davids5 commented on issue #2: Master pr nxstyle improvments
URL: https://github.com/apache/incubator-nuttx/pull/2#issuecomment-568445894
 
 
   > Maybe we can use git pre-commit hook to ensure anyone run nxsytle before 
commit to his/her local working branch:
   > https://eing.github.io/technology/2016/01/28/Git-Pre-Commit-Hooks-Part1/
   > And we even can run make in pre-commit.sh to generate the nxsytle.
   
   Yes. I had sent it on the list at one point, Not sure what list....
   
   @xiaoxiang781216 - please consider [this 
issue](https://github.com/PX4/Firmware/issues/7125) and How it will effect us.
   
   .git/hooks/pre-commit
   ```
   #!/bin/sh
   #
   # Copyright (c) 2012 - 2019, PX4 Development Team
   # All rights reserved.
   #
   # Redistribution and use in source and binary forms, with or without
   # modification, are permitted provided that the following conditions are met:
   #
   # * Redistributions of source code must retain the above copyright notice, 
this
   #  list of conditions and the following disclaimer.
   # 
   # * Redistributions in binary form must reproduce the above copyright notice,
   #  this list of conditions and the following disclaimer in the documentation
   #   and/or other materials provided with the distribution.
   # 
   # * Neither the name of the copyright holder nor the names of its
   #   contributors may be used to endorse or promote products derived from
   #  this software without specific prior written permission.
   # 
   # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
ARE
   # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
LIABLE
   # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
LIABILITY,
   # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 
USE
   # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   # 
   #
   # An example hook script to verify what is about to be committed.
   # Called by "git commit" with no arguments.  The hook should
   # # exit with non-zero status after issuing an appropriate message if
   # it wants to stop the commit.
   #
   # To enable this hook, rename this file to "pre-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 you want to allow non-ascii filenames set this variable to true.
   allownonascii=$(git config hooks.allownonascii)
   
   # Redirect output to stderr.
   exec 1>&2
   
   # Cross platform projects tend to avoid non-ascii filenames; prevent
   # them from being added to the repository. We exploit the fact that the
   # printable range starts at the space character and ends with tilde.
   if [ "$allownonascii" != "true" ] &&
        # Note that the use of brackets around a tr range is ok here, (it's
        # even required, for portability to Solaris 10's /usr/bin/tr), since
        # the square bracket bytes happen to fall in the designated range.
        test $(git diff --cached --name-only --diff-filter=A -z $against |
          LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
   then
        echo "Error: Attempt to add a non-ascii file name."
        echo
        echo "This can cause problems if you want to work"
        echo "with people on other platforms."
        echo
        echo "To be portable it is advisable to rename the file ..."
        echo
        echo "If you know what you are doing you can disable this"
        echo "check using:"
        echo
        echo "  git config hooks.allownonascii true"
        echo
        exit 1
   fi
   
   # If there are whitespace errors, print the offending file names and fail.
   git diff-index --check --cached $against --
   if [ $? -ne 0 ]
   then
           exit 1
   fi
   
   # Check for code style, only in changed files
   for i in `git diff --cached --name-only --diff-filter=ACM`
   do
        echo $i:
           FILENAME=$(basename $i)
           FILE_EXT="${FILENAME#*.}"
        echo FILENAME=$FILENAME
        echo FILE_EXT=$FILE_EXT
           if [ "$FILE_EXT" = "c" ] || [ "$FILE_EXT" = "h" ]; then
                ./tools/nxstyle -m 80 $i 
        fi
        echo 
   done
   exec < /dev/tty
   while true; do
        read -p "[post-commit hook] Commit? (Y/n) " yn
        if [ "$yn" = "" ]; then
           yn='Y'
        fi
        case $yn in
              [Yy] ) exit 0; break;;
              [Nn] ) exit 1;;
              * ) echo "Please answer y or n for yes or no.";;
          esac
        done
   ```
   
   

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