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#!/bin/bash
# Copyright 2017 Google
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Usage:
# ./scripts/style.sh [branch-name | filenames]
#
# With no arguments, formats all eligible files in the repo
# Pass a branch name to format all eligible files changed since that branch
# Pass a specific file or directory name to format just files found there
#
# Commonly
# ./scripts/style.sh master
# Strip the clang-format version output down to the major version. Examples:
# clang-format version 7.0.0 (tags/google/stable/2018-01-11)
# clang-format version google3-trunk (trunk r333779)
version=$(clang-format --version)
# Remove leading "clang-format version"
version="${version/*version /}"
# Remove trailing parenthetical version details
version="${version/ (*)/}"
# Remove everything after the first dot (note this is a glob, not a regex)
version="${version/.*/}"
case "$version" in
6 | 7)
# Allow an older clang-format to accommodate Travis version skew.
;;
google3-trunk)
echo "Please use a publicly released clang-format; a recent LLVM release"
echo "from http://releases.llvm.org/download.html will work."
echo "Prepend to PATH when running style.sh."
exit 1
;;
*)
echo "Please upgrade to clang-format version 7."
echo "If it's installed via homebrew you can run: brew upgrade clang-format"
exit 1
;;
esac
system=$(uname -s)
if [[ "$system" == "Darwin" ]]; then
version=$(swiftformat --version)
version="${version/*version /}"
# Allow an older swiftformat because travis isn't running High Sierra yet
# and the formula hasn't been updated in a while on Sierra :-/.
if [[ "$version" != "0.32.0" && "$version" != "0.33"* ]]; then
echo "Please upgrade to swiftformat 0.33.3"
echo "If it's installed via homebrew you can run: brew upgrade swiftformat"
exit 1
fi
fi
# Joins the given arguments with the separator given as the first argument.
function join() {
local IFS="$1"
shift
echo "$*"
}
clang_options=(-style=file)
# Rules to disable in swiftformat:
swift_disable=(
# sortedImports is broken, sorting into the middle of the copyright notice.
sortedImports
# Too many of our swift files have simplistic examples. While technically
# it's correct to remove the unused argument labels, it makes our examples
# look wrong.
unusedArguments
)
swift_options=(
# Mimic Objective-C style.
--indent 2
--disable $(join , "${swift_disable[@]}")
)
if [[ $# -gt 0 && "$1" == "test-only" ]]; then
test_only=true
clang_options+=(-output-replacements-xml)
swift_options+=(--dryrun)
shift
else
test_only=false
clang_options+=(-i)
fi
files=$(
(
if [[ $# -gt 0 ]]; then
if git rev-parse "$1" -- >& /dev/null; then
# Argument was a branch name show files changed since that branch
git diff --name-only --relative --diff-filter=ACMR "$1"
else
# Otherwise assume the passed things are files or directories
find "$@" -type f
fi
else
# Do everything by default
find . -type f
fi
) | sed -E -n '
# find . includes a leading "./" that git does not include
s%^./%%
# Build outputs
\%/Pods/% d
\%^build/% d
\%^Debug/% d
\%^Release/% d
# Sources controlled outside this tree
\%/third_party/% d
\%/Firestore/Port/% d
# Generated source
\%/Firestore/core/src/firebase/firestore/util/config.h% d
# Sources pulled in by travis bundler
\%/vendor/bundle/% d
# Sources within the tree that are not subject to formatting
\%^(Example|Firebase)/(Auth|AuthSamples|Database|Messaging)/% d
# Checked-in generated code
\%\.pb(objc|rpc)\.% d
\%\.pb\.% d
\%\.nanopb\.% d
# Format C-ish sources only
\%\.(h|m|mm|cc|swift)$% p
'
)
needs_formatting=false
for f in $files; do
if [[ "${f: -6}" == '.swift' ]]; then
if [[ "$system" == 'Darwin' ]]; then
swiftformat "${swift_options[@]}" "$f" 2> /dev/null | grep 'would have updated' > /dev/null
else
false
fi
else
clang-format "${clang_options[@]}" "$f" | grep "<replacement " > /dev/null
fi
if [[ "$test_only" == true && $? -ne 1 ]]; then
echo "$f needs formatting."
needs_formatting=true
fi
done
if [[ "$needs_formatting" == true ]]; then
echo "Proposed commit is not style compliant."
echo "Run scripts/style.sh and git add the result."
exit 1
fi
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