mirror of https://github.com/docker/cli.git
58 lines
1.6 KiB
Go
58 lines
1.6 KiB
Go
package command
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import (
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"fmt"
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"os"
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)
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// Orchestrator type acts as an enum describing supported orchestrators.
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type Orchestrator string
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const (
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// OrchestratorKubernetes orchestrator
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OrchestratorKubernetes = Orchestrator("kubernetes")
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// OrchestratorSwarm orchestrator
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OrchestratorSwarm = Orchestrator("swarm")
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// OrchestratorAll orchestrator
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OrchestratorAll = Orchestrator("all")
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orchestratorUnset = Orchestrator("unset")
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defaultOrchestrator = OrchestratorSwarm
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envVarDockerOrchestrator = "DOCKER_ORCHESTRATOR"
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)
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func normalize(value string) (Orchestrator, error) {
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switch value {
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case "kubernetes":
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return OrchestratorKubernetes, nil
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case "swarm":
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return OrchestratorSwarm, nil
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case "":
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return orchestratorUnset, nil
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case "all":
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return OrchestratorAll, nil
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default:
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return defaultOrchestrator, fmt.Errorf("specified orchestrator %q is invalid, please use either kubernetes, swarm or all", value)
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}
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}
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// GetOrchestrator checks DOCKER_ORCHESTRATOR environment variable and configuration file
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// orchestrator value and returns user defined Orchestrator.
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func GetOrchestrator(flagValue, value string) (Orchestrator, error) {
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// Check flag
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if o, err := normalize(flagValue); o != orchestratorUnset {
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return o, err
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}
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// Check environment variable
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env := os.Getenv(envVarDockerOrchestrator)
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if o, err := normalize(env); o != orchestratorUnset {
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return o, err
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}
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// Check specified orchestrator
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if o, err := normalize(value); o != orchestratorUnset {
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return o, err
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}
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// Nothing set, use default orchestrator
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return defaultOrchestrator, nil
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}
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