mirror of
https://github.com/edgelesssys/constellation.git
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fc33a74c78
The variable VersionInfo is supposed to be set by `go build -X ...` during link time but should not be modified at runtime. This change ensures the underlying var is private and can only be accessed by a public getter.
106 lines
2.7 KiB
Go
106 lines
2.7 KiB
Go
/*
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Copyright (c) Edgeless Systems GmbH
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SPDX-License-Identifier: AGPL-3.0-only
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*/
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/*
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Package semver provides functionality to parse and process semantic versions, as they are used in multiple components of Constellation.
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*/
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package semver
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import (
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"encoding/json"
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"fmt"
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"strings"
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"github.com/edgelesssys/constellation/v2/internal/constants"
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"golang.org/x/mod/semver"
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)
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// Semver represents a semantic version.
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type Semver struct {
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Major int
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Minor int
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Patch int
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}
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// NewSemver returns a Version from a string.
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func NewSemver(version string) (Semver, error) {
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// ensure that semver has "v" prefix
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if !strings.HasPrefix(version, "v") {
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version = "v" + version
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}
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if !semver.IsValid(version) {
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return Semver{}, fmt.Errorf("invalid semver: %s", version)
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}
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version = semver.Canonical(version)
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var major, minor, patch int
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_, err := fmt.Sscanf(version, "v%d.%d.%d", &major, &minor, &patch)
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if err != nil {
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return Semver{}, fmt.Errorf("parsing semver parts: %w", err)
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}
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return Semver{
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Major: major,
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Minor: minor,
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Patch: patch,
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}, nil
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}
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// String returns the string representation of the version.
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func (v Semver) String() string {
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return fmt.Sprintf("v%d.%d.%d", v.Major, v.Minor, v.Patch)
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}
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// Compare compares two versions. It relies on the semver.Compare function internally.
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func (v Semver) Compare(other Semver) int {
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return semver.Compare(v.String(), other.String())
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}
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// IsUpgradeTo returns if a version is an upgrade to another version.
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// It checks if the version of v is greater than the version of other and allows a drift of at most one minor version.
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func (v Semver) IsUpgradeTo(other Semver) bool {
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return v.Compare(other) > 0 && v.Major == other.Major && v.Minor-other.Minor <= 1
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}
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// CompatibleWithBinary returns if a version is compatible version of the current built binary.
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// It checks if the version of the binary is equal or greater than the current version and allows a drift of at most one minor version.
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func (v Semver) CompatibleWithBinary() bool {
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binaryVersion, err := NewSemver(constants.VersionInfo())
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if err != nil {
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return false
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}
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return v.Compare(binaryVersion) == 0 || binaryVersion.IsUpgradeTo(v)
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}
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// NextMinor returns the next minor version in the format "vMAJOR.MINOR".
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func (v Semver) NextMinor() string {
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return fmt.Sprintf("v%d.%d", v.Major, v.Minor+1)
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}
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// MarshalJSON implements the json.Marshaler interface.
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func (v Semver) MarshalJSON() ([]byte, error) {
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return []byte(fmt.Sprintf(`"%s"`, v.String())), nil
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}
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// UnmarshalJSON implements the json.Unmarshaler interface.
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func (v *Semver) UnmarshalJSON(data []byte) error {
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var s string
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if err := json.Unmarshal(data, &s); err != nil {
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return err
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}
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version, err := NewSemver(s)
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if err != nil {
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return err
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}
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*v = version
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return nil
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}
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