adjust code and dependencies

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

Dockerfile

@@ -35,6 +35,7 @@ COPY --from=xx / /
 RUN apk add --no-cache \
       docker \
       file \
+      findutils \
       git \
       make \
       protoc \

go.mod

@@ -33,6 +33,7 @@ require (
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.8.1
 	github.com/theupdateframework/notary v0.7.0
+	github.com/tilt-dev/fsnotify v1.4.8-0.20220602155310-fff9c274a375
 	go.opentelemetry.io/otel v1.12.0
 	golang.org/x/sync v0.1.0
 	gopkg.in/yaml.v2 v2.4.0
@@ -92,7 +93,7 @@ require (
 	github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect
 	github.com/miekg/pkcs11 v1.1.1 // indirect
 	github.com/moby/locker v1.0.1 // indirect
-	github.com/moby/patternmatcher v0.5.0 // indirect
+	github.com/moby/patternmatcher v0.5.0
 	github.com/moby/spdystream v0.2.0 // indirect
 	github.com/moby/sys/sequential v0.5.0 // indirect
 	github.com/moby/sys/signal v0.7.0 // indirect
@@ -152,6 +153,8 @@ require (
 
 require go.uber.org/goleak v1.1.12
 
+require github.com/fsnotify/fsevents v0.1.1
+
 replace (
 	// Override for e2e tests
 	github.com/cucumber/godog => github.com/laurazard/godog v0.0.0-20220922095256-4c4b17abdae7

go.sum

@@ -205,6 +205,8 @@ github.com/felixge/httpsnoop v1.0.2/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSw
 github.com/form3tech-oss/jwt-go v3.2.2+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
 github.com/form3tech-oss/jwt-go v3.2.3+incompatible/go.mod h1:pbq4aXjuKjdthFRnoDwaVPLA+WlJuPGy+QneDUgJi2k=
 github.com/frankban/quicktest v1.11.3/go.mod h1:wRf/ReqHper53s+kmmSZizM8NamnL3IM0I9ntUbOk+k=
+github.com/fsnotify/fsevents v0.1.1 h1:/125uxJvvoSDDBPen6yUZbil8J9ydKZnnl3TWWmvnkw=
+github.com/fsnotify/fsevents v0.1.1/go.mod h1:+d+hS27T6k5J8CRaPLKFgwKYcpS7GwW3Ule9+SC2ZRc=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
@@ -649,6 +651,8 @@ github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/theupdateframework/notary v0.7.0 h1:QyagRZ7wlSpjT5N2qQAh/pN+DVqgekv4DzbAiAiEL3c=
 github.com/theupdateframework/notary v0.7.0/go.mod h1:c9DRxcmhHmVLDay4/2fUYdISnHqbFDGRSlXPO0AhYWw=
+github.com/tilt-dev/fsnotify v1.4.8-0.20220602155310-fff9c274a375 h1:QB54BJwA6x8QU9nHY3xJSZR2kX9bgpZekRKGkLTmEXA=
+github.com/tilt-dev/fsnotify v1.4.8-0.20220602155310-fff9c274a375/go.mod h1:xRroudyp5iVtxKqZCrA6n2TLFRBf8bmnjr1UD4x+z7g=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tonistiigi/fsutil v0.0.0-20220930225714-4638ad635be5 h1:NJ1nZs4j4XcBJKIY5sAwTGp9w5b78Zxr3+r0zXRuKnA=
 github.com/tonistiigi/fsutil v0.0.0-20220930225714-4638ad635be5/go.mod h1:F83XRhNblQsKQH9hcKEE45GAOkL9590mtw9KsD0Q4fE=
@@ -904,6 +908,7 @@ golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20211025201205-69cdffdb9359/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211116061358-0a5406a5449c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220422013727-9388b58f7150/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

pkg/watch/dockerignore.go

@@ -0,0 +1,146 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/moby/buildkit/frontend/dockerfile/dockerignore"
+	"github.com/moby/patternmatcher"
+)
+
+type dockerPathMatcher struct {
+	repoRoot string
+	matcher  *patternmatcher.PatternMatcher
+}
+
+func (i dockerPathMatcher) Matches(f string) (bool, error) {
+	if !filepath.IsAbs(f) {
+		f = filepath.Join(i.repoRoot, f)
+	}
+	return i.matcher.MatchesOrParentMatches(f)
+}
+
+func (i dockerPathMatcher) MatchesEntireDir(f string) (bool, error) {
+	matches, err := i.Matches(f)
+	if !matches || err != nil {
+		return matches, err
+	}
+
+	// We match the dir, but we might exclude files underneath it.
+	if i.matcher.Exclusions() {
+		for _, pattern := range i.matcher.Patterns() {
+			if !pattern.Exclusion() {
+				continue
+			}
+			if IsChild(f, pattern.String()) {
+				// Found an exclusion match -- we don't match this whole dir
+				return false, nil
+			}
+		}
+		return true, nil
+	}
+	return true, nil
+}
+
+func NewDockerIgnoreTester(repoRoot string) (*dockerPathMatcher, error) {
+	absRoot, err := filepath.Abs(repoRoot)
+	if err != nil {
+		return nil, err
+	}
+
+	patterns, err := readDockerignorePatterns(absRoot)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewDockerPatternMatcher(absRoot, patterns)
+}
+
+// Make all the patterns use absolute paths.
+func absPatterns(absRoot string, patterns []string) []string {
+	absPatterns := make([]string, 0, len(patterns))
+	for _, p := range patterns {
+		// The pattern parsing here is loosely adapted from fileutils' NewPatternMatcher
+		p = strings.TrimSpace(p)
+		if p == "" {
+			continue
+		}
+		p = filepath.Clean(p)
+
+		pPath := p
+		isExclusion := false
+		if p[0] == '!' {
+			pPath = p[1:]
+			isExclusion = true
+		}
+
+		if !filepath.IsAbs(pPath) {
+			pPath = filepath.Join(absRoot, pPath)
+		}
+		absPattern := pPath
+		if isExclusion {
+			absPattern = fmt.Sprintf("!%s", pPath)
+		}
+		absPatterns = append(absPatterns, absPattern)
+	}
+	return absPatterns
+}
+
+func NewDockerPatternMatcher(repoRoot string, patterns []string) (*dockerPathMatcher, error) {
+	absRoot, err := filepath.Abs(repoRoot)
+	if err != nil {
+		return nil, err
+	}
+
+	pm, err := patternmatcher.New(absPatterns(absRoot, patterns))
+	if err != nil {
+		return nil, err
+	}
+
+	return &dockerPathMatcher{
+		repoRoot: absRoot,
+		matcher:  pm,
+	}, nil
+}
+
+func readDockerignorePatterns(repoRoot string) ([]string, error) {
+	var excludes []string
+
+	f, err := os.Open(filepath.Join(repoRoot, ".dockerignore"))
+	switch {
+	case os.IsNotExist(err):
+		return excludes, nil
+	case err != nil:
+		return nil, err
+	}
+	defer func() { _ = f.Close() }()
+
+	return dockerignore.ReadAll(f)
+}
+
+func DockerIgnoreTesterFromContents(repoRoot string, contents string) (*dockerPathMatcher, error) {
+	patterns, err := dockerignore.ReadAll(strings.NewReader(contents))
+	if err != nil {
+		return nil, err
+	}
+
+	return NewDockerPatternMatcher(repoRoot, patterns)
+}

pkg/watch/notify.go

@@ -1,3 +1,19 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import (
@@ -8,8 +24,6 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
-
-	"github.com/tilt-dev/tilt/pkg/logger"
 )
 
 var (
@@ -68,8 +82,8 @@ func (EmptyMatcher) MatchesEntireDir(f string) (bool, error) { return false, nil
 
 var _ PathMatcher = EmptyMatcher{}
 
-func NewWatcher(paths []string, ignore PathMatcher, l logger.Logger) (Notify, error) {
+func NewWatcher(paths []string, ignore PathMatcher) (Notify, error) {
-	return newWatcher(paths, ignore, l)
+	return newWatcher(paths, ignore)
 }
 
 const WindowsBufferSizeEnvVar = "TILT_WATCH_WINDOWS_BUFFER_SIZE"

pkg/watch/notify_test.go

@@ -1,3 +1,19 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import (
@@ -13,10 +29,6 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
-
-	"github.com/tilt-dev/tilt/internal/dockerignore"
-	"github.com/tilt-dev/tilt/internal/testutils/tempdir"
-	"github.com/tilt-dev/tilt/pkg/logger"
 )
 
 // Each implementation of the notify interface should have the same basic
@@ -24,15 +36,18 @@ import (
 
 func TestWindowsBufferSize(t *testing.T) {
 	orig := os.Getenv(WindowsBufferSizeEnvVar)
-	defer os.Setenv(WindowsBufferSizeEnvVar, orig)
+	defer os.Setenv(WindowsBufferSizeEnvVar, orig) //nolint:errcheck
 
-	os.Setenv(WindowsBufferSizeEnvVar, "")
+	err := os.Setenv(WindowsBufferSizeEnvVar, "")
+	assert.Nil(t, err)
 	assert.Equal(t, defaultBufferSize, DesiredWindowsBufferSize())
 
-	os.Setenv(WindowsBufferSizeEnvVar, "a")
+	err = os.Setenv(WindowsBufferSizeEnvVar, "a")
+	assert.Nil(t, err)
 	assert.Equal(t, defaultBufferSize, DesiredWindowsBufferSize())
 
-	os.Setenv(WindowsBufferSizeEnvVar, "10")
+	err = os.Setenv(WindowsBufferSizeEnvVar, "10")
+	assert.Nil(t, err)
 	assert.Equal(t, 10, DesiredWindowsBufferSize())
 }
 
@@ -71,7 +86,7 @@ func TestEventOrdering(t *testing.T) {
 	for i, dir := range dirs {
 		base := fmt.Sprintf("%d.txt", i)
 		p := filepath.Join(dir, base)
-		err := os.WriteFile(p, []byte(base), os.FileMode(0777))
+		err := os.WriteFile(p, []byte(base), os.FileMode(0o777))
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -174,7 +189,7 @@ func TestNewDirectoriesAreRecursivelyWatched(t *testing.T) {
 
 	// change something inside sub directory
 	changeFilePath := filepath.Join(subPath, "change")
-	file, err := os.OpenFile(changeFilePath, os.O_RDONLY|os.O_CREATE, 0666)
+	file, err := os.OpenFile(changeFilePath, os.O_RDONLY|os.O_CREATE, 0o666)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -236,7 +251,7 @@ func TestRemoveAndAddBack(t *testing.T) {
 	path := filepath.Join(f.paths[0], "change")
 
 	d1 := []byte("hello\ngo\n")
-	err := os.WriteFile(path, d1, 0644)
+	err := os.WriteFile(path, d1, 0o644)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -251,7 +266,7 @@ func TestRemoveAndAddBack(t *testing.T) {
 	f.assertEvents(path)
 	f.events = nil
 
-	err = os.WriteFile(path, d1, 0644)
+	err = os.WriteFile(path, d1, 0o644)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -272,7 +287,7 @@ func TestSingleFile(t *testing.T) {
 	f.fsync()
 
 	d2 := []byte("hello\nworld\n")
-	err := os.WriteFile(path, d2, 0644)
+	err := os.WriteFile(path, d2, 0o644)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -302,7 +317,7 @@ func TestWriteGoodLink(t *testing.T) {
 	f := newNotifyFixture(t)
 
 	goodFile := filepath.Join(f.paths[0], "goodFile")
-	err := os.WriteFile(goodFile, []byte("hello"), 0644)
+	err := os.WriteFile(goodFile, []byte("hello"), 0o644)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -387,7 +402,7 @@ func TestWatchNonexistentFileInNonexistentDirectoryCreatedSimultaneously(t *test
 	f := newNotifyFixture(t)
 
 	root := f.JoinPath("root")
-	err := os.Mkdir(root, 0777)
+	err := os.Mkdir(root, 0o777)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -404,7 +419,7 @@ func TestWatchNonexistentDirectory(t *testing.T) {
 	f := newNotifyFixture(t)
 
 	root := f.JoinPath("root")
-	err := os.Mkdir(root, 0777)
+	err := os.Mkdir(root, 0o777)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -415,12 +430,12 @@ func TestWatchNonexistentDirectory(t *testing.T) {
 	f.fsync()
 	f.events = nil
 
-	err = os.Mkdir(parent, 0777)
+	err = os.Mkdir(parent, 0o777)
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	// for directories that were the root of an Add, we don't report creation, cf. watcher_darwin.go
+	// for directories that were the root of an Add, we don't report creation, cf. watcher_fsevent.go
 	f.assertEvents()
 
 	f.events = nil
@@ -433,7 +448,7 @@ func TestWatchNonexistentFileInNonexistentDirectory(t *testing.T) {
 	f := newNotifyFixture(t)
 
 	root := f.JoinPath("root")
-	err := os.Mkdir(root, 0777)
+	err := os.Mkdir(root, 0o777)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -443,7 +458,7 @@ func TestWatchNonexistentFileInNonexistentDirectory(t *testing.T) {
 	f.watch(file)
 	f.assertEvents()
 
-	err = os.Mkdir(parent, 0777)
+	err = os.Mkdir(parent, 0o777)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -474,7 +489,7 @@ func TestWatchCountInnerFileWithIgnore(t *testing.T) {
 	f := newNotifyFixture(t)
 
 	root := f.paths[0]
-	ignore, _ := dockerignore.NewDockerPatternMatcher(root, []string{
+	ignore, _ := NewDockerPatternMatcher(root, []string{
 		"a",
 		"!a/b",
 	})
@@ -497,7 +512,7 @@ func TestIgnoreCreatedDir(t *testing.T) {
 	f := newNotifyFixture(t)
 
 	root := f.paths[0]
-	ignore, _ := dockerignore.NewDockerPatternMatcher(root, []string{"a/b"})
+	ignore, _ := NewDockerPatternMatcher(root, []string{"a/b"})
 	f.setIgnore(ignore)
 
 	a := f.JoinPath(root, "a")
@@ -517,7 +532,7 @@ func TestIgnoreCreatedDirWithExclusions(t *testing.T) {
 	f := newNotifyFixture(t)
 
 	root := f.paths[0]
-	ignore, _ := dockerignore.NewDockerPatternMatcher(root,
+	ignore, _ := NewDockerPatternMatcher(root,
 		[]string{
 			"a/b",
 			"c",
@@ -542,7 +557,7 @@ func TestIgnoreInitialDir(t *testing.T) {
 	f := newNotifyFixture(t)
 
 	root := f.TempDir("root")
-	ignore, _ := dockerignore.NewDockerPatternMatcher(root, []string{"a/b"})
+	ignore, _ := NewDockerPatternMatcher(root, []string{"a/b"})
 	f.setIgnore(ignore)
 
 	a := f.JoinPath(root, "a")
@@ -568,7 +583,7 @@ type notifyFixture struct {
 	ctx    context.Context
 	cancel func()
 	out    *bytes.Buffer
-	*tempdir.TempDirFixture
+	*TempDirFixture
 	notify Notify
 	ignore PathMatcher
 	paths  []string
@@ -581,7 +596,7 @@ func newNotifyFixture(t *testing.T) *notifyFixture {
 	nf := &notifyFixture{
 		ctx:            ctx,
 		cancel:         cancel,
-		TempDirFixture: tempdir.NewTempDirFixture(t),
+		TempDirFixture: NewTempDirFixture(t),
 		paths:          []string{},
 		ignore:         EmptyMatcher{},
 		out:            out,
@@ -609,7 +624,7 @@ func (f *notifyFixture) rebuildWatcher() {
 	}
 
 	// create a new watcher
-	notify, err := NewWatcher(f.paths, f.ignore, logger.NewTestLogger(f.out))
+	notify, err := NewWatcher(f.paths, f.ignore)
 	if err != nil {
 		f.T().Fatal(err)
 	}
@@ -674,7 +689,7 @@ func (f *notifyFixture) fsyncWithRetryCount(retryCount int) {
 	syncPathBase := fmt.Sprintf("sync-%d.txt", time.Now().UnixNano())
 	syncPath := filepath.Join(f.paths[0], syncPathBase)
 	anySyncPath := filepath.Join(f.paths[0], "sync-")
-	timeout := time.After(250 * time.Millisecond)
+	timeout := time.After(250 * time.Second)
 
 	f.WriteFile(syncPath, time.Now().String())
 

pkg/watch/paths.go

@@ -1,13 +1,28 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/pkg/errors"
-
-	"github.com/tilt-dev/tilt/internal/ospath"
 )
 
 func greatestExistingAncestor(path string) (string, error) {
@@ -37,13 +52,13 @@ func dedupePathsForRecursiveWatcher(paths []string) []string {
 		hasRemovals := false
 
 		for i, existing := range result {
-			if ospath.IsChild(existing, current) {
+			if IsChild(existing, current) {
 				// The path is already covered, so there's no need to include it
 				isCovered = true
 				break
 			}
 
-			if ospath.IsChild(current, existing) {
+			if IsChild(current, existing) {
 				// Mark the element empty fo removal.
 				result[i] = ""
 				hasRemovals = true
@@ -67,3 +82,58 @@ func dedupePathsForRecursiveWatcher(paths []string) []string {
 	}
 	return result
 }
+
+func IsChild(dir string, file string) bool {
+	if dir == "" {
+		return false
+	}
+
+	dir = filepath.Clean(dir)
+	current := filepath.Clean(file)
+	child := "."
+	for {
+		if strings.EqualFold(dir, current) {
+			// If the two paths are exactly equal, then they must be the same.
+			if dir == current {
+				return true
+			}
+
+			// If the two paths are equal under case-folding, but not exactly equal,
+			// then the only way to check if they're truly "equal" is to check
+			// to see if we're on a case-insensitive file system.
+			//
+			// This is a notoriously tricky problem. See how dep solves it here:
+			// https://github.com/golang/dep/blob/v0.5.4/internal/fs/fs.go#L33
+			//
+			// because you can mount case-sensitive filesystems onto case-insensitive
+			// file-systems, and vice versa :scream:
+			//
+			// We want to do as much of this check as possible with strings-only
+			// (to avoid a file system read and error handling), so we only
+			// do this check if we have no other choice.
+			dirInfo, err := os.Stat(dir)
+			if err != nil {
+				return false
+			}
+
+			currentInfo, err := os.Stat(current)
+			if err != nil {
+				return false
+			}
+
+			if !os.SameFile(dirInfo, currentInfo) {
+				return false
+			}
+			return true
+		}
+
+		if len(current) <= len(dir) || current == "." {
+			return false
+		}
+
+		cDir := filepath.Dir(current)
+		cBase := filepath.Base(current)
+		child = filepath.Join(cBase, child)
+		current = cDir
+	}
+}

pkg/watch/paths_test.go

@@ -1,3 +1,19 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import (
@@ -5,12 +21,10 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-
-	"github.com/tilt-dev/tilt/internal/testutils/tempdir"
 )
 
 func TestGreatestExistingAncestor(t *testing.T) {
-	f := tempdir.NewTempDirFixture(t)
+	f := NewTempDirFixture(t)
 
 	p, err := greatestExistingAncestor(f.Path())
 	assert.NoError(t, err)

pkg/watch/temp.go

@@ -1,3 +1,19 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import (
@@ -50,7 +66,7 @@ func (d *TempDir) NewDir(prefix string) (*TempDir, error) {
 
 func (d *TempDir) NewDeterministicDir(name string) (*TempDir, error) {
 	d2 := filepath.Join(d.dir, name)
-	err := os.Mkdir(d2, 0700)
+	err := os.Mkdir(d2, 0o700)
 	if os.IsExist(err) {
 		return nil, err
 	} else if err != nil {

pkg/watch/temp_dir_fixture.go

@@ -0,0 +1,199 @@
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
+
+import (
+	"os"
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+type TempDirFixture struct {
+	t      testing.TB
+	dir    *TempDir
+	oldDir string
+}
+
+// everything not listed in this character class will get replaced by _, so that it's a safe filename
+var sanitizeForFilenameRe = regexp.MustCompile("[^a-zA-Z0-9.]")
+
+func SanitizeFileName(name string) string {
+	return sanitizeForFilenameRe.ReplaceAllString(name, "_")
+}
+
+func NewTempDirFixture(t testing.TB) *TempDirFixture {
+	dir, err := NewDir(SanitizeFileName(t.Name()))
+	if err != nil {
+		t.Fatalf("Error making temp dir: %v", err)
+	}
+
+	ret := &TempDirFixture{
+		t:   t,
+		dir: dir,
+	}
+
+	t.Cleanup(ret.tearDown)
+
+	return ret
+}
+
+func (f *TempDirFixture) T() testing.TB {
+	return f.t
+}
+
+func (f *TempDirFixture) Path() string {
+	return f.dir.Path()
+}
+
+func (f *TempDirFixture) Chdir() {
+	cwd, err := os.Getwd()
+	if err != nil {
+		f.t.Fatal(err)
+	}
+
+	f.oldDir = cwd
+
+	err = os.Chdir(f.Path())
+	if err != nil {
+		f.t.Fatal(err)
+	}
+}
+
+func (f *TempDirFixture) JoinPath(path ...string) string {
+	p := []string{}
+	isAbs := len(path) > 0 && filepath.IsAbs(path[0])
+	if isAbs {
+		if !strings.HasPrefix(path[0], f.Path()) {
+			f.t.Fatalf("Path outside fixture tempdir are forbidden: %s", path[0])
+		}
+	} else {
+		p = append(p, f.Path())
+	}
+
+	p = append(p, path...)
+	return filepath.Join(p...)
+}
+
+func (f *TempDirFixture) JoinPaths(paths []string) []string {
+	joined := make([]string, len(paths))
+	for i, p := range paths {
+		joined[i] = f.JoinPath(p)
+	}
+	return joined
+}
+
+// Returns the full path to the file written.
+func (f *TempDirFixture) WriteFile(path string, contents string) string {
+	fullPath := f.JoinPath(path)
+	base := filepath.Dir(fullPath)
+	err := os.MkdirAll(base, os.FileMode(0o777))
+	if err != nil {
+		f.t.Fatal(err)
+	}
+	err = os.WriteFile(fullPath, []byte(contents), os.FileMode(0o777))
+	if err != nil {
+		f.t.Fatal(err)
+	}
+	return fullPath
+}
+
+// Returns the full path to the file written.
+func (f *TempDirFixture) CopyFile(originalPath, newPath string) {
+	contents, err := os.ReadFile(originalPath)
+	if err != nil {
+		f.t.Fatal(err)
+	}
+	f.WriteFile(newPath, string(contents))
+}
+
+// Read the file.
+func (f *TempDirFixture) ReadFile(path string) string {
+	fullPath := f.JoinPath(path)
+	contents, err := os.ReadFile(fullPath)
+	if err != nil {
+		f.t.Fatal(err)
+	}
+	return string(contents)
+}
+
+func (f *TempDirFixture) WriteSymlink(linkContents, destPath string) {
+	fullDestPath := f.JoinPath(destPath)
+	err := os.MkdirAll(filepath.Dir(fullDestPath), os.FileMode(0o777))
+	if err != nil {
+		f.t.Fatal(err)
+	}
+	err = os.Symlink(linkContents, fullDestPath)
+	if err != nil {
+		f.t.Fatal(err)
+	}
+}
+
+func (f *TempDirFixture) MkdirAll(path string) {
+	fullPath := f.JoinPath(path)
+	err := os.MkdirAll(fullPath, os.FileMode(0o777))
+	if err != nil {
+		f.t.Fatal(err)
+	}
+}
+
+func (f *TempDirFixture) TouchFiles(paths []string) {
+	for _, p := range paths {
+		f.WriteFile(p, "")
+	}
+}
+
+func (f *TempDirFixture) Rm(pathInRepo string) {
+	fullPath := f.JoinPath(pathInRepo)
+	err := os.RemoveAll(fullPath)
+	if err != nil {
+		f.t.Fatal(err)
+	}
+}
+
+func (f *TempDirFixture) NewFile(prefix string) (*os.File, error) {
+	return os.CreateTemp(f.dir.Path(), prefix)
+}
+
+func (f *TempDirFixture) TempDir(prefix string) string {
+	name, err := os.MkdirTemp(f.dir.Path(), prefix)
+	if err != nil {
+		f.t.Fatal(err)
+	}
+	return name
+}
+
+func (f *TempDirFixture) tearDown() {
+	if f.oldDir != "" {
+		err := os.Chdir(f.oldDir)
+		if err != nil {
+			f.t.Fatal(err)
+		}
+	}
+
+	err := f.dir.TearDown()
+	if err != nil && runtime.GOOS == "windows" &&
+		(strings.Contains(err.Error(), "The process cannot access the file") ||
+			strings.Contains(err.Error(), "Access is denied")) {
+		// NOTE(nick): I'm not convinced that this is a real problem.
+		// I think it might just be clean up of file notification I/O.
+	} else if err != nil {
+		f.t.Fatal(err)
+	}
+}

pkg/watch/watcher_fsevent.go

@@ -1,19 +1,36 @@
+//go:build darwin
+// +build darwin
+
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import (
 	"path/filepath"
 	"time"
 
+	"github.com/fsnotify/fsevents"
 	"github.com/pkg/errors"
-
+	"github.com/sirupsen/logrus"
-	"github.com/tilt-dev/tilt/pkg/logger"
-
-	"github.com/tilt-dev/fsevents"
 )
 
 // A file watcher optimized for Darwin.
-// Uses FSEvents to avoid the terrible perf characteristics of kqueue.
+// Uses FSEvents to avoid the terrible perf characteristics of kqueue. Requires CGO
-type darwinNotify struct {
+type fseventNotify struct {
 	stream *fsevents.EventStream
 	events chan FileEvent
 	errors chan error
@@ -21,11 +38,10 @@ type darwinNotify struct {
 
 	pathsWereWatching map[string]interface{}
 	ignore            PathMatcher
-	logger            logger.Logger
 	sawAnyHistoryDone bool
 }
 
-func (d *darwinNotify) loop() {
+func (d *fseventNotify) loop() {
 	for {
 		select {
 		case <-d.stop:
@@ -58,7 +74,7 @@ func (d *darwinNotify) loop() {
 
 				ignore, err := d.ignore.Matches(e.Path)
 				if err != nil {
-					d.logger.Infof("Error matching path %q: %v", e.Path, err)
+					logrus.Infof("Error matching path %q: %v", e.Path, err)
 				} else if ignore {
 					continue
 				}
@@ -70,7 +86,7 @@ func (d *darwinNotify) loop() {
 }
 
 // Add a path to be watched. Should only be called during initialization.
-func (d *darwinNotify) initAdd(name string) {
+func (d *fseventNotify) initAdd(name string) {
 	d.stream.Paths = append(d.stream.Paths, name)
 
 	if d.pathsWereWatching == nil {
@@ -79,7 +95,7 @@ func (d *darwinNotify) initAdd(name string) {
 	d.pathsWereWatching[name] = struct{}{}
 }
 
-func (d *darwinNotify) Start() error {
+func (d *fseventNotify) Start() error {
 	if len(d.stream.Paths) == 0 {
 		return nil
 	}
@@ -93,7 +109,7 @@ func (d *darwinNotify) Start() error {
 	return nil
 }
 
-func (d *darwinNotify) Close() error {
+func (d *fseventNotify) Close() error {
 	numberOfWatches.Add(int64(-len(d.stream.Paths)))
 
 	d.stream.Stop()
@@ -103,18 +119,17 @@ func (d *darwinNotify) Close() error {
 	return nil
 }
 
-func (d *darwinNotify) Events() chan FileEvent {
+func (d *fseventNotify) Events() chan FileEvent {
 	return d.events
 }
 
-func (d *darwinNotify) Errors() chan error {
+func (d *fseventNotify) Errors() chan error {
 	return d.errors
 }
 
-func newWatcher(paths []string, ignore PathMatcher, l logger.Logger) (*darwinNotify, error) {
+func newFSEventWatcher(paths []string, ignore PathMatcher) (*fseventNotify, error) {
-	dw := &darwinNotify{
+	dw := &fseventNotify{
 		ignore: ignore,
-		logger: l,
 		stream: &fsevents.EventStream{
 			Latency: 1 * time.Millisecond,
 			Flags:   fsevents.FileEvents,
@@ -139,4 +154,4 @@ func newWatcher(paths []string, ignore PathMatcher, l logger.Logger) (*darwinNot
 	return dw, nil
 }
 
-var _ Notify = &darwinNotify{}
+var _ Notify = &fseventNotify{}

pkg/watch/watcher_naive.go

@@ -1,5 +1,18 @@
-//go:build !darwin
+/*
-// +build !darwin
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
@@ -12,10 +25,9 @@ import (
 	"strings"
 
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 
 	"github.com/tilt-dev/fsnotify"
-	"github.com/tilt-dev/tilt/internal/ospath"
-	"github.com/tilt-dev/tilt/pkg/logger"
 )
 
 // A naive file watcher that uses the plain fsnotify API.
@@ -33,7 +45,6 @@ type naiveNotify struct {
 	notifyList map[string]bool
 
 	ignore PathMatcher
-	log    logger.Logger
 
 	isWatcherRecursive bool
 	watcher            *fsnotify.Watcher
@@ -71,7 +82,9 @@ func (d *naiveNotify) Start() error {
 		// we should have caught that above, let's just skip it.
 		if os.IsNotExist(err) {
 			continue
-		} else if fi.IsDir() {
+		}
+
+		if fi.IsDir() {
 			err = d.watchRecursively(name)
 			if err != nil {
 				return errors.Wrapf(err, "notify.Add(%q)", name)
@@ -141,7 +154,7 @@ func (d *naiveNotify) Errors() chan error {
 	return d.errors
 }
 
-func (d *naiveNotify) loop() {
+func (d *naiveNotify) loop() { //nolint:gocyclo
 	defer close(d.wrappedEvents)
 	for e := range d.events {
 		// The Windows fsnotify event stream sometimes gets events with empty names
@@ -202,13 +215,13 @@ func (d *naiveNotify) loop() {
 			if shouldWatch {
 				err := d.add(path)
 				if err != nil && !os.IsNotExist(err) {
-					d.log.Infof("Error watching path %s: %s", e.Name, err)
+					logrus.Infof("Error watching path %s: %s", e.Name, err)
 				}
 			}
 			return nil
 		})
 		if err != nil && !os.IsNotExist(err) {
-			d.log.Infof("Error walking directory %s: %s", e.Name, err)
+			logrus.Infof("Error walking directory %s: %s", e.Name, err)
 		}
 	}
 }
@@ -216,7 +229,7 @@ func (d *naiveNotify) loop() {
 func (d *naiveNotify) shouldNotify(path string) bool {
 	ignore, err := d.ignore.Matches(path)
 	if err != nil {
-		d.log.Infof("Error matching path %q: %v", path, err)
+		logrus.Infof("Error matching path %q: %v", path, err)
 	} else if ignore {
 		return false
 	}
@@ -225,14 +238,11 @@ func (d *naiveNotify) shouldNotify(path string) bool {
 		// We generally don't care when directories change at the root of an ADD
 		stat, err := os.Lstat(path)
 		isDir := err == nil && stat.IsDir()
-		if isDir {
+		return !isDir
-			return false
-		}
-		return true
 	}
 
 	for root := range d.notifyList {
-		if ospath.IsChild(root, path) {
+		if IsChild(root, path) {
 			return true
 		}
 	}
@@ -267,7 +277,7 @@ func (d *naiveNotify) shouldSkipDir(path string) (bool, error) {
 	// - A parent of a directory that's in our notify list
 	//   (i.e., to cover the "path doesn't exist" case).
 	for root := range d.notifyList {
-		if ospath.IsChild(root, path) || ospath.IsChild(path, root) {
+		if IsChild(root, path) || IsChild(path, root) {
 			return false, nil
 		}
 	}
@@ -284,7 +294,7 @@ func (d *naiveNotify) add(path string) error {
 	return nil
 }
 
-func newWatcher(paths []string, ignore PathMatcher, l logger.Logger) (*naiveNotify, error) {
+func newWatcher(paths []string, ignore PathMatcher) (*naiveNotify, error) {
 	if ignore == nil {
 		return nil, fmt.Errorf("newWatcher: ignore is nil")
 	}
@@ -319,7 +329,6 @@ func newWatcher(paths []string, ignore PathMatcher, l logger.Logger) (*naiveNoti
 	wmw := &naiveNotify{
 		notifyList:         notifyList,
 		ignore:             ignore,
-		log:                l,
 		watcher:            fsw,
 		events:             fsw.Events,
 		wrappedEvents:      wrappedEvents,

pkg/watch/watcher_naive_test.go

@@ -1,5 +1,18 @@
-//go:build !darwin
+/*
-// +build !darwin
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
@@ -39,7 +52,7 @@ func TestDontWatchEachFile(t *testing.T) {
 	f.WriteFile(f.JoinPath(watched, "initial.txt"), "initial data")
 
 	initialDir := f.JoinPath(watched, "initial_dir")
-	if err := os.Mkdir(initialDir, 0777); err != nil {
+	if err := os.Mkdir(initialDir, 0o777); err != nil {
 		t.Fatal(err)
 	}
 
@@ -56,13 +69,13 @@ func TestDontWatchEachFile(t *testing.T) {
 
 	// inplace
 	inplace := f.JoinPath(watched, "inplace")
-	if err := os.Mkdir(inplace, 0777); err != nil {
+	if err := os.Mkdir(inplace, 0o777); err != nil {
 		t.Fatal(err)
 	}
 	f.WriteFile(f.JoinPath(inplace, "inplace.txt"), "inplace data")
 
 	inplaceDir := f.JoinPath(inplace, "inplace_dir")
-	if err := os.Mkdir(inplaceDir, 0777); err != nil {
+	if err := os.Mkdir(inplaceDir, 0o777); err != nil {
 		t.Fatal(err)
 	}
 
@@ -81,7 +94,7 @@ func TestDontWatchEachFile(t *testing.T) {
 	f.WriteFile(f.JoinPath(staged, "staged.txt"), "staged data")
 
 	stagedDir := f.JoinPath(staged, "staged_dir")
-	if err := os.Mkdir(stagedDir, 0777); err != nil {
+	if err := os.Mkdir(stagedDir, 0o777); err != nil {
 		t.Fatal(err)
 	}
 
@@ -109,10 +122,10 @@ func TestDontWatchEachFile(t *testing.T) {
 func inotifyNodes() (int, error) {
 	pid := os.Getpid()
 
-	output, err := exec.Command("bash", "-c", fmt.Sprintf(
+	output, err := exec.Command("/bin/sh", "-c", fmt.Sprintf(
 		"find /proc/%d/fd -lname anon_inode:inotify -printf '%%hinfo/%%f\n' | xargs cat | grep -c '^inotify'", pid)).Output()
 	if err != nil {
-		return 0, fmt.Errorf("error running command to determine number of watched files: %v", err)
+		return 0, fmt.Errorf("error running command to determine number of watched files: %v\n %s", err, output)
 	}
 
 	n, err := strconv.Atoi(strings.TrimSpace(string(output)))

pkg/watch/watcher_nonwin.go

@@ -1,6 +1,22 @@
 //go:build !windows
 // +build !windows
 
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import "github.com/tilt-dev/fsnotify"

pkg/watch/watcher_windows.go

@@ -1,6 +1,22 @@
 //go:build windows
 // +build windows
 
+/*
+   Copyright 2020 Docker Compose CLI authors
+
+   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 watch
 
 import (