fix: existing repo setup doesn't ask for ssh key (#674)

* fix: existing repo setup doesn't ask for ssh key

* verify key

* improve error msg

Author: zreigz

pkg/up/context.go

@@ -2,13 +2,13 @@ package up
 
 import (
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 
 	"github.com/AlecAivazis/survey/v2"
 	"github.com/samber/lo"
 
-	"github.com/pluralsh/plural-cli/pkg/bundle"
 	"github.com/pluralsh/plural-cli/pkg/config"
 	"github.com/pluralsh/plural-cli/pkg/manifest"
 	"github.com/pluralsh/plural-cli/pkg/provider"
@@ -117,18 +117,15 @@ func backfillConsoleContext(man *manifest.ProjectManifest) error {
 	utils.Highlight("It looks like you cloned this repo before running plural up, we just need you to generate and give us a deploy key to continue\n")
 	utils.Highlight("If you want, you can use `plural crypto ssh-keygen` to generate a keypair to use as a deploy key as well\n\n")
 
+	files, err := filepath.Glob(filepath.Join(os.Getenv("HOME"), ".ssh", "*"))
+	if err != nil {
+		return err
+	}
+
 	var deployKey string
-	prompt := &survey.Input{
+	prompt := &survey.Select{
 		Message: "Select a file containing a read-only deploy key for this repo (use tab to list files in the directory):",
-		Default: "~/.ssh",
-		Suggest: func(toComplete string) []string {
-			path, err := homedir.Expand(toComplete)
-			if err != nil {
-				path = toComplete
-			}
-			files, _ := filepath.Glob(bundle.CleanPath(path) + "*")
-			return files
-		},
+		Options: files,
 	}
 
 	opts := []survey.AskOpt{survey.WithValidator(survey.Required)}
@@ -155,8 +152,30 @@ func backfillConsoleContext(man *manifest.ProjectManifest) error {
 		return fmt.Errorf("found non-ssh upstream url %s, please reclone the repo with SSH and retry", url)
 	}
 
+	if err := verifySSHKey(contents, url); err != nil {
+		return fmt.Errorf("ssh key not valid for url %s, error: %w", url, err)
+	}
+
 	console["repo_url"] = url
 	console["private_key"] = contents
 	ctx.Configuration["console"] = console
 	return ctx.Write(path)
 }
+
+func verifySSHKey(key, url string) error {
+	dir, err := os.MkdirTemp("", "repo")
+	if err != nil {
+		return err
+	}
+	defer func(path string) {
+		err := os.RemoveAll(path)
+		if err != nil {
+			return
+		}
+	}(dir)
+	auth, _ := git.SSHAuth("git", key, "")
+	if _, err := git.Clone(auth, url, dir); err != nil {
+		return err
+	}
+	return nil
+}