From ed2fa4ab891a946d114931fd1bb03d0736eec630 Mon Sep 17 00:00:00 2001 From: vilmibm Date: Mon, 8 Jun 2020 16:04:41 +0000 Subject: [PATCH] add stuff --- go.mod | 8 +++ go.sum | 128 ++++++++++++++++++++++++++++++++++++++++++++++ main.go | 154 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 290 insertions(+) create mode 100644 go.mod create mode 100644 go.sum create mode 100644 main.go diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..aed4553 --- /dev/null +++ b/go.mod @@ -0,0 +1,8 @@ +module git.tilde.town/tildetown/town-launcher + +go 1.14 + +require ( + github.com/spf13/cobra v1.0.0 + gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..687d9a1 --- /dev/null +++ b/go.sum @@ -0,0 +1,128 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= 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"github.com/spf13/cobra" + "gopkg.in/yaml.v3" +) + +const binroot = "/town/launcher" + +var rootCmd = &cobra.Command{ + Use: "town", + Short: "Run commands unique to tilde.town", +} + +var contribCmd = &cobra.Command{ + Use: "contrib", + Short: "community-maintained town commands", +} + +var adminCmd = &cobra.Command{ + Use: "admin", + Short: "commands used for administering the town", +} + +func isAdmin() (bool, error) { + u, err := user.Current() + if err != nil { + return false, fmt.Errorf("failed to get information about current user: %w", err) + } + + adminGroup, err := user.LookupGroup("admin") + if err != nil { + return false, fmt.Errorf("failed to get admin group info: %w", err) + } + + groupIds, err := u.GroupIds() + if err != nil { + return false, fmt.Errorf("failed to get groups info: %w", err) + } + + for _, groupId := range groupIds { + if groupId == adminGroup.Gid { + return true, nil + } + } + + return false, nil + +} + +func init() { + rootCmd.AddCommand(contribCmd) + + parseCommands(rootCmd, "core") + parseCommands(contribCmd, "contrib") + + admin, err := isAdmin() + if err != nil { + panic(fmt.Sprintf("failed to check admin status: %s", err)) + } + + if admin { + rootCmd.AddCommand(adminCmd) + parseCommands(adminCmd, "admin") + } + + // I feel like the example/documentation yaml can be frontmatter for non-binary files. to start + // i'll just do the accompanying yaml file. +} + +func parseCommands(targetCmd *cobra.Command, path string) { + binPath := filepath.Join(binroot, path) + files, err := ioutil.ReadDir(binPath) + if err != nil { + panic(fmt.Sprintf("failed to list directory %s: %s", binPath, err)) + } + + for _, file := range files { + if strings.HasSuffix(file.Name(), "yml") { + parseCommand(targetCmd, filepath.Join(binPath, file.Name())) + } + } +} + +type commandDoc struct { + ShortDesc string `yaml:"shortDesc"` + LongDesc string `yaml:"longDesc"` + Examples string +} + +func parseCommand(targetCmd *cobra.Command, yamlPath string) { + executablePath := strings.TrimSuffix(yamlPath, ".yml") + + // TODO handle when files lack executable bit + _, err := os.Stat(executablePath) + + if err != nil { + fmt.Fprintf(os.Stderr, "could not find matching executable for %s; skipping...", yamlPath) + return + } + + yamlBytes, err := ioutil.ReadFile(yamlPath) + if err != nil { + fmt.Fprintf(os.Stderr, "could not read %s; skipping...", yamlPath) + return + } + + doc := commandDoc{} + err = yaml.Unmarshal(yamlBytes, &doc) + if err != nil { + fmt.Fprintf(os.Stderr, "could not parse %s; skipping...", yamlPath) + return + } + + parsedCmd := &cobra.Command{ + Use: filepath.Base(executablePath), + RunE: execWrapper(executablePath), + } + if doc.ShortDesc != "" { + parsedCmd.Short = doc.ShortDesc + } + + if doc.LongDesc != "" { + parsedCmd.Long = doc.LongDesc + } + + if doc.Examples != "" { + parsedCmd.Example = doc.Examples + } + + targetCmd.AddCommand(parsedCmd) +} + +func execWrapper(executablePath string) func(*cobra.Command, []string) error { + return func(cmd *cobra.Command, args []string) error { + execCmd := exec.Command(executablePath, args...) + execCmd.Stderr = os.Stderr + execCmd.Stdout = os.Stdout + execCmd.Stdin = os.Stdin + return execCmd.Run() + } +} + +func main() { + rootCmd.Execute() +}