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node_cmd.go
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node_cmd.go
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package ogimpl
import (
"context"
"errors"
"fmt"
"log/slog"
"os"
"os/exec"
"strings"
"github.com/symphony09/ograph"
"github.com/symphony09/ograph/ogcore"
)
var CmdNodeFactory = func() ogcore.Node {
return &CmdNode{}
}
type CmdNode struct {
ograph.BaseNode
*slog.Logger
Cmd []string
Env []string
Dir string
Path string
}
func (node *CmdNode) Run(ctx context.Context, state ogcore.State) error {
if node.Logger == nil {
node.Logger = slog.Default()
}
if len(node.Cmd) == 0 {
return errors.New("cmd is empty")
}
if !node.CmdIsAllowed() {
node.Logger.Error("exec cmd is not allowed", "Cmd", node.Cmd)
return errors.New("cmd is not allowed")
}
var args []string
if len(node.Cmd) > 1 {
args = node.Cmd[1:]
}
cmd := exec.Command(node.Cmd[0], args...)
cmd.Env = node.Env
cmd.Dir = node.Dir
if node.Path != "" {
cmd.Path = node.Path
}
output, err := cmd.CombinedOutput()
if err != nil {
node.Logger.Error("exec cmd failed", "Cmd", strings.Join(node.Cmd, " "), "Output", string(output))
return fmt.Errorf("exec cmd failed, err: %w", err)
}
node.Logger.Info("exec cmd succeed", "Cmd", strings.Join(node.Cmd, " "), "Output", string(output))
return nil
}
func (node *CmdNode) CmdIsAllowed() bool {
if len(node.Cmd) == 0 {
return false
}
allowCmdList := os.Getenv("OGRAPH_ALLOW_CMD_LIST")
if allowCmdList == "" {
return true
}
for _, allowCmd := range strings.Split(allowCmdList, ",") {
allowCmd = strings.TrimSpace(allowCmd)
if node.Cmd[0] == allowCmd {
return true
}
}
return false
}