clang-format files recursively

cl-fmt.sh

#!/usr/bin/env bash

set -e

# Variable that will hold the name of the clang-format command
FMT=""

# Some distros just call it clang-format. Others (e.g. Ubuntu) are insistent
# that the version number be part of the command. We prefer clang-format if
# that's present, otherwise we work backwards from highest version to lowest
# version.
for clangfmt in clang-format{,-{4,3}.{9,8,7,6,5,4,3,2,1,0}}; do
    if which "$clangfmt" &>/dev/null; then
        FMT="$clangfmt"
        break
    fi
done

# Check if we found a working clang-format
if [ -z "$FMT" ]; then
    echo "failed to find clang-format"
    exit 1
fi

function format_file() {
    file_path=${1}
    echo "format ${file_path}";
    ${FMT} -style=file -i "${file_path}"
}

function format_dir() {
    oldIFS=$IFS
    IFS=$'\n'

    for f in $(find $@ -type d \
                       -not \( -path */Carthage -prune \) \
                       -not \( -path */Pods -prune \) \
                       -not \( -path */.swiftpm -prune \) \
                       -not \( -path *.framework -prune \) \
                       -not \( -path *.xcframework -prune \) \
                       -name '*.pch' -or \
                       -name '*.h' -or \
                       -name '*.m' -or \
                       -name '*.mm' -or \
                       -name '*.c' -or \
                       -name '*.cc' -or \
                       -name '*.cpp'); do
        format_file "${f}";
    done

    IFS=$oldIFS

    echo "~~~ $@ Done ~~~";
}

# Check all of the arguments first to make sure they're all directories
for x in $@; do
    if [ -f "${x}" ]; then
        format_file "${x}"
    elif [ -d "${x}" ]; then
        format_dir "${x}";
    else
        echo "Invalid path: ${x}"
    fi
done