function! xolox#misc#version#parse(version_string)
+  " Convert a version string to a list of integers.
+  let result = map(split(a:version_string, '\.'), 'v:val + 0')
+  call xolox#misc#msg#debug("vim-misc %s: Parsed version string %s into %s.", g:xolox#misc#version, string(a:version_string), string(result))
+  return result
+endfunction
+
+function! xolox#misc#version#at_least(expected_version, available_version)
+  " Check whether the second version string is equal to or greater than the
+  " first version string. Returns 1 (true) when it is, 0 (false) otherwise.
+  let expected_version = xolox#misc#version#parse(a:expected_version)
+  let available_version = xolox#misc#version#parse(a:available_version)
+  for idx in range(max([len(expected_version), len(available_version)]))
+    let expected_number = get(expected_version, idx, 0)
+    let available_number = get(available_version, idx, 0)
+    if available_number > expected_number
+      call xolox#misc#msg#debug("vim-misc %s: Available version (%s) is higher than expected version (%s).", g:xolox#misc#version, a:available_version, a:expected_version)
+      return 1
+    elseif available_number < expected_number
+      call xolox#misc#msg#debug("vim-misc %s: Available version (%s) is lower than expected version (%s).", g:xolox#misc#version, a:available_version, a:expected_version)
+      return 0
+    endif
+  endfor
+  call xolox#misc#msg#debug("vim-misc %s: Available version (%s) is equal to expected version (%s).", g:xolox#misc#version, a:available_version, a:expected_version)
+  return 1
+endfunction
+
+" vim: ts=2 sw=2 et