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#!/bin/bash
set -e
if test "${#}" -ne 1; then
printf "%s\n" "usage: $(basename $0) https://url/repo"
exit 1
fi
REPO="${1}"
REPO_NAME=$(basename "${REPO}")
REPO_DIR="/srv/git/repos/${REPO_NAME}.git"
if test -d "${REPO_DIR}"; then
printf "%s\n" "[err] repository ${REPO_NAME}.git already exists at ${REPO_DIR}"
exit 1
fi
TMP_DIR=$(mktemp -d -p /tmp)
trap 'rm -rf "$TMP_DIR"' EXIT
printf "%s\n" "[inf] cloning upstream repo"
git clone --mirror --quiet "${REPO}" "${TMP_DIR}"
printf "%s\n" "[inf] creating bare fork repository"
mkdir -p "${REPO_DIR}"
git init --bare --quiet "${REPO_DIR}"
cat > "${REPO_DIR}/hooks/post-receive" << "EOL"
#!/bin/sh
agefile="$(git rev-parse --git-dir)"/info/web/last-modified
mkdir -p "$(dirname "$agefile")" &&
git for-each-ref \
--sort=-authordate --count=1 \
--format='%(authordate:iso8601)' \
>"$agefile"
EOL
chmod +x "${REPO_DIR}/hooks/post-receive"
printf "%s\n" "[inf] pushing to bare repo"
git --git-dir="${TMP_DIR}" push --mirror --quiet "${REPO_DIR}"
printf "%s\n" "[inf] configuring bare repo"
git --git-dir="${REPO_DIR}" config core.logallrefupdates true
git --git-dir="${REPO_DIR}" config cgit.section "03. mirrors"
git --git-dir="${REPO_DIR}" remote add upstream "${REPO}"
chown -R git:git "${REPO_DIR}"
chmod -R g-w "${REPO_DIR}"
printf "%s\n" "[inf] mirrored ${REPO}"
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