github.com/matthewbelisle-wf/godep@v0.0.0-20140716191328-dba190f14fc8/get.go (about) 1 package main 2 3 import ( 4 "log" 5 "os" 6 "os/exec" 7 ) 8 9 var cmdGet = &Command{ 10 Usage: "get [packages]", 11 Short: "download and install packages with specified dependencies", 12 Long: ` 13 Get downloads to GOPATH the packages named by the import paths, and installs 14 them with the dependencies specified in their Godeps files. 15 16 If any of the packages do not have Godeps files, those are installed 17 as if by go get. 18 19 For more about specifying packages, see 'go help packages'. 20 `, 21 Run: runGet, 22 } 23 24 func runGet(cmd *Command, args []string) { 25 if len(args) == 0 { 26 args = []string{"."} 27 } 28 29 err := command("go", "get", "-d", args).Run() 30 if err != nil { 31 log.Fatalln(err) 32 } 33 34 // group import paths by Godeps location 35 groups := make(map[string][]string) 36 ps, err := LoadPackages(args...) 37 if err != nil { 38 log.Fatalln(err) 39 } 40 for _, pkg := range ps { 41 if pkg.Error.Err != "" { 42 log.Fatalln(pkg.Error.Err) 43 } 44 dir, _ := findInParents(pkg.Dir, "Godeps") 45 groups[dir] = append(groups[dir], pkg.ImportPath) 46 } 47 for dir, packages := range groups { 48 var c *exec.Cmd 49 if dir == "" { 50 c = command("go", "install", packages) 51 } else { 52 c = command("godep", "go", "install", packages) 53 c.Dir = dir 54 } 55 if err := c.Run(); err != nil { 56 log.Fatalln(err) 57 } 58 } 59 } 60 61 // command is like exec.Command, but the returned 62 // Cmd inherits stderr from the current process, and 63 // elements of args may be either string or []string. 64 func command(name string, args ...interface{}) *exec.Cmd { 65 var a []string 66 for _, arg := range args { 67 switch v := arg.(type) { 68 case string: 69 a = append(a, v) 70 case []string: 71 a = append(a, v...) 72 } 73 } 74 c := exec.Command(name, a...) 75 c.Stderr = os.Stderr 76 return c 77 }