Use helper HomeDir()

pkg/utils/helpers/common.go

@@ -0,0 +1,50 @@
+/*
+ * Mini Object Storage, (C) 2014 Minio, Inc.
+ *
+ * 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 helpers
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+	"runtime"
+	"strings"
+)
+
+func HomeDir() string {
+	if runtime.GOOS == "windows" {
+		home := os.Getenv("HOMEDRIVE") + os.Getenv("HOMEPATH")
+		if home == "" {
+			home = os.Getenv("USERPROFILE")
+		}
+		return home
+	}
+	return os.Getenv("HOME")
+}
+
+func MakeTempTestDir() (string, error) {
+	return ioutil.TempDir("/tmp", "minio-test-")
+}
+
+func Assert(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func FirstUpper(str string) string {
+	return strings.ToUpper(str[0:1]) + str[1:]
+}

pkg/utils/helpers/execpipe.go

@@ -0,0 +1,63 @@
+/*
+ * Mini Object Storage, (C) 2014 Minio, Inc.
+ *
+ * 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 helpers
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"os/exec"
+)
+
+// A simple ExecPipe() pipes exec.Cmd together - somewhat similar to how bash pipes "|" behave.
+// Each command's standard output is connected to the standard input of the next command
+// and the output of the final command is returned
+
+func ExecPipe(cmds ...*exec.Cmd) (pipeLineOutput io.Reader, pipeLineError error) {
+	// Require at least one command
+	if len(cmds) < 1 {
+		return nil, errors.New("Invalid argument")
+	}
+
+	// Collect the output from the command(s)
+	var output bytes.Buffer
+
+	lastIndex := len(cmds) - 1
+	for i, cmd := range cmds[:lastIndex] {
+		cmds[i+1].Stdin, _ = cmd.StdoutPipe()
+	}
+
+	// Final ---> output buffer
+	cmds[lastIndex].Stdout = &output
+
+	// Start each command
+	for _, cmd := range cmds {
+		if err := cmd.Start(); err != nil {
+			return &output, err
+		}
+	}
+
+	// We should Wait() for each command to complete
+	for _, cmd := range cmds {
+		if err := cmd.Wait(); err != nil {
+			return &output, err
+		}
+	}
+
+	// Return the output
+	return &output, nil
+}

pkg/utils/helpers/execpipe_test.go

@@ -0,0 +1,52 @@
+/*
+ * Mini Object Storage, (C) 2014 Minio, Inc.
+ *
+ * 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 helpers
+
+import (
+	"io/ioutil"
+	"os/exec"
+	"testing"
+
+	. "gopkg.in/check.v1"
+)
+
+type MySuite struct{}
+
+var _ = Suite(&MySuite{})
+
+func Test(t *testing.T) { TestingT(t) }
+
+func (s *MySuite) TestPiping(c *C) {
+	// Collect directories from the command-line
+	dirs := []string{"."}
+
+	// Run the command on each directory
+	for _, dir := range dirs {
+		// find $DIR -type f # Find all files
+		ls := exec.Command("ls", "-l", dir)
+
+		// | sort -t. -k2 # Sort by file extension
+		sort := exec.Command("sort", "-t.", "-k2")
+
+		// Run
+		output, err := ExecPipe(ls, sort)
+		c.Assert(err, IsNil)
+		outputBytes, err := ioutil.ReadAll(output)
+		c.Assert(err, IsNil)
+		c.Assert(len(outputBytes), Not(Equals), 0)
+	}
+}