From aebf6fa0b15bc2502e681e4608727d2784c47a54 Mon Sep 17 00:00:00 2001
From: Daniel Patterson <daniel@mapbox.com>
Date: Wed, 20 Jul 2016 21:10:07 +0200
Subject: [PATCH] [skip ci] Update format script to enforce clang-format
 version, and work on OSX

---
 scripts/format.sh | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/scripts/format.sh b/scripts/format.sh
index 561db8756..f95f8735a 100755
--- a/scripts/format.sh
+++ b/scripts/format.sh
@@ -7,8 +7,33 @@
 
 set -eu -o pipefail
 
+# Get CPU count
+OS=$(uname)
+NPROC=1
+if [[ $OS = "Linux" ]] ; then
+    NPROC=$(nproc)
+elif [[ ${OS} = "Darwin" ]] ; then
+    NPROC=$(sysctl -n hw.physicalcpu)
+fi
+
+# Discover clang-format
+if type clang-format-3.8 2> /dev/null ; then
+    CLANG_FORMAT=clang-format-3.8
+elif type clang-format 2> /dev/null ; then
+    # Clang format found, but need to check version
+    CLANG_FORMAT=clang-format
+    V=$(clang-format --version)
+    if [[ $V != *3.8* ]] ; then
+        echo "clang-format is not 3.8 (returned ${V})"
+        exit 1
+    fi
+else
+    echo "No appropriate clang-format found (expected clang-format-3.8, or clang-format)"
+    exit 1
+fi
+
 find src include unit_tests example -type f -name '*.hpp' -o -name '*.cpp' \
-  | xargs -I{} -P $(nproc) clang-format -i -style=file {}
+  | xargs -I{} -P ${NPROC} ${CLANG_FORMAT} -i -style=file {}
 
 
 dirty=$(git ls-files --modified)