Git-Hooks

Note

TODO: explain how to set them up on windows with cygwin.

If you want to execute a script (sh, python, ...) after a certain git action (see https://git-scm.com/docs/githooks), you can put an executeable file with the name of the git action in the ".git/hooks"-project directory.
For example - (re-)generate the protobuf files: ~/project/.git/hooks/post-checkout

#!/bin/sh

# $0 - this shell script
# $1 - previous HEAD reference (Hash)
# $2 - new HEAD reference (Hash)
# $3 - Flag:
#           file checkout   = 0
#           branch checkout = 1

NAOTH_MAKE_DIR="/path/to/NaoTHSoccer/Make/"

echo "Execute custom git hook (protobuf)!"

if test $3 = 1
then
    # see: http://stackoverflow.com/questions/4043609/getting-fatal-not-a-git-repository-when-using-post-update-hook-to-execut
    unset GIT_DIR
    cd $NAOTH_MAKE_DIR 1> /dev/null
    premake5 --protoc 1> /dev/null
    cd - 1> /dev/null
fi

~/project/.git/hooks/pre-commit

#!/bin/sh

# Reject any commit that would add a line with tabs.
#
# You can enable this as a repo policy with
#
#   git config hooks.allowtabs true

allowtabs=$(git config hooks.allowtabs)

if [ "$allowtabs" != "true" ] &&
   # we check only tabs that would be added by this commit
   git diff --cached '*.c' '*.h' '*.cpp' '*.hpp' | grep -E '^\+.*   '>/dev/null
then
   cat<<END;
[ERROR]: This commit adds TABS! Replace all tabs with spaces.
If you know what you are doing you can force this commit with:
  git commit --no-verify
Or change the repo policy like so:
  git config hooks.allowtabs true
Tabs in :
END

  # show all tabs
  #git grep -n --cached '   '

  # show only tabs that would be added in the commit
  git diff --cached '*.c' '*.h' '*.cpp' '*.hpp' | grep -E '^\+.*'
  exit 1
fi