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Auto guess binary file name
This commit is contained in:
parent
43d42c2242
commit
bc704df503
81
generate.go
81
generate.go
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@ -1,6 +1,7 @@
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package main
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"log"
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@ -42,9 +43,55 @@ func nixPath(name string) (path string, err error) {
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return
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}
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func generate(l *libvirt.Libvirt, name, bin, vmname string) {
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func guessChannel() (channel string, err error) {
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command := exec.Command("nix-channel", "--list")
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bytes, err := command.Output()
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if err != nil {
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return
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}
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channels := strings.Split(string(bytes), "\n")
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for _, line := range channels {
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fields := strings.Fields(line)
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if len(fields) == 2 {
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channel = fields[0]
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return
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}
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}
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err = errors.New("No channel found")
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return
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}
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func filterDotfiles(files []os.FileInfo) (notHiddenFiles []os.FileInfo) {
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for _, f := range files {
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if !strings.HasPrefix(f.Name(), ".") {
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notHiddenFiles = append(notHiddenFiles, f)
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}
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}
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return
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}
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func generate(l *libvirt.Libvirt, pkg, bin, vmname string) {
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var name string
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if strings.Contains(pkg, ".") {
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name = pkg
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} else {
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log.Println("Package name does not contains channel")
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log.Println("Trying to guess")
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channel, err := guessChannel()
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if err != nil {
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log.Println("Cannot guess channel")
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log.Println("Check nix-channel --list")
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return
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}
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name = channel + "." + pkg
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log.Println("Use", name)
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}
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if !isPackageExists(name) {
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log.Println("Package pkgs."+name, "does not exists")
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log.Println("Package", name, "does not exists")
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return
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}
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@ -63,13 +110,37 @@ func generate(l *libvirt.Libvirt, name, bin, vmname string) {
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}
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if bin == "" && len(files) != 1 {
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fmt.Println("There's more than one binary in */bin, " +
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"you should specify one of them explicitly")
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fmt.Println("There's more than one binary in */bin")
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fmt.Println("Files in", path+"/bin/:")
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for _, f := range files {
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fmt.Println("\t", f.Name())
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}
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return
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log.Println("Trying to guess binary")
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var found bool = false
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notHiddenFiles := filterDotfiles(files)
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if len(notHiddenFiles) == 1 {
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log.Println("Use", notHiddenFiles[0].Name())
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bin = notHiddenFiles[0].Name()
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found = true
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}
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if !found {
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for _, f := range files {
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if f.Name() == pkg {
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log.Println("Use", f.Name())
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bin = f.Name()
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found = true
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}
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}
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}
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if !found {
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log.Println("Cannot guess in */bin, " +
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"you should specify one of them explicitly")
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return
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}
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}
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if bin != "" {
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