94 lines
2.2 KiB
Go
94 lines
2.2 KiB
Go
package docker
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import (
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"fmt"
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"strings"
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"github.com/coreos/go-semver/semver"
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)
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// DefaultTagSuffix returns a set of default suggested tags
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// based on the commit ref with an attached suffix.
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func DefaultTagSuffix(ref, suffix string) ([]string, error) {
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tags, err := DefaultTags(ref)
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if err != nil {
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return nil, err
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}
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if len(suffix) == 0 {
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return tags, nil
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}
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for i, tag := range tags {
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if tag == "latest" {
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tags[i] = suffix
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} else {
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tags[i] = fmt.Sprintf("%s-%s", tag, suffix)
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}
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}
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return tags, nil
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}
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func splitOff(input string, delim string) string {
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parts := strings.SplitN(input, delim, 2)
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if len(parts) == 2 {
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return parts[0]
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}
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return input
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}
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// DefaultTags returns a set of default suggested tags based on
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// the commit ref.
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func DefaultTags(ref string) ([]string, error) {
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if !strings.HasPrefix(ref, "refs/tags/") {
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return []string{"latest"}, nil
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}
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v := stripTagPrefix(ref)
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version, err := semver.NewVersion(v)
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if err != nil {
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return []string{"latest"}, err
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}
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if version.PreRelease != "" || version.Metadata != "" {
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return []string{
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version.String(),
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}, nil
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}
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v = stripTagPrefix(ref)
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v = splitOff(splitOff(v, "+"), "-")
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dotParts := strings.SplitN(v, ".", 3)
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if version.Major == 0 {
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return []string{
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fmt.Sprintf("%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor),
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fmt.Sprintf("%0*d.%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor, len(dotParts[2]), version.Patch),
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}, nil
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}
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return []string{
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fmt.Sprintf("%0*d", len(dotParts[0]), version.Major),
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fmt.Sprintf("%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor),
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fmt.Sprintf("%0*d.%0*d.%0*d", len(dotParts[0]), version.Major, len(dotParts[1]), version.Minor, len(dotParts[2]), version.Patch),
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}, nil
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}
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// UseDefaultTag for keep only default branch for latest tag
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func UseDefaultTag(ref, defaultBranch string) bool {
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if strings.HasPrefix(ref, "refs/tags/") {
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return true
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}
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if stripHeadPrefix(ref) == defaultBranch {
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return true
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}
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return false
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}
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func stripHeadPrefix(ref string) string {
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return strings.TrimPrefix(ref, "refs/heads/")
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}
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func stripTagPrefix(ref string) string {
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ref = strings.TrimPrefix(ref, "refs/tags/")
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ref = strings.TrimPrefix(ref, "v")
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return ref
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}
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