5 changed files with 318 additions and 15 deletions
@ -0,0 +1,205 @@ |
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package manager |
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import ( |
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"fmt" |
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"io/ioutil" |
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"os/exec" |
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"path/filepath" |
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"strings" |
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) |
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// Runnable defines a command to run, along with its arguments,
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// and whether or not failing to exit successfully matters.
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// It also defines whether certains words must exist (or not exist)
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// in its output, apart from existing successfully, to determine
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// whether or not it was actually successful.
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type Runnable struct { |
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Exec string |
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Args []string |
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Must bool |
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Keywords []string |
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Badwords []string |
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} |
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func (x Runnable) Run() error { |
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cmd := exec.Command(x.Exec, x.Args...) |
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out, err := cmd.CombinedOutput() |
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if !x.Must { |
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return nil |
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} |
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good := true |
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str := string(out) |
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for j := range x.Keywords { |
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if !strings.Contains(str, x.Keywords[j]) { |
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good = false |
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break |
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} |
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} |
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if good && 0 != len(x.Badwords) { |
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for j := range x.Badwords { |
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if "" != x.Badwords[j] && !strings.Contains(str, x.Badwords[j]) { |
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good = false |
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break |
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} |
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} |
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} |
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if nil != err { |
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return fmt.Errorf("Failed to run %s %s\n%s\n", x.Exec, strings.Join(x.Args, " "), str) |
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} |
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return nil |
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} |
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func (x Runnable) String() string { |
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var comment string |
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var must = "true" |
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if x.Must { |
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must = "exit" |
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if len(x.Keywords) > 0 { |
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comment += "# output must match all of:\n" |
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comment += "\t" + strings.Join(x.Keywords, "#\t \n") + "\n" |
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} |
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if len(x.Badwords) > 0 { |
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comment += "# output must not match any of:\n" |
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comment += "\t" + strings.Join(x.Keywords, "#\t \n") + "\n" |
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} |
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} |
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return strings.TrimSpace(fmt.Sprintf( |
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"%s %s || %s\n%s", |
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x.Exec, |
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strings.Join(x.Args, " "), |
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must, |
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comment, |
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)) |
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} |
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func getSrvs(dir string) ([]string, error) { |
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plists := []string{} |
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infos, err := ioutil.ReadDir(dir) |
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if nil != err { |
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return nil, err |
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} |
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for i := range infos { |
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x := infos[i] |
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fname := strings.ToLower(x.Name()) |
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if strings.HasSuffix(fname, srvExt) { |
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plists = append(plists, x.Name()) |
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} |
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} |
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return plists, nil |
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} |
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func getSystemSrvs() ([]string, error) { |
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return getSrvs(srvSysPath) |
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} |
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func getUserSrvs(home string) ([]string, error) { |
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dir := filepath.Join(home, srvUserPath) |
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return getSrvs(dir) |
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} |
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func filterMatchingSrvs(plists []string, name string) []string { |
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filtered := []string{} |
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for i := range plists { |
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pname := plists[i] |
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lname := strings.ToLower(pname) |
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n := len(lname) |
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if strings.HasSuffix(lname[:n-srvLen], strings.ToLower(name)) { |
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filtered = append(filtered, pname) |
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} |
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} |
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return filtered |
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} |
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func getMatchingSrvs(home string, name string) ([]string, []string, error) { |
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sysPlists, err := getSystemSrvs() |
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if nil != err { |
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return nil, nil, err |
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} |
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var userPlists []string |
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if "" != home { |
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userPlists, err = getUserSrvs(home) |
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if nil != err { |
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return nil, nil, err |
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} |
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} |
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return filterMatchingSrvs(sysPlists, name), filterMatchingSrvs(userPlists, name), nil |
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} |
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func getExactSrvMatch(srvs []string, name string) string { |
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for i := range srvs { |
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srv := srvs[i] |
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n := len(srv) |
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if srv[:n-srvLen] == strings.ToLower(name) { |
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return srv |
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} |
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} |
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return "" |
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} |
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func getOneSysSrv(sys []string, user []string, name string) (string, error) { |
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service := getExactSrvMatch(user, name) |
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if "" != service { |
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return service, nil |
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} |
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var errstr string |
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// system service was wanted
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n := len(sys) |
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switch { |
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case 0 == n: |
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errstr += fmt.Sprintf("Didn't find user service matching %q\n", name) |
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if 0 != len(user) { |
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errstr += fmt.Sprintf("Did you intend to run a user service instead?\n\t%s\n", strings.Join(user, "\n\t")) |
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} |
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case n > 1: |
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errstr += fmt.Sprintf("Found more than one matching service:\n\t%s\n", strings.Join(sys, "\n\t")) |
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default: |
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service = filepath.Join(srvSysPath, sys[0]) |
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} |
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if "" != errstr { |
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return "", fmt.Errorf(errstr) |
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} |
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return service, nil |
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} |
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func getOneUserSrv(home string, sys []string, user []string, name string) (string, error) { |
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service := getExactSrvMatch(user, name) |
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if "" != service { |
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return service, nil |
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} |
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var errstr string |
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// user service was wanted
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n := len(user) |
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switch { |
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case 0 == n: |
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errstr += fmt.Sprintf("Didn't find user service matching %q\n", name) |
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if 0 != len(sys) { |
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errstr += fmt.Sprintf("Did you intend to run a system service instead?\n\t%s\n", strings.Join(sys, "\n\t")) |
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} |
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case n > 1: |
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errstr += fmt.Sprintf("Found more than one matching service:\n\t%s\n", strings.Join(user, "\n\t")) |
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default: |
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service = filepath.Join(home, srvUserPath, user[0]+srvExt) |
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} |
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if "" != errstr { |
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return "", fmt.Errorf(errstr) |
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} |
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return service, nil |
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} |
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