1 files changed, 84 insertions, 0 deletions
diff --git a/commands/limit_darwin.go b/commands/limit_darwin.go
new file mode 100644
index 000000000..6799f37b1
--- /dev/null
+++ b/commands/limit_darwin.go
@@ -0,0 +1,84 @@
+// Copyright 2018 The Hugo 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 commands
+
+import (
+	"syscall"
+
+	"github.com/spf13/cobra"
+	jww "github.com/spf13/jwalterweatherman"
+)
+
+var _ cmder = (*limitCmd)(nil)
+
+type limitCmd struct {
+	*baseCmd
+}
+
+func newLimitCmd() *limitCmd {
+	ccmd := &cobra.Command{
+		Use:   "ulimit",
+		Short: "Check system ulimit settings",
+		Long: `Hugo will inspect the current ulimit settings on the system.
+This is primarily to ensure that Hugo can watch enough files on some OSs`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			var rLimit syscall.Rlimit
+			err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+			if err != nil {
+				return newSystemError("Error Getting rlimit ", err)
+			}
+
+			jww.FEEDBACK.Println("Current rLimit:", rLimit)
+
+			if rLimit.Cur >= newRlimit {
+				return nil
+			}
+
+			jww.FEEDBACK.Println("Attempting to increase limit")
+			rLimit.Cur = newRlimit
+			err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+			if err != nil {
+				return newSystemError("Error Setting rLimit ", err)
+			}
+			err = syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+			if err != nil {
+				return newSystemError("Error Getting rLimit ", err)
+			}
+			jww.FEEDBACK.Println("rLimit after change:", rLimit)
+
+			return nil
+		},
+	}
+
+	return &limitCmd{baseCmd: newBaseCmd(ccmd)}
+}
+
+const newRlimit = 10240
+
+func tweakLimit() {
+	var rLimit syscall.Rlimit
+	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+	if err != nil {
+		jww.WARN.Println("Unable to get rlimit:", err)
+		return
+	}
+	if rLimit.Cur < newRlimit {
+		rLimit.Cur = newRlimit
+		err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+		if err != nil {
+			// This may not succeed, see https://github.com/golang/go/issues/30401
+			jww.INFO.Println("Unable to increase number of open files limit:", err)
+		}
+	}
+}