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