server(filesystem): fix archiver path matching

Closes https://github.com/pterodactyl/panel/issues/4630

server/filesystem/archive_test.go

@@ -0,0 +1,125 @@
+package filesystem
+
+import (
+	"context"
+	iofs "io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	. "github.com/franela/goblin"
+	"github.com/mholt/archiver/v4"
+)
+
+func TestArchive_Stream(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("Archive", func() {
+		g.AfterEach(func() {
+			// Reset the filesystem after each run.
+			rfs.reset()
+		})
+
+		g.It("throws an error when passed invalid file paths", func() {
+			a := &Archive{
+				BasePath: fs.Path(),
+				Files: []string{
+					// To use the archiver properly, this needs to be filepath.Join(BasePath, "yeet")
+					// However, this test tests that we actually validate that behavior.
+					"yeet",
+				},
+			}
+
+			g.Assert(a.Create(context.Background(), "")).IsNotNil()
+		})
+
+		g.It("creates archive with intended files", func() {
+			g.Assert(fs.CreateDirectory("test", "/")).IsNil()
+			g.Assert(fs.CreateDirectory("test2", "/")).IsNil()
+
+			err := fs.Writefile("test/file.txt", strings.NewReader("hello, world!\n"))
+			g.Assert(err).IsNil()
+
+			err = fs.Writefile("test2/file.txt", strings.NewReader("hello, world!\n"))
+			g.Assert(err).IsNil()
+
+			err = fs.Writefile("test_file.txt", strings.NewReader("hello, world!\n"))
+			g.Assert(err).IsNil()
+
+			err = fs.Writefile("test_file.txt.old", strings.NewReader("hello, world!\n"))
+			g.Assert(err).IsNil()
+
+			a := &Archive{
+				BasePath: fs.Path(),
+				Files: []string{
+					filepath.Join(fs.Path(), "test"),
+					filepath.Join(fs.Path(), "test_file.txt"),
+				},
+			}
+
+			// Create the archive
+			archivePath := filepath.Join(rfs.root, "archive.tar.gz")
+			g.Assert(a.Create(context.Background(), archivePath)).IsNil()
+
+			// Ensure the archive exists.
+			_, err = os.Stat(archivePath)
+			g.Assert(err).IsNil()
+
+			// Open the archive.
+			genericFs, err := archiver.FileSystem(archivePath)
+			g.Assert(err).IsNil()
+
+			// Assert that we are opening an archive.
+			afs, ok := genericFs.(archiver.ArchiveFS)
+			g.Assert(ok).IsTrue()
+
+			// Get the names of the files recursively from the archive.
+			files, err := getFiles(afs, ".")
+			g.Assert(err).IsNil()
+
+			// Ensure the files in the archive match what we are expecting.
+			g.Assert(files).Equal([]string{
+				"test_file.txt",
+				"test/file.txt",
+			})
+		})
+	})
+}
+
+func getFiles(f iofs.ReadDirFS, name string) ([]string, error) {
+	var v []string
+
+	entries, err := f.ReadDir(name)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, e := range entries {
+		entryName := e.Name()
+		if name != "." {
+			entryName = filepath.Join(name, entryName)
+		}
+
+		if e.IsDir() {
+			files, err := getFiles(f, entryName)
+			if err != nil {
+				return nil, err
+			}
+
+			if files == nil {
+				return nil, nil
+			}
+
+			for _, f := range files {
+				v = append(v, f)
+			}
+			continue
+		}
+
+		v = append(v, entryName)
+	}
+
+	return v, nil
+}