gnu: bitcoin-core: Update to 0.20.1.

* gnu/packages/finance.scm (bitcoin-core): Update to 0.20.1.
[source]: Remove obsolete patch.
[native-inputs]: Add autoconf, automake and libtool.
[inputs]: Remove protobuf.
[arguments]: Add "set-no-git-flag" phase to indicate the build is not taking
place within a git repository.
* gnu/packages/patches/bitcoin-core-python-compat.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu/local.mk

@@ -846,7 +846,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/binutils-loongson-workaround.patch	\
   %D%/packages/patches/binutils-mingw-w64-timestamp.patch	\
   %D%/packages/patches/binutils-mingw-w64-deterministic.patch	\
-  %D%/packages/patches/bitcoin-core-python-compat.patch		\
   %D%/packages/patches/blender-2.79-gcc8.patch			\
   %D%/packages/patches/blender-2.79-gcc9.patch			\
   %D%/packages/patches/blender-2.79-newer-ffmpeg.patch		\

gnu/packages/finance.scm

@@ -108,7 +108,7 @@
 (define-public bitcoin-core
   (package
     (name "bitcoin-core")
-    (version "0.19.1")
+    (version "0.20.1")
     (source (origin
               (method url-fetch)
               (uri
@@ -116,11 +116,13 @@
                               version "/bitcoin-" version ".tar.gz"))
               (sha256
                (base32
-                "1h3w7brc18145np920vy7j5ms5hym59hvr40swdjx34fbdaisngj"))
-              (patches (search-patches "bitcoin-core-python-compat.patch"))))
+                "0y5rad68b398arh0abr2wgiwybdw0i5a4dxz9s3fk9fgdbyn5gab"))))
     (build-system gnu-build-system)
     (native-inputs
-     `(("pkg-config" ,pkg-config)
+     `(("autoconf" ,autoconf)
+       ("automake" ,automake)
+       ("libtool" ,libtool)
+       ("pkg-config" ,pkg-config)
        ("python" ,python)               ; for the tests
        ("util-linux" ,util-linux)       ; provides the hexdump command for tests
        ("qttools" ,qttools)))
@@ -130,7 +132,6 @@
        ("libevent" ,libevent)
        ("miniupnpc" ,miniupnpc)
        ("openssl" ,openssl)
-       ("protobuf" ,protobuf)
        ("qtbase" ,qtbase)))
     (arguments
      `(#:configure-flags
@@ -154,6 +155,13 @@
              ;; Make Qt deterministic.
              (setenv "QT_RCC_SOURCE_DATE_OVERRIDE" "1")
              #t))
+         (add-before 'build 'set-no-git-flag
+           (lambda _
+             ;; Make it clear we are not building from within a git repository
+             ;; (and thus no information regarding this build is available
+             ;; from git).
+             (setenv "BITCOIN_GENBUILD_NO_GIT" "1")
+             #t))
          (add-before 'check 'set-home
            (lambda _
              (setenv "HOME" (getenv "TMPDIR")) ; tests write to $HOME

gnu/packages/patches/bitcoin-core-python-compat.patch

@@ -1,28 +0,0 @@
-Get rid of deprecation warning emitted by Python 3.8, which causes a test failure(!).
-
-https://github.com/bitcoin/bitcoin/pull/17931
-
-Taken from upstream:
-
-https://github.com/bitcoin/bitcoin/commit/f117fb00da747147cddfb071c1427a2754c278cd
-
-diff --git a/test/functional/p2p_invalid_messages.py b/test/functional/p2p_invalid_messages.py
-index 20864881c165..07eacf410d88 100755
---- a/test/functional/p2p_invalid_messages.py
-+++ b/test/functional/p2p_invalid_messages.py
-@@ -145,13 +145,13 @@ def run_test(self):
-     def test_magic_bytes(self):
-         conn = self.nodes[0].add_p2p_connection(P2PDataStore())
- 
--        def swap_magic_bytes():
-+        async def swap_magic_bytes():
-             conn._on_data = lambda: None  # Need to ignore all incoming messages from now, since they come with "invalid" magic bytes
-             conn.magic_bytes = b'\x00\x11\x22\x32'
- 
-         # Call .result() to block until the atomic swap is complete, otherwise
-         # we might run into races later on
--        asyncio.run_coroutine_threadsafe(asyncio.coroutine(swap_magic_bytes)(), NetworkThread.network_event_loop).result()
-+        asyncio.run_coroutine_threadsafe(swap_magic_bytes(), NetworkThread.network_event_loop).result()
- 
-         with self.nodes[0].assert_debug_log(['PROCESSMESSAGE: INVALID MESSAGESTART ping']):
-             conn.send_message(messages.msg_ping(nonce=0xff))