195 lines
6.0 KiB
Markdown
195 lines
6.0 KiB
Markdown
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semver for golang [](https://travis-ci.org/blang/semver) [](https://godoc.org/github.com/blang/semver) [](https://coveralls.io/r/blang/semver?branch=master)
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======
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semver is a [Semantic Versioning](http://semver.org/) library written in golang. It fully covers spec version `2.0.0`.
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Usage
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-----
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```bash
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$ go get github.com/blang/semver
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```
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Note: Always vendor your dependencies or fix on a specific version tag.
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```go
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import github.com/blang/semver
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v1, err := semver.Make("1.0.0-beta")
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v2, err := semver.Make("2.0.0-beta")
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v1.Compare(v2)
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```
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Also check the [GoDocs](http://godoc.org/github.com/blang/semver).
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Why should I use this lib?
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-----
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- Fully spec compatible
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- No reflection
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- No regex
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- Fully tested (Coverage >99%)
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- Readable parsing/validation errors
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- Fast (See [Benchmarks](#benchmarks))
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- Only Stdlib
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- Uses values instead of pointers
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- Many features, see below
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Features
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-----
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- Parsing and validation at all levels
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- Comparator-like comparisons
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- Compare Helper Methods
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- InPlace manipulation
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- Ranges `>=1.0.0 <2.0.0 || >=3.0.0 !3.0.1-beta.1`
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- Wildcards `>=1.x`, `<=2.5.x`
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- Sortable (implements sort.Interface)
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- database/sql compatible (sql.Scanner/Valuer)
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- encoding/json compatible (json.Marshaler/Unmarshaler)
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Ranges
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------
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A `Range` is a set of conditions which specify which versions satisfy the range.
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A condition is composed of an operator and a version. The supported operators are:
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- `<1.0.0` Less than `1.0.0`
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- `<=1.0.0` Less than or equal to `1.0.0`
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- `>1.0.0` Greater than `1.0.0`
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- `>=1.0.0` Greater than or equal to `1.0.0`
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- `1.0.0`, `=1.0.0`, `==1.0.0` Equal to `1.0.0`
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- `!1.0.0`, `!=1.0.0` Not equal to `1.0.0`. Excludes version `1.0.0`.
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Note that spaces between the operator and the version will be gracefully tolerated.
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A `Range` can link multiple `Ranges` separated by space:
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Ranges can be linked by logical AND:
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- `>1.0.0 <2.0.0` would match between both ranges, so `1.1.1` and `1.8.7` but not `1.0.0` or `2.0.0`
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- `>1.0.0 <3.0.0 !2.0.3-beta.2` would match every version between `1.0.0` and `3.0.0` except `2.0.3-beta.2`
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Ranges can also be linked by logical OR:
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- `<2.0.0 || >=3.0.0` would match `1.x.x` and `3.x.x` but not `2.x.x`
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AND has a higher precedence than OR. It's not possible to use brackets.
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Ranges can be combined by both AND and OR
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- `>1.0.0 <2.0.0 || >3.0.0 !4.2.1` would match `1.2.3`, `1.9.9`, `3.1.1`, but not `4.2.1`, `2.1.1`
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Range usage:
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```
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v, err := semver.Parse("1.2.3")
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range, err := semver.ParseRange(">1.0.0 <2.0.0 || >=3.0.0")
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if range(v) {
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//valid
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}
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```
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Example
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-----
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Have a look at full examples in [examples/main.go](examples/main.go)
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```go
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import github.com/blang/semver
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v, err := semver.Make("0.0.1-alpha.preview+123.github")
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fmt.Printf("Major: %d\n", v.Major)
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fmt.Printf("Minor: %d\n", v.Minor)
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fmt.Printf("Patch: %d\n", v.Patch)
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fmt.Printf("Pre: %s\n", v.Pre)
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fmt.Printf("Build: %s\n", v.Build)
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// Prerelease versions array
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if len(v.Pre) > 0 {
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fmt.Println("Prerelease versions:")
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for i, pre := range v.Pre {
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fmt.Printf("%d: %q\n", i, pre)
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}
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}
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// Build meta data array
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if len(v.Build) > 0 {
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fmt.Println("Build meta data:")
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for i, build := range v.Build {
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fmt.Printf("%d: %q\n", i, build)
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}
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}
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v001, err := semver.Make("0.0.1")
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// Compare using helpers: v.GT(v2), v.LT, v.GTE, v.LTE
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v001.GT(v) == true
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v.LT(v001) == true
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v.GTE(v) == true
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v.LTE(v) == true
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// Or use v.Compare(v2) for comparisons (-1, 0, 1):
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v001.Compare(v) == 1
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v.Compare(v001) == -1
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v.Compare(v) == 0
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// Manipulate Version in place:
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v.Pre[0], err = semver.NewPRVersion("beta")
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if err != nil {
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fmt.Printf("Error parsing pre release version: %q", err)
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}
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fmt.Println("\nValidate versions:")
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v.Build[0] = "?"
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err = v.Validate()
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if err != nil {
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fmt.Printf("Validation failed: %s\n", err)
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}
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```
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Benchmarks
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-----
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BenchmarkParseSimple-4 5000000 390 ns/op 48 B/op 1 allocs/op
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BenchmarkParseComplex-4 1000000 1813 ns/op 256 B/op 7 allocs/op
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BenchmarkParseAverage-4 1000000 1171 ns/op 163 B/op 4 allocs/op
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BenchmarkStringSimple-4 20000000 119 ns/op 16 B/op 1 allocs/op
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BenchmarkStringLarger-4 10000000 206 ns/op 32 B/op 2 allocs/op
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BenchmarkStringComplex-4 5000000 324 ns/op 80 B/op 3 allocs/op
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BenchmarkStringAverage-4 5000000 273 ns/op 53 B/op 2 allocs/op
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BenchmarkValidateSimple-4 200000000 9.33 ns/op 0 B/op 0 allocs/op
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BenchmarkValidateComplex-4 3000000 469 ns/op 0 B/op 0 allocs/op
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BenchmarkValidateAverage-4 5000000 256 ns/op 0 B/op 0 allocs/op
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BenchmarkCompareSimple-4 100000000 11.8 ns/op 0 B/op 0 allocs/op
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BenchmarkCompareComplex-4 50000000 30.8 ns/op 0 B/op 0 allocs/op
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BenchmarkCompareAverage-4 30000000 41.5 ns/op 0 B/op 0 allocs/op
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BenchmarkSort-4 3000000 419 ns/op 256 B/op 2 allocs/op
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BenchmarkRangeParseSimple-4 2000000 850 ns/op 192 B/op 5 allocs/op
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BenchmarkRangeParseAverage-4 1000000 1677 ns/op 400 B/op 10 allocs/op
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BenchmarkRangeParseComplex-4 300000 5214 ns/op 1440 B/op 30 allocs/op
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BenchmarkRangeMatchSimple-4 50000000 25.6 ns/op 0 B/op 0 allocs/op
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BenchmarkRangeMatchAverage-4 30000000 56.4 ns/op 0 B/op 0 allocs/op
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BenchmarkRangeMatchComplex-4 10000000 153 ns/op 0 B/op 0 allocs/op
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See benchmark cases at [semver_test.go](semver_test.go)
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Motivation
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-----
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I simply couldn't find any lib supporting the full spec. Others were just wrong or used reflection and regex which i don't like.
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Contribution
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-----
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Feel free to make a pull request. For bigger changes create a issue first to discuss about it.
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License
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-----
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See [LICENSE](LICENSE) file.
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