first commit

internal/command/command.go

@@ -0,0 +1,44 @@
+/*
+© Copyright IBM Corporation 2017, 2022
+
+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 command contains code to run external commands
+package command
+
+import (
+	"context"
+	"fmt"
+	"os/exec"
+)
+
+// Run runs an OS command.  On Linux it waits for the command to
+// complete and returns the exit status (return code).
+// Do not use this function to run shell built-ins (like "cd"), because
+// the error handling works differently
+func Run(name string, arg ...string) (string, int, error) {
+	return RunContext(context.Background(), name, arg...)
+}
+
+func RunContext(ctx context.Context, name string, arg ...string) (string, int, error) {
+	// Run the command and wait for completion
+	// #nosec G204
+	cmd := exec.CommandContext(ctx, name, arg...)
+	out, err := cmd.CombinedOutput()
+	rc := cmd.ProcessState.ExitCode()
+	if err != nil {
+		return string(out), rc, fmt.Errorf("%v: %v", cmd.Path, err)
+	}
+	return string(out), rc, nil
+}