Fix bug changing run pwd when using --dir (#21)

cmd/root.go

@@ -4,22 +4,31 @@ import (
 	"errors"
 	"fmt"
 	"os"
-	"path"
+	"path/filepath"
+	"strings"
 
 	"github.com/spf13/cobra"
 )
 
+var initWorkDir string
+
 func NewRootCmd() *cobra.Command {
 	rootCmd := &cobra.Command{
 		Use: "nv",
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
-			dir := cmd.Flag("dir").Value.String()
 			workDir, _ := os.Getwd()
-			dirPath := path.Join(workDir, dir)
-			if err := os.Chdir(dirPath); err != nil {
+			initWorkDir = workDir
+
+			dir := cmd.Flag("dir").Value.String()
+			if !strings.HasPrefix(dir, "/") {
+				dir = filepath.Join(workDir, dir)
+			}
+
+			if err := os.Chdir(dir); err != nil {
 				// TODO: other kinds of errors? permission issues?
-				return fmt.Errorf("target directory not found: %s", dirPath)
+				return fmt.Errorf("target directory not found: %s", dir)
 			}
+
 			return nil
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {

cmd/run.go

@@ -55,6 +55,7 @@ func execCommand(cobraCmd *cobra.Command, commandArgs []string) error {
 		args = commandArgs[1:]
 	}
 	cmd := exec.Command(command, args...)
+	cmd.Dir = initWorkDir
 	cmd.Stdin = cobraCmd.InOrStdin()
 	cmd.Stdout = cobraCmd.OutOrStdout()
 	cmd.Stderr = cobraCmd.ErrOrStderr()

test/e2e/cmd-run.yml

@@ -34,3 +34,9 @@ test:
       files: *defaultFiles
       out: |
         something
+  - it: runs command in current dir even when --dir arg provided
+    with:
+      cmd: nv --dir /bin -- pwd
+      pwd: /var
+      out: |
+        /var

test/e2e/e2e.go

@@ -6,7 +6,6 @@ import (
 	"os"
 	"os/exec"
 	"path"
-	"path/filepath"
 	"regexp"
 	"strings"
 	"testing"
@@ -28,7 +27,7 @@ type TestCase struct {
 
 type TestCaseDetails struct {
 	Cmd   string
-	Dir   string
+	Pwd   string
 	Files map[string]string
 	Out   string
 	Err   string
@@ -45,16 +44,6 @@ func RunTestFile(t *testing.T, fileName string) {
 	}
 }
 
-func getTestFiles(t *testing.T) []string {
-	globTarget := path.Join(test.RootDir(), "test/e2e") + "/*.yml"
-	yamlPaths, err := filepath.Glob(globTarget)
-	if err != nil {
-		t.Fatalf("failed to glob test yaml files at path: %s", globTarget)
-	}
-
-	return yamlPaths
-}
-
 func loadTestDef(t *testing.T, filePath string) *TestSubject {
 	yamlData, err := os.ReadFile(filePath)
 	if err != nil {
@@ -73,14 +62,14 @@ func loadTestDef(t *testing.T, filePath string) *TestSubject {
 }
 
 func runTestCase(t *testing.T, testSubject *TestSubject, testCase *TestCase) {
-	if testCase.With.Dir != "" && testCase.With.Files != nil {
-		t.Fatal("invalid test config, only one of with.dir or with.files can be set, not both")
-	} else if testCase.With.Dir == "" {
+	if testCase.With.Pwd != "" && testCase.With.Files != nil {
+		t.Fatal("invalid test config, only one of with.pwd or with.files can be set, not both")
+	} else if testCase.With.Pwd == "" {
 		tmpDir := createTmpDir(t, testCase)
-		testCase.With.Dir = tmpDir
+		testCase.With.Pwd = tmpDir
 	}
 
-	exitCode, outstr, errstr := runCommand(t, testCase.With.Cmd, testCase.With.Dir)
+	exitCode, outstr, errstr := runCommand(t, testCase.With.Cmd, testCase.With.Pwd)
 
 	if exitCode != testCase.With.Exit {
 		t.Fatalf("error: actual exit code '%d' does not match expected '%d'", exitCode, testCase.With.Exit)
@@ -111,7 +100,7 @@ func createTmpDir(t *testing.T, testCase *TestCase) string {
 	return tmpDir
 }
 
-func runCommand(t *testing.T, cmdStr, dir string) (exitCode int, outstr string, errstr string) {
+func runCommand(t *testing.T, cmdStr, pwd string) (exitCode int, outstr string, errstr string) {
 	cmdFields := strings.Fields(cmdStr)
 	cmdName, args := cmdFields[0], []string{}
 	if len(cmdFields) > 1 {
@@ -120,18 +109,18 @@ func runCommand(t *testing.T, cmdStr, dir string) (exitCode int, outstr string,
 
 	cmd := exec.Command(cmdName, args...)
 
-	if strings.HasPrefix(dir, "/") {
-		cmd.Dir = dir
+	if strings.HasPrefix(pwd, "/") {
+		cmd.Dir = pwd
 	} else {
-		cmd.Dir = path.Join(test.RootDir(), dir)
+		cmd.Dir = path.Join(test.RootDir(), pwd)
 	}
 
 	outbuf := bytes.NewBufferString("")
 	errbuf := bytes.NewBufferString("")
 	cmd.Stdout = outbuf
 	cmd.Stderr = errbuf
 
-	err := cmd.Run()
+	_ = cmd.Run()
 
 	outbyte, err := io.ReadAll(outbuf)
 	if err != nil {
@@ -152,7 +141,7 @@ func runCommand(t *testing.T, cmdStr, dir string) (exitCode int, outstr string,
 
 func setPath(nvPath string) {
 	path := os.Getenv("PATH")
-	if strings.Index(path, nvPath) == -1 {
+	if !strings.Contains(path, nvPath) {
 		os.Setenv("PATH", path+":"+nvPath)
 	}
 }