A git hook to prevent pushes with untracked source files

#!/bin/sh
 
#
# A hook script to verify that a push is not done with untracked source file
#
# To use it, either symlink this script to $your-git-clone/.git/hooks/pre-push
# or include it in your existing pre-push script.
#
 
# Perl-style regular expression which limits the files we interpret as source files.
# The default pattern here excludes CMakeLists.txt files and any .h/.cpp/.cmake files.
# Extend/adapt this to your needs. Alternatively, set the pattern in your repo via:
#     git config hooks.prepush.sourcepattern "$your-pattern"
pattern=$(git config --get hooks.prepush.sourcepattern)
if[-z"$pattern"]; then
pattern="(?:(?:^|/)CMakeLists\.txt|\.h|\.cpp|\.cmake)$"
fi
 
files=$(git status -u--porcelain--no-column | sed"s/^?? //" | grep-P"$pattern")
if[-z"$files"]; then
exit0
fi
 
echo
echo"ERROR: Preventing push with untracked source files:"
echo
echo"$files" | sed"s/^/    /"
echo
echo"Either include these files in your commits, add them to .gitignore"
echo"or stash them with git stash -u."
echo
exit1

# to show the current status, note the untracked bar file which is not included as a source file
$ git status
On branch master
Your branch is up-to-date with 'origin/master'.
 
Untracked files:
  (use "git add <file>..." to include in what will be committed)
 
        CMakeLists.txt
        bar
        foo/
 
nothing added to commit but untracked files present (use "git add" to track)
 
# now try to push something
 
$ git push
 
ERROR: Preventing push with untracked source files:
 
    CMakeLists.txt
    foo/asdf.h
 
Either include these files in your commits, add them to .gitignore
or stash them with git stash -u.
 
error: failed to push some refs to '/tmp/repo'