7 files changed, 652 insertions, 0 deletions
diff --git a/modules/packages/conan/conanfile_parser.go b/modules/packages/conan/conanfile_parser.go
new file mode 100644
index 0000000..c47b242
--- /dev/null
+++ b/modules/packages/conan/conanfile_parser.go
@@ -0,0 +1,67 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+import (
+	"io"
+	"regexp"
+	"strings"
+)
+
+var (
+	patternAuthor      = compilePattern("author")
+	patternHomepage    = compilePattern("homepage")
+	patternURL         = compilePattern("url")
+	patternLicense     = compilePattern("license")
+	patternDescription = compilePattern("description")
+	patternTopics      = regexp.MustCompile(`(?im)^\s*topics\s*=\s*\((.+)\)`)
+	patternTopicList   = regexp.MustCompile(`\s*['"](.+?)['"]\s*,?`)
+)
+
+func compilePattern(name string) *regexp.Regexp {
+	return regexp.MustCompile(`(?im)^\s*` + name + `\s*=\s*['"\(](.+)['"\)]`)
+}
+
+func ParseConanfile(r io.Reader) (*Metadata, error) {
+	buf, err := io.ReadAll(io.LimitReader(r, 1<<20))
+	if err != nil {
+		return nil, err
+	}
+
+	metadata := &Metadata{}
+
+	m := patternAuthor.FindSubmatch(buf)
+	if len(m) > 1 && len(m[1]) > 0 {
+		metadata.Author = string(m[1])
+	}
+	m = patternHomepage.FindSubmatch(buf)
+	if len(m) > 1 && len(m[1]) > 0 {
+		metadata.ProjectURL = string(m[1])
+	}
+	m = patternURL.FindSubmatch(buf)
+	if len(m) > 1 && len(m[1]) > 0 {
+		metadata.RepositoryURL = string(m[1])
+	}
+	m = patternLicense.FindSubmatch(buf)
+	if len(m) > 1 && len(m[1]) > 0 {
+		metadata.License = strings.ReplaceAll(strings.ReplaceAll(string(m[1]), "'", ""), "\"", "")
+	}
+	m = patternDescription.FindSubmatch(buf)
+	if len(m) > 1 && len(m[1]) > 0 {
+		metadata.Description = string(m[1])
+	}
+	m = patternTopics.FindSubmatch(buf)
+	if len(m) > 1 && len(m[1]) > 0 {
+		m2 := patternTopicList.FindAllSubmatch(m[1], -1)
+		if len(m2) > 0 {
+			metadata.Keywords = make([]string, 0, len(m2))
+			for _, g := range m2 {
+				if len(g) > 1 {
+					metadata.Keywords = append(metadata.Keywords, string(g[1]))
+				}
+			}
+		}
+	}
+	return metadata, nil
+}
diff --git a/modules/packages/conan/conanfile_parser_test.go b/modules/packages/conan/conanfile_parser_test.go
new file mode 100644
index 0000000..fe867fb
--- /dev/null
+++ b/modules/packages/conan/conanfile_parser_test.go
@@ -0,0 +1,51 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	name             = "ConanPackage"
+	version          = "1.2"
+	license          = "MIT"
+	author           = "Gitea <info@gitea.io>"
+	homepage         = "https://gitea.io/"
+	url              = "https://gitea.com/"
+	description      = "Description of ConanPackage"
+	topic1           = "gitea"
+	topic2           = "conan"
+	contentConanfile = `from conans import ConanFile, CMake, tools
+
+class ConanPackageConan(ConanFile):
+    name = "` + name + `"
+    version = "` + version + `"
+    license = "` + license + `"
+    author = "` + author + `"
+    homepage = "` + homepage + `"
+    url = "` + url + `"
+    description = "` + description + `"
+    topics = ("` + topic1 + `", "` + topic2 + `")
+    settings = "os", "compiler", "build_type", "arch"
+    options = {"shared": [True, False], "fPIC": [True, False]}
+    default_options = {"shared": False, "fPIC": True}
+    generators = "cmake"
+`
+)
+
+func TestParseConanfile(t *testing.T) {
+	metadata, err := ParseConanfile(strings.NewReader(contentConanfile))
+	require.NoError(t, err)
+	assert.Equal(t, license, metadata.License)
+	assert.Equal(t, author, metadata.Author)
+	assert.Equal(t, homepage, metadata.ProjectURL)
+	assert.Equal(t, url, metadata.RepositoryURL)
+	assert.Equal(t, description, metadata.Description)
+	assert.Equal(t, []string{topic1, topic2}, metadata.Keywords)
+}
diff --git a/modules/packages/conan/conaninfo_parser.go b/modules/packages/conan/conaninfo_parser.go
new file mode 100644
index 0000000..de11dbe
--- /dev/null
+++ b/modules/packages/conan/conaninfo_parser.go
@@ -0,0 +1,123 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+import (
+	"bufio"
+	"io"
+	"strings"
+
+	"code.gitea.io/gitea/modules/util"
+)
+
+// Conaninfo represents infos of a Conan package
+type Conaninfo struct {
+	Settings     map[string]string   `json:"settings"`
+	FullSettings map[string]string   `json:"full_settings"`
+	Requires     []string            `json:"requires"`
+	FullRequires []string            `json:"full_requires"`
+	Options      map[string]string   `json:"options"`
+	FullOptions  map[string]string   `json:"full_options"`
+	RecipeHash   string              `json:"recipe_hash"`
+	Environment  map[string][]string `json:"environment"`
+}
+
+func ParseConaninfo(r io.Reader) (*Conaninfo, error) {
+	sections, err := readSections(io.LimitReader(r, 1<<20))
+	if err != nil {
+		return nil, err
+	}
+
+	info := &Conaninfo{}
+	for section, lines := range sections {
+		if len(lines) == 0 {
+			continue
+		}
+		switch section {
+		case "settings":
+			info.Settings = toMap(lines)
+		case "full_settings":
+			info.FullSettings = toMap(lines)
+		case "options":
+			info.Options = toMap(lines)
+		case "full_options":
+			info.FullOptions = toMap(lines)
+		case "requires":
+			info.Requires = lines
+		case "full_requires":
+			info.FullRequires = lines
+		case "recipe_hash":
+			info.RecipeHash = lines[0]
+		case "env":
+			info.Environment = toMapArray(lines)
+		}
+	}
+	return info, nil
+}
+
+func readSections(r io.Reader) (map[string][]string, error) {
+	sections := make(map[string][]string)
+
+	section := ""
+	lines := make([]string, 0, 5)
+
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
+			if section != "" {
+				sections[section] = lines
+			}
+			section = line[1 : len(line)-1]
+			lines = make([]string, 0, 5)
+			continue
+		}
+		if section != "" {
+			if line != "" {
+				lines = append(lines, line)
+			}
+			continue
+		}
+		if line != "" {
+			return nil, util.NewInvalidArgumentErrorf("invalid conaninfo.txt")
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+	if section != "" {
+		sections[section] = lines
+	}
+	return sections, nil
+}
+
+func toMap(lines []string) map[string]string {
+	result := make(map[string]string)
+	for _, line := range lines {
+		parts := strings.SplitN(line, "=", 2)
+		if len(parts) != 2 || len(parts[0]) == 0 || len(parts[1]) == 0 {
+			continue
+		}
+		result[parts[0]] = parts[1]
+	}
+	return result
+}
+
+func toMapArray(lines []string) map[string][]string {
+	result := make(map[string][]string)
+	for _, line := range lines {
+		parts := strings.SplitN(line, "=", 2)
+		if len(parts) != 2 || len(parts[0]) == 0 || len(parts[1]) == 0 {
+			continue
+		}
+		var items []string
+		if strings.HasPrefix(parts[1], "[") && strings.HasSuffix(parts[1], "]") {
+			items = strings.Split(parts[1], ",")
+		} else {
+			items = []string{parts[1]}
+		}
+		result[parts[0]] = items
+	}
+	return result
+}
diff --git a/modules/packages/conan/conaninfo_parser_test.go b/modules/packages/conan/conaninfo_parser_test.go
new file mode 100644
index 0000000..dfb1836
--- /dev/null
+++ b/modules/packages/conan/conaninfo_parser_test.go
@@ -0,0 +1,85 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	settingsKey   = "arch"
+	settingsValue = "x84_64"
+	optionsKey    = "shared"
+	optionsValue  = "False"
+	requires      = "fmt/7.1.3"
+	hash          = "74714915a51073acb548ca1ce29afbac"
+	envKey        = "CC"
+	envValue      = "gcc-10"
+
+	contentConaninfo = `[settings]
+    ` + settingsKey + `=` + settingsValue + `
+
+[requires]
+    ` + requires + `
+
+[options]
+    ` + optionsKey + `=` + optionsValue + `
+
+[full_settings]
+    ` + settingsKey + `=` + settingsValue + `
+
+[full_requires]
+    ` + requires + `
+
+[full_options]
+    ` + optionsKey + `=` + optionsValue + `
+
+[recipe_hash]
+    ` + hash + `
+
+[env]
+` + envKey + `=` + envValue + `
+
+`
+)
+
+func TestParseConaninfo(t *testing.T) {
+	info, err := ParseConaninfo(strings.NewReader(contentConaninfo))
+	assert.NotNil(t, info)
+	require.NoError(t, err)
+	assert.Equal(
+		t,
+		map[string]string{
+			settingsKey: settingsValue,
+		},
+		info.Settings,
+	)
+	assert.Equal(t, info.Settings, info.FullSettings)
+	assert.Equal(
+		t,
+		map[string]string{
+			optionsKey: optionsValue,
+		},
+		info.Options,
+	)
+	assert.Equal(t, info.Options, info.FullOptions)
+	assert.Equal(
+		t,
+		[]string{requires},
+		info.Requires,
+	)
+	assert.Equal(t, info.Requires, info.FullRequires)
+	assert.Equal(t, hash, info.RecipeHash)
+	assert.Equal(
+		t,
+		map[string][]string{
+			envKey: {envValue},
+		},
+		info.Environment,
+	)
+}
diff --git a/modules/packages/conan/metadata.go b/modules/packages/conan/metadata.go
new file mode 100644
index 0000000..256a376
--- /dev/null
+++ b/modules/packages/conan/metadata.go
@@ -0,0 +1,23 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+const (
+	PropertyRecipeUser       = "conan.recipe.user"
+	PropertyRecipeChannel    = "conan.recipe.channel"
+	PropertyRecipeRevision   = "conan.recipe.revision"
+	PropertyPackageReference = "conan.package.reference"
+	PropertyPackageRevision  = "conan.package.revision"
+	PropertyPackageInfo      = "conan.package.info"
+)
+
+// Metadata represents the metadata of a Conan package
+type Metadata struct {
+	Author        string   `json:"author,omitempty"`
+	License       string   `json:"license,omitempty"`
+	ProjectURL    string   `json:"project_url,omitempty"`
+	RepositoryURL string   `json:"repository_url,omitempty"`
+	Description   string   `json:"description,omitempty"`
+	Keywords      []string `json:"keywords,omitempty"`
+}
diff --git a/modules/packages/conan/reference.go b/modules/packages/conan/reference.go
new file mode 100644
index 0000000..58f268b
--- /dev/null
+++ b/modules/packages/conan/reference.go
@@ -0,0 +1,155 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/util"
+)
+
+const (
+	// taken from https://github.com/conan-io/conan/blob/develop/conans/model/ref.py
+	minChars = 2
+	maxChars = 51
+
+	// DefaultRevision if no revision is specified
+	DefaultRevision = "0"
+)
+
+var (
+	namePattern     = regexp.MustCompile(fmt.Sprintf(`^[a-zA-Z0-9_][a-zA-Z0-9_\+\.-]{%d,%d}$`, minChars-1, maxChars-1))
+	revisionPattern = regexp.MustCompile(fmt.Sprintf(`^[a-zA-Z0-9]{1,%d}$`, maxChars))
+
+	ErrValidation = util.NewInvalidArgumentErrorf("could not validate one or more reference fields")
+)
+
+// RecipeReference represents a recipe <Name>/<Version>@<User>/<Channel>#<Revision>
+type RecipeReference struct {
+	Name     string
+	Version  string
+	User     string
+	Channel  string
+	Revision string
+}
+
+func NewRecipeReference(name, version, user, channel, revision string) (*RecipeReference, error) {
+	log.Trace("Conan Recipe: %s/%s(@%s/%s(#%s))", name, version, user, channel, revision)
+
+	if user == "_" {
+		user = ""
+	}
+	if channel == "_" {
+		channel = ""
+	}
+
+	if (user != "" && channel == "") || (user == "" && channel != "") {
+		return nil, ErrValidation
+	}
+
+	if !namePattern.MatchString(name) {
+		return nil, ErrValidation
+	}
+
+	v := strings.TrimSpace(version)
+	if v == "" {
+		return nil, ErrValidation
+	}
+	if user != "" && !namePattern.MatchString(user) {
+		return nil, ErrValidation
+	}
+	if channel != "" && !namePattern.MatchString(channel) {
+		return nil, ErrValidation
+	}
+	if revision != "" && !revisionPattern.MatchString(revision) {
+		return nil, ErrValidation
+	}
+
+	return &RecipeReference{name, v, user, channel, revision}, nil
+}
+
+func (r *RecipeReference) RevisionOrDefault() string {
+	if r.Revision == "" {
+		return DefaultRevision
+	}
+	return r.Revision
+}
+
+func (r *RecipeReference) String() string {
+	rev := ""
+	if r.Revision != "" {
+		rev = "#" + r.Revision
+	}
+	if r.User == "" || r.Channel == "" {
+		return fmt.Sprintf("%s/%s%s", r.Name, r.Version, rev)
+	}
+	return fmt.Sprintf("%s/%s@%s/%s%s", r.Name, r.Version, r.User, r.Channel, rev)
+}
+
+func (r *RecipeReference) LinkName() string {
+	user := r.User
+	if user == "" {
+		user = "_"
+	}
+	channel := r.Channel
+	if channel == "" {
+		channel = "_"
+	}
+	return fmt.Sprintf("%s/%s/%s/%s/%s", r.Name, r.Version, user, channel, r.RevisionOrDefault())
+}
+
+func (r *RecipeReference) WithRevision(revision string) *RecipeReference {
+	return &RecipeReference{r.Name, r.Version, r.User, r.Channel, revision}
+}
+
+// AsKey builds the additional key for the package file
+func (r *RecipeReference) AsKey() string {
+	return fmt.Sprintf("%s|%s|%s", r.User, r.Channel, r.RevisionOrDefault())
+}
+
+// PackageReference represents a package of a recipe <Name>/<Version>@<User>/<Channel>#<Revision> <Reference>#<Revision>
+type PackageReference struct {
+	Recipe    *RecipeReference
+	Reference string
+	Revision  string
+}
+
+func NewPackageReference(recipe *RecipeReference, reference, revision string) (*PackageReference, error) {
+	log.Trace("Conan Package: %v %s(#%s)", recipe, reference, revision)
+
+	if recipe == nil {
+		return nil, ErrValidation
+	}
+	if reference == "" || !revisionPattern.MatchString(reference) {
+		return nil, ErrValidation
+	}
+	if revision != "" && !revisionPattern.MatchString(revision) {
+		return nil, ErrValidation
+	}
+
+	return &PackageReference{recipe, reference, revision}, nil
+}
+
+func (r *PackageReference) RevisionOrDefault() string {
+	if r.Revision == "" {
+		return DefaultRevision
+	}
+	return r.Revision
+}
+
+func (r *PackageReference) LinkName() string {
+	return fmt.Sprintf("%s/%s", r.Reference, r.RevisionOrDefault())
+}
+
+func (r *PackageReference) WithRevision(revision string) *PackageReference {
+	return &PackageReference{r.Recipe, r.Reference, revision}
+}
+
+// AsKey builds the additional key for the package file
+func (r *PackageReference) AsKey() string {
+	return fmt.Sprintf("%s|%s|%s|%s|%s", r.Recipe.User, r.Recipe.Channel, r.Recipe.RevisionOrDefault(), r.Reference, r.RevisionOrDefault())
+}
diff --git a/modules/packages/conan/reference_test.go b/modules/packages/conan/reference_test.go
new file mode 100644
index 0000000..7d39bd8
--- /dev/null
+++ b/modules/packages/conan/reference_test.go
@@ -0,0 +1,148 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package conan
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNewRecipeReference(t *testing.T) {
+	cases := []struct {
+		Name     string
+		Version  string
+		User     string
+		Channel  string
+		Revision string
+		IsValid  bool
+	}{
+		{"", "", "", "", "", false},
+		{"name", "", "", "", "", false},
+		{"", "1.0", "", "", "", false},
+		{"", "", "user", "", "", false},
+		{"", "", "", "channel", "", false},
+		{"", "", "", "", "0", false},
+		{"name", "1.0", "", "", "", true},
+		{"name", "1.0", "user", "", "", false},
+		{"name", "1.0", "", "channel", "", false},
+		{"name", "1.0", "user", "channel", "", true},
+		{"name", "1.0", "_", "", "", true},
+		{"name", "1.0", "", "_", "", true},
+		{"name", "1.0", "_", "_", "", true},
+		{"name", "1.0", "_", "_", "0", true},
+		{"name", "1.0", "", "", "0", true},
+		{"name", "1.0.0q", "", "", "0", true},
+		{"name", "1.0", "", "", "000000000000000000000000000000000000000000000000000000000000", false},
+	}
+
+	for i, c := range cases {
+		rref, err := NewRecipeReference(c.Name, c.Version, c.User, c.Channel, c.Revision)
+		if c.IsValid {
+			require.NoError(t, err, "case %d, should be invalid", i)
+			assert.NotNil(t, rref, "case %d, should not be nil", i)
+		} else {
+			require.Error(t, err, "case %d, should be valid", i)
+		}
+	}
+}
+
+func TestRecipeReferenceRevisionOrDefault(t *testing.T) {
+	rref, err := NewRecipeReference("name", "1.0", "", "", "")
+	require.NoError(t, err)
+	assert.Equal(t, DefaultRevision, rref.RevisionOrDefault())
+
+	rref, err = NewRecipeReference("name", "1.0", "", "", DefaultRevision)
+	require.NoError(t, err)
+	assert.Equal(t, DefaultRevision, rref.RevisionOrDefault())
+
+	rref, err = NewRecipeReference("name", "1.0", "", "", "Az09")
+	require.NoError(t, err)
+	assert.Equal(t, "Az09", rref.RevisionOrDefault())
+}
+
+func TestRecipeReferenceString(t *testing.T) {
+	rref, err := NewRecipeReference("name", "1.0", "", "", "")
+	require.NoError(t, err)
+	assert.Equal(t, "name/1.0", rref.String())
+
+	rref, err = NewRecipeReference("name", "1.0", "user", "channel", "")
+	require.NoError(t, err)
+	assert.Equal(t, "name/1.0@user/channel", rref.String())
+
+	rref, err = NewRecipeReference("name", "1.0", "user", "channel", "Az09")
+	require.NoError(t, err)
+	assert.Equal(t, "name/1.0@user/channel#Az09", rref.String())
+}
+
+func TestRecipeReferenceLinkName(t *testing.T) {
+	rref, err := NewRecipeReference("name", "1.0", "", "", "")
+	require.NoError(t, err)
+	assert.Equal(t, "name/1.0/_/_/0", rref.LinkName())
+
+	rref, err = NewRecipeReference("name", "1.0", "user", "channel", "")
+	require.NoError(t, err)
+	assert.Equal(t, "name/1.0/user/channel/0", rref.LinkName())
+
+	rref, err = NewRecipeReference("name", "1.0", "user", "channel", "Az09")
+	require.NoError(t, err)
+	assert.Equal(t, "name/1.0/user/channel/Az09", rref.LinkName())
+}
+
+func TestNewPackageReference(t *testing.T) {
+	rref, _ := NewRecipeReference("name", "1.0", "", "", "")
+
+	cases := []struct {
+		Recipe    *RecipeReference
+		Reference string
+		Revision  string
+		IsValid   bool
+	}{
+		{nil, "", "", false},
+		{rref, "", "", false},
+		{nil, "aZ09", "", false},
+		{rref, "aZ09", "", true},
+		{rref, "", "Az09", false},
+		{rref, "aZ09", "Az09", true},
+	}
+
+	for i, c := range cases {
+		pref, err := NewPackageReference(c.Recipe, c.Reference, c.Revision)
+		if c.IsValid {
+			require.NoError(t, err, "case %d, should be invalid", i)
+			assert.NotNil(t, pref, "case %d, should not be nil", i)
+		} else {
+			require.Error(t, err, "case %d, should be valid", i)
+		}
+	}
+}
+
+func TestPackageReferenceRevisionOrDefault(t *testing.T) {
+	rref, _ := NewRecipeReference("name", "1.0", "", "", "")
+
+	pref, err := NewPackageReference(rref, "ref", "")
+	require.NoError(t, err)
+	assert.Equal(t, DefaultRevision, pref.RevisionOrDefault())
+
+	pref, err = NewPackageReference(rref, "ref", DefaultRevision)
+	require.NoError(t, err)
+	assert.Equal(t, DefaultRevision, pref.RevisionOrDefault())
+
+	pref, err = NewPackageReference(rref, "ref", "Az09")
+	require.NoError(t, err)
+	assert.Equal(t, "Az09", pref.RevisionOrDefault())
+}
+
+func TestPackageReferenceLinkName(t *testing.T) {
+	rref, _ := NewRecipeReference("name", "1.0", "", "", "")
+
+	pref, err := NewPackageReference(rref, "ref", "")
+	require.NoError(t, err)
+	assert.Equal(t, "ref/0", pref.LinkName())
+
+	pref, err = NewPackageReference(rref, "ref", "Az09")
+	require.NoError(t, err)
+	assert.Equal(t, "ref/Az09", pref.LinkName())
+}