From a031b83a09a8628435317a03f199cdc18b78262f Mon Sep 17 00:00:00 2001 From: Matthew Heon Date: Wed, 1 Nov 2017 11:24:59 -0400 Subject: Initial checkin from CRI-O repo Signed-off-by: Matthew Heon --- vendor/github.com/blang/semver/semver.go | 418 +++++++++++++++++++++++++++++++ 1 file changed, 418 insertions(+) create mode 100644 vendor/github.com/blang/semver/semver.go (limited to 'vendor/github.com/blang/semver/semver.go') 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 +} -- cgit v1.2.3-54-g00ecf