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-rw-r--r--Library/Homebrew/version.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/Library/Homebrew/version.rb b/Library/Homebrew/version.rb
index d3f0417b0..49296a142 100644
--- a/Library/Homebrew/version.rb
+++ b/Library/Homebrew/version.rb
@@ -328,6 +328,13 @@ class Version
m = /-(\d+\.\d+(?:\.\d+)?)-w(?:in)?(?:32|64)$/.match(stem)
return m.captures.first unless m.nil?
+ # Opam packages
+ # e.g. https://opam.ocaml.org/archives/sha.1.9+opam.tar.gz
+ # e.g. https://opam.ocaml.org/archives/lablgtk.2.18.3+opam.tar.gz
+ # e.g. https://opam.ocaml.org/archives/easy-format.1.0.2+opam.tar.gz
+ m = /\.(\d+\.\d+(?:\.\d+)?)\+opam$/.match(stem)
+ return m.captures.first unless m.nil?
+
# e.g. http://ftpmirror.gnu.org/mtools/mtools-4.0.18-1.i686.rpm
# e.g. http://ftpmirror.gnu.org/autogen/autogen-5.5.7-5.i386.rpm
# e.g. http://ftpmirror.gnu.org/libtasn1/libtasn1-2.8-x86.zip