simple nofuse build tag

Makefile

@@ -16,6 +16,9 @@ install:
 build:
 	cd cmd/ipfs && go build -i
 
+nofuse:
+	cd cmd/ipfs && go install -tags nofuse
+
 ##############################################################
 # tests targets
 

core/commands/mount_nofuse.go

@@ -0,0 +1,28 @@
+// +build (linux darwin freebsd) and nofuse
+
+package commands
+
+import (
+	"errors"
+
+	cmds "github.com/jbenet/go-ipfs/commands"
+	"github.com/jbenet/go-ipfs/core"
+)
+
+var MountCmd = &cmds.Command{
+	Helptext: cmds.HelpText{
+		Tagline: "Mounts IPFS to the filesystem (disabled)",
+		ShortDescription: `
+This version of ipfs is compiled without fuse support, which is required
+for mounting. If you'd like to be able to mount, please use a version of
+ipfs compiled with fuse.
+
+For the latest instructions, please check the project's repository:
+  http://github.com/jbenet/go-ipfs
+`,
+	},
+}
+
+func Mount(node *core.IpfsNode, fsdir, nsdir string) error {
+	return errors.New("not compiled in")
+}

core/commands/mount_unix.go

@@ -1,4 +1,4 @@
-// +build linux darwin freebsd
+// +build (linux darwin freebsd) and !nofuse
 
 package commands
 

fuse/ipns/common.go

@@ -0,0 +1,37 @@
+package ipns
+
+import (
+	"github.com/jbenet/go-ipfs/core"
+	mdag "github.com/jbenet/go-ipfs/merkledag"
+	nsys "github.com/jbenet/go-ipfs/namesys"
+	ci "github.com/jbenet/go-ipfs/p2p/crypto"
+	ft "github.com/jbenet/go-ipfs/unixfs"
+)
+
+// InitializeKeyspace sets the ipns record for the given key to
+// point to an empty directory.
+func InitializeKeyspace(n *core.IpfsNode, key ci.PrivKey) error {
+	emptyDir := &mdag.Node{Data: ft.FolderPBData()}
+	nodek, err := n.DAG.Add(emptyDir)
+	if err != nil {
+		return err
+	}
+
+	err = n.Pinning.Pin(emptyDir, false)
+	if err != nil {
+		return err
+	}
+
+	err = n.Pinning.Flush()
+	if err != nil {
+		return err
+	}
+
+	pub := nsys.NewRoutingPublisher(n.Routing)
+	err = pub.Publish(n.Context(), key, nodek)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

fuse/ipns/ipns_test.go

@@ -1,15 +1,17 @@
+// +build !nofuse
+
 package ipns
 
 import (
 	"bytes"
 	"crypto/rand"
-	context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/golang.org/x/net/context"
 	"io/ioutil"
 	"os"
 	"testing"
 	"time"
 
 	fstest "github.com/jbenet/go-ipfs/Godeps/_workspace/src/bazil.org/fuse/fs/fstestutil"
+	context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/golang.org/x/net/context"
 
 	core "github.com/jbenet/go-ipfs/core"
 	u "github.com/jbenet/go-ipfs/util"

fuse/ipns/ipns_unix.go

@@ -1,3 +1,5 @@
+// +build !nofuse
+
 // package fuse/ipns implements a fuse filesystem that interfaces
 // with ipns, the naming system for ipfs.
 package ipns
@@ -18,7 +20,6 @@ import (
 	core "github.com/jbenet/go-ipfs/core"
 	chunk "github.com/jbenet/go-ipfs/importer/chunk"
 	mdag "github.com/jbenet/go-ipfs/merkledag"
-	nsys "github.com/jbenet/go-ipfs/namesys"
 	ci "github.com/jbenet/go-ipfs/p2p/crypto"
 	path "github.com/jbenet/go-ipfs/path"
 	ft "github.com/jbenet/go-ipfs/unixfs"
@@ -37,34 +38,6 @@ var (
 	longRepublishTimeout  = time.Millisecond * 500
 )
 
-// InitializeKeyspace sets the ipns record for the given key to
-// point to an empty directory.
-func InitializeKeyspace(n *core.IpfsNode, key ci.PrivKey) error {
-	emptyDir := &mdag.Node{Data: ft.FolderPBData()}
-	nodek, err := n.DAG.Add(emptyDir)
-	if err != nil {
-		return err
-	}
-
-	err = n.Pinning.Pin(emptyDir, false)
-	if err != nil {
-		return err
-	}
-
-	err = n.Pinning.Flush()
-	if err != nil {
-		return err
-	}
-
-	pub := nsys.NewRoutingPublisher(n.Routing)
-	err = pub.Publish(n.Context(), key, nodek)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
 // FileSystem is the readwrite IPNS Fuse Filesystem.
 type FileSystem struct {
 	Ipfs     *core.IpfsNode

fuse/ipns/link_unix.go

@@ -1,3 +1,5 @@
+// +build !nofuse
+
 package ipns
 
 import (

fuse/ipns/mount_unix.go

@@ -1,4 +1,4 @@
-// +build linux darwin freebsd
+// +build (linux darwin freebsd) and !nofuse
 
 package ipns
 

fuse/ipns/repub_unix.go

@@ -1,3 +1,5 @@
+// +build !nofuse
+
 package ipns
 
 import "time"

fuse/mount/fuse.go

@@ -0,0 +1,121 @@
+// +build !nofuse
+
+package mount
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/jbenet/go-ipfs/Godeps/_workspace/src/bazil.org/fuse"
+	"github.com/jbenet/go-ipfs/Godeps/_workspace/src/bazil.org/fuse/fs"
+	"github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-ctxgroup"
+)
+
+// mount implements go-ipfs/fuse/mount
+type mount struct {
+	mpoint   string
+	filesys  fs.FS
+	fuseConn *fuse.Conn
+	// closeErr error
+
+	cg ctxgroup.ContextGroup
+}
+
+// Mount mounts a fuse fs.FS at a given location, and returns a Mount instance.
+// parent is a ContextGroup to bind the mount's ContextGroup to.
+func NewMount(p ctxgroup.ContextGroup, fsys fs.FS, mountpoint string) (Mount, error) {
+	conn, err := fuse.Mount(mountpoint)
+	if err != nil {
+		return nil, err
+	}
+
+	m := &mount{
+		mpoint:   mountpoint,
+		fuseConn: conn,
+		filesys:  fsys,
+		cg:       ctxgroup.WithParent(p), // link it to parent.
+	}
+	m.cg.SetTeardown(m.unmount)
+
+	// launch the mounting process.
+	if err := m.mount(); err != nil {
+		m.Unmount() // just in case.
+		return nil, err
+	}
+
+	return m, nil
+}
+
+func (m *mount) mount() error {
+	log.Infof("Mounting %s", m.MountPoint())
+
+	errs := make(chan error, 1)
+	go func() {
+		err := fs.Serve(m.fuseConn, m.filesys)
+		log.Debugf("Mounting %s -- fs.Serve returned (%s)", err)
+		errs <- err
+		close(errs)
+	}()
+
+	// wait for the mount process to be done, or timed out.
+	select {
+	case <-time.After(MountTimeout):
+		return fmt.Errorf("Mounting %s timed out.", m.MountPoint())
+	case err := <-errs:
+		return err
+	case <-m.fuseConn.Ready:
+	}
+
+	// check if the mount process has an error to report
+	if err := m.fuseConn.MountError; err != nil {
+		return err
+	}
+
+	log.Infof("Mounted %s", m.MountPoint())
+	return nil
+}
+
+// umount is called exactly once to unmount this service.
+// note that closing the connection will not always unmount
+// properly. If that happens, we bring out the big guns
+// (mount.ForceUnmountManyTimes, exec unmount).
+func (m *mount) unmount() error {
+	log.Infof("Unmounting %s", m.MountPoint())
+
+	// try unmounting with fuse lib
+	err := fuse.Unmount(m.MountPoint())
+	if err == nil {
+		return nil
+	}
+	log.Debug("fuse unmount err: %s", err)
+
+	// try closing the fuseConn
+	err = m.fuseConn.Close()
+	if err == nil {
+		return nil
+	}
+	if err != nil {
+		log.Debug("fuse conn error: %s", err)
+	}
+
+	// try mount.ForceUnmountManyTimes
+	if err := ForceUnmountManyTimes(m, 10); err != nil {
+		return err
+	}
+
+	log.Infof("Seemingly unmounted %s", m.MountPoint())
+	return nil
+}
+
+func (m *mount) CtxGroup() ctxgroup.ContextGroup {
+	return m.cg
+}
+
+func (m *mount) MountPoint() string {
+	return m.mpoint
+}
+
+func (m *mount) Unmount() error {
+	// call ContextCloser Close(), which calls unmount() exactly once.
+	return m.cg.Close()
+}