stdbin: adding mkdir

Makefile

@@ -7,8 +7,9 @@ buildargs = -ldflags "-X main.VersionString=$(version)" -v
 all: build test install
 
 build:
-	go build $(buildargs) -o ./cmd/nash/nash ./cmd/nash
-	go build $(buildargs) -o ./cmd/nashfmt/nashfmt ./cmd/nashfmt
+	cd cmd/nash && go build $(buildargs) 
+	cd cmd/nashfmt && go build $(buildargs) 
+	cd stdbin/mkdir && go build $(buildargs)
 
 NASHPATH=$(HOME)/nash
 NASHROOT=$(HOME)/nashroot
@@ -23,6 +24,7 @@ install: build
 	cp -p ./cmd/nashfmt/nashfmt $(NASHROOT)/bin
 	rm -rf $(NASHROOT)/stdlib
 	cp -pr ./stdlib $(NASHROOT)/stdlib
+	cp -pr ./stdbin/mkdir/mkdir $(NASHROOT)/bin/mkdir
 
 deps:
 	go get -v -t golang.org/x/exp/ebnf

stdbin/mkdir/main.go

@@ -0,0 +1,28 @@
+package main 
+
+import (
+	"os"
+	"fmt"
+)
+
+func mkdirs(dirnames []string) error {
+	for _, d := range dirnames {
+		if err := os.MkdirAll(d, 0644); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Fprintf(os.Stderr, "usage: %s <dir1> <dir2> ...\n", os.Args[0])
+		os.Exit(1)
+	}
+	err := mkdirs(os.Args[1:])
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %s\n", err.Error())
+		os.Exit(1)
+	}
+}

stdbin/mkdir/mkdir_test.go

@@ -0,0 +1,38 @@
+package main 
+
+import (
+	"testing"
+	"path"
+	"path/filepath"
+	"io/ioutil"
+	"os"
+	"fmt"
+)
+
+func TestMkdir(t *testing.T) {
+	tmpDir, err := ioutil.TempDir("", "nash-mkdir")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	testDirs := []string{
+		"1", "2", "3", "4", "5",
+		"some", "thing", "_random_",
+		"_",
+	}
+
+	defer os.RemoveAll(tmpDir)
+	for _, p := range testDirs {
+		testdir := filepath.FromSlash(path.Join(tmpDir, p))
+		err = mkdirs([]string{testdir})
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if s, err := os.Stat(testdir); err != nil {
+			t.Fatal(err)
+		} else if s.Mode()&os.ModeDir != os.ModeDir {
+			t.Errorf("Invalid directory mode: %v", s.Mode())
+		}
+	}
+}