From 5da990661a4b50b9f53a39ff28c292933fdf6772 Mon Sep 17 00:00:00 2001
From: Richard Holland <richard.holland@starstone.co.nz>
Date: Tue, 7 Feb 2023 16:15:57 +0000
Subject: [PATCH] version string generation

---
 src/ripple/protocol/BuildInfo.h        |  2 +-
 src/ripple/protocol/impl/BuildInfo.cpp | 76 +++++++++++++++++++++++++-
 2 files changed, 74 insertions(+), 4 deletions(-)

diff --git a/src/ripple/protocol/BuildInfo.h b/src/ripple/protocol/BuildInfo.h
index cfe35d338..cc87c862c 100644
--- a/src/ripple/protocol/BuildInfo.h
+++ b/src/ripple/protocol/BuildInfo.h
@@ -69,7 +69,7 @@ getFullVersionString();
     @return the encoded version in a 64-bit integer
 */
 std::uint64_t
-encodeSoftwareVersion(char const* const versionStr);
+encodeSoftwareVersion(char const* versionStr);
 
 /** Returns this server's version packed in a 64-bit integer. */
 std::uint64_t
diff --git a/src/ripple/protocol/impl/BuildInfo.cpp b/src/ripple/protocol/impl/BuildInfo.cpp
index 3745a9c21..6c49455d3 100644
--- a/src/ripple/protocol/impl/BuildInfo.cpp
+++ b/src/ripple/protocol/impl/BuildInfo.cpp
@@ -48,8 +48,77 @@ char const* const versionString = "0.0.0"
 std::string const&
 getVersionString()
 {
-    static std::string const value = [] {
-        std::string const s = versionString;
+    // if the external build engine fails to populate the version string,
+    // then we will do it ourselves.
+    static std::string generatedVersionString;
+    if (generatedVersionString == "" &&
+        (versionString == std::string("0.0.0") || versionString == std::string("0.0.0+DEBUG")))
+    {
+        std::string y = std::string(__DATE__ + 7);
+        std::string d = std::string(__DATE__ + 4 +
+            (__DATE__[4] == ' ' ? 1 : 0),
+            __DATE__[4] == ' ' ? 1 : 2 );
+        std::string m;
+        switch (__DATE__[0])
+        {
+            case 'J':
+            {
+                m = __DATE__[1] == 'a' ? "1" :
+                    __DATE__[2] == 'n' ? "6" : "7";
+                break;
+            }
+            case 'F':
+            {
+                m = "2";
+                break;
+            }
+            case 'M':
+            {
+                m = __DATE__[2] == 'r' ? "3" : "5";
+                break;
+            }
+            case 'A':
+            {
+                m = __DATE__[1] == 'p' ? "4" : "8";
+                break;
+            }
+            case 'S':
+            {
+                m = "9";
+                break;
+            }
+            case 'O':
+            {
+                m = "10";
+                break;
+            }
+            case 'N':
+            {
+                m = "11";
+                break;
+            }
+            case 'D':
+            {
+                m = "12";
+                break;
+            }
+            default:
+            {
+                m = "13";
+                break;
+            }
+        }
+        generatedVersionString = y + "." + m + "." + d;
+        generatedVersionString += "-CustomBuild";
+        #ifdef DEBUG
+            generatedVersionString += "+DEBUG";
+        #endif
+    }
+
+
+    static std::string const value = [&] {
+        std::string const s =
+            generatedVersionString != "" ? generatedVersionString : versionString;
         beast::SemanticVersion v;
         if (!v.parse(s) || v.print() != s)
             LogicError(s + ": Bad server version string");
@@ -71,8 +140,9 @@ static constexpr std::uint64_t implementationVersionIdentifierMask =
     0xFFFF'0000'0000'0000LLU;
 
 std::uint64_t
-encodeSoftwareVersion(char const* const versionStr)
+encodeSoftwareVersion(char const* versionStr)
 {
+
     std::uint64_t c = implementationVersionIdentifier;
 
     beast::SemanticVersion v;