| package system |
| |
| import ( |
| "fmt" |
| "runtime" |
| "strings" |
| |
| specs "github.com/opencontainers/image-spec/specs-go/v1" |
| ) |
| |
| // ValidatePlatform determines if a platform structure is valid. |
| // TODO This is a temporary function - can be replaced by parsing from |
| // https://github.com/containerd/containerd/pull/1403/files at a later date. |
| // @jhowardmsft |
| func ValidatePlatform(platform *specs.Platform) error { |
| platform.Architecture = strings.ToLower(platform.Architecture) |
| platform.OS = strings.ToLower(platform.OS) |
| // Based on https://github.com/moby/moby/pull/34642#issuecomment-330375350, do |
| // not support anything except operating system. |
| if platform.Architecture != "" { |
| return fmt.Errorf("invalid platform architecture %q", platform.Architecture) |
| } |
| if platform.OS != "" { |
| if !(platform.OS == runtime.GOOS || (LCOWSupported() && platform.OS == "linux")) { |
| return fmt.Errorf("invalid platform os %q", platform.OS) |
| } |
| } |
| if len(platform.OSFeatures) != 0 { |
| return fmt.Errorf("invalid platform osfeatures %q", platform.OSFeatures) |
| } |
| if platform.OSVersion != "" { |
| return fmt.Errorf("invalid platform osversion %q", platform.OSVersion) |
| } |
| if platform.Variant != "" { |
| return fmt.Errorf("invalid platform variant %q", platform.Variant) |
| } |
| return nil |
| } |
| |
| // ParsePlatform parses a platform string in the format os[/arch[/variant] |
| // into an OCI image-spec platform structure. |
| // TODO This is a temporary function - can be replaced by parsing from |
| // https://github.com/containerd/containerd/pull/1403/files at a later date. |
| // @jhowardmsft |
| func ParsePlatform(in string) *specs.Platform { |
| p := &specs.Platform{} |
| elements := strings.SplitN(strings.ToLower(in), "/", 3) |
| if len(elements) == 3 { |
| p.Variant = elements[2] |
| } |
| if len(elements) >= 2 { |
| p.Architecture = elements[1] |
| } |
| if len(elements) >= 1 { |
| p.OS = elements[0] |
| } |
| return p |
| } |
| |
| // IsOSSupported determines if an operating system is supported by the host |
| func IsOSSupported(os string) bool { |
| if runtime.GOOS == os { |
| return true |
| } |
| if LCOWSupported() && os == "linux" { |
| return true |
| } |
| return false |
| } |