shcizo
8218c61db1
Conflicts: - CLAUDE.md: keep both sets of gotchas (drift/merge from main, SSE ping and swarm_cluster_id from this branch). - internal/imageref/imageref_test.go: keep both TestIsDigest (main) and TestIsRegistryHost (this branch). - internal/master/web/server.go: take main's renderServiceError and make it render through s.page, so service error pages get the sidebar nav data. Also renumber this branch's migration 0005_agent_cluster.sql to 0006_agent_cluster.sql, after main's 0005_drift_merge.sql. Claude-Session: https://claude.ai/code/session_01GAZsp3P7Qto6JnhipxWUJQ
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
// Package imageref splits container image references into repository, tag
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// and digest.
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package imageref
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import (
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"regexp"
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"strings"
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)
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// Ref is an image reference split into its parts. Tag and Digest are empty
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// when the reference has none.
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type Ref struct {
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Repo string
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Tag string
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Digest string
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}
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// Parse splits ref into repository, tag and digest. A colon before the last
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// "/" belongs to a registry host and port ("localhost:5000/foo"), not a tag.
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func Parse(ref string) Ref {
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var r Ref
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if at := strings.Index(ref, "@"); at >= 0 {
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r.Digest = ref[at+1:]
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ref = ref[:at]
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}
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slash := strings.LastIndex(ref, "/")
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last := ref[slash+1:]
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if colon := strings.Index(last, ":"); colon >= 0 {
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r.Tag = last[colon+1:]
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ref = ref[:slash+1+colon]
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}
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r.Repo = ref
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return r
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}
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// IsRegistryHost reports whether the first path segment of a repository names
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// a registry: it contains a "." or ":" or is "localhost".
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func IsRegistryHost(segment string) bool {
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return strings.ContainsAny(segment, ".:") || segment == "localhost"
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}
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// String reassembles the reference as repo[:tag][@digest].
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func (r Ref) String() string {
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s := r.Repo
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if r.Tag != "" {
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s += ":" + r.Tag
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}
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if r.Digest != "" {
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s += "@" + r.Digest
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}
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return s
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}
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var digestPattern = regexp.MustCompile(`^sha256:[0-9a-f]{64}$`)
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// IsDigest reports whether d is a well-formed sha256 digest.
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func IsDigest(d string) bool { return digestPattern.MatchString(d) }
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