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https://github.com/ben-grande/qusal.git
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67 lines
1.6 KiB
Bash
67 lines
1.6 KiB
Bash
#!/bin/sh
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# SPDX-FileCopyrightText: 2023 Benjamin Grande M. S. <ben.grande.b@gmail.com>
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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set -eu
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die(){
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echo "error: ${1}" >&2
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exit 1
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}
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if ! command -v git >/dev/null; then
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die "Command not found: git"
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fi
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untrusted_repo="${QREXEC_SERVICE_ARGUMENT}"
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if test -z "${untrusted_repo}"; then
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die "Repository name is empty"
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fi
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if ! (echo "${untrusted_repo}" | grep -q "^[A-Za-z0-9][A-Za-z0-9_.-]\+$")
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then
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die "Forbidden characters in repository name. Allowed chars: letters, numbers, hyphen, underscore and dot. It cannot begin with hyphen, underscore or dot"
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fi
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## Length arbitrarily set.
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if test "${#untrusted_repo}" -gt 128; then
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die "Repository name is too long: ${#untrusted_repo}"
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fi
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base_path="$HOME/src"
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repo="${untrusted_repo}"
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case "${repo}" in
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*".git") ;;
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*) repo="${repo}.git";;
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esac
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path="${base_path}/${repo}"
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action="${0##*.Git}"
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case "${action}" in
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Fetch) service=git-upload-pack;;
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Push) service=git-receive-pack;;
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Init) service="git init --bare";;
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*) die "Invalid RPC name: ${0##*/}";;
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esac
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if test "${action}" != "Init"; then
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test -d "${path}" || die "Directory doesn't exist: ${repo}"
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git -C "${path}" rev-parse >/dev/null 2>&1 || die "Not a git repository: ${repo}"
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is_bare="$(git -C "${path}" rev-parse --is-bare-repository)"
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test "${is_bare}" = "true" || die "Not a bare repository: ${repo}"
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fi
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if ! test -d "${base_path}"; then
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# shellcheck disable=SC2174
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mkdir -m 0700 -p "${base_path}" >/dev/null 2>&1 ||
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die "Cannot create directory: ${base_path}"
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fi
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# shellcheck disable=SC2086
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exec ${service} -- "${path}"
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