1package main
2
3import (
4	"fmt"
5	"github.com/blang/semver"
6)
7
8func main() {
9	v, err := semver.Parse("0.0.1-alpha.preview.222+123.github")
10	if err != nil {
11		fmt.Printf("Error while parsing (not valid): %q", err)
12	}
13	fmt.Printf("Version to string: %q\n", v)
14
15	fmt.Printf("Major: %d\n", v.Major)
16	fmt.Printf("Minor: %d\n", v.Minor)
17	fmt.Printf("Patch: %d\n", v.Patch)
18
19	// Prerelease versions
20	if len(v.Pre) > 0 {
21		fmt.Println("Prerelease versions:")
22		for i, pre := range v.Pre {
23			fmt.Printf("%d: %q\n", i, pre)
24		}
25	}
26
27	// Build meta data
28	if len(v.Build) > 0 {
29		fmt.Println("Build meta data:")
30		for i, build := range v.Build {
31			fmt.Printf("%d: %q\n", i, build)
32		}
33	}
34
35	// Make == Parse (Value), New for Pointer
36	v001, err := semver.Make("0.0.1")
37
38	fmt.Println("\nUse Version.Compare for comparisons (-1, 0, 1):")
39	fmt.Printf("%q is greater than %q: Compare == %d\n", v001, v, v001.Compare(v))
40	fmt.Printf("%q is less than %q: Compare == %d\n", v, v001, v.Compare(v001))
41	fmt.Printf("%q is equal to %q: Compare == %d\n", v, v, v.Compare(v))
42
43	fmt.Println("\nUse comparison helpers returning booleans:")
44	fmt.Printf("%q is greater than %q: %t\n", v001, v, v001.GT(v))
45	fmt.Printf("%q is greater than equal %q: %t\n", v001, v, v001.GTE(v))
46	fmt.Printf("%q is greater than equal %q: %t\n", v, v, v.GTE(v))
47	fmt.Printf("%q is less than %q: %t\n", v, v001, v.LT(v001))
48	fmt.Printf("%q is less than equal %q: %t\n", v, v001, v.LTE(v001))
49	fmt.Printf("%q is less than equal %q: %t\n", v, v, v.LTE(v))
50
51	fmt.Println("\nManipulate Version in place:")
52	v.Pre[0], err = semver.NewPRVersion("beta")
53	if err != nil {
54		fmt.Printf("Error parsing pre release version: %q", err)
55	}
56	fmt.Printf("Version to string: %q\n", v)
57
58	fmt.Println("\nCompare Prerelease versions:")
59	pre1, _ := semver.NewPRVersion("123")
60	pre2, _ := semver.NewPRVersion("alpha")
61	pre3, _ := semver.NewPRVersion("124")
62	fmt.Printf("%q is less than %q: Compare == %d\n", pre1, pre2, pre1.Compare(pre2))
63	fmt.Printf("%q is greater than %q: Compare == %d\n", pre3, pre1, pre3.Compare(pre1))
64	fmt.Printf("%q is equal to %q: Compare == %d\n", pre1, pre1, pre1.Compare(pre1))
65
66	fmt.Println("\nValidate versions:")
67	v.Build[0] = "?"
68
69	err = v.Validate()
70	if err != nil {
71		fmt.Printf("Validation failed: %s\n", err)
72	}
73
74	fmt.Println("Create valid build meta data:")
75	b1, _ := semver.NewBuildVersion("build123")
76	v.Build[0] = b1
77	fmt.Printf("Version with new build version %q\n", v)
78
79	_, err = semver.NewBuildVersion("build?123")
80	if err != nil {
81		fmt.Printf("Create build version failed: %s\n", err)
82	}
83}
84