[SCons] Build OpenSSL from source by default

Remove prebuilt static libraries for macOS.

Can optionally still use external (static) libraries by supplying the
`openssl_external_*` parameters to scons.

.gitignore

@@ -17,7 +17,11 @@ extension_api.json
 # Mac stuff
 .DS_Store
 
+# Vim
+*.swp
+
 # Binaries
+__pycache__/
 build/
 bin/
 macos/
@@ -29,4 +33,4 @@ win64/
 *.os
 *.ilk
 *.pdb
-!thirdparty/openssl/*
+*.pyc

.gitmodules

@@ -9,3 +9,6 @@
 [submodule "thirdparty/ssh2/libssh2"]
 	path = thirdparty/ssh2/libssh2
 	url = https://github.com/libssh2/libssh2
+[submodule "thirdparty/openssl"]
+	path = thirdparty/openssl
+	url = https://github.com/openssl/openssl

SConstruct

@@ -14,16 +14,6 @@ opts.Add(PathVariable("target_path",
          "The path where the lib is installed.", "demo/addons/godot-git-plugin/"))
 opts.Add(PathVariable("target_name", "The library name.",
          "libgit_plugin", PathVariable.PathAccept))
-opts.Add(PathVariable("macos_openssl", "Path to OpenSSL library root - only used in macOS builds.",
-                      "/usr/local/opt/openssl@1.1/", PathVariable.PathAccept))  # TODO: Find a way to configure this to use the cloned OpenSSL source code, based on `macos_arch`.
-opts.Add(PathVariable("macos_openssl_static_ssl", "Path to OpenSSL libssl.a library - only used in macOS builds.",
-         os.path.join(os.path.abspath(os.getcwd()), "thirdparty/openssl/libssl.a"), PathVariable.PathAccept))
-opts.Add(PathVariable("macos_openssl_static_crypto", "Path to OpenSSL libcrypto.a library - only used in macOS builds.",
-         os.path.join(os.path.abspath(os.getcwd()), "thirdparty/openssl/libcrypto.a"), PathVariable.PathAccept))
-opts.Add(PathVariable("linux_openssl_static_ssl", "Path to OpenSSL libssl.a library - only used in Linux builds.",
-         "/usr/lib/x86_64-linux-gnu/libssl.a", PathVariable.PathAccept))
-opts.Add(PathVariable("linux_openssl_static_crypto", "Path to OpenSSL libcrypto.a library - only used in Linux builds.",
-         "/usr/lib/x86_64-linux-gnu/libcrypto.a", PathVariable.PathAccept))
 
 # Updates the environment with the option variables.
 opts.Update(env)
@@ -33,8 +23,18 @@ if ARGUMENTS.get("custom_api_file", "") != "":
 
 ARGUMENTS["target"] = "editor"
 env = SConscript("godot-cpp/SConstruct").Clone()
+
+# OpenSSL Builder
+env.Tool("openssl", toolpath=["tools"])
+
 opts.Update(env)
 
+if env["platform"] != "windows":  # Windows does not need OpenSSL
+    ssl = env.OpenSSL()
+else:
+    ssl = []
+
+Export("ssl")
 Export("env")
 
 SConscript("thirdparty/SCsub")

THIRDPARTY.md

@@ -5,10 +5,7 @@ The Godot Git Plugin source code uses the following third-party source code:
 1. godotengine/godot-cpp - MIT License - https://github.com/godotengine/godot-cpp/tree/02336831735fd6affbe0a6fa252ec98d3e78120c
 2. libgit2/libgit2 - GPLv2 with a special Linking Exception - https://github.com/libgit2/libgit2/tree/b7bad55e4bb0a285b073ba5e02b01d3f522fc95d
 3. libssh2/libssh2 - BSD-3-Clause License - https://github.com/libssh2/libssh2/tree/635caa90787220ac3773c1d5ba11f1236c22eae8
-
-We also link to these third-party libraries (only in the compiled binary form):
-
-1. OpenSSL - Only on Linux and MacOS - OpenSSL License - http://www.openssl.org/source/openssl-1.1.1s.tar.gz
+4. openssl (only on Linux and MacOS) - OpenSSL License - https://github.com/openssl/openssl/tree/26baecb28ce461696966dac9ac889629db0b3b96
 
 ## License Texts
 

godot-git-plugin/SCsub

@@ -4,6 +4,7 @@ import os
 
 env = {}
 Import("env")
+Import("ssl")
 
 # Process some arguments
 if env["use_llvm"]:
@@ -24,8 +25,6 @@ if env["platform"] == "macos":
     env["target_path"] += "macos/"
 
     # Force static linkage (https://stackoverflow.com/a/2995999/7370948)
-    env.Append(LIBS=[File(env["macos_openssl_static_ssl"]),
-                     File(env["macos_openssl_static_crypto"])])
 
     if env["macos_deployment_target"] != "default":
         env.Append(CCFLAGS=["-mmacosx-version-min=" +
@@ -35,8 +34,6 @@ if env["platform"] == "macos":
 
 elif env["platform"] == "linux":
     env["target_path"] += "linux/"
-    env.Append(LIBS=[File(env["linux_openssl_static_ssl"]),
-                     File(env["linux_openssl_static_crypto"])])
 
 elif env["platform"] == "windows":
     env["target_path"] += "win64/"
@@ -50,9 +47,11 @@ env.Append(CPPPATH=["../thirdparty/git2/libgit2/include/"])
 env.Append(LIBPATH=["../thirdparty/bin/"])
 env.Prepend(LIBS=["git2", "ssh2"])
 
+lib_sources = Glob("src/*.cpp")
+env.Depends(lib_sources, ssl)
 library = env.SharedLibrary(
     target=env["target_path"] +
     "{}{}{}".format(env["target_name"], env["suffix"], env["SHLIBSUFFIX"]),
-    source=Glob("src/*.cpp")
+    source=lib_sources
 )
 Default(library)

thirdparty/git2/SCsub

@@ -3,6 +3,7 @@
 # Adopted from https://github.com/goostengine/goost/blob/20d8ce4c7d74c26832d69283305b25a72165784a/modules/git/SCsub
 
 Import("env")
+Import("ssl")
 
 env_git = env.Clone()
 
@@ -125,11 +126,6 @@ if env_git["platform"] in ["linux", "macos"]:
             "UNICODE_BUILTIN"
         ]
     )
-
-if env_git["platform"] == "macos":
-    env_git.Prepend(CPPPATH=[env_git["macos_openssl"] + "include/"])
-    static_ssl = File(env_git["macos_openssl_static_ssl"])
-    static_crypto = File(env_git["macos_openssl_static_crypto"])
-    env_git.Append(LIBS=[static_ssl, static_crypto])
+    env_git.Depends(libgit2_sources, ssl)
 
 env_git.StaticLibrary(target="../bin/" + "git2", source=libgit2_sources)

thirdparty/ssh2/SCsub

@@ -3,6 +3,7 @@
 # Adopted from https://github.com/nodegit/nodegit/blob/4561dcb7c120474a4553baa27e4c4c2f4be23a2b/vendor/libgit2.gyp
 
 Import("env")
+Import("ssl")
 
 env_ssh2 = env.Clone()
 
@@ -104,11 +105,6 @@ if env_ssh2["platform"] in ["linux", "macos"]:
             ("STDC_HEADERS", 1)
         ]
     )
-
-if env_ssh2["platform"] == "macos":
-    env_ssh2.Append(CPPPATH=[env_ssh2["macos_openssl"] + "include/"])
-    static_ssl = File(env_ssh2["macos_openssl_static_ssl"])
-    static_crypto = File(env_ssh2["macos_openssl_static_crypto"])
-    env_ssh2.Append(LIBS=[static_ssl, static_crypto])
+    env_ssh2.Depends(libssh2_sources, ssl)
 
 env_ssh2.StaticLibrary(target="../bin/" + "ssh2", source=libssh2_sources)