add env var support

add confirmation output for reset command

cmd/reset.go

@@ -19,7 +19,7 @@ This is useful for starting fresh or removing all exclusions at once.`,
 		if !ok {
 			return fmt.Errorf("no exclude file found in context")
 		}
-		return resetAndWriteExcludeFile(ctx.File)
+		return resetAndWriteExcludeFile(ctx.Out, ctx.File)
 	},
 }
 
@@ -31,7 +31,7 @@ func init() {
 type truncater interface{ Truncate(size int64) error }
 
 // resetAndWriteExcludeFile truncates and resets the file, then writes the default content
-func resetAndWriteExcludeFile(f any) error {
+func resetAndWriteExcludeFile(out io.Writer, f any) error {
 	// Try to assert to io.ReadWriteSeeker for file operations
 	rws, ok := f.(io.ReadWriteSeeker)
 	if !ok {
@@ -52,5 +52,10 @@ func resetAndWriteExcludeFile(f any) error {
 	if _, err := rws.Seek(0, 0); err != nil {
 		return fmt.Errorf("error seeking to the beginning of exclude file: %w", err)
 	}
-	return writeDefaultExcludeContent(rws)
+	err := writeDefaultExcludeContent(rws)
+	if err != nil {
+		return fmt.Errorf("error writing default exclude content: %w", err)
+	}
+	fmt.Fprintf(out, "Exclude file reset successfully.\n")
+	return nil
 }

cmd/reset_test.go

@@ -9,7 +9,7 @@ import (
 func TestRunResetCommand(t *testing.T) {
 	var buf bytes.Buffer
 
-	if err := resetAndWriteExcludeFile(&buf); err != nil {
+	if err := resetAndWriteExcludeFile(&buf, &buf); err != nil {
 		t.Fatalf("resetAndWriteExcludeFile failed: %v", err)
 	}
 

cmd/root.go

@@ -4,8 +4,10 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
 )
 
 const defaultExcludeFileContent = `# git ls-files --others --exclude-from=.git/info/exclude
@@ -30,12 +32,7 @@ by excluding certain files or directories from version control.`,
 			return fmt.Errorf("this command must be run in a Git repository")
 		}
 
-		path, err := cmd.Flags().GetString("path")
-		if err != nil {
-			return fmt.Errorf("error reading path flag: %w", err)
-		}
-
-		f, err := os.OpenFile(filepath.Join(path, "exclude"), os.O_RDWR|os.O_APPEND, 0644)
+		f, err := os.OpenFile(filepath.Join(viper.GetString("path"), "exclude"), os.O_RDWR|os.O_APPEND, 0644)
 		if err != nil {
 			return fmt.Errorf("error opening exclude file: %w", err)
 		}
@@ -57,4 +54,11 @@ by excluding certain files or directories from version control.`,
 func init() {
 	RootCmd.PersistentFlags().
 		StringP("path", "p", ".git/info/", "Path the exclude file resides in (default is .git/info/)")
+
+	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+	viper.SetEnvPrefix("EXCLUDE")
+	viper.AutomaticEnv()
+	if err := viper.BindPFlag("path", RootCmd.PersistentFlags().Lookup("path")); err != nil {
+		panic(fmt.Errorf("unable to bind flags: %w", err))
+	}
 }