From a0d72fb00c5ab2d1a48fd7d9ce35349aa1ba3db1 Mon Sep 17 00:00:00 2001
From: Barak Michener <me@barakmich.com>
Date: Thu, 18 Dec 2014 13:44:29 -0500
Subject: [PATCH] Fix building the lock on windows

---
 pkg/fileutil/{lock.go => lock_unix.go} |  2 +
 pkg/fileutil/lock_windows.go           | 57 ++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 rename pkg/fileutil/{lock.go => lock_unix.go} (97%)
 create mode 100644 pkg/fileutil/lock_windows.go

diff --git a/pkg/fileutil/lock.go b/pkg/fileutil/lock_unix.go
similarity index 97%
rename from pkg/fileutil/lock.go
rename to pkg/fileutil/lock_unix.go
index d3c8e9eff..ccf5106c5 100644
--- a/pkg/fileutil/lock.go
+++ b/pkg/fileutil/lock_unix.go
@@ -1,3 +1,5 @@
+// +build !windows,!plan9
+
 package fileutil
 
 import (
diff --git a/pkg/fileutil/lock_windows.go b/pkg/fileutil/lock_windows.go
new file mode 100644
index 000000000..cdd4e7795
--- /dev/null
+++ b/pkg/fileutil/lock_windows.go
@@ -0,0 +1,57 @@
+// +build windows
+
+package fileutil
+
+import (
+	"errors"
+	"os"
+)
+
+var (
+	ErrLocked = errors.New("file already locked")
+)
+
+type Lock interface {
+	Name() string
+	TryLock() error
+	Lock() error
+	Unlock() error
+	Destroy() error
+}
+
+type lock struct {
+	fd   int
+	file *os.File
+}
+
+func (l *lock) Name() string {
+	return l.file.Name()
+}
+
+// TryLock acquires exclusivity on the lock without blocking
+func (l *lock) TryLock() error {
+	return nil
+}
+
+// Lock acquires exclusivity on the lock without blocking
+func (l *lock) Lock() error {
+	return nil
+}
+
+// Unlock unlocks the lock
+func (l *lock) Unlock() error {
+	return nil
+}
+
+func (l *lock) Destroy() error {
+	return l.file.Close()
+}
+
+func NewLock(file string) (Lock, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	l := &lock{int(f.Fd()), f}
+	return l, nil
+}