Godeps, vendor: convert dependency management to trash (#3198)

This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.

1 files changed, 192 insertions, 0 deletions

diff --git a/vendor/github.com/rjeczalik/notify/watcher_kqueue.go b/vendor/github.com/rjeczalik/notify/watcher_kqueue.go
new file mode 100644
index 000000000..d5f7788c4
--- /dev/null
+++ b/vendor/github.com/rjeczalik/notify/watcher_kqueue.go
@@ -0,0 +1,192 @@
+// Copyright (c) 2014-2015 The Notify Authors. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+// +build darwin,kqueue dragonfly freebsd netbsd openbsd
+
+package notify
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+)
+
+// newTrigger returns implementation of trigger.
+func newTrigger(pthLkp map[string]*watched) trigger {
+	return &kq{
+		pthLkp: pthLkp,
+		idLkp:  make(map[int]*watched),
+	}
+}
+
+// kq is a structure implementing trigger for kqueue.
+type kq struct {
+	// fd is a kqueue file descriptor
+	fd int
+	// pipefds are file descriptors used to stop `Kevent` call.
+	pipefds [2]int
+	// idLkp is a data structure mapping file descriptors with data about watching
+	// represented by them files/directories.
+	idLkp map[int]*watched
+	// pthLkp is a structure mapping monitored files/dir with data about them,
+	// shared with parent trg structure
+	pthLkp map[string]*watched
+}
+
+// watched is a data structure representing watched file/directory.
+type watched struct {
+	// p is a path to watched file/directory.
+	p string
+	// fd is a file descriptor for watched file/directory.
+	fd int
+	// fi provides information about watched file/dir.
+	fi os.FileInfo
+	// eDir represents events watched directly.
+	eDir Event
+	// eNonDir represents events watched indirectly.
+	eNonDir Event
+}
+
+// Stop implements trigger.
+func (k *kq) Stop() (err error) {
+	// trigger event used to interrupt Kevent call.
+	_, err = syscall.Write(k.pipefds[1], []byte{0x00})
+	return
+}
+
+// Close implements trigger.
+func (k *kq) Close() error {
+	return syscall.Close(k.fd)
+}
+
+// NewWatched implements trigger.
+func (*kq) NewWatched(p string, fi os.FileInfo) (*watched, error) {
+	fd, err := syscall.Open(p, syscall.O_NONBLOCK|syscall.O_RDONLY, 0)
+	if err != nil {
+		return nil, err
+	}
+	return &watched{fd: fd, p: p, fi: fi}, nil
+}
+
+// Record implements trigger.
+func (k *kq) Record(w *watched) {
+	k.idLkp[w.fd], k.pthLkp[w.p] = w, w
+}
+
+// Del implements trigger.
+func (k *kq) Del(w *watched) {
+	syscall.Close(w.fd)
+	delete(k.idLkp, w.fd)
+	delete(k.pthLkp, w.p)
+}
+
+func inter2kq(n interface{}) syscall.Kevent_t {
+	kq, ok := n.(syscall.Kevent_t)
+	if !ok {
+		panic(fmt.Sprintf("kqueue: type should be Kevent_t, %T instead", n))
+	}
+	return kq
+}
+
+// Init implements trigger.
+func (k *kq) Init() (err error) {
+	if k.fd, err = syscall.Kqueue(); err != nil {
+		return
+	}
+	// Creates pipe used to stop `Kevent` call by registering it,
+	// watching read end and writing to other end of it.
+	if err = syscall.Pipe(k.pipefds[:]); err != nil {
+		return nonil(err, k.Close())
+	}
+	var kevn [1]syscall.Kevent_t
+	syscall.SetKevent(&kevn[0], k.pipefds[0], syscall.EVFILT_READ, syscall.EV_ADD)
+	if _, err = syscall.Kevent(k.fd, kevn[:], nil, nil); err != nil {
+		return nonil(err, k.Close())
+	}
+	return
+}
+
+// Unwatch implements trigger.
+func (k *kq) Unwatch(w *watched) (err error) {
+	var kevn [1]syscall.Kevent_t
+	syscall.SetKevent(&kevn[0], w.fd, syscall.EVFILT_VNODE, syscall.EV_DELETE)
+
+	_, err = syscall.Kevent(k.fd, kevn[:], nil, nil)
+	return
+}
+
+// Watch implements trigger.
+func (k *kq) Watch(fi os.FileInfo, w *watched, e int64) (err error) {
+	var kevn [1]syscall.Kevent_t
+	syscall.SetKevent(&kevn[0], w.fd, syscall.EVFILT_VNODE,
+		syscall.EV_ADD|syscall.EV_CLEAR)
+	kevn[0].Fflags = uint32(e)
+
+	_, err = syscall.Kevent(k.fd, kevn[:], nil, nil)
+	return
+}
+
+// Wait implements trigger.
+func (k *kq) Wait() (interface{}, error) {
+	var (
+		kevn [1]syscall.Kevent_t
+		err  error
+	)
+	kevn[0] = syscall.Kevent_t{}
+	_, err = syscall.Kevent(k.fd, nil, kevn[:], nil)
+
+	return kevn[0], err
+}
+
+// Watched implements trigger.
+func (k *kq) Watched(n interface{}) (*watched, int64, error) {
+	kevn, ok := n.(syscall.Kevent_t)
+	if !ok {
+		panic(fmt.Sprintf("kq: type should be syscall.Kevent_t, %T instead", kevn))
+	}
+	if _, ok = k.idLkp[int(kevn.Ident)]; !ok {
+		return nil, 0, errNotWatched
+	}
+	return k.idLkp[int(kevn.Ident)], int64(kevn.Fflags), nil
+}
+
+// IsStop implements trigger.
+func (k *kq) IsStop(n interface{}, err error) bool {
+	return int(inter2kq(n).Ident) == k.pipefds[0]
+}
+
+func init() {
+	encode = func(e Event) (o int64) {
+		// Create event is not supported by kqueue. Instead NoteWrite event will
+		// be registered. If this event will be reported on dir which is to be
+		// monitored for Create, dir will be rescanned and Create events will
+		// be generated and returned for new files. In case of files,
+		// if not requested NoteRename event is reported, it will be ignored.
+		o = int64(e &^ Create)
+		if e&Write != 0 {
+			o = (o &^ int64(Write)) | int64(NoteWrite)
+		}
+		if e&Rename != 0 {
+			o = (o &^ int64(Rename)) | int64(NoteRename)
+		}
+		if e&Remove != 0 {
+			o = (o &^ int64(Remove)) | int64(NoteDelete)
+		}
+		return
+	}
+	nat2not = map[Event]Event{
+		NoteWrite:  Write,
+		NoteRename: Rename,
+		NoteDelete: Remove,
+		NoteExtend: Event(0),
+		NoteAttrib: Event(0),
+		NoteRevoke: Event(0),
+		NoteLink:   Event(0),
+	}
+	not2nat = map[Event]Event{
+		Write:  NoteWrite,
+		Rename: NoteRename,
+		Remove: NoteDelete,
+	}
+}