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authorMatthew Heon <matthew.heon@gmail.com>2017-11-01 11:24:59 -0400
committerMatthew Heon <matthew.heon@gmail.com>2017-11-01 11:24:59 -0400
commita031b83a09a8628435317a03f199cdc18b78262f (patch)
treebc017a96769ce6de33745b8b0b1304ccf38e9df0 /vendor/github.com/blang/semver/semver.go
parent2b74391cd5281f6fdf391ff8ad50fd1490f6bf89 (diff)
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Initial checkin from CRI-O repo
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Diffstat (limited to 'vendor/github.com/blang/semver/semver.go')
-rw-r--r--vendor/github.com/blang/semver/semver.go418
1 files changed, 418 insertions, 0 deletions
diff --git a/vendor/github.com/blang/semver/semver.go b/vendor/github.com/blang/semver/semver.go
new file mode 100644
index 000000000..8ee0842e6
--- /dev/null
+++ b/vendor/github.com/blang/semver/semver.go
@@ -0,0 +1,418 @@
+package semver
+
+import (
+ "errors"
+ "fmt"
+ "strconv"
+ "strings"
+)
+
+const (
+ numbers string = "0123456789"
+ alphas = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-"
+ alphanum = alphas + numbers
+)
+
+// SpecVersion is the latest fully supported spec version of semver
+var SpecVersion = Version{
+ Major: 2,
+ Minor: 0,
+ Patch: 0,
+}
+
+// Version represents a semver compatible version
+type Version struct {
+ Major uint64
+ Minor uint64
+ Patch uint64
+ Pre []PRVersion
+ Build []string //No Precendence
+}
+
+// Version to string
+func (v Version) String() string {
+ b := make([]byte, 0, 5)
+ b = strconv.AppendUint(b, v.Major, 10)
+ b = append(b, '.')
+ b = strconv.AppendUint(b, v.Minor, 10)
+ b = append(b, '.')
+ b = strconv.AppendUint(b, v.Patch, 10)
+
+ if len(v.Pre) > 0 {
+ b = append(b, '-')
+ b = append(b, v.Pre[0].String()...)
+
+ for _, pre := range v.Pre[1:] {
+ b = append(b, '.')
+ b = append(b, pre.String()...)
+ }
+ }
+
+ if len(v.Build) > 0 {
+ b = append(b, '+')
+ b = append(b, v.Build[0]...)
+
+ for _, build := range v.Build[1:] {
+ b = append(b, '.')
+ b = append(b, build...)
+ }
+ }
+
+ return string(b)
+}
+
+// Equals checks if v is equal to o.
+func (v Version) Equals(o Version) bool {
+ return (v.Compare(o) == 0)
+}
+
+// EQ checks if v is equal to o.
+func (v Version) EQ(o Version) bool {
+ return (v.Compare(o) == 0)
+}
+
+// NE checks if v is not equal to o.
+func (v Version) NE(o Version) bool {
+ return (v.Compare(o) != 0)
+}
+
+// GT checks if v is greater than o.
+func (v Version) GT(o Version) bool {
+ return (v.Compare(o) == 1)
+}
+
+// GTE checks if v is greater than or equal to o.
+func (v Version) GTE(o Version) bool {
+ return (v.Compare(o) >= 0)
+}
+
+// GE checks if v is greater than or equal to o.
+func (v Version) GE(o Version) bool {
+ return (v.Compare(o) >= 0)
+}
+
+// LT checks if v is less than o.
+func (v Version) LT(o Version) bool {
+ return (v.Compare(o) == -1)
+}
+
+// LTE checks if v is less than or equal to o.
+func (v Version) LTE(o Version) bool {
+ return (v.Compare(o) <= 0)
+}
+
+// LE checks if v is less than or equal to o.
+func (v Version) LE(o Version) bool {
+ return (v.Compare(o) <= 0)
+}
+
+// Compare compares Versions v to o:
+// -1 == v is less than o
+// 0 == v is equal to o
+// 1 == v is greater than o
+func (v Version) Compare(o Version) int {
+ if v.Major != o.Major {
+ if v.Major > o.Major {
+ return 1
+ }
+ return -1
+ }
+ if v.Minor != o.Minor {
+ if v.Minor > o.Minor {
+ return 1
+ }
+ return -1
+ }
+ if v.Patch != o.Patch {
+ if v.Patch > o.Patch {
+ return 1
+ }
+ return -1
+ }
+
+ // Quick comparison if a version has no prerelease versions
+ if len(v.Pre) == 0 && len(o.Pre) == 0 {
+ return 0
+ } else if len(v.Pre) == 0 && len(o.Pre) > 0 {
+ return 1
+ } else if len(v.Pre) > 0 && len(o.Pre) == 0 {
+ return -1
+ }
+
+ i := 0
+ for ; i < len(v.Pre) && i < len(o.Pre); i++ {
+ if comp := v.Pre[i].Compare(o.Pre[i]); comp == 0 {
+ continue
+ } else if comp == 1 {
+ return 1
+ } else {
+ return -1
+ }
+ }
+
+ // If all pr versions are the equal but one has further prversion, this one greater
+ if i == len(v.Pre) && i == len(o.Pre) {
+ return 0
+ } else if i == len(v.Pre) && i < len(o.Pre) {
+ return -1
+ } else {
+ return 1
+ }
+
+}
+
+// Validate validates v and returns error in case
+func (v Version) Validate() error {
+ // Major, Minor, Patch already validated using uint64
+
+ for _, pre := range v.Pre {
+ if !pre.IsNum { //Numeric prerelease versions already uint64
+ if len(pre.VersionStr) == 0 {
+ return fmt.Errorf("Prerelease can not be empty %q", pre.VersionStr)
+ }
+ if !containsOnly(pre.VersionStr, alphanum) {
+ return fmt.Errorf("Invalid character(s) found in prerelease %q", pre.VersionStr)
+ }
+ }
+ }
+
+ for _, build := range v.Build {
+ if len(build) == 0 {
+ return fmt.Errorf("Build meta data can not be empty %q", build)
+ }
+ if !containsOnly(build, alphanum) {
+ return fmt.Errorf("Invalid character(s) found in build meta data %q", build)
+ }
+ }
+
+ return nil
+}
+
+// New is an alias for Parse and returns a pointer, parses version string and returns a validated Version or error
+func New(s string) (vp *Version, err error) {
+ v, err := Parse(s)
+ vp = &v
+ return
+}
+
+// Make is an alias for Parse, parses version string and returns a validated Version or error
+func Make(s string) (Version, error) {
+ return Parse(s)
+}
+
+// ParseTolerant allows for certain version specifications that do not strictly adhere to semver
+// specs to be parsed by this library. It does so by normalizing versions before passing them to
+// Parse(). It currently trims spaces, removes a "v" prefix, and adds a 0 patch number to versions
+// with only major and minor components specified
+func ParseTolerant(s string) (Version, error) {
+ s = strings.TrimSpace(s)
+ s = strings.TrimPrefix(s, "v")
+
+ // Split into major.minor.(patch+pr+meta)
+ parts := strings.SplitN(s, ".", 3)
+ if len(parts) < 3 {
+ if strings.ContainsAny(parts[len(parts)-1], "+-") {
+ return Version{}, errors.New("Short version cannot contain PreRelease/Build meta data")
+ }
+ for len(parts) < 3 {
+ parts = append(parts, "0")
+ }
+ s = strings.Join(parts, ".")
+ }
+
+ return Parse(s)
+}
+
+// Parse parses version string and returns a validated Version or error
+func Parse(s string) (Version, error) {
+ if len(s) == 0 {
+ return Version{}, errors.New("Version string empty")
+ }
+
+ // Split into major.minor.(patch+pr+meta)
+ parts := strings.SplitN(s, ".", 3)
+ if len(parts) != 3 {
+ return Version{}, errors.New("No Major.Minor.Patch elements found")
+ }
+
+ // Major
+ if !containsOnly(parts[0], numbers) {
+ return Version{}, fmt.Errorf("Invalid character(s) found in major number %q", parts[0])
+ }
+ if hasLeadingZeroes(parts[0]) {
+ return Version{}, fmt.Errorf("Major number must not contain leading zeroes %q", parts[0])
+ }
+ major, err := strconv.ParseUint(parts[0], 10, 64)
+ if err != nil {
+ return Version{}, err
+ }
+
+ // Minor
+ if !containsOnly(parts[1], numbers) {
+ return Version{}, fmt.Errorf("Invalid character(s) found in minor number %q", parts[1])
+ }
+ if hasLeadingZeroes(parts[1]) {
+ return Version{}, fmt.Errorf("Minor number must not contain leading zeroes %q", parts[1])
+ }
+ minor, err := strconv.ParseUint(parts[1], 10, 64)
+ if err != nil {
+ return Version{}, err
+ }
+
+ v := Version{}
+ v.Major = major
+ v.Minor = minor
+
+ var build, prerelease []string
+ patchStr := parts[2]
+
+ if buildIndex := strings.IndexRune(patchStr, '+'); buildIndex != -1 {
+ build = strings.Split(patchStr[buildIndex+1:], ".")
+ patchStr = patchStr[:buildIndex]
+ }
+
+ if preIndex := strings.IndexRune(patchStr, '-'); preIndex != -1 {
+ prerelease = strings.Split(patchStr[preIndex+1:], ".")
+ patchStr = patchStr[:preIndex]
+ }
+
+ if !containsOnly(patchStr, numbers) {
+ return Version{}, fmt.Errorf("Invalid character(s) found in patch number %q", patchStr)
+ }
+ if hasLeadingZeroes(patchStr) {
+ return Version{}, fmt.Errorf("Patch number must not contain leading zeroes %q", patchStr)
+ }
+ patch, err := strconv.ParseUint(patchStr, 10, 64)
+ if err != nil {
+ return Version{}, err
+ }
+
+ v.Patch = patch
+
+ // Prerelease
+ for _, prstr := range prerelease {
+ parsedPR, err := NewPRVersion(prstr)
+ if err != nil {
+ return Version{}, err
+ }
+ v.Pre = append(v.Pre, parsedPR)
+ }
+
+ // Build meta data
+ for _, str := range build {
+ if len(str) == 0 {
+ return Version{}, errors.New("Build meta data is empty")
+ }
+ if !containsOnly(str, alphanum) {
+ return Version{}, fmt.Errorf("Invalid character(s) found in build meta data %q", str)
+ }
+ v.Build = append(v.Build, str)
+ }
+
+ return v, nil
+}
+
+// MustParse is like Parse but panics if the version cannot be parsed.
+func MustParse(s string) Version {
+ v, err := Parse(s)
+ if err != nil {
+ panic(`semver: Parse(` + s + `): ` + err.Error())
+ }
+ return v
+}
+
+// PRVersion represents a PreRelease Version
+type PRVersion struct {
+ VersionStr string
+ VersionNum uint64
+ IsNum bool
+}
+
+// NewPRVersion creates a new valid prerelease version
+func NewPRVersion(s string) (PRVersion, error) {
+ if len(s) == 0 {
+ return PRVersion{}, errors.New("Prerelease is empty")
+ }
+ v := PRVersion{}
+ if containsOnly(s, numbers) {
+ if hasLeadingZeroes(s) {
+ return PRVersion{}, fmt.Errorf("Numeric PreRelease version must not contain leading zeroes %q", s)
+ }
+ num, err := strconv.ParseUint(s, 10, 64)
+
+ // Might never be hit, but just in case
+ if err != nil {
+ return PRVersion{}, err
+ }
+ v.VersionNum = num
+ v.IsNum = true
+ } else if containsOnly(s, alphanum) {
+ v.VersionStr = s
+ v.IsNum = false
+ } else {
+ return PRVersion{}, fmt.Errorf("Invalid character(s) found in prerelease %q", s)
+ }
+ return v, nil
+}
+
+// IsNumeric checks if prerelease-version is numeric
+func (v PRVersion) IsNumeric() bool {
+ return v.IsNum
+}
+
+// Compare compares two PreRelease Versions v and o:
+// -1 == v is less than o
+// 0 == v is equal to o
+// 1 == v is greater than o
+func (v PRVersion) Compare(o PRVersion) int {
+ if v.IsNum && !o.IsNum {
+ return -1
+ } else if !v.IsNum && o.IsNum {
+ return 1
+ } else if v.IsNum && o.IsNum {
+ if v.VersionNum == o.VersionNum {
+ return 0
+ } else if v.VersionNum > o.VersionNum {
+ return 1
+ } else {
+ return -1
+ }
+ } else { // both are Alphas
+ if v.VersionStr == o.VersionStr {
+ return 0
+ } else if v.VersionStr > o.VersionStr {
+ return 1
+ } else {
+ return -1
+ }
+ }
+}
+
+// PreRelease version to string
+func (v PRVersion) String() string {
+ if v.IsNum {
+ return strconv.FormatUint(v.VersionNum, 10)
+ }
+ return v.VersionStr
+}
+
+func containsOnly(s string, set string) bool {
+ return strings.IndexFunc(s, func(r rune) bool {
+ return !strings.ContainsRune(set, r)
+ }) == -1
+}
+
+func hasLeadingZeroes(s string) bool {
+ return len(s) > 1 && s[0] == '0'
+}
+
+// NewBuildVersion creates a new valid build version
+func NewBuildVersion(s string) (string, error) {
+ if len(s) == 0 {
+ return "", errors.New("Buildversion is empty")
+ }
+ if !containsOnly(s, alphanum) {
+ return "", fmt.Errorf("Invalid character(s) found in build meta data %q", s)
+ }
+ return s, nil
+}