forked from shyiko/jabba
/
ls.go
56 lines (50 loc) · 1.09 KB
/
ls.go
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package command
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sort"
"strings"
"github.com/Jabba-Team/jabba/cfg"
"github.com/Jabba-Team/jabba/semver"
)
var readDir = ioutil.ReadDir
func Ls() ([]*semver.Version, error) {
files, _ := readDir(filepath.Join(cfg.Dir(), "jdk"))
var r []*semver.Version
for _, f := range files {
if f.IsDir() || (f.Mode()&os.ModeSymlink == os.ModeSymlink && strings.HasPrefix(f.Name(), "system@")) {
v, err := semver.ParseVersion(f.Name())
if err != nil {
return nil, err
}
r = append(r, v)
}
}
sort.Sort(sort.Reverse(semver.VersionSlice(r)))
return r, nil
}
func LsBestMatch(selector string) (ver string, err error) {
vs, err := Ls()
if err != nil {
return
}
return LsBestMatchWithVersionSlice(vs, selector)
}
func LsBestMatchWithVersionSlice(vs []*semver.Version, selector string) (ver string, err error) {
rng, err := semver.ParseRange(selector)
if err != nil {
return
}
for _, v := range vs {
if rng.Contains(v) {
ver = v.String()
break
}
}
if ver == "" {
err = fmt.Errorf("%s isn't installed", rng)
}
return
}