From a2bd6deb12c0052f2716ecb8b86d471415b172d0 Mon Sep 17 00:00:00 2001
From: mj-xmr <mjxmr@protonmail.com>
Date: Fri, 6 Nov 2020 17:45:32 +0100
Subject: [PATCH] Clang IWYU header checker script

Run with utils/health/clang-include-what-you-use-run.sh
---
 utils/health/README.md                        |  4 +
 .../health/clang-include-what-you-use-run.sh  | 75 +++++++++++++++++++
 2 files changed, 79 insertions(+)
 create mode 100755 utils/health/clang-include-what-you-use-run.sh

diff --git a/utils/health/README.md b/utils/health/README.md
index dea46280e..8fadd3908 100644
--- a/utils/health/README.md
+++ b/utils/health/README.md
@@ -15,6 +15,10 @@ On the first run, the script will complain about the missing ClangBuildAnalyzer
 `utils/health/clang-tidy-run.sh`
 Performs Lint checks on the source code and stores the result in the build directory. More information on the [home page](https://clang.llvm.org/extra/clang-tidy/).
 
+##include-what-you-use
+`utils/health/clang-include-what-you-use-run.sh`
+Analyses the header file hierarchy and delivers hints on how to reduce their complexity. More information on the [home page](https://include-what-you-use.org/).
+
 
 ##Valgrind checks
 `utils/health/valgrind-tests.sh`
diff --git a/utils/health/clang-include-what-you-use-run.sh b/utils/health/clang-include-what-you-use-run.sh
new file mode 100755
index 000000000..655a188bd
--- /dev/null
+++ b/utils/health/clang-include-what-you-use-run.sh
@@ -0,0 +1,75 @@
+#!/bin/bash -e
+
+# Copyright (c) 2014-2020, The Monero Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Include What You Use analyses the complexity of your header hierarchy and proposes optimisations.
+# User documentation:
+# https://github.com/include-what-you-use/include-what-you-use/blob/master/README.md
+
+# Build variables
+PROG="include-what-you-use"
+PROG_SHORT="iwyu"
+DIR_BUILD="build/clang-$PROG_SHORT"
+
+RESULT="$PROG_SHORT-result.txt"
+
+if hash "$PROG"; then
+	echo "Found: $PROG"
+else
+	echo "Couldn't find: $PROG"
+	echo "Please run the below command to install $PROG:"
+	echo "sudo apt install $PROG_SHORT"
+	exit 1
+fi
+
+mkdir -p "$DIR_BUILD" && cd "$DIR_BUILD"
+rm `find . -name "CMakeCache.txt"` || true
+
+UWYU_COMMAND="$PROG;-Xiwyu;any;-Xiwyu;iwyu;-Xiwyu;args" # Copy-pasted from the user docs.
+	
+cmake ../.. \
+-DCMAKE_C_COMPILER=clang \
+-DCMAKE_CXX_COMPILER=clang++ \
+-DUSE_CCACHE=ON \
+-DCMAKE_C_INCLUDE_WHAT_YOU_USE="$UWYU_COMMAND" \
+-DCMAKE_CXX_INCLUDE_WHAT_YOU_USE="$UWYU_COMMAND" \
+-DBUILD_SHARED_LIBS=ON \
+-DBUILD_TESTS=ON
+
+make clean					# Clean up to generate the full report
+time make -k 2>&1 | tee "$RESULT"		# Run the scan. -k means: ignore errors
+#time make -k easylogging 2>&1 | tee $RESULT	# Quick testing: build a single target
+KPI=$(cat "$RESULT" | wc -l)
+tar -cJvf "$RESULT.txz" "$RESULT"		# Zip the result, because it's huge.
+rm -v "$RESULT"
+
+echo ""
+echo "Readable result stored in: $DIR_BUILD/$RESULT.gz"
+
+echo "$KPI" > "kpis.txt"