github.com/jasonkeene/cli@v6.14.1-0.20160816203908-ca5715166dfb+incompatible/plugin/plugin_shim.go (about)

     1  package plugin
     2  
     3  import (
     4  	"fmt"
     5  	"os"
     6  	"strconv"
     7  )
     8  
     9  /**
    10  	* This function is called by the plugin to setup their server. This allows us to call Run on the plugin
    11  	* os.Args[1] port CF_CLI rpc server is running on
    12  	* os.Args[2] **OPTIONAL**
    13  		* SendMetadata - used to fetch the plugin metadata
    14  **/
    15  func Start(cmd Plugin) {
    16  	cliConnection := NewCliConnection(os.Args[1])
    17  
    18  	cliConnection.pingCLI()
    19  	if isMetadataRequest(os.Args) {
    20  		cliConnection.sendPluginMetadataToCliServer(cmd.GetMetadata())
    21  	} else {
    22  		if version := MinCliVersionStr(cmd.GetMetadata().MinCliVersion); version != "" {
    23  			ok := cliConnection.isMinCliVersion(version)
    24  			if !ok {
    25  				fmt.Printf("Minimum CLI version %s is required to run this plugin command\n\n", version)
    26  				os.Exit(0)
    27  			}
    28  		}
    29  
    30  		cmd.Run(cliConnection, os.Args[2:])
    31  	}
    32  }
    33  
    34  func isMetadataRequest(args []string) bool {
    35  	return len(args) == 3 && args[2] == "SendMetadata"
    36  }
    37  
    38  func MinCliVersionStr(version VersionType) string {
    39  	if version.Major == 0 && version.Minor == 0 && version.Build == 0 {
    40  		return ""
    41  	}
    42  
    43  	return strconv.Itoa(version.Major) + "." + strconv.Itoa(version.Minor) + "." + strconv.Itoa(version.Build)
    44  }