docker-machine-driver-xhyve: fix libev issue

Close #6678

Formula/docker-machine-driver-xhyve.rb

@@ -20,9 +20,12 @@ class DockerMachineDriverXhyve < Formula
   depends_on "docker-machine" => :recommended
   if build.with? "qcow2"
     depends_on "opam"
-    depends_on "libev"
+    depends_on "libev" => :build
   end
 
+  # Allow specifying version and libev location.
+  patch :DATA
+
   def install
     (buildpath/"gopath/src/github.com/zchee/docker-machine-driver-xhyve").install Dir["{*,.git,.gitignore,.gitmodules}"]
 
@@ -38,8 +41,12 @@ def install
 
       if build.with? "qcow2"
         build_tags << " qcow2"
+        ENV["LIBEV_FILE"] = "#{Formula["libev"].lib}/libev.a"
+
         system "opam", "init", "--no-setup"
         opam_dir = "#{buildpath}/.brew_home/.opam"
+
+        # To imitate 'eval `opam init`'
         ENV["CAML_LD_LIBRARY_PATH"] = "#{opam_dir}/system/lib/stublibs:/usr/local/lib/ocaml/stublibs"
         ENV["OPAMUTF8MSGS"] = "1"
         ENV["PERL5LIB"] = "#{opam_dir}/system/lib/perl5"
@@ -48,11 +55,11 @@ def install
         system "opam", "install", "-y", "uri", "qcow-format", "conf-libev"
       end
 
-      go_ldflags = "-w -s -X 'github.com/zchee/docker-machine-driver-xhyve/xhyve.GitCommit=Homebrew#{git_hash}'"
+      go_ldflags = "-w -s -X=github.com/zchee/docker-machine-driver-xhyve/xhyve.GitCommit=Homebrew-#{git_hash}"
       ENV["GO_LDFLAGS"] = go_ldflags
       ENV["GO_BUILD_TAGS"] = build_tags
       system "make", "lib9p"
-      system "make", "build"
+      system "make", "build", "V=1"
       bin.install "bin/docker-machine-driver-xhyve"
     end
   end
@@ -70,3 +77,29 @@ def caveats; <<-EOS.undent
     shell_output("#{Formula["docker-machine"].bin}/docker-machine create --driver xhyve -h")
   end
 end
+
+__END__
+diff --git a/Makefile b/Makefile
+index d6448d0..8c26cf7 100644
+--- a/Makefile
++++ b/Makefile
+@@ -78,7 +78,7 @@ CGO_CFLAGS :=
+ CGO_LDFLAGS :=
+
+ # Parse git current branch commit-hash
+-GO_LDFLAGS += -X `go list ./xhyve`.GitCommit=`git rev-parse --short HEAD 2>/dev/null`
++GO_LDFLAGS ?= -X `go list ./xhyve`.GitCommit=`git rev-parse --short HEAD 2>/dev/null`
+
+
+ # Set debug gcflag, or optimize ldflags
+@@ -126,8 +126,8 @@ endif
+ # Use mirage-block for pwritev|preadv
+ HAVE_OCAML_QCOW := $(shell if ocamlfind query qcow uri >/dev/null 2>/dev/null ; then echo YES ; else echo NO; fi)
+ ifeq ($(HAVE_OCAML_QCOW),YES)
+-LIBEV_FILE=/usr/local/lib/libev.a
+-LIBEV=$(shell if test -e $(LIBEV_FILE) ; then echo $(LIBEV_FILE) ; fi )
++LIBEV_FILE ?= /usr/local/lib/libev.a
++LIBEV = $(shell if test -e $(LIBEV_FILE) ; then echo $(LIBEV_FILE) ; fi )
+ OCAML_WHERE := $(shell ocamlc -where)
+ OCAML_LDLIBS := -L $(OCAML_WHERE) \
+ 	$(shell ocamlfind query cstruct)/cstruct.a \