Ilia Denisov
61 lines
1.9 KiB
Go
61 lines
1.9 KiB
Go
package engineversion
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import (
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"fmt"
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"strings"
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"golang.org/x/mod/semver"
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)
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// ParseSemver normalises version into the canonical "vMAJOR.MINOR.PATCH"
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// form expected by `golang.org/x/mod/semver` and reports a wrapped
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// ErrInvalidSemver when the resulting string is not a valid full semver.
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//
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// Whitespace is trimmed; a missing leading "v" is added before the
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// validity check so callers may pass either "1.2.3" or "v1.2.3". The
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// stripped base must carry exactly three dot-separated numeric
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// components — `golang.org/x/mod/semver` accepts shortened forms such
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// as "v1" or "v1.2", but the engine-version registry requires the full
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// triple, so this function rejects anything narrower.
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func ParseSemver(version string) (string, error) {
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candidate := strings.TrimSpace(version)
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if candidate == "" {
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return "", fmt.Errorf("%w: empty", ErrInvalidSemver)
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}
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if !strings.HasPrefix(candidate, "v") {
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candidate = "v" + candidate
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}
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if !semver.IsValid(candidate) {
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return "", fmt.Errorf("%w: %q", ErrInvalidSemver, version)
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}
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base := candidate
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if i := strings.IndexAny(base, "-+"); i >= 0 {
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base = base[:i]
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}
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if strings.Count(base, ".") != 2 {
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return "", fmt.Errorf(
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"%w: %q (need vMAJOR.MINOR.PATCH)",
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ErrInvalidSemver, version,
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)
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}
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return candidate, nil
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}
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// IsPatchUpgrade reports whether next is a same-major.minor upgrade of
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// current. Both inputs are parsed through ParseSemver so callers may
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// pass either bare or `v`-prefixed forms. A wrapped ErrInvalidSemver is
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// returned when either argument fails to parse; the boolean result is
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// undefined in that case.
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func IsPatchUpgrade(current, next string) (bool, error) {
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curr, err := ParseSemver(current)
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if err != nil {
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return false, fmt.Errorf("current: %w", err)
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}
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nxt, err := ParseSemver(next)
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if err != nil {
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return false, fmt.Errorf("next: %w", err)
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}
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return semver.MajorMinor(curr) == semver.MajorMinor(nxt), nil
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}
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