Improve files and directories completion

command.go

@@ -33,11 +33,13 @@ func (c *Command) options(args []string) (options []match.Matcher, only bool) {
 
 	// remove the first argument, which is the command name
 	args = args[1:]
-	last := last(args)
+	wordCurrent := last(args)
-	// if prev has something that needs to follow it,
+	wordCompleted := last(removeLast(args))
+	// if wordCompleted has something that needs to follow it,
 	// it is the most relevant completion
-	if predicate, ok := c.Flags[last]; ok && predicate != nil {
+	if predicate, ok := c.Flags[wordCompleted]; ok && predicate != nil {
-		return predicate.predict(last), true
+		Log("Predicting according to flag %s", wordCurrent)
+		return predicate.predict(wordCurrent), true
 	}
 
 	sub, options, only := c.searchSub(args)
@@ -57,7 +59,7 @@ func (c *Command) options(args []string) (options []match.Matcher, only bool) {
 	}
 
 	// add additional expected argument of the command
-	options = append(options, c.Args.predict(last)...)
+	options = append(options, c.Args.predict(wordCurrent)...)
 
 	return
 }
@@ -65,7 +67,12 @@ func (c *Command) options(args []string) (options []match.Matcher, only bool) {
 // searchSub searches recursively within sub commands if the sub command appear
 // in the on of the arguments.
 func (c *Command) searchSub(args []string) (sub string, all []match.Matcher, only bool) {
-	for i, arg := range args {
+
+	// search for sub command in all arguments except the last one
+	// because that one might not be completed yet
+	searchArgs := removeLast(args)
+
+	for i, arg := range searchArgs {
 		if cmd, ok := c.Sub[arg]; ok {
 			sub = arg
 			all, only = cmd.options(args[i:])
@@ -83,3 +90,10 @@ func (c *Command) subCommands() []match.Matcher {
 	}
 	return subs
 }
+
+func removeLast(a []string) []string {
+	if len(a) > 0 {
+		return a[:len(a)-1]
+	}
+	return a
+}

complete.go

@@ -59,11 +59,12 @@ func (c *Complete) Run() bool {
 // complete get a command an command line arguments and returns
 // matching completion options
 func complete(c Command, args []string) (matching []string) {
-	options, _ := c.options(args[:len(args)-1])
+	options, _ := c.options(args)
 
 	// choose only matching options
 	l := last(args)
 	for _, option := range options {
+		Log("option %T, %s -> %t", option, option, option.Match(l))
 		if option.Match(l) {
 			matching = append(matching, option.String())
 		}
@@ -87,6 +88,7 @@ func last(args []string) (last string) {
 }
 
 func output(options []string) {
+	Log("")
 	// stdout of program defines the complete options
 	for _, option := range options {
 		fmt.Println(option)

complete_test.go

@@ -23,7 +23,7 @@ func TestCompleter_Complete(t *testing.T) {
 					"-flag2": PredictNothing,
 					"-flag3": PredictSet("opt1", "opt2", "opt12"),
 				},
-				Args: Predicate(PredictDirs).Or(PredictFiles("*.md")),
+				Args: Predicate(PredictDirs("*")).Or(PredictFiles("*.md")),
 			},
 		},
 		Flags: map[string]Predicate{
@@ -41,7 +41,7 @@ func TestCompleter_Complete(t *testing.T) {
 		allGlobals = append(allGlobals, flag)
 	}
 
-	testTXTFiles := []string{"./a.txt", "./b.txt", "./c.txt"}
+	testTXTFiles := []string{"./a.txt", "./b.txt", "./c.txt", "./.dot.txt"}
 
 	tests := []struct {
 		args string
@@ -81,11 +81,11 @@ func TestCompleter_Complete(t *testing.T) {
 		},
 		{
 			args: "sub2 ",
-			want: []string{"./", "./dir", "./readme.md", "-flag2", "-flag3", "-h", "-global1", "-o"},
+			want: []string{"./", "./dir/", "./readme.md", "-flag2", "-flag3", "-h", "-global1", "-o"},
 		},
 		{
 			args: "sub2 ./",
-			want: []string{"./", "./readme.md", "./dir"},
+			want: []string{"./", "./readme.md", "./dir/"},
 		},
 		{
 			args: "sub2 re",
@@ -93,7 +93,7 @@ func TestCompleter_Complete(t *testing.T) {
 		},
 		{
 			args: "sub2 -flag2 ",
-			want: []string{"./", "./dir", "./readme.md", "-flag2", "-flag3", "-h", "-global1", "-o"},
+			want: []string{"./", "./dir/", "./readme.md", "-flag2", "-flag3", "-h", "-global1", "-o"},
 		},
 		{
 			args: "sub1 -fl",

gocomplete/complete.go

@@ -7,7 +7,7 @@ var (
 	predictEllipsis = complete.PredictSet("./...")
 
 	goFilesOrPackages = complete.PredictFiles("*.go").
-				Or(complete.PredictDirs).
+				Or(complete.PredictDirs("*")).
 				Or(predictEllipsis)
 )
 
@@ -33,7 +33,7 @@ func main() {
 			"-installsuffix": complete.PredictAnything,
 			"-ldflags":       complete.PredictAnything,
 			"-linkshared":    complete.PredictNothing,
-			"-pkgdir":        complete.PredictDirs,
+			"-pkgdir":        complete.PredictDirs("*"),
 			"-tags":          complete.PredictAnything,
 			"-toolexec":      complete.PredictAnything,
 		},
@@ -58,7 +58,7 @@ 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", "Example"),
 			"-short":     complete.PredictNothing,
@@ -73,7 +73,7 @@ func main() {
 			"-memprofilerate":       complete.PredictAnything,
 			"-mutexprofile":         complete.PredictFiles("*.out"),
 			"-mutexprofilefraction": complete.PredictAnything,
-			"-outputdir":            complete.PredictDirs,
+			"-outputdir":            complete.PredictDirs("*"),
 			"-trace":                complete.PredictFiles("*.out"),
 		},
 		Args: goFilesOrPackages,
@@ -114,7 +114,7 @@ func main() {
 			"-n": complete.PredictNothing,
 			"-x": complete.PredictNothing,
 		},
-		Args: complete.PredictDirs,
+		Args: complete.PredictDirs("*"),
 	}
 
 	list := complete.Command{
@@ -123,7 +123,7 @@ func main() {
 			"-f":    complete.PredictAnything,
 			"-json": complete.PredictNothing,
 		},
-		Args: complete.PredictDirs,
+		Args: complete.PredictDirs("*"),
 	}
 
 	tool := complete.Command{
@@ -140,7 +140,7 @@ func main() {
 			"-n": complete.PredictNothing,
 			"-x": complete.PredictNothing,
 		},
-		Args: complete.PredictDirs,
+		Args: complete.PredictDirs("*"),
 	}
 
 	env := complete.Command{
@@ -151,7 +151,7 @@ func main() {
 	version := complete.Command{}
 
 	fix := complete.Command{
-		Args: complete.PredictDirs,
+		Args: complete.PredictDirs("*"),
 	}
 
 	// commands that also accepts the build flags

match/file.go

@@ -1,7 +1,6 @@
 package match
 
 import (
-	"path/filepath"
 	"strings"
 )
 
@@ -15,16 +14,13 @@ func (a File) String() string {
 
 // Match returns true if prefix's abs path prefixes a's abs path
 func (a File) Match(prefix string) bool {
-	full, err := filepath.Abs(string(a))
+
-	if err != nil {
+	// special case for current directory completion
-		return false
+	if a == "./" && (prefix == "." || prefix == "") {
-	}
+		return true
-	prefixFull, err := filepath.Abs(prefix)
-	if err != nil {
-		return false
 	}
 
-	// if the file has the prefix as prefix,
+	cmp := strings.TrimPrefix(string(a), "./")
-	// but we don't want to show too many files, so, if it is in a deeper directory - omit it.
+	prefix = strings.TrimPrefix(prefix, "./")
-	return strings.HasPrefix(full, prefixFull) && (full == prefixFull || !strings.Contains(full[len(prefixFull)+1:], "/"))
+	return strings.HasPrefix(cmp, prefix)
 }

match/match_test.go

@@ -45,6 +45,7 @@ func TestMatch(t *testing.T) {
 				{prefix: "", want: true},
 				{prefix: "f", want: true},
 				{prefix: "./f", want: true},
+				{prefix: "./.", want: false},
 				{prefix: "file.", want: true},
 				{prefix: "./file.", want: true},
 				{prefix: "file.txt", want: true},
@@ -54,6 +55,7 @@ func TestMatch(t *testing.T) {
 				{prefix: "/file.txt", want: false},
 				{prefix: "/fil", want: false},
 				{prefix: "/file.txt2", want: false},
+				{prefix: "/.", want: false},
 			},
 		},
 		{
@@ -62,6 +64,7 @@ func TestMatch(t *testing.T) {
 				{prefix: "", want: true},
 				{prefix: "f", want: true},
 				{prefix: "./f", want: true},
+				{prefix: "./.", want: false},
 				{prefix: "file.", want: true},
 				{prefix: "./file.", want: true},
 				{prefix: "file.txt", want: true},
@@ -71,14 +74,16 @@ func TestMatch(t *testing.T) {
 				{prefix: "/file.txt", want: false},
 				{prefix: "/fil", want: false},
 				{prefix: "/file.txt2", want: false},
+				{prefix: "/.", want: false},
 			},
 		},
 		{
 			m: File("/file.txt"),
 			tests: []matcherTest{
-				{prefix: "", want: false},
+				{prefix: "", want: true},
 				{prefix: "f", want: false},
 				{prefix: "./f", want: false},
+				{prefix: "./.", want: false},
 				{prefix: "file.", want: false},
 				{prefix: "./file.", want: false},
 				{prefix: "file.txt", want: false},
@@ -88,13 +93,23 @@ func TestMatch(t *testing.T) {
 				{prefix: "/file.txt", want: true},
 				{prefix: "/fil", want: true},
 				{prefix: "/file.txt2", want: false},
+				{prefix: "/.", want: false},
+			},
+		},
+		{
+			m: File("./"),
+			tests: []matcherTest{
+				{prefix: "", want: true},
+				{prefix: ".", want: true},
+				{prefix: "./", want: true},
+				{prefix: "./.", want: false},
 			},
 		},
 	}
 
 	for _, tt := range tests {
 		for _, ttt := range tt.tests {
-			name := "matcher:" + tt.m.String() + "/prefix:" + ttt.prefix
+			name := "matcher='" + tt.m.String() + "'&prefix='" + ttt.prefix + "'"
 			t.Run(name, func(t *testing.T) {
 				got := tt.m.Match(ttt.prefix)
 				if got != ttt.want {

predicate.go

@@ -3,7 +3,6 @@ package complete
 import (
 	"os"
 	"path/filepath"
-	"strings"
 
 	"github.com/posener/complete/match"
 )
@@ -53,23 +52,8 @@ func PredictSet(options ...string) Predicate {
 // PredictDirs will search for directories in the given started to be typed
 // path, if no path was started to be typed, it will complete to directories
 // in the current working directory.
-func PredictDirs(last string) (options []match.Matcher) {
+func PredictDirs(pattern string) Predicate {
-	path := dirFromLast(last)
+	return files(pattern, true, false)
-	dirs := []string{}
-	filepath.Walk(path, func(path string, info os.FileInfo, err error) error {
-		if err != nil {
-			return nil
-		}
-		if info.IsDir() {
-			dirs = append(dirs, path)
-		}
-		return nil
-	})
-	// if given path is not absolute, return relative paths
-	if !filepath.IsAbs(path) {
-		filesToRel(dirs)
-	}
-	return filesToMatchers(dirs)
 }
 
 // PredictFiles will search for files matching the given pattern in the started to
@@ -77,12 +61,26 @@ func PredictDirs(last string) (options []match.Matcher) {
 // match the pattern in the current working directory.
 // To match any file, use "*" as pattern. To match go files use "*.go", and so on.
 func PredictFiles(pattern string) Predicate {
+	return files(pattern, false, true)
+}
+
+// PredictFilesOrDirs predict any file or directory that matches the pattern
+func PredictFilesOrDirs(pattern string) Predicate {
+	return files(pattern, true, true)
+}
+
+func files(pattern string, allowDirs, allowFiles bool) Predicate {
 	return func(last string) []match.Matcher {
 		dir := dirFromLast(last)
+		Log("looking for files in %s (last=%s)", dir, last)
 		files, err := filepath.Glob(filepath.Join(dir, pattern))
 		if err != nil {
 			Log("failed glob operation with pattern '%s': %s", pattern, err)
 		}
+		if allowDirs {
+			files = append(files, dir)
+		}
+		files = selectByType(files, allowDirs, allowFiles)
 		if !filepath.IsAbs(pattern) {
 			filesToRel(files)
 		}
@@ -90,6 +88,21 @@ func PredictFiles(pattern string) Predicate {
 	}
 }
 
+func selectByType(names []string, allowDirs bool, allowFiles bool) []string {
+	filtered := make([]string, 0, len(names))
+	for _, name := range names {
+		stat, err := os.Stat(name)
+		if err != nil {
+			continue
+		}
+		if (stat.IsDir() && !allowDirs) || (!stat.IsDir() && !allowFiles) {
+			continue
+		}
+		filtered = append(filtered, name)
+	}
+	return filtered
+}
+
 // filesToRel, change list of files to their names in the relative
 // to current directory form.
 func filesToRel(files []string) {
@@ -106,12 +119,12 @@ func filesToRel(files []string) {
 		if err != nil {
 			continue
 		}
-		if rel == "." {
+		if rel != "." {
-			rel = ""
-		}
-		if !strings.HasPrefix(rel, ".") {
 			rel = "./" + rel
 		}
+		if info, err := os.Stat(rel); err == nil && info.IsDir() {
+			rel += "/"
+		}
 		files[i] = rel
 	}
 	return
@@ -129,6 +142,9 @@ func filesToMatchers(files []string) []match.Matcher {
 // 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 {
+	if info, err := os.Stat(last); err == nil && info.IsDir() {
+		return last
+	}
 	dir := filepath.Dir(last)
 	_, err := os.Stat(dir)
 	if err != nil {

predicate_test.go

@@ -21,6 +21,12 @@ func TestPredicate(t *testing.T) {
 			p:    PredictSet("a", "b", "c"),
 			want: []string{"a", "b", "c"},
 		},
+		{
+			name: "set with does",
+			p:    PredictSet("./..", "./x"),
+			arg:  "./.",
+			want: []string{"./.."},
+		},
 		{
 			name: "set/empty",
 			p:    PredictSet(),
@@ -59,7 +65,7 @@ func TestPredicate(t *testing.T) {
 		{
 			name: "files/txt",
 			p:    PredictFiles("*.txt"),
-			want: []string{"./a.txt", "./b.txt", "./c.txt"},
+			want: []string{"./a.txt", "./b.txt", "./c.txt", "./.dot.txt"},
 		},
 		{
 			name: "files/txt",
@@ -86,24 +92,40 @@ func TestPredicate(t *testing.T) {
 		},
 		{
 			name: "dirs",
-			p:    PredictDirs,
+			p:    PredictDirs("*"),
 			arg:  "./dir/",
-			want: []string{"./dir"},
+			want: []string{"./dir/"},
+		},
+		{
+			name: "dirs and files",
+			p:    PredictFilesOrDirs("*"),
+			arg:  "./dir",
+			want: []string{"./dir/", "./dir/x"},
 		},
 		{
 			name: "dirs",
-			p:    PredictDirs,
+			p:    PredictDirs("*"),
-			want: []string{"./", "./dir"},
+			want: []string{"./", "./dir/"},
+		},
+		{
+			name: "subdir",
+			p:    PredictFiles("*"),
+			arg:  "./dir/",
+			want: []string{"./dir/x"},
 		},
 	}
 
 	for _, tt := range tests {
-		t.Run(tt.name+"/"+tt.arg, func(t *testing.T) {
+		t.Run(tt.name+"?arg='"+tt.arg+"'", func(t *testing.T) {
+
 			matchers := tt.p.predict(tt.arg)
+
 			matchersString := []string{}
 			for _, m := range matchers {
+				if m.Match(tt.arg) {
 					matchersString = append(matchersString, m.String())
 				}
+			}
 			sort.Strings(matchersString)
 			sort.Strings(tt.want)
 
@@ -111,7 +133,7 @@ func TestPredicate(t *testing.T) {
 			want := strings.Join(tt.want, ",")
 
 			if got != want {
-				t.Errorf("failed %s\ngot = %s\nwant: %s", tt.name, got, want)
+				t.Errorf("failed %s\ngot = %s\nwant: %s", t.Name(), got, want)
 			}
 		})
 	}