feat(*): Add autocomplete feature (#41)

Author: git-pi-e

README.md

@@ -113,3 +113,27 @@ Version command prints the version of pb and the Parseable Server it is configur
 ```bash
 pb version
 ```
+
+### Add Autocomplete
+
+To enable autocomplete for pb, run the following command according to your shell:
+
+For bash:
+```bash
+pb autocomplete bash > /etc/bash_completion.d/pb
+source /etc/bash_completion.d/pb
+```
+
+For zsh:
+```zsh
+pb autocomplete zsh > /usr/local/share/zsh/site-functions/_pb
+autoload -U compinit && compinit
+```
+
+For powershell
+```powershell
+pb autocomplete powershell > $env:USERPROFILE\Documents\PowerShell\pb_complete.ps1
+. $PROFILE
+```
+
+

cmd/autocomplete.go

@@ -0,0 +1,52 @@
+
+// Copyright (c) 2024 Parseable, Inc
+//
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package cmd
+
+import (
+    "fmt"
+    "os"
+
+    "github.com/spf13/cobra"
+)
+
+// AutocompleteCmd represents the autocomplete command
+var AutocompleteCmd = &cobra.Command{
+    Use:   "autocomplete [bash|zsh|powershell]",
+    Short: "Generate autocomplete script",
+    Long:  `Generate autocomplete script for bash, zsh, or powershell`,
+    Args:  cobra.ExactArgs(1),
+    RunE: func(cmd *cobra.Command, args []string) error {
+        var err error
+        switch args[0] {
+        case "bash":
+            err = cmd.Root().GenBashCompletion(os.Stdout)
+        case "zsh":
+            err = cmd.Root().GenZshCompletion(os.Stdout)
+        case "powershell":
+            err = cmd.Root().GenPowerShellCompletionWithDesc(os.Stdout)
+        default:
+            err = fmt.Errorf("unsupported shell type: %s. Only bash, zsh, and powershell are supported", args[0])
+        }
+
+        if err != nil {
+            return fmt.Errorf("error generating autocomplete script: %w", err)
+        }
+
+        return nil
+    },
+}

main.go

@@ -112,6 +112,8 @@ func main() {
 	cli.AddCommand(role)
 	cli.AddCommand(cmd.TailCmd)
 
+	cli.AddCommand(cmd.AutocompleteCmd)
+
 	// Set as command
 	cmd.VersionCmd.Run = func(_ *cobra.Command, _ []string) {
 		cmd.PrintVersion(Version, Commit)