drone-docker-buildx/tags.go

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