Support different CommandArgs type

`CommandArgs` has been renamed to `Shell`.

An interface has been added that includes `Executable()` and
`Arguments()` method. The `BaseArgs` implement this methods
and should be embeeded in each type.

1 files changed, 34 insertions, 0 deletions

diff --git a/go/internal/command/commandargs/base_args.go b/go/internal/command/commandargs/base_args.go
new file mode 100644
index 0000000..f65373e
--- /dev/null
+++ b/go/internal/command/commandargs/base_args.go
@@ -0,0 +1,34 @@
+package commandargs
+
+import (
+	"errors"
+	"path/filepath"
+)
+
+type BaseArgs struct {
+	arguments []string
+}
+
+func (b *BaseArgs) Parse() error {
+	if b.hasEmptyArguments() {
+		return errors.New("arguments should include the executable")
+	}
+
+	return nil
+}
+
+func (b *BaseArgs) Executable() Executable {
+	if b.hasEmptyArguments() {
+		return Executable("")
+	}
+
+	return Executable(filepath.Base(b.arguments[0]))
+}
+
+func (b *BaseArgs) Arguments() []string {
+	return b.arguments[1:]
+}
+
+func (b *BaseArgs) hasEmptyArguments() bool {
+	return len(b.arguments) == 0
+}