Display packages installed from a repository

1 files changed, 139 insertions, 0 deletions

diff --git a/katja/sbo.cpp b/katja/sbo.cpp
new file mode 100644
index 0000000..161e834
--- /dev/null
+++ b/katja/sbo.cpp
@@ -0,0 +1,139 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+#include <fstream>
+
+#include <boost/algorithm/string.hpp>
+
+#include "katja/sbo.hpp"
+
+namespace katja
+{
+    info_file::info_file(const std::string& program_name, const std::string& version,
+            const std::string homepage, const std::string& email, const std::string& maintainer)
+        : program_name(program_name), version(version), homepage(homepage), email(email), maintainer(maintainer)
+    {
+    }
+
+    bool trim_info_line(std::string& info_value)
+    {
+        if (boost::algorithm::ends_with(info_value, "\""))
+        {
+            info_value.pop_back();
+            return false;
+        }
+        else if (boost::algorithm::ends_with(info_value, "\\"))
+        {
+            info_value.pop_back();
+            return true;
+        }
+        return false;
+    }
+
+    std::optional<info_file> read_slackbuild_info(const std::filesystem::path& info_filepath)
+    {
+        std::ifstream info_stream{ info_filepath };
+        std::string info_line, info_variable, info_value;
+        std::string program_name, version, homepage, email, maintainer;
+        std::vector<std::string> download, md5sum, download_x86_64, md5sum_x86_64, requires;
+        bool continuation{ false };
+
+        while (std::getline(info_stream, info_line))
+        {
+            if (info_line.empty())
+            {
+                continue;
+            }
+            else if (!continuation)
+            {
+                auto equals_position = std::find(info_line.cbegin(), info_line.cend(), '=');
+                info_variable = std::string(info_line.cbegin(), equals_position);
+
+                if (equals_position == info_line.cend()
+                        || ++equals_position == info_line.cend() || *equals_position != '"')
+                {
+                    return std::nullopt;
+                }
+                info_value = std::string(std::next(equals_position), info_line.cend());
+            }
+            else
+            {
+                info_value += info_line;
+            }
+            continuation = trim_info_line(info_value);
+
+            if (!continuation)
+            {
+                if (info_variable == "PRGNAM")
+                {
+                    std::swap(program_name, info_value);
+                }
+                else if (info_variable == "VERSION")
+                {
+                    std::swap(version, info_value);
+                }
+                else if (info_variable == "HOMEPAGE")
+                {
+                    std::swap(homepage, info_value);
+                }
+                else if (info_variable == "EMAIL")
+                {
+                    std::swap(email, info_value);
+                }
+                else if (info_variable == "MAINTAINER")
+                {
+                    std::swap(maintainer, info_value);
+                }
+                else if (info_variable == "DOWNLOAD")
+                {
+                    boost::split(download, info_value, boost::is_any_of(" "), boost::token_compress_on);
+                }
+                else if (info_variable == "MD5SUM")
+                {
+                    boost::split(md5sum, info_value, boost::is_any_of(" "), boost::token_compress_on);
+                }
+                else if (info_variable == "DOWNLOAD_x86_64")
+                {
+                    boost::split(download_x86_64, info_value, boost::is_any_of(" "), boost::token_compress_on);
+                }
+                else if (info_variable == "MD5SUM_x86_64")
+                {
+                    boost::split(md5sum_x86_64, info_value, boost::is_any_of(" "), boost::token_compress_on);
+                }
+                else if (info_variable == "REQUIRES")
+                {
+                    boost::split(requires, info_value, boost::is_any_of(" "), boost::token_compress_on);
+                }
+           }
+        }
+        return std::make_optional<info_file>(program_name, version, homepage, email, maintainer);
+    }
+
+    void search_for_slackbuilds(std::vector<info_file>& info_files, const std::filesystem::path& directory)
+    {
+        for (const auto& entry : std::filesystem::directory_iterator(directory))
+        {
+            std::filesystem::path entry_path = entry;
+            std::filesystem::path info_filename = entry_path.filename();
+            info_filename.replace_extension(".info");
+
+            std::filesystem::path info_filepath = entry_path / info_filename;
+
+            if (std::filesystem::exists(info_filepath))
+            {
+                auto slackbuild_info = read_slackbuild_info(info_filepath);
+
+                if (slackbuild_info.has_value())
+                {
+                    info_files.emplace_back(std::move(slackbuild_info.value()));
+                }
+            }
+            else if (std::filesystem::is_directory(entry_path))
+            {
+                search_for_slackbuilds(info_files, entry_path);
+            }
+        }
+    }
+}