git-hooks: replace clang-format with ktlint in pre-commit

Author: vmiklos

git-hooks/pre-commit

@@ -1,142 +1,4 @@
-#!/bin/bash
-
-# git pre-commit hook that runs an clang-format stylecheck.
-# Features:
-#  - abort commit when commit does not comply with the style guidelines
-#  - create a patch of the proposed style changes
-
-# modifications for clang-format by rene.milk@wwu.de
-# This file is part of a set of unofficial pre-commit hooks available
-# at github.
-# Link:    https://github.com/githubbrowser/Pre-commit-hooks
-# Contact: David Martin, david.martin.mailbox@googlemail.com
-
-
-##################################################################
-# SETTINGS
-# set path to clang-format binary
-if [ -z "$CLANG_FORMAT" ]; then
-	CLANG_FORMAT=$(type -p clang-format)
-fi
-
-# remove any older patches from previous commits. Set to true or false.
-# DELETE_OLD_PATCHES=false
-DELETE_OLD_PATCHES=false
-
-# only parse files with the extensions in FILE_EXTS. Set to true or false.
-# if false every changed file in the commit will be parsed with clang-format.
-# if true only files matching one of the extensions are parsed with clang-format.
-# PARSE_EXTS=true
-PARSE_EXTS=true
-
-# file types to parse. Only effective when PARSE_EXTS is true.
-# FILE_EXTS=".c .h .cpp .hpp"
-FILE_EXTS=".c .h .cpp .hpp .cc .hh .cxx .hxx .m .java .js"
-
-##################################################################
-# There should be no need to change anything below this line.
-
-# Reference: http://stackoverflow.com/questions/1055671/how-can-i-get-the-behavior-of-gnus-readlink-f-on-a-mac
-canonicalize_filename () {
-    local target_file=$1
-    local physical_directory=""
-    local result=""
-
-    # Need to restore the working directory after work.
-    pushd `pwd` > /dev/null
-
-    cd "$(dirname "$target_file")"
-    target_file=`basename $target_file`
-
-    # Iterate down a (possible) chain of symlinks
-    while [ -L "$target_file" ]
-    do
-        target_file=$(readlink "$target_file")
-        cd "$(dirname "$target_file")"
-        target_file=$(basename "$target_file")
-    done
-
-    # Compute the canonicalized name by finding the physical path
-    # for the directory we're in and appending the target file.
-    physical_directory=`pwd -P`
-    result="$physical_directory"/"$target_file"
-
-    # restore the working directory after work.
-    popd > /dev/null
-
-    echo "$result"
-}
-
-# exit on error
-set -e
-
-# check whether the given file matches any of the set extensions
-matches_extension() {
-    local filename=$(basename "$1")
-    local extension=".${filename##*.}"
-    local ext
-
-    for ext in $FILE_EXTS; do [[ "$ext" == "$extension" ]] && return 0; done
-
-    return 1
-}
-
-# necessary check for initial commit
-if git rev-parse --verify HEAD >/dev/null 2>&1 ; then
-    against=HEAD
-else
-    # Initial commit: diff against an empty tree object
-    against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
-fi
-
-if [ ! -x "$CLANG_FORMAT" ] ; then
-    printf "Error: clang-format executable not found.\n"
-    printf "Set the correct path in $(canonicalize_filename "$0").\n"
-    exit 1
-fi
-
-# create a random filename to store our generated patch
-prefix="pre-commit-clang-format"
-suffix="$(date +%s)"
-patch="/tmp/$prefix-$suffix.patch"
-
-# clean up any older clang-format patches
-$DELETE_OLD_PATCHES && rm -f /tmp/$prefix*.patch
-
-# create one patch containing all changes to the files
-git diff-index --cached --diff-filter=ACMR --name-only $against -- | while read file;
-do
-    # ignore file if we do check for file extensions and the file
-    # does not match any of the extensions specified in $FILE_EXTS
-    if $PARSE_EXTS && ! matches_extension "$file"; then
-        continue;
-    fi
-
-    # clang-format our sourcefile, create a patch with diff and append it to our $patch
-    # The sed call is necessary to transform the patch from
-    #    --- $file timestamp
-    #    +++ - timestamp
-    # to both lines working on the same file and having a a/ and b/ prefix.
-    # Else it can not be applied with 'git apply'.
-    "$CLANG_FORMAT" -style=file "$file" | \
-        diff -u "$file" - | \
-        sed -e "1s|--- |--- a/|" -e "2s|+++ -|+++ b/$file|" >> "$patch"
-done
-
-# if no patch has been generated all is ok, clean up the file stub and exit
-if [ ! -s "$patch" ] ; then
-    rm -f "$patch"
-    exit 0
-fi
-
-# a patch has been created, notify the user and exit
-printf "\nThe following differences were found between the code to commit "
-printf "and the clang-format rules:\n\n"
-cat "$patch"
-
-printf "\nYou can apply these changes with:\n git apply $patch\n"
-printf "(may need to be called from the root directory of your repository)\n"
-printf "Aborting commit. Apply changes and commit again or skip checking with"
-printf " --no-verify (not recommended).\n"
-
-exit 1
+#!/bin/sh
+# https://github.com/shyiko/ktlint pre-commit hook
+git diff --name-only --cached --relative | grep '\.kt[s"]\?$' | xargs ktlint --android --relative .
+if [ $? -ne 0 ]; then exit 1; fi