Merge #11878: Add Travis check for duplicate includes

c36b720 Add Travis check for duplicate includes (practicalswift)
280023f Remove duplicate includes (practicalswift)

Pull request description:

  This enforces parts of the project header include guidelines (added by @sipa in #10575).

  Example run:

  ```
  $ git diff
  diff --git a/src/warnings.cpp b/src/warnings.cpp
  index c52a1fd..d8994dd 100644
  --- a/src/warnings.cpp
  +++ b/src/warnings.cpp
  @@ -5,6 +5,8 @@

   #include <sync.h>
   #include <clientversion.h>
  +#include <string>
   #include <util.h>
   #include <warnings.h>
  +#include <util.h>

  diff --git a/src/warnings.h b/src/warnings.h
  index e8e982c..8d2252e 100644
  --- a/src/warnings.h
  +++ b/src/warnings.h
  @@ -7,6 +7,7 @@
   #define BITCOIN_WARNINGS_H

   #include <stdlib.h>
   #include <string>
  +#include <stdlib.h>

   void SetMiscWarning(const std::string& strWarning);
  $ contrib/devtools/lint-includes.sh
  Duplicate include(s) in src/warnings.h:
  #include <stdlib.h>

  Include(s) from src/warnings.h duplicated in src/warnings.cpp:
  #include <string>

  Duplicate include(s) in src/warnings.cpp:
  #include <util.h>
  $ echo $?
  1
  $ git checkout .
  $ contrib/devtools/lint-includes.sh
  $ echo $?
  0
  ```

Tree-SHA512: f653d23c58ebc024dfc5b1fb8570698fd3c515c75b60b5cabbc43595548c488fca92349fa4c8b64460edbe61c879ff1d24f37f959e18552e202a7342460ddbf1

Author: MarcoFalke

contrib/devtools/lint-includes.sh

@@ -0,0 +1,43 @@
+#!/bin/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.
+#
+# Check for duplicate includes.
+
+filter_suffix() {
+    git ls-files | grep -E "^src/.*\.${1}"'$' | grep -Ev "/(leveldb|secp256k1|univalue)/"
+}
+
+EXIT_CODE=0
+for HEADER_FILE in $(filter_suffix h); do
+    DUPLICATE_INCLUDES_IN_HEADER_FILE=$(grep -E "^#include " < "${HEADER_FILE}" | sort | uniq -d)
+    if [[ ${DUPLICATE_INCLUDES_IN_HEADER_FILE} != "" ]]; then
+        echo "Duplicate include(s) in ${HEADER_FILE}:"
+        echo "${DUPLICATE_INCLUDES_IN_HEADER_FILE}"
+        echo
+        EXIT_CODE=1
+    fi
+    CPP_FILE=${HEADER_FILE/%\.h/.cpp}
+    if [[ ! -e $CPP_FILE ]]; then
+        continue
+    fi
+    DUPLICATE_INCLUDES_IN_HEADER_AND_CPP_FILES=$(grep -hE "^#include " <(sort -u < "${HEADER_FILE}") <(sort -u < "${CPP_FILE}") | grep -E "^#include " | sort | uniq -d)
+    if [[ ${DUPLICATE_INCLUDES_IN_HEADER_AND_CPP_FILES} != "" ]]; then
+        echo "Include(s) from ${HEADER_FILE} duplicated in ${CPP_FILE}:"
+        echo "${DUPLICATE_INCLUDES_IN_HEADER_AND_CPP_FILES}"
+        echo
+        EXIT_CODE=1
+    fi
+done
+for CPP_FILE in $(filter_suffix cpp); do
+    DUPLICATE_INCLUDES_IN_CPP_FILE=$(grep -E "^#include " < "${CPP_FILE}" | sort | uniq -d)
+    if [[ ${DUPLICATE_INCLUDES_IN_CPP_FILE} != "" ]]; then
+        echo "Duplicate include(s) in ${CPP_FILE}:"
+        echo "${DUPLICATE_INCLUDES_IN_CPP_FILE}"
+        echo
+        EXIT_CODE=1
+    fi
+done
+exit ${EXIT_CODE}

src/chainparams.cpp

@@ -11,7 +11,6 @@
 #include <utilstrencodings.h>
 
 #include <assert.h>
-#include <memory>
 
 #include <chainparamsseeds.h>
 

src/chainparamsbase.cpp

@@ -9,7 +9,6 @@
 #include <util.h>
 
 #include <assert.h>
-#include <memory>
 
 const std::string CBaseChainParams::MAIN = "main";
 const std::string CBaseChainParams::TESTNET = "test";

src/init.cpp

@@ -47,7 +47,6 @@
 #include <walletinitinterface.h>
 #include <stdint.h>
 #include <stdio.h>
-#include <memory>
 
 #ifndef WIN32
 #include <signal.h>

src/interfaces/handler.cpp

@@ -7,7 +7,6 @@
 #include <util.h>
 
 #include <boost/signals2/connection.hpp>
-#include <memory>
 #include <utility>
 
 namespace interfaces {

src/interfaces/wallet.cpp

@@ -22,8 +22,6 @@
 #include <wallet/feebumper.h>
 #include <wallet/wallet.h>
 
-#include <memory>
-
 namespace interfaces {
 namespace {
 

src/miner.cpp

@@ -27,7 +27,6 @@
 #include <validationinterface.h>
 
 #include <algorithm>
-#include <memory>
 #include <queue>
 #include <utility>
 

src/net.cpp

@@ -20,7 +20,6 @@
 #include <ui_interface.h>
 #include <utilstrencodings.h>
 
-#include <memory>
 #ifdef WIN32
 #include <string.h>
 #else

src/qt/paymentrequestplus.cpp

@@ -9,7 +9,6 @@
 
 #include <qt/paymentrequestplus.h>
 
-#include <script/script.h>
 #include <util.h>
 
 #include <stdexcept>

src/random.cpp

@@ -15,7 +15,6 @@
 #include <utilstrencodings.h> // for GetTime()
 
 #include <stdlib.h>
-#include <limits>
 #include <chrono>
 #include <thread>