From 68a936a52eda992218ae03a95f39db7ff93f634b Mon Sep 17 00:00:00 2001
From: montag451 <montag451@laposte.net>
Date: Sun, 1 Dec 2024 21:20:20 +0100
Subject: [PATCH] incus: Improve completion for `file push` and `file pull`

Signed-off-by: montag451 <montag451@laposte.net>
---
 cmd/incus/completion.go | 83 +++++++++++++++++++++++++++++++++++++++++
 cmd/incus/file.go       | 18 +++++++++
 2 files changed, 101 insertions(+)

diff --git a/cmd/incus/completion.go b/cmd/incus/completion.go
index 31814df102c..52f2b666848 100644
--- a/cmd/incus/completion.go
+++ b/cmd/incus/completion.go
@@ -2,6 +2,9 @@ package main
 
 import (
 	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
 	"regexp"
 	"strings"
 
@@ -1222,3 +1225,83 @@ func (g *cmdGlobal) cmpStoragePoolVolumes(poolName string) ([]string, cobra.Shel
 
 	return volumes, cobra.ShellCompDirectiveNoFileComp
 }
+
+func isSymlinkToDir(path string, d fs.DirEntry) bool {
+	if d.Type()&fs.ModeSymlink == 0 {
+		return false
+	}
+
+	info, err := os.Stat(path)
+	if err != nil || !info.IsDir() {
+		return false
+	}
+
+	return true
+}
+
+func (g *cmdGlobal) cmpFiles(toComplete string, includeLocalFiles bool) ([]string, cobra.ShellCompDirective) {
+	instances, directives := g.cmpInstances(toComplete)
+	for i := range instances {
+		if strings.HasSuffix(instances[i], ":") {
+			continue
+		}
+
+		instances[i] += "/"
+	}
+
+	if len(instances) > 0 {
+		directives |= cobra.ShellCompDirectiveNoSpace
+	}
+
+	if !includeLocalFiles {
+		return instances, directives
+	}
+
+	var files []string
+	sep := string(filepath.Separator)
+	dir, prefix := filepath.Split(toComplete)
+	switch prefix {
+	case ".":
+		files = append(files, dir+"."+sep)
+		fallthrough
+	case "..":
+		files = append(files, dir+".."+sep)
+		directives |= cobra.ShellCompDirectiveNoSpace
+	}
+
+	root, err := filepath.EvalSymlinks(filepath.Dir(dir))
+	if err != nil {
+		return append(instances, files...), directives
+	}
+
+	_ = filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
+		if err != nil || path == root {
+			return err
+		}
+
+		base := filepath.Base(path)
+		if strings.HasPrefix(base, prefix) {
+			file := dir + base
+			switch {
+			case d.IsDir():
+				directives |= cobra.ShellCompDirectiveNoSpace
+				file += sep
+			case isSymlinkToDir(path, d):
+				directives |= cobra.ShellCompDirectiveNoSpace
+				if base == prefix {
+					file += sep
+				}
+			}
+
+			files = append(files, file)
+		}
+
+		if d.IsDir() {
+			return fs.SkipDir
+		}
+
+		return nil
+	})
+
+	return append(instances, files...), directives
+}
diff --git a/cmd/incus/file.go b/cmd/incus/file.go
index e9424d186c4..1d623c8c3f9 100644
--- a/cmd/incus/file.go
+++ b/cmd/incus/file.go
@@ -475,8 +475,17 @@ func (c *cmdFilePull) Command() *cobra.Command {
 
 	cmd.Flags().BoolVarP(&c.file.flagMkdir, "create-dirs", "p", false, i18n.G("Create any directories necessary"))
 	cmd.Flags().BoolVarP(&c.file.flagRecursive, "recursive", "r", false, i18n.G("Recursively transfer files"))
+
 	cmd.RunE = c.Run
 
+	cmd.ValidArgsFunction = func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		if len(args) == 0 {
+			return c.global.cmpFiles(toComplete, false)
+		}
+
+		return c.global.cmpFiles(toComplete, true)
+	}
+
 	return cmd
 }
 
@@ -697,8 +706,17 @@ func (c *cmdFilePush) Command() *cobra.Command {
 	cmd.Flags().IntVar(&c.file.flagUID, "uid", -1, i18n.G("Set the file's uid on push")+"``")
 	cmd.Flags().IntVar(&c.file.flagGID, "gid", -1, i18n.G("Set the file's gid on push")+"``")
 	cmd.Flags().StringVar(&c.file.flagMode, "mode", "", i18n.G("Set the file's perms on push")+"``")
+
 	cmd.RunE = c.Run
 
+	cmd.ValidArgsFunction = func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+		if len(args) == 0 {
+			return nil, cobra.ShellCompDirectiveDefault
+		}
+
+		return c.global.cmpFiles(toComplete, true)
+	}
+
 	return cmd
 }