1package main
2
3import (
4	"fmt"
5
6	"github.com/blang/semver"
7)
8
9func main() {
10	v, err := semver.Parse("0.0.1-alpha.preview.222+123.github")
11	if err != nil {
12		fmt.Printf("Error while parsing (not valid): %q", err)
13	}
14	fmt.Printf("Version to string: %q\n", v)
15
16	fmt.Printf("Major: %d\n", v.Major)
17	fmt.Printf("Minor: %d\n", v.Minor)
18	fmt.Printf("Patch: %d\n", v.Patch)
19
20	// Prerelease versions
21	if len(v.Pre) > 0 {
22		fmt.Println("Prerelease versions:")
23		for i, pre := range v.Pre {
24			fmt.Printf("%d: %q\n", i, pre)
25		}
26	}
27
28	// Build meta data
29	if len(v.Build) > 0 {
30		fmt.Println("Build meta data:")
31		for i, build := range v.Build {
32			fmt.Printf("%d: %q\n", i, build)
33		}
34	}
35
36	// Make == Parse (Value), New for Pointer
37	v001, _ := semver.Make("0.0.1")
38
39	fmt.Println("\nUse Version.Compare for comparisons (-1, 0, 1):")
40	fmt.Printf("%q is greater than %q: Compare == %d\n", v001, v, v001.Compare(v))
41	fmt.Printf("%q is less than %q: Compare == %d\n", v, v001, v.Compare(v001))
42	fmt.Printf("%q is equal to %q: Compare == %d\n", v, v, v.Compare(v))
43
44	fmt.Println("\nUse comparison helpers returning booleans:")
45	fmt.Printf("%q is greater than %q: %t\n", v001, v, v001.GT(v))
46	fmt.Printf("%q is greater than equal %q: %t\n", v001, v, v001.GTE(v))
47	fmt.Printf("%q is greater than equal %q: %t\n", v, v, v.GTE(v))
48	fmt.Printf("%q is less than %q: %t\n", v, v001, v.LT(v001))
49	fmt.Printf("%q is less than equal %q: %t\n", v, v001, v.LTE(v001))
50	fmt.Printf("%q is less than equal %q: %t\n", v, v, v.LTE(v))
51
52	fmt.Println("\nManipulate Version in place:")
53	v.Pre[0], err = semver.NewPRVersion("beta")
54	if err != nil {
55		fmt.Printf("Error parsing pre release version: %q", err)
56	}
57	fmt.Printf("Version to string: %q\n", v)
58
59	fmt.Println("\nCompare Prerelease versions:")
60	pre1, _ := semver.NewPRVersion("123")
61	pre2, _ := semver.NewPRVersion("alpha")
62	pre3, _ := semver.NewPRVersion("124")
63	fmt.Printf("%q is less than %q: Compare == %d\n", pre1, pre2, pre1.Compare(pre2))
64	fmt.Printf("%q is greater than %q: Compare == %d\n", pre3, pre1, pre3.Compare(pre1))
65	fmt.Printf("%q is equal to %q: Compare == %d\n", pre1, pre1, pre1.Compare(pre1))
66
67	fmt.Println("\nValidate versions:")
68	v.Build[0] = "?"
69
70	err = v.Validate()
71	if err != nil {
72		fmt.Printf("Validation failed: %s\n", err)
73	}
74
75	fmt.Println("Create valid build meta data:")
76	b1, _ := semver.NewBuildVersion("build123")
77	v.Build[0] = b1
78	fmt.Printf("Version with new build version %q\n", v)
79
80	_, err = semver.NewBuildVersion("build?123")
81	if err != nil {
82		fmt.Printf("Create build version failed: %s\n", err)
83	}
84}
85