Use local completion files and directories according to typed command

command.go

@@ -17,11 +17,11 @@ func (c *Command) options(args []string) (options []Option, only bool) {
 
 	// remove the first argument, which is the command name
 	args = args[1:]
-
+	last := last(args)
 	// if prev has something that needs to follow it,
 	// it is the most relevant completion
-	if predicate, ok := c.Flags[last(args)]; ok && predicate != nil {
+	if predicate, ok := c.Flags[last]; ok && predicate != nil {
-		return predicate.predict(), true
+		return predicate.predict(last), true
 	}
 
 	sub, options, only := c.searchSub(args)
@@ -41,7 +41,7 @@ func (c *Command) options(args []string) (options []Option, only bool) {
 	}
 
 	// add additional expected argument of the command
-	options = append(options, c.Args.predict()...)
+	options = append(options, c.Args.predict(last)...)
 
 	return
 }

gocomplete/complete.go

@@ -8,7 +8,7 @@ var (
 	predictEllipsis = complete.PredictSet("./...")
 
 	goFilesOrPackages = complete.PredictFiles("**.go").
-				Or(complete.PredictDirs("./")).
+				Or(complete.PredictDirs).
 				Or(predictEllipsis)
 )
 
@@ -34,7 +34,7 @@ func main() {
 			"-installsuffix": complete.PredictAnything,
 			"-ldflags":       complete.PredictAnything,
 			"-linkshared":    complete.PredictNothing,
-			"-pkgdir":        complete.PredictDirs("./"),
+			"-pkgdir":        complete.PredictDirs,
 			"-tags":          complete.PredictAnything,
 			"-toolexec":      complete.PredictAnything,
 		},
@@ -45,7 +45,7 @@ func main() {
 		Flags: complete.Flags{
 			"-exec": complete.PredictAnything,
 		},
-		Args: complete.PredictFiles("**.go"),
+		Args: complete.PredictFiles("*.go"),
 	}
 
 	test := complete.Command{
@@ -59,23 +59,23 @@ func main() {
 			"-count":     complete.PredictAnything,
 			"-cover":     complete.PredictNothing,
 			"-covermode": complete.PredictSet("set", "count", "atomic"),
-			"-coverpkg":  complete.PredictDirs("./"),
+			"-coverpkg":  complete.PredictDirs,
 			"-cpu":       complete.PredictAnything,
 			"-run":       predictTest("test"),
 			"-short":     complete.PredictNothing,
 			"-timeout":   complete.PredictAnything,
 
 			"-benchmem":             complete.PredictNothing,
-			"-blockprofile":         complete.PredictFiles("**.out"),
+			"-blockprofile":         complete.PredictFiles("*.out"),
 			"-blockprofilerate":     complete.PredictAnything,
-			"-coverprofile":         complete.PredictFiles("**.out"),
+			"-coverprofile":         complete.PredictFiles("*.out"),
-			"-cpuprofile":           complete.PredictFiles("**.out"),
+			"-cpuprofile":           complete.PredictFiles("*.out"),
-			"-memprofile":           complete.PredictFiles("**.out"),
+			"-memprofile":           complete.PredictFiles("*.out"),
 			"-memprofilerate":       complete.PredictAnything,
-			"-mutexprofile":         complete.PredictFiles("**.out"),
+			"-mutexprofile":         complete.PredictFiles("*.out"),
 			"-mutexprofilefraction": complete.PredictAnything,
-			"-outputdir":            complete.PredictDirs("./"),
+			"-outputdir":            complete.PredictDirs,
-			"-trace":                complete.PredictFiles("**.out"),
+			"-trace":                complete.PredictFiles("*.out"),
 		},
 		Args: goFilesOrPackages,
 	}
@@ -115,7 +115,7 @@ func main() {
 			"-n": complete.PredictNothing,
 			"-x": complete.PredictNothing,
 		},
-		Args: complete.PredictDirs("./"),
+		Args: complete.PredictDirs,
 	}
 
 	list := complete.Command{
@@ -124,7 +124,7 @@ func main() {
 			"-f":    complete.PredictAnything,
 			"-json": complete.PredictNothing,
 		},
-		Args: complete.PredictDirs("./"),
+		Args: complete.PredictDirs,
 	}
 
 	tool := complete.Command{
@@ -141,7 +141,7 @@ func main() {
 			"-n": complete.PredictNothing,
 			"-x": complete.PredictNothing,
 		},
-		Args: complete.PredictDirs("./"),
+		Args: complete.PredictDirs,
 	}
 
 	env := complete.Command{
@@ -152,7 +152,7 @@ func main() {
 	version := complete.Command{}
 
 	fix := complete.Command{
-		Args: complete.PredictDirs("./"),
+		Args: complete.PredictDirs,
 	}
 
 	// commands that also accepts the build flags

gocomplete/tests.go

@@ -13,7 +13,7 @@ import (
 
 func predictTest(testType string) *complete.Predicate {
 	return &complete.Predicate{
-		Predictor: func() []complete.Option {
+		Predictor: func(last string) []complete.Option {
 			tests := testNames(testType)
 			options := make([]complete.Option, len(tests))
 			for i := range tests {

predicate.go

@@ -9,7 +9,7 @@ import (
 type Predicate struct {
 	// Predictor is function that returns list of arguments that can
 	// come after the flag/command
-	Predictor func() []Option
+	Predictor func(last string) []Option
 }
 
 // Or unions two predicate struct, so that the result predicate
@@ -19,25 +19,26 @@ func (p *Predicate) Or(other *Predicate) *Predicate {
 		return nil
 	}
 	return &Predicate{
-		Predictor: func() []Option { return append(p.predict(), other.predict()...) },
+		Predictor: func(last string) []Option { return append(p.predict(last), other.predict(last)...) },
 	}
 }
 
-func (p *Predicate) predict() []Option {
+func (p *Predicate) predict(last string) []Option {
 	if p == nil || p.Predictor == nil {
 		return nil
 	}
-	return p.Predictor()
+	return p.Predictor(last)
 }
 
 var (
 	PredictNothing  *Predicate = nil
 	PredictAnything            = &Predicate{}
+	PredictDirs                = &Predicate{Predictor: dirs}
 )
 
 func PredictSet(options ...string) *Predicate {
 	return &Predicate{
-		Predictor: func() []Option {
+		Predictor: func(last string) []Option {
 			ret := make([]Option, len(options))
 			for i := range options {
 				ret[i] = Arg(options[i])
@@ -51,12 +52,12 @@ func PredictFiles(pattern string) *Predicate {
 	return &Predicate{Predictor: glob(pattern)}
 }
 
-func PredictDirs(path string) *Predicate {
+func dirs(last string) (options []Option) {
-	return &Predicate{Predictor: dirs(path)}
+	dir := dirFromLast(last)
+	return dirsAt(dir)
 }
 
-func dirs(path string) func() []Option {
+func dirsAt(path string) []Option {
-	return func() (options []Option) {
 	dirs := []string{}
 	filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
 		if info.IsDir() {
@@ -68,12 +69,12 @@ func dirs(path string) func() []Option {
 		filesToRel(dirs)
 	}
 	return filesToOptions(dirs)
-	}
 }
 
-func glob(pattern string) func() []Option {
+func glob(pattern string) func(last string) []Option {
-	return func() []Option {
+	return func(last string) []Option {
-		files, err := filepath.Glob(pattern)
+		dir := dirFromLast(last)
+		files, err := filepath.Glob(filepath.Join(dir, pattern))
 		if err != nil {
 			Log("failed glob operation with pattern '%s': %s", pattern, err)
 		}
@@ -83,6 +84,7 @@ func glob(pattern string) func() []Option {
 		return filesToOptions(files)
 	}
 }
+
 func filesToRel(files []string) {
 	wd, err := os.Getwd()
 	if err != nil {
@@ -97,6 +99,9 @@ func filesToRel(files []string) {
 		if err != nil {
 			continue
 		}
+		if rel == "." {
+			rel = ""
+		}
 		files[i] = "./" + rel
 	}
 	return
@@ -109,3 +114,15 @@ func filesToOptions(files []string) []Option {
 	}
 	return options
 }
+
+// dirFromLast gives the directory of the current written
+// last argument if it represents a file name being written.
+// in case that it is not, we fall back to the current directory.
+func dirFromLast(last string) string {
+	dir := filepath.Dir(last)
+	_, err := os.Stat(dir)
+	if err != nil {
+		return "./"
+	}
+	return dir
+}

run_test.go

@@ -12,6 +12,10 @@ func TestCompleter_Complete(t *testing.T) {
 	if testing.Verbose() {
 		os.Setenv(envDebug, "1")
 	}
+	err := os.Chdir("./tests")
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	c := Command{
 		Sub: map[string]Command{
@@ -26,13 +30,13 @@ func TestCompleter_Complete(t *testing.T) {
 					"-flag2": PredictNothing,
 					"-flag3": PredictSet("opt1", "opt2", "opt12"),
 				},
-				Args: PredictDirs("./tests/").Or(PredictFiles("./tests/*.md")),
+				Args: PredictDirs.Or(PredictFiles("*.md")),
 			},
 		},
 		Flags: map[string]*Predicate{
 			"-h":       PredictNothing,
 			"-global1": PredictAnything,
-			"-o":       PredictFiles("./tests/*.txt"),
+			"-o":       PredictFiles("*.txt"),
 		},
 	}
 
@@ -44,7 +48,7 @@ func TestCompleter_Complete(t *testing.T) {
 		allGlobals = append(allGlobals, flag)
 	}
 
-	testTXTFiles := []string{"./tests/a.txt", "./tests/b.txt", "./tests/c.txt"}
+	testTXTFiles := []string{"./a.txt", "./b.txt", "./c.txt"}
 
 	tests := []struct {
 		args string
@@ -84,19 +88,19 @@ func TestCompleter_Complete(t *testing.T) {
 		},
 		{
 			args: "sub2 ",
-			want: []string{"./tests", "-flag2", "-flag3", "-h", "-global1", "-o"},
+			want: []string{"./", "./dir", "./readme.md", "-flag2", "-flag3", "-h", "-global1", "-o"},
 		},
 		{
-			args: "sub2 tests",
+			args: "sub2 ./",
-			want: []string{"./tests", "./tests/readme.md", "./tests/dir"},
+			want: []string{"./", "./readme.md", "./dir"},
 		},
 		{
-			args: "sub2 tests/re",
+			args: "sub2 re",
-			want: []string{"./tests/readme.md"},
+			want: []string{"./readme.md"},
 		},
 		{
 			args: "sub2 -flag2 ",
-			want: []string{"./tests", "-flag2", "-flag3", "-h", "-global1", "-o"},
+			want: []string{"./", "./dir", "./readme.md", "-flag2", "-flag3", "-h", "-global1", "-o"},
 		},
 		{
 			args: "sub1 -fl",
@@ -132,30 +136,30 @@ func TestCompleter_Complete(t *testing.T) {
 		},
 		{
 			args: "-o ",
-			want: []string{},
-		},
-		{
-			args: "-o ./tes",
-			want: []string{},
-		},
-		{
-			args: "-o tests/",
 			want: testTXTFiles,
 		},
 		{
-			args: "-o tests",
+			args: "-o ./no-su",
+			want: []string{},
+		},
+		{
+			args: "-o ./",
 			want: testTXTFiles,
 		},
 		{
-			args: "-o ./compl",
+			args: "-o ",
+			want: testTXTFiles,
+		},
+		{
+			args: "-o ./read",
 			want: []string{},
 		},
 		{
-			args: "-o ./complete.go",
+			args: "-o ./readme.md",
 			want: []string{},
 		},
 		{
-			args: "-o ./complete.go ",
+			args: "-o ./readme.md ",
 			want: allGlobals,
 		},
 		{