feat: step shell with env variables

hrp/step_shell.go

@@ -2,6 +2,7 @@ package hrp
 
 import (
 	"fmt"
+	"os"
 	"time"
 
 	"github.com/httprunner/funplugin/myexec"
@@ -84,6 +85,11 @@ func runStepShell(r *SessionRunner, step *TStep) (stepResult *StepResult, err er
 		ContentSize: 0,
 	}
 
+	vars := r.caseRunner.parsedConfig.Variables
+	for key, value := range vars {
+		os.Setenv(key, fmt.Sprintf("%v", value))
+	}
+
 	start := time.Now()
 	exitCode, err := myexec.RunShell(shell.String)
 	stepResult.Elapsed = time.Since(start).Milliseconds()