From f36d8e98512f31742ab5a32d560c8e4a89fc1e76 Mon Sep 17 00:00:00 2001
From: Emmanuel Engelhart <kelson@kiwix.org>
Date: Wed, 29 Dec 2021 08:20:49 +0100
Subject: [PATCH] New kiwix::getVersions() and printVersions()

---
 include/kiwix.h     |  2 +-
 include/meson.build |  3 +-
 include/version.h   | 33 +++++++++++++++++++
 src/meson.build     |  3 +-
 src/version.cpp     | 77 +++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 115 insertions(+), 3 deletions(-)
 create mode 100644 include/version.h
 create mode 100644 src/version.cpp

diff --git a/include/kiwix.h b/include/kiwix.h
index 16cd27b4a..0b5e8ac4a 100644
--- a/include/kiwix.h
+++ b/include/kiwix.h
@@ -22,4 +22,4 @@
 
 #include "library.h"
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/meson.build b/include/meson.build
index d19b159eb..50eabfbfa 100644
--- a/include/meson.build
+++ b/include/meson.build
@@ -14,7 +14,8 @@ headers = [
   'server.h',
   'kiwixserve.h',
   'name_mapper.h',
-  'tools.h'
+  'tools.h',
+  'version.h'
 ]
 
 install_headers(headers, subdir:'kiwix')
diff --git a/include/version.h b/include/version.h
new file mode 100644
index 000000000..c0a21b584
--- /dev/null
+++ b/include/version.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2021 Emmanuel Engelhart <kelson@kiwix.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU  General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#ifndef KIWIX_VERSION_H
+#define KIWIX_VERSION_H
+
+#include <string>
+#include <vector>
+
+namespace kiwix
+{
+  typedef std::vector<std::pair<std::string, std::string>> LibVersions;
+  LibVersions getVersions();
+  void printVersions(std::ostream& out = std::cout);
+}
+
+#endif // KIWIX_VERSION_H
diff --git a/src/meson.build b/src/meson.build
index 43f863e07..545d1bc99 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -28,7 +28,8 @@ kiwix_sources = [
   'server/response.cpp',
   'server/internalServer.cpp',
   'server/internalServer_catalog_v2.cpp',
-  'opds_catalog.cpp'
+  'opds_catalog.cpp',
+  'version.cpp'
 ]
 kiwix_sources += lib_resources
 
diff --git a/src/version.cpp b/src/version.cpp
new file mode 100644
index 000000000..d804fc88e
--- /dev/null
+++ b/src/version.cpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2021 Emmanuel Engelhart <kelson@kiwix.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU  General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <iostream>
+#include <sstream>
+
+#include <version.h>
+#include <zim/zim.h>
+#include <kiwix_config.h>
+#include <unicode/uversion.h>
+#include <pugixml.hpp>
+#include <curl/curl.h>
+#include <microhttpd.h>
+#include <xapian.h>
+#include <mustache.hpp>
+#include <zlib.h>
+
+namespace kiwix
+{
+  LibVersions getVersions() {
+    LibVersions versions = {
+      { "libkiwix",      LIBKIWIX_VERSION    },
+      { "libzim",        LIBZIM_VERSION      },
+      { "libxapian",     XAPIAN_VERSION      },
+      { "libcurl",       LIBCURL_VERSION     },
+      { "libmicrohttpd", MHD_get_version()   },
+      { "libz",          ZLIB_VERSION        }
+    };
+
+    // U_ICU_VERSION does not include the patch level if 0
+    std::ostringstream libicu_version;
+    libicu_version << U_ICU_VERSION_MAJOR_NUM << "." << U_ICU_VERSION_MINOR_NUM << "." << U_ICU_VERSION_PATCHLEVEL_NUM;
+    versions.push_back({ "libicu", libicu_version.str() });
+
+    // No human readable version string for pugixml
+    const unsigned pugixml_major = (PUGIXML_VERSION - PUGIXML_VERSION % 1000) / 1000;
+    const unsigned pugixml_minor = (PUGIXML_VERSION - pugixml_major * 1000 - PUGIXML_VERSION % 10) / 10;
+    const unsigned pugixml_patch = PUGIXML_VERSION - pugixml_major * 1000 - pugixml_minor * 10;
+    std::ostringstream libpugixml_version;
+    libpugixml_version << pugixml_major << "." << pugixml_minor << "." << pugixml_patch;
+    versions.push_back({ "libpugixml", libpugixml_version.str() });
+
+    // Needs version 5.0 of Mustache
+#if defined(KAINJOW_MUSTACHE_VERSION_MAJOR)
+    std::ostringstream libmustache_version;
+    libmustache_version << KAINJOW_MUSTACHE_VERSION_MAJOR << "." <<
+      KAINJOW_MUSTACHE_VERSION_MINOR << "." << KAINJOW_MUSTACHE_VERSION_PATCH;
+    versions.push_back({ "libmustache", libmustache_version.str() });
+#endif
+
+    return versions;
+  }
+
+  void printVersions(std::ostream& out) {
+    LibVersions versions = getVersions();
+    for (const auto& iter : versions) {
+      out << (iter != versions.front() ? "+ " : "")
+                << iter.first << " " << iter.second << std::endl;
+    }
+  }
+} //namespace kiwix