Merge #13954: Warn (don't fail!) on spelling errors. Fix typos reported by codespell.

f8a81f73ac lint: Add spell check linter (codespell) (practicalswift)
ada356208e Fix typos reported by codespell (practicalswift)

Pull request description:

  * Check for common misspellings using `codespell`.
  * Fix recently introduced typos reported by `codespell`.

Tree-SHA512: 9974c0e640b411c7d0ebc5b45de253c19bac7fe3002cd98601ff8da8db584224c2fd7d331aee3df612c9f2cfef540d647a9b4c5a1a73fd208dc93ce4bf9e5e3e

10 files changed, 34 insertions, 13 deletions

diff --git a/test/functional/example_test.py b/test/functional/example_test.py
index a8c1474876..3edd760b90 100755
--- a/test/functional/example_test.py
+++ b/test/functional/example_test.py
@@ -76,7 +76,7 @@ class ExampleTest(BitcoinTestFramework):
     def set_test_params(self):
         """Override test parameters for your individual test.
 
-        This method must be overridden and num_nodes must be exlicitly set."""
+        This method must be overridden and num_nodes must be explicitly set."""
         self.setup_clean_chain = True
         self.num_nodes = 3
         # Use self.extra_args to change command-line arguments for the nodes
diff --git a/test/functional/feature_block.py b/test/functional/feature_block.py
index e81ea12d0f..450cef37c0 100755
--- a/test/functional/feature_block.py
+++ b/test/functional/feature_block.py
@@ -989,7 +989,7 @@ class FullBlockTest(BitcoinTestFramework):
         assert_equal(get_legacy_sigopcount_block(b73), MAX_BLOCK_SIGOPS + 1)
         self.sync_blocks([b73], success=False, reject_code=16, reject_reason=b'bad-blk-sigops', reconnect=True)
 
-        # b74/75 - if we push an invalid script element, all prevous sigops are counted,
+        # b74/75 - if we push an invalid script element, all previous sigops are counted,
         #          but sigops after the element are not counted.
         #
         #       The invalid script element is that the push_data indicates that
diff --git a/test/functional/mining_getblocktemplate_longpoll.py b/test/functional/mining_getblocktemplate_longpoll.py
index 2bcbe8db7b..1259754c5a 100755
--- a/test/functional/mining_getblocktemplate_longpoll.py
+++ b/test/functional/mining_getblocktemplate_longpoll.py
@@ -15,8 +15,8 @@ class LongpollThread(threading.Thread):
     def __init__(self, node):
         threading.Thread.__init__(self)
         # query current longpollid
-        templat = node.getblocktemplate()
-        self.longpollid = templat['longpollid']
+        template = node.getblocktemplate()
+        self.longpollid = template['longpollid']
         # create a new connection to the node, we can't use the same
         # connection from two threads
         self.node = get_rpc_proxy(node.url, 1, timeout=600, coveragedir=node.coverage_dir)
@@ -31,11 +31,11 @@ class GetBlockTemplateLPTest(BitcoinTestFramework):
     def run_test(self):
         self.log.info("Warning: this test will take about 70 seconds in the best case. Be patient.")
         self.nodes[0].generate(10)
-        templat = self.nodes[0].getblocktemplate()
-        longpollid = templat['longpollid']
+        template = self.nodes[0].getblocktemplate()
+        longpollid = template['longpollid']
         # longpollid should not change between successive invocations if nothing else happens
-        templat2 = self.nodes[0].getblocktemplate()
-        assert(templat2['longpollid'] == longpollid)
+        template2 = self.nodes[0].getblocktemplate()
+        assert(template2['longpollid'] == longpollid)
 
         # Test 1: test that the longpolling wait if we do nothing
         thr = LongpollThread(self.nodes[0])
diff --git a/test/functional/p2p_invalid_tx.py b/test/functional/p2p_invalid_tx.py
index 12bc62131f..40373689de 100755
--- a/test/functional/p2p_invalid_tx.py
+++ b/test/functional/p2p_invalid_tx.py
@@ -76,7 +76,7 @@ class InvalidTxRequestTest(BitcoinTestFramework):
         self.reconnect_p2p(num_connections=2)
 
         self.log.info('Test orphan transaction handling ... ')
-        # Create a root transaction that we withhold until all dependend transactions
+        # Create a root transaction that we withhold until all dependent transactions
         # are sent out and in the orphan cache
         SCRIPT_PUB_KEY_OP_TRUE = b'\x51\x75' * 15 + b'\x51'
         tx_withhold = CTransaction()
diff --git a/test/functional/p2p_node_network_limited.py b/test/functional/p2p_node_network_limited.py
index c987bf4b05..4740740d42 100755
--- a/test/functional/p2p_node_network_limited.py
+++ b/test/functional/p2p_node_network_limited.py
@@ -89,7 +89,7 @@ class NodeNetworkLimitedTest(BitcoinTestFramework):
             sync_blocks([self.nodes[0], self.nodes[2]], timeout=5)
         except:
             pass
-        # node2 must remain at heigh 0
+        # node2 must remain at height 0
         assert_equal(self.nodes[2].getblockheader(self.nodes[2].getbestblockhash())['height'], 0)
 
         # now connect also to node 1 (non pruned)
diff --git a/test/functional/p2p_segwit.py b/test/functional/p2p_segwit.py
index 45dc2928d3..161efcf2e9 100755
--- a/test/functional/p2p_segwit.py
+++ b/test/functional/p2p_segwit.py
@@ -471,7 +471,7 @@ class SegWitTest(BitcoinTestFramework):
         blocks are permitted to contain witnesses)."""
 
         # node2 doesn't need to be connected for this test.
-        # (If it's connected, node0 may propogate an invalid block to it over
+        # (If it's connected, node0 may propagate an invalid block to it over
         # compact blocks and the nodes would have inconsistent tips.)
         disconnect_nodes(self.nodes[0], 2)
 
diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py
index d558de5fe1..a693b7e4bb 100755
--- a/test/functional/rpc_psbt.py
+++ b/test/functional/rpc_psbt.py
@@ -105,7 +105,7 @@ class PSBTTest(BitcoinTestFramework):
         signedtx = self.nodes[0].signrawtransactionwithwallet(rawtx['hex'])
         assert_raises_rpc_error(-22, "TX decode failed", self.nodes[0].converttopsbt, signedtx['hex'])
 
-        # Explicilty allow converting non-empty txs
+        # Explicitly allow converting non-empty txs
         new_psbt = self.nodes[0].converttopsbt(rawtx['hex'])
         self.nodes[0].decodepsbt(new_psbt)
 
diff --git a/test/functional/test_framework/blocktools.py b/test/functional/test_framework/blocktools.py
index 987ade4044..35004fb588 100644
--- a/test/functional/test_framework/blocktools.py
+++ b/test/functional/test_framework/blocktools.py
@@ -122,7 +122,7 @@ def create_tx_with_script(prevtx, n, script_sig=b"", *, amount, script_pub_key=C
     """Return one-input, one-output transaction object
        spending the prevtx's n-th output with the given amount.
 
-       Can optionally pass scriptPubKey and scriptSig, default is anyone-can-spend ouput.
+       Can optionally pass scriptPubKey and scriptSig, default is anyone-can-spend output.
     """
     tx = CTransaction()
     assert(n < len(prevtx.vout))
diff --git a/test/lint/lint-spelling.ignore-words.txt b/test/lint/lint-spelling.ignore-words.txt
new file mode 100644
index 0000000000..9a49f32271
--- /dev/null
+++ b/test/lint/lint-spelling.ignore-words.txt
@@ -0,0 +1,6 @@
+cas
+hights
+mor
+objext
+unselect
+useable
diff --git a/test/lint/lint-spelling.sh b/test/lint/lint-spelling.sh
new file mode 100755
index 0000000000..5d672698a7
--- /dev/null
+++ b/test/lint/lint-spelling.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2018 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+#
+# Warn in case of spelling errors.
+# Note: Will exit successfully regardless of spelling errors.
+
+export LC_ALL=C
+
+IGNORE_WORDS_FILE=test/lint/lint-spelling.ignore-words.txt
+if ! codespell --check-filenames --disable-colors --quiet-level=7 --ignore-words=${IGNORE_WORDS_FILE} $(git ls-files -- ":(exclude)build-aux/m4/" ":(exclude)contrib/seeds/*.txt" ":(exclude)depends/" ":(exclude)doc/release-notes/" ":(exclude)src/leveldb/" ":(exclude)src/qt/locale/" ":(exclude)src/secp256k1/" ":(exclude)src/univalue/"); then
+    echo "^ Warning: codespell identified likely spelling errors. Any false positives? Add them to the list of ignored words in ${IGNORE_WORDS_FILE}"
+fi