From 436187efa55385c2bec80981d255566d5083c9e8 Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fl.fischer@fau.de>
Date: Mon, 4 May 2020 11:10:26 +0200
Subject: copy speedymalloc's build system

Thanks to Florian Schmaus for most of the work.
---
 .clang-format      |  5 +++++
 .clang-tidy        |  2 ++
 Makefile           | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tools/check-format | 26 +++++++++++++++++++++++++
 4 files changed, 90 insertions(+)
 create mode 100644 .clang-format
 create mode 100644 .clang-tidy
 create mode 100644 Makefile
 create mode 100755 tools/check-format

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..9b8d6a4
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,5 @@
+---
+BasedOnStyle:  LLVM
+ColumnLimit:     100
+TabWidth: 2
+UseTab: Always
diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..36ac2ed
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,2 @@
+Checks: bugprone-*, cert-*, linuxkernel-*, modernize-*, performance-*, portability-*, readability-*,-readability-isolate-declaration
+WarningsAsErrors: clang-*, readability-*, performance-*
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1def4c2
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,57 @@
+SHELL=bash
+
+# https://stackoverflow.com/a/39124162/194894
+word-dot = $(word $2,$(subst ., ,$1))
+
+MESON_VERSION=$(shell meson --version)
+MESON_MAJOR_VERSION=$(call word-dot, $(MESON_VERSION), 1)
+MESON_MINOR_VERSION=$(call word-dot, $(MESON_VERSION), 2)
+
+.PHONY: all build builddir check check-format clean debug format release
+
+all: release
+
+BUILDTYPE ?= debugoptimized
+BUILDDIR := build-$(BUILDTYPE)
+
+release:
+	$(MAKE) build BUILDTYPE=$@
+
+debug:
+	$(MAKE) build BUILDTYPE=$@
+
+build: builddir
+	ninja -C $(BUILDDIR)
+
+builddir:
+	[[ -d $(BUILDDIR) ]] || mkdir $(BUILDDIR)
+	[[ -d build && $(shell realpath $(BUILDDIR)) == $(shell realpath build) ]] || ( \
+		rm -f build && \
+		ln -rs $(BUILDDIR) build && \
+		meson --buildtype=$(BUILDTYPE) $(BUILDDIR) \
+	)
+
+
+CHECK_NINJA_TARGETS += test
+
+# Meson >= 0.52 will automatically generate a clang-tidy target if a
+# .clang-tidy file is found.
+# Source version check: https://stackoverflow.com/a/3732456/194894
+ifeq ($(shell [ $(MESON_MINOR_VERSION) -ge 52 ] && echo true), true)
+CHECK_NINJA_TARGETS += clang-tidy
+else
+$(warning old mesion version $(MESON_VERSION) detected, meson >= 0.52 required for clang-tidy)
+endif
+
+check: all check-format
+	ninja -C build $(CHECK_NINJA_TARGETS)
+
+format: all
+	ninja -C build clang-format
+
+check-format:
+	./tools/check-format
+
+clean:
+	rm -rf build
+	rm -rf build-*
diff --git a/tools/check-format b/tools/check-format
new file mode 100755
index 0000000..414ddc4
--- /dev/null
+++ b/tools/check-format
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Pretty fancy method to get reliable the absolute path of a shell
+# script, *even if it is sourced*. Credits go to GreenFox on
+# stackoverflow: http://stackoverflow.com/a/12197518/194894
+pushd . > /dev/null
+SCRIPTDIR="${BASH_SOURCE[0]}";
+while([ -h "${SCRIPTDIR}" ]); do
+    cd "`dirname "${SCRIPTDIR}"`"
+    SCRIPTDIR="$(readlink "`basename "${SCRIPTDIR}"`")";
+done
+cd "`dirname "${SCRIPTDIR}"`" > /dev/null
+SCRIPTDIR="`pwd`";
+popd  > /dev/null
+
+ROOTDIR=$(readlink -f "${SCRIPTDIR}/..")
+
+MAX_PROCS=$(nproc)
+
+# Note that the --dry-run and --Werror clang-format arguments require
+# clang-format 10 or higher. See https://reviews.llvm.org/D68554
+find "${ROOTDIR}" -path "${ROOTDIR}/build*" -prune -o \
+	-type f -name '*.[c|h|cpp]' -print0 |\
+	xargs --null --max-args=3 --max-procs="${MAX_PROCS}" \
+		  clang-format --style=file --dry-run -Werror
-- 
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