Upgrade to rebar3, add Windows support

This patch updates erlfdb to build using rebar3. It relies on rebar3's
`pc` plugin to build the NIF instead of the compiled copy of davisp's
erlang-native-compiler, which does essentially the same thing. I left
the rebar_gdb_plugin code in the repo, although I did not update that
plugin to make it compatible with rebar3 yet.

With rebar3 in place, I also made the changes necessary to support
Windows. One gotcha is that the unit tests will fail unless you set
the erlfdb test_cluster_file environment variable to point to a running
fdb.cluster file. I didn't get through all the hoops to make the
approach of spinning up an embedded fdbserver work in a x-platform way.
Apparently Windows doesn't let you supply a Python script for the
spawn_executable argument of erlang:open_port/2. I added a rebar3
profile to help here. The following command will cause the test suite
to connect to an FDB server that is managing its configuration in the
default location on Windows:

  rebar3 as win32_external_fdbserver eunit

.gitignore

@@ -1,12 +1,12 @@
-
+# Unit testing
+.erlfdb/
 .eunit/
-.rebar/
 
 compile_commands.json
 erln8.config
 
+# Build artifacts
 c_src/*.d
 c_src/*.o
-ebin/
-
 priv/erlfdb_nif.*
+_build/

Makefile

@@ -1,10 +1,11 @@
 all: check
 
 build:
-	rebar compile
+	@rebar3 compile
 
 check: build
-	rebar eunit
+	@rebar3 eunit
 
 clean:
-	rebar clean
+	@rebar3 clean
+	@rm -rf _build

rebar.config

@@ -1,22 +1,43 @@
+{plugins, [
+    pc
+]}.
+
+{provider_hooks, [
+    {pre, [
+        {compile, {pc, compile}},
+        {clean, {pc, clean}}
+    ]}
+]}.
+
 {port_specs, [
     {"priv/erlfdb_nif.so", ["c_src/*.c"]}
 ]}.
 
-{plugins, [rebar_gdb_plugin]}.
-
 {port_env, [
     {"(linux|solaris|freebsd|netbsd|openbsd|dragonfly|darwin|gnu)",
         "CFLAGS", "$CFLAGS -I/usr/local/include -Ic_src/ -g -Wall -Werror"},
     {"(linux|solaris|freebsd|netbsd|openbsd|dragonfly|darwin|gnu)",
         "CXXFLAGS", "$CXXFLAGS -I/usr/local/include -Ic_src/ -g -Wall -Werror"},
+    {"win32",
+        "CFLAGS", "$CFLAGS /I\"c:/Program Files/foundationdb/include\" /O2 /DNDEBUG"},
+    {"win32",
+        "CXXFLAGS", "$CXXFLAGS /I\"c:/Program Files/foundationdb/include\" /O2 /DNDEBUG"},
 
     {"(linux|solaris|freebsd|netbsd|openbsd|dragonfly|darwin|gnu)",
-        "LDFLAGS", "$LDFLAGS -L/usr/local/lib -lfdb_c"}
+        "LDFLAGS", "$LDFLAGS -L/usr/local/lib -lfdb_c"},
+    {"win32",
+        "LDFLAGS", "$LDFLAGS /LIBPATH:\"c:/Program Files/foundationdb/lib/foundationdb\" fdb_c.lib"}
+]}.
+
+{profiles, [
+    {win32_external_fdbserver, [
+        {eunit_opts, [
+            {sys_config, "win32_external_fdbserver.config"}
+        ]}
+    ]}
 ]}.
 
 {eunit_opts, [
+    debug_info,
     verbose
 ]}.
-
-{pre_hooks, [{"", compile, "escript enc compile"}]}.
-{post_hooks, [{"", clean, "escript enc clean"}]}.

rebar.lock

@@ -0,0 +1 @@
+[].

src/erlfdb_util.erl

@@ -215,9 +215,10 @@ init_fdb_db(ClusterFile, Options) ->
     DefaultFDBCli = os:find_executable("fdbcli"),
     FDBCli = case ?MODULE:get(Options, fdbcli_bin, DefaultFDBCli) of
         false -> erlang:error(fdbcli_not_found);
+        DefaultFDBCli -> "fdbcli";
         FDBCli0 -> FDBCli0
     end,
-    Fmt = "~s -C ~s --exec 'configure new single ssd'",
+    Fmt = "~s -C ~s --exec \"configure new single ssd\"",
     Cmd = lists:flatten(io_lib:format(Fmt, [FDBCli, ClusterFile])),
     case os:cmd(Cmd) of
         "Database created" ++ _ -> ok;

win32_external_fdbserver.config

@@ -0,0 +1,5 @@
+[
+    {erlfdb, [
+        {test_cluster_file, <<"c:/ProgramData/foundationdb/fdb.cluster">>}
+    ]}
+].