README
¶
Versioning Library for Go
go-version is a library for parsing versions and version constraints, and verifying versions against a set of constraints. go-version can sort a collection of versions properly, handles prerelease/beta versions, can increment versions, etc.
Versions used with go-version must follow SemVer.
Installation and Usage
Package documentation can be found on GoDoc.
Installation can be done with a normal go get:
$ go get github.com/anchore/go-version
Version Parsing and Comparison
v1, err := version.NewVersion("1.2")
v2, err := version.NewVersion("1.5+metadata")
// Comparison example. There is also GreaterThan, Equal, and just
// a simple Compare that returns an int allowing easy >=, <=, etc.
if v1.LessThan(v2) {
fmt.Printf("%s is less than %s", v1, v2)
}
Version Constraints
v1, err := version.NewVersion("1.2")
// Constraints example.
constraints, err := version.NewConstraint(">= 1.0, < 1.4")
if constraints.Check(v1) {
fmt.Printf("%s satisfies constraints %s", v1, constraints)
}
Version Sorting
versionsRaw := []string{"1.1", "0.7.1", "1.4-beta", "1.4", "2"}
versions := make([]*version.Version, len(versionsRaw))
for i, raw := range versionsRaw {
v, _ := version.NewVersion(raw)
versions[i] = v
}
// After this, the versions are properly sorted
sort.Sort(version.Collection(versions))
Issues and Contributing
If you find an issue with this library, please report an issue. If you'd like, we welcome any contributions. Fork this library and submit a pull request.
Documentation
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Index ¶
- Constants
- type Collection
- type Constraint
- type Constraints
- type Version
- func (v *Version) Compare(other *Version) int
- func (v *Version) Equal(o *Version) bool
- func (v *Version) GreaterThan(o *Version) bool
- func (v *Version) GreaterThanOrEqual(o *Version) bool
- func (v *Version) LessThan(o *Version) bool
- func (v *Version) LessThanOrEqual(o *Version) bool
- func (v Version) MarshalJSON() ([]byte, error)
- func (v *Version) Metadata() string
- func (v *Version) Original() string
- func (v *Version) Prerelease() string
- func (v *Version) Segments() []int
- func (v *Version) Segments64() []int64
- func (v *Version) String() string
- func (v *Version) UnmarshalJSON(b []byte) error
Constants ¶
const ( VersionRegexpRaw string = `v?([0-9]+(\.[0-9]+)*?)` + `(-([0-9]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)|(-?([A-Za-z\-~]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)))?` + `(\+([0-9A-Za-z\-~]+(\.[0-9A-Za-z\-~]+)*))?` + `?` // SemverRegexpRaw requires a separator between version and prerelease SemverRegexpRaw string = `v?([0-9]+(\.[0-9]+)*?)` + `(-([0-9]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)|(-([A-Za-z\-~]+[0-9A-Za-z\-~]*(\.[0-9A-Za-z\-~]+)*)))?` + `(\+([0-9A-Za-z\-~]+(\.[0-9A-Za-z\-~]+)*))?` + `?` )
The raw regular expression string used for testing the validity of a version.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Collection ¶
type Collection []*Version
Collection is a type that implements the sort.Interface interface so that versions can be sorted.
func (Collection) Len ¶
func (v Collection) Len() int
func (Collection) Less ¶
func (v Collection) Less(i, j int) bool
func (Collection) Swap ¶
func (v Collection) Swap(i, j int)
type Constraint ¶
type Constraint struct {
// contains filtered or unexported fields
}
Constraint represents a single constraint for a version, such as ">= 1.0".
func (*Constraint) Check ¶
func (c *Constraint) Check(v *Version) bool
Check tests if a constraint is validated by the given version.
func (*Constraint) String ¶
func (c *Constraint) String() string
type Constraints ¶
type Constraints [][]*Constraint
Constraints is a 2D slice of constraints.
func NewConstraint ¶
func NewConstraint(cs string) (Constraints, error)
NewConstraint will parse one or more constraints from the given constraint string. The string must be a comma or pipe separated list of constraints.
func (Constraints) Check ¶
func (cs Constraints) Check(v *Version) bool
Check tests if a version satisfies all the constraints.
func (*Constraints) MarshalJSON ¶
func (c *Constraints) MarshalJSON() ([]byte, error)
MarshalJSON - implement the json-Marshaler interface
func (Constraints) String ¶
func (cs Constraints) String() string
Returns the string format of the constraints
func (*Constraints) UnmarshalJSON ¶
func (c *Constraints) UnmarshalJSON(data []byte) (err error)
UnmarshalJSON - implement the json-Unmarshaler interface
type Version ¶
type Version struct {
// contains filtered or unexported fields
}
Version represents a single version.
func Must ¶
Must is a helper that wraps a call to a function returning (*Version, error) and panics if error is non-nil.
func NewSemver ¶
NewSemver parses the given version and returns a new Version that adheres strictly to SemVer specs https://semver.org/
func NewVersion ¶
NewVersion parses the given version and returns a new Version.
func (*Version) Compare ¶
Compare compares this version to another version. This returns -1, 0, or 1 if this version is smaller, equal, or larger than the other version, respectively.
If you want boolean results, use the LessThan, Equal, GreaterThan, GreaterThanOrEqual or LessThanOrEqual methods.
func (*Version) GreaterThan ¶
GreaterThan tests if this version is greater than another version.
func (*Version) GreaterThanOrEqual ¶
GreaterThanOrEqual tests if this version is greater than or equal to another version.
func (*Version) LessThanOrEqual ¶
LessThanOrEqual tests if this version is less than or equal to another version.
func (Version) MarshalJSON ¶
MarshalJSON implements the enconding/json.MarshalJSON interface
func (*Version) Metadata ¶
Metadata returns any metadata that was part of the version string.
Metadata is anything that comes after the "+" in the version. For example, with "1.2.3+beta", the metadata is "beta".
func (*Version) Original ¶
Original returns the original parsed version as-is, including any potential whitespace, `v` prefix, etc.
func (*Version) Prerelease ¶
Prerelease returns any prerelease data that is part of the version, or blank if there is no prerelease data.
Prerelease information is anything that comes after the "-" in the version (but before any metadata). For example, with "1.2.3-beta", the prerelease information is "beta".
func (*Version) Segments ¶
Segments returns the numeric segments of the version as a slice of ints.
This excludes any metadata or pre-release information. For example, for a version "1.2.3-beta", segments will return a slice of 1, 2, 3.
func (*Version) Segments64 ¶
Segments64 returns the numeric segments of the version as a slice of int64s.
This excludes any metadata or pre-release information. For example, for a version "1.2.3-beta", segments will return a slice of 1, 2, 3.
func (*Version) String ¶
String returns the full version string included pre-release and metadata information.
This value is rebuilt according to the parsed segments and other information. Therefore, ambiguities in the version string such as prefixed zeroes (1.04.0 => 1.4.0), `v` prefix (v1.0.0 => 1.0.0), and missing parts (1.0 => 1.0.0) will be made into a canonicalized form as shown in the parenthesized examples.
func (*Version) UnmarshalJSON ¶
UnmarshalJSON implements the enconding/json.UnmarshalJSON interface
Source Files