2 files changed, 207 insertions, 0 deletions
diff --git a/modules/packages/vagrant/metadata.go b/modules/packages/vagrant/metadata.go
new file mode 100644
index 0000000..6789533
--- /dev/null
+++ b/modules/packages/vagrant/metadata.go
@@ -0,0 +1,96 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package vagrant
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"io"
+	"strings"
+
+	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/validation"
+)
+
+const (
+	PropertyProvider = "vagrant.provider"
+)
+
+// Metadata represents the metadata of a Vagrant package
+type Metadata struct {
+	Author        string `json:"author,omitempty"`
+	Description   string `json:"description,omitempty"`
+	ProjectURL    string `json:"project_url,omitempty"`
+	RepositoryURL string `json:"repository_url,omitempty"`
+}
+
+// ParseMetadataFromBox parses the metadata of a box file
+func ParseMetadataFromBox(r io.Reader) (*Metadata, error) {
+	gzr, err := gzip.NewReader(r)
+	if err != nil {
+		return nil, err
+	}
+	defer gzr.Close()
+
+	tr := tar.NewReader(gzr)
+	for {
+		hd, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil, err
+		}
+
+		if hd.Typeflag != tar.TypeReg {
+			continue
+		}
+
+		if hd.Name == "info.json" {
+			return ParseInfoFile(tr)
+		}
+	}
+
+	return &Metadata{}, nil
+}
+
+// ParseInfoFile parses a info.json file to retrieve the metadata of a Vagrant package
+func ParseInfoFile(r io.Reader) (*Metadata, error) {
+	var values map[string]string
+	if err := json.NewDecoder(r).Decode(&values); err != nil {
+		return nil, err
+	}
+
+	m := &Metadata{}
+
+	// There is no defined format for this file, just try the common keys
+	for k, v := range values {
+		switch strings.ToLower(k) {
+		case "description":
+			fallthrough
+		case "short_description":
+			m.Description = v
+		case "website":
+			fallthrough
+		case "homepage":
+			fallthrough
+		case "url":
+			if validation.IsValidURL(v) {
+				m.ProjectURL = v
+			}
+		case "repository":
+			fallthrough
+		case "source":
+			if validation.IsValidURL(v) {
+				m.RepositoryURL = v
+			}
+		case "author":
+			fallthrough
+		case "authors":
+			m.Author = v
+		}
+	}
+
+	return m, nil
+}
diff --git a/modules/packages/vagrant/metadata_test.go b/modules/packages/vagrant/metadata_test.go
new file mode 100644
index 0000000..f467781
--- /dev/null
+++ b/modules/packages/vagrant/metadata_test.go
@@ -0,0 +1,111 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package vagrant
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"io"
+	"testing"
+
+	"code.gitea.io/gitea/modules/json"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	author        = "gitea"
+	description   = "Package Description"
+	projectURL    = "https://gitea.io"
+	repositoryURL = "https://gitea.io/gitea/gitea"
+)
+
+func TestParseMetadataFromBox(t *testing.T) {
+	createArchive := func(files map[string][]byte) io.Reader {
+		var buf bytes.Buffer
+		zw := gzip.NewWriter(&buf)
+		tw := tar.NewWriter(zw)
+		for filename, content := range files {
+			hdr := &tar.Header{
+				Name: filename,
+				Mode: 0o600,
+				Size: int64(len(content)),
+			}
+			tw.WriteHeader(hdr)
+			tw.Write(content)
+		}
+		tw.Close()
+		zw.Close()
+		return &buf
+	}
+
+	t.Run("MissingInfoFile", func(t *testing.T) {
+		data := createArchive(map[string][]byte{"dummy.txt": {}})
+
+		metadata, err := ParseMetadataFromBox(data)
+		assert.NotNil(t, metadata)
+		require.NoError(t, err)
+	})
+
+	t.Run("Valid", func(t *testing.T) {
+		content, err := json.Marshal(map[string]string{
+			"description": description,
+			"author":      author,
+			"website":     projectURL,
+			"repository":  repositoryURL,
+		})
+		require.NoError(t, err)
+
+		data := createArchive(map[string][]byte{"info.json": content})
+
+		metadata, err := ParseMetadataFromBox(data)
+		assert.NotNil(t, metadata)
+		require.NoError(t, err)
+
+		assert.Equal(t, author, metadata.Author)
+		assert.Equal(t, description, metadata.Description)
+		assert.Equal(t, projectURL, metadata.ProjectURL)
+		assert.Equal(t, repositoryURL, metadata.RepositoryURL)
+	})
+}
+
+func TestParseInfoFile(t *testing.T) {
+	t.Run("UnknownKeys", func(t *testing.T) {
+		content, err := json.Marshal(map[string]string{
+			"package": "",
+			"dummy":   "",
+		})
+		require.NoError(t, err)
+
+		metadata, err := ParseInfoFile(bytes.NewReader(content))
+		assert.NotNil(t, metadata)
+		require.NoError(t, err)
+
+		assert.Empty(t, metadata.Author)
+		assert.Empty(t, metadata.Description)
+		assert.Empty(t, metadata.ProjectURL)
+		assert.Empty(t, metadata.RepositoryURL)
+	})
+
+	t.Run("Valid", func(t *testing.T) {
+		content, err := json.Marshal(map[string]string{
+			"description": description,
+			"author":      author,
+			"website":     projectURL,
+			"repository":  repositoryURL,
+		})
+		require.NoError(t, err)
+
+		metadata, err := ParseInfoFile(bytes.NewReader(content))
+		assert.NotNil(t, metadata)
+		require.NoError(t, err)
+
+		assert.Equal(t, author, metadata.Author)
+		assert.Equal(t, description, metadata.Description)
+		assert.Equal(t, projectURL, metadata.ProjectURL)
+		assert.Equal(t, repositoryURL, metadata.RepositoryURL)
+	})
+}