Make setUlimit a noop on Windows.

ibazel/BUILD

@@ -33,6 +33,8 @@ go_library(
         "ibazel.go",
         "lifecycle.go",
         "main.go",
+        "main_unix.go",
+        "main_windows.go",
         "source_event_handler.go",
     ],
     importpath = "github.com/bazelbuild/bazel-watcher/ibazel",

ibazel/main.go

@@ -19,7 +19,6 @@ import (
 	"fmt"
 	"os"
 	"strings"
-	"syscall"
 	"time"
 )
 
@@ -149,24 +148,3 @@ func handle(i *IBazel, command string, args []string) {
 		return
 	}
 }
-
-func setUlimit() error {
-	var lim syscall.Rlimit
-
-	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &lim)
-	if err != nil {
-		return err
-	}
-
-	// set the "soft" file descriptor to the maximum
-	// allowed by a userspace program.
-	// http://man7.org/linux/man-pages/man2/getrlimit.2.html
-	lim.Cur = lim.Max
-
-	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &lim)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}

ibazel/main_unix.go

@@ -0,0 +1,40 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !windows
+
+package main
+
+import "syscall"
+
+func setUlimit() error {
+	var lim syscall.Rlimit
+
+	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &lim)
+	if err != nil {
+		return err
+	}
+
+	// set the "soft" file descriptor to the maximum
+	// allowed by a userspace program.
+	// http://man7.org/linux/man-pages/man2/getrlimit.2.html
+	lim.Cur = lim.Max
+
+	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &lim)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

ibazel/main_windows.go

@@ -0,0 +1,19 @@
+// Copyright 2017 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+func setUlimit() error {
+	return nil
+}