1 files changed, 67 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
+}