Source file src/github.com/Microsoft/hcsshim/cmd/runhcs/spec.go

Documentation: github.com/Microsoft/hcsshim/cmd/runhcs

     1  //go:build windows
     2  
     3  package main
     4  
     5  import (
     6  	"encoding/json"
     7  	"fmt"
     8  	"os"
     9  
    10  	"github.com/opencontainers/runtime-spec/specs-go"
    11  	"github.com/urfave/cli"
    12  )
    13  
    14  // loadSpec loads the specification from the provided path.
    15  func loadSpec(cPath string) (spec *specs.Spec, err error) {
    16  	cf, err := os.Open(cPath)
    17  	if err != nil {
    18  		if os.IsNotExist(err) {
    19  			return nil, fmt.Errorf("JSON specification file %s not found", cPath)
    20  		}
    21  		return nil, err
    22  	}
    23  	defer cf.Close()
    24  
    25  	if err = json.NewDecoder(cf).Decode(&spec); err != nil {
    26  		return nil, err
    27  	}
    28  	return spec, nil
    29  }
    30  
    31  // setupSpec performs initial setup based on the cli.Context for the container
    32  func setupSpec(context *cli.Context) (*specs.Spec, error) {
    33  	bundle := context.String("bundle")
    34  	if bundle != "" {
    35  		if err := os.Chdir(bundle); err != nil {
    36  			return nil, err
    37  		}
    38  	}
    39  	spec, err := loadSpec(specConfig)
    40  	if err != nil {
    41  		return nil, err
    42  	}
    43  	return spec, nil
    44  }
    45  

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