From 336cb4c6132f4f7d29b549d11984b7f407794f04 Mon Sep 17 00:00:00 2001
From: easy <g-easy@users.noreply.github.com>
Date: Tue, 17 Dec 2019 16:16:04 +1100
Subject: [PATCH 1/3] Add tools/format.sh which formats all files
 automatically.

Uses clang-format, cmake-format, and buildifier.
---
 tools/format.sh | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100755 tools/format.sh

diff --git a/tools/format.sh b/tools/format.sh
new file mode 100755
index 0000000000..c1883f0f60
--- /dev/null
+++ b/tools/format.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+if [[ ! -e tools/format.sh ]]; then
+  echo "This tool must be run from the topmost directory." >&2
+  exit 1
+fi
+
+set -e
+
+FIND="find . -name .git -prune -o -name _deps -prune -o -name .build -prune -o"
+
+# Correct common miscapitalizations.
+sed -i 's/Open[t]elemetry/OpenTelemetry/g' $($FIND -type f -print)
+# No CRLF line endings.
+sed -i 's/\r$//' $($FIND -type f -print)
+# No trailing spaces.
+sed -i 's/ \+$//' $($FIND -type f -print)
+
+CMD=clang-format-8
+$CMD -version
+$CMD -i -style=file \
+  $($FIND -name '*.cc' -print -o -name '*.h' -print)
+
+if which cmake-format >/dev/null; then
+  echo "Running cmake-format $(cmake-format --version 2>&1)."
+  cmake-format -i $($FIND -name 'CMakeLists.txt' -print)
+else
+  echo "Can't find cmake-format. It can be installed with:"
+  echo "  pip install --user cmake_format"
+fi
+
+if which buildifier >/dev/null; then
+  echo "Running buildifier."
+  buildifier $($FIND -name WORKSPACE -print -o -name BUILD -print -o \
+    -name '*.bzl' -print)
+else
+  echo "Can't find buildifier. It can be installed with:"
+  echo "  go get github.com/bazelbuild/buildtools/buildifier"
+fi

From 87c6fb9a6a6eddefca8bfd022272150bd17e0a19 Mon Sep 17 00:00:00 2001
From: easy <g-easy@users.noreply.github.com>
Date: Tue, 17 Dec 2019 17:51:36 +1100
Subject: [PATCH 2/3] sed on OSX expects -i (inplace) to take an argument.

---
 tools/format.sh | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/format.sh b/tools/format.sh
index c1883f0f60..cb1e6c20bb 100755
--- a/tools/format.sh
+++ b/tools/format.sh
@@ -8,12 +8,18 @@ set -e
 
 FIND="find . -name .git -prune -o -name _deps -prune -o -name .build -prune -o"
 
+# GNU syntax.
+SED=(sed -i)
+if [[ "$(uname)" = "Darwin" ]]; then
+  SED=(sed -i "")
+fi
+
 # Correct common miscapitalizations.
-sed -i 's/Open[t]elemetry/OpenTelemetry/g' $($FIND -type f -print)
+"${SED[@]}" 's/Open[t]elemetry/OpenTelemetry/g' $($FIND -type f -print)
 # No CRLF line endings.
-sed -i 's/\r$//' $($FIND -type f -print)
+"${SED[@]}" 's/\r$//' $($FIND -type f -print)
 # No trailing spaces.
-sed -i 's/ \+$//' $($FIND -type f -print)
+"${SED[@]}" 's/ \+$//' $($FIND -type f -print)
 
 CMD=clang-format-8
 $CMD -version

From e7939e6a537fd44cb08cf15ecc6a5e52f83f4ca2 Mon Sep 17 00:00:00 2001
From: easy <g-easy@users.noreply.github.com>
Date: Tue, 17 Dec 2019 17:54:50 +1100
Subject: [PATCH 3/3] Allow user to override $CLANG_FORMAT.

Also if clang-format-8 doesn't exist, fall back to clang-format.
---
 tools/format.sh | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/tools/format.sh b/tools/format.sh
index cb1e6c20bb..f06dc3cd04 100755
--- a/tools/format.sh
+++ b/tools/format.sh
@@ -21,9 +21,16 @@ fi
 # No trailing spaces.
 "${SED[@]}" 's/ \+$//' $($FIND -type f -print)
 
-CMD=clang-format-8
-$CMD -version
-$CMD -i -style=file \
+# If not overridden, try to use clang-format-8 or clang-format.
+if [[ -z "$CLANG_FORMAT" ]]; then
+  CLANG_FORMAT=clang-format
+  if which clang-format-8 >/dev/null; then
+    CLANG_FORMAT=clang-format-8
+  fi
+fi
+
+$CLANG_FORMAT -version
+$CLANG_FORMAT -i -style=file \
   $($FIND -name '*.cc' -print -o -name '*.h' -print)
 
 if which cmake-format >/dev/null; then