restructure: command package

internal/command/color.go

@@ -0,0 +1,25 @@
+package command
+
+import "fmt"
+
+var (
+	Info    = Teal
+	Success = Green
+	Warning = Yellow
+	Fatal   = Red
+)
+
+var (
+	Red    = Color("\033[1;31m%s\033[0m")
+	Yellow = Color("\033[1;33m%s\033[0m")
+	Green  = Color("\033[1;32m%s\033[0m")
+	Teal   = Color("\033[1;36m%s\033[0m")
+)
+
+func Color(colorString string) func(...interface{}) string {
+	sprint := func(args ...interface{}) string {
+		return fmt.Sprintf(colorString,
+			fmt.Sprint(args...))
+	}
+	return sprint
+}

internal/command/command.go

@@ -0,0 +1,73 @@
+package command
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func ExecuteStopOnError(command string, directory string, variables map[string]string) string {
+	result, err := Execute(command, directory, variables)
+	if err != nil {
+		log.Print(result)
+		log.Fatal(err)
+	}
+	return result
+}
+
+func Execute(command string, directory string, variables map[string]string) (string, error) {
+	expandedCommand := command
+	environment := os.Environ()
+
+	for key, value := range variables {
+		commandKey := fmt.Sprintf("$%s", key)
+		expandedCommand = strings.ReplaceAll(expandedCommand, commandKey, value)
+		environment = append(environment, fmt.Sprintf("%s=%s", key, value))
+	}
+
+	commandParts := strings.Split(expandedCommand, " ")
+	commandExecutor := exec.Command(commandParts[0], commandParts[1:]...)
+
+	commandExecutor.Env = environment
+	commandExecutor.Dir = directory
+
+	logReader, initErr := commandExecutor.StdoutPipe()
+	if initErr != nil {
+		return fmt.Sprintf("Executing command: %s in %s, crashed before receiving any output", expandedCommand, directory), initErr
+	}
+
+	commandExecutor.Stderr = commandExecutor.Stdout
+
+	startError := commandExecutor.Start()
+
+	if startError != nil {
+		return fmt.Sprintf("Executing command: %s in %s, crashed before receiving any output", expandedCommand, directory), startError
+	}
+
+	var outputBuffer bytes.Buffer
+
+	scanner := bufio.NewScanner(logReader)
+
+	outputBuffer.Write([]byte("COMMAND: " + Info(expandedCommand) + " in DIRECTORY: " + Info(directory)))
+
+	for scanner.Scan() {
+		outputBuffer.WriteRune('\n')
+		outputBuffer.Write(scanner.Bytes())
+	}
+
+	if err := scanner.Err(); err != nil {
+		commandExecutor.Wait()
+		return outputBuffer.String(), err
+	}
+
+	waitError := commandExecutor.Wait()
+	if waitError != nil {
+		return outputBuffer.String(), waitError
+	}
+
+	return outputBuffer.String(), nil
+}