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90 lines
1.6 KiB
90 lines
1.6 KiB
package utils
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import (
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"os"
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"path/filepath"
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"regexp"
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"runtime"
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"strconv"
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"strings"
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)
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// GetGOPATHs returns all paths in GOPATH variable.
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func GetGOPATHs() []string {
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gopath := os.Getenv("GOPATH")
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if gopath == "" && compareGoVersion(runtime.Version(), "go1.8") >= 0 {
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gopath = defaultGOPATH()
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}
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return filepath.SplitList(gopath)
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}
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func compareGoVersion(a, b string) int {
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reg := regexp.MustCompile("^\\d*")
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a = strings.TrimPrefix(a, "go")
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b = strings.TrimPrefix(b, "go")
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versionsA := strings.Split(a, ".")
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versionsB := strings.Split(b, ".")
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for i := 0; i < len(versionsA) && i < len(versionsB); i++ {
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versionA := versionsA[i]
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versionB := versionsB[i]
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vA, err := strconv.Atoi(versionA)
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if err != nil {
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str := reg.FindString(versionA)
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if str != "" {
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vA, _ = strconv.Atoi(str)
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} else {
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vA = -1
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}
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}
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vB, err := strconv.Atoi(versionB)
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if err != nil {
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str := reg.FindString(versionB)
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if str != "" {
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vB, _ = strconv.Atoi(str)
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} else {
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vB = -1
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}
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}
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if vA > vB {
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// vA = 12, vB = 8
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return 1
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} else if vA < vB {
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// vA = 6, vB = 8
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return -1
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} else if vA == -1 {
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// vA = rc1, vB = rc3
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return strings.Compare(versionA, versionB)
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}
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// vA = vB = 8
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continue
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}
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if len(versionsA) > len(versionsB) {
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return 1
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} else if len(versionsA) == len(versionsB) {
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return 0
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}
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return -1
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}
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func defaultGOPATH() string {
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env := "HOME"
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if runtime.GOOS == "windows" {
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env = "USERPROFILE"
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} else if runtime.GOOS == "plan9" {
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env = "home"
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}
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if home := os.Getenv(env); home != "" {
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return filepath.Join(home, "go")
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}
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return ""
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}
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