Skip to content

Instantly share code, notes, and snippets.

@LordGaav
Created June 19, 2012 11:59
Show Gist options
  • Star 4 You must be signed in to star a gist
  • Fork 2 You must be signed in to fork a gist
  • Save LordGaav/2953751 to your computer and use it in GitHub Desktop.
Save LordGaav/2953751 to your computer and use it in GitHub Desktop.
Git hook that determines the author based on the email address in a SSH key. Doesn't work because Git doesn't check the config between pre-commit and commit.
#!/bin/sh
# Retrieve author information as Git sees it while commiting
AUTHORINFO=$(git var GIT_AUTHOR_IDENT) || exit 1
NAME=$(printf '%s\n' "${AUTHORINFO}" | sed -n 's/^\(.*\) <.*$/\1/p')
EMAIL=$(printf '%s\n' "${AUTHORINFO}" | sed -n 's/^.* <\(.*\)> .*$/\1/p')
printf "AUTHORINFO: %s\n" "${AUTHORINFO}"
printf "NAME: %s\n" "${NAME}"
printf "EMAIL: %s\n" "${EMAIL}"
# Retrieve author information of the Repo user
REPONAME=$(git config --get repouser.name)
REPOEMAIL=$(git config --get repouser.email)
printf "REPONAME: %s\n" "${REPONAME}"
printf "REPOEMAIL: %s\n" "${REPOEMAIL}"
# If the current configured user is not the Repo user
if [ "${NAME}" != "${REPONAME}" ] || [ "${EMAIL}" != "${REPOEMAIL}" ]; then
# Reset the Repo user
git config user.name "${REPONAME}"
git config user.email "${REPOEMAIL}"
echo "Config reset!"
fi
#!/bin/sh
# Retrieve author information as Git sees it while commiting
AUTHORINFO=$(git var GIT_AUTHOR_IDENT) || exit 1
NAME=$(printf '%s\n\n' "${AUTHORINFO}" | sed -n 's/^\(.*\) <.*$/\1/p')
EMAIL=$(printf '%s\n\n' "${AUTHORINFO}" | sed -n 's/^.* <\(.*\)> .*$/\1/p')
printf "AUTHORINFO: %s\n" "${AUTHORINFO}"
printf "NAME: %s\n" "${NAME}"
printf "EMAIL: %s\n" "${EMAIL}"
# Retrieve author information of the Repo user
REPONAME=$(git config --get repouser.name)
REPOEMAIL=$(git config --get repouser.email)
printf "REPONAME: %s\n" "${REPONAME}"
printf "REPOEMAIL: %s\n" "${REPOEMAIL}"
# If we're trying to commit as the Repo user
#if [ "${NAME}" = "${REPONAME}" ] || [ "${EMAIL}" = "${REPOEMAIL}" ]; then
while [ 1 ]; do
# Check if we can access the SSH key and derive a previous committer from that
SSHUSER=$(ssh-add -l 2>/dev/null| cut -d" " -f3 | cut -d"@" -f1 | cut -d"+" -f1)
GITCOMMIT=$(git rev-list --all -i --author=${SSHUSER} | head -n1)
printf "SSHUSER: %s\n" "${SSHUSER}"
printf "GITCOMMIT: %s\n" "${GITCOMMIT}"
if [ -z "$SSHUSER" ] || [ -z "$GITCOMMIT" ]; then
echo "Could not determine Git user from SSH key"
break;
fi
GITUSER=$(git show -s --pretty=format:%aN ${GITCOMMIT})
GITEMAIL=$(git show -s --pretty=format:%aE ${GITCOMMIT})
printf "GITUSER: %s\n" "${GITUSER}"
printf "GITEMAIL: %s\n" "${GITEMAIL}"
if [ -z "$GITUSER" ] || [ -z "$GITEMAIL" ]; then
echo "Could not read previous Git commit for SSH user ${SSHUSER}"
break;
fi
# Set the found values
# Note that the post-commit hook will reset these config options
# to the Repo user after committing
git config user.name "${GITUSER}"
git config user.email "${GITEMAIL}"
echo "Config set!"
exit 0
done
echo "Fail!"
# If all fails, show error message with solution
cat <<EOF >&2
Please commit under your own name and email instead of "${NAME} <${EMAIL}>":
GIT_AUTHOR_NAME="Your Name" GIT_AUTHOR_EMAIL="your.name@email.com" git commit
EOF
exit 2
#fi
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment