64 lines
2.0 KiB
Go
64 lines
2.0 KiB
Go
 
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package branch
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import (
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"fmt"
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"regexp"
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"strconv"
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)
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// DefaultBranchPattern matches "release/X.Y" or "origin/release/X.Y".
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// Group 1 = major, group 2 = minor.
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const DefaultBranchPattern = `^(?:.*/)?release/(\d+)\.(\d+)$`
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// Info holds the major.minor version pinned by the branch name, plus the tag prefix from config.
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type Info struct {
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Major int
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Minor int
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TagPrefix string // set from config after Parse (default "v")
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}
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// Parse extracts major and minor from a branch name using the provided regex pattern.
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// The pattern must contain exactly two capture groups: group 1 = major, group 2 = minor.
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// TagPrefix is left at its zero value — the caller sets it from config.
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func Parse(name, pattern string) (Info, error) {
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re, err := regexp.Compile(pattern)
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if err != nil {
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return Info{}, fmt.Errorf("invalid branch pattern %q: %w", pattern, err)
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}
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m := re.FindStringSubmatch(name)
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if len(m) < 3 {
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return Info{}, fmt.Errorf("branch %q does not match pattern %q", name, pattern)
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}
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major, err := strconv.Atoi(m[1])
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if err != nil {
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return Info{}, fmt.Errorf("invalid major version in branch %q: %w", name, err)
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}
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minor, err := strconv.Atoi(m[2])
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if err != nil {
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return Info{}, fmt.Errorf("invalid minor version in branch %q: %w", name, err)
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}
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return Info{Major: major, Minor: minor}, nil
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}
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// MatchesTag checks whether a tag (e.g. "v1.2.3" or "1.2.3") belongs to this branch's version range.
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// Uses TagPrefix to match the expected format. Returns the patch number and true on match.
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func (i Info) MatchesTag(tag string) (patch int, ok bool) {
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prefix := fmt.Sprintf("%s%d.%d.", i.TagPrefix, i.Major, i.Minor)
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if len(tag) <= len(prefix) || tag[:len(prefix)] != prefix {
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return 0, false
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}
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p, err := strconv.Atoi(tag[len(prefix):])
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if err != nil {
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return 0, false
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}
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return p, true
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}
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// TagName formats a version string (e.g. "1.2.4") into a full tag name (e.g. "v1.2.4" or "1.2.4").
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func (i Info) TagName(version string) string {
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return i.TagPrefix + version
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}
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