1 files changed, 123 insertions, 0 deletions
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
+}