From 15604bd2acdd5b3106c9da054b201fce669514c2 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Tue, 23 Jul 2013 20:57:58 -0400
Subject: lib/db.sh: New file.

---
diff --git a/lib/db.sh b/lib/db.sh
new file mode 100644
index 0000000..caeb0da
--- /dev/null
+++ b/lib/db.sh
@@ -0,0 +1,247 @@
+# pro-archman
+# lib/db.sh
+# Functions for querying and modifying the database
+#
+# Copyright (C) 2013  Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use dir
+
+#
+# Functions for the suites indices
+#
+
+db_get_srcver()
+{
+	local chan="${1}"
+	local dist="${2}"
+	local source="${3}"
+	local dir=
+
+	dir="${archive}/feeds/${chan}/${dist}/.db"
+	dir="${dir}/$(hash_name "${source}")/${source}"
+	if [ -f "${dir}/srcver" ]; then
+		cat "${dir}/srcver"
+	fi
+
+	return 0
+}
+
+db_set_srcver()
+{
+	local chan="${1}"
+	local dist="${2}"
+	local source="${3}"
+	local srcver="${4}"
+	local dir=
+
+	dir="${archive}/feeds/${chan}/${dist}/.db"
+	dir="${dir}/$(hash_name "${source}")/${source}"
+	mkdir -p "${dir}"
+	printf '%s\n' "${srcver}" >"${dir}/srcver"
+
+	return 0
+}
+
+db_del_srcver()
+{
+	local chan="${1}"
+	local dist="${2}"
+	local source="${3}"
+	local dir=
+
+	dir="${archive}/feeds/${chan}/${dist}/.db"
+	dir="${dir}/$(hash_name "${source}")/${source}"
+	rm -f "${dir}/srcver"
+	# Remove ".../.db/<hash>/<source>".
+	rmdir "${dir}"
+	# Try to remove ".../.db/<hash>" and ".../.db".
+	for dir in "${dir%/*}" "${dir%/*/*}"; do
+		try_rmdir "${dir}" || break
+	done
+
+	return 0
+}
+
+db_get_binver()
+{
+	local chan="${1}"
+	local dist="${2}"
+	local plat="${3}"
+	local arch="${4}"
+	local source="${5}"
+	local dir=
+
+	dir="${archive}/feeds/${chan}/${dist}/.db"
+	dir="${dir}/$(hash_name "${source}")/${source}/${plat}_${arch}"
+	if [ -f "${dir}/binver" ]; then
+		cat "${dir}/binver"
+	fi
+
+	return 0
+}
+
+db_set_binver()
+{
+	local chan="${1}"
+	local dist="${2}"
+	local plat="${3}"
+	local arch="${4}"
+	local source="${5}"
+	local binver="${6}"
+	local dir=
+
+	dir="${archive}/feeds/${chan}/${dist}/.db"
+	dir="${dir}/$(hash_name "${source}")/${source}/${plat}_${arch}"
+	mkdir -p "${dir}"
+	printf '%s\n' "${binver}" >"${dir}/binver"
+
+	return 0
+}
+
+db_del_binver()
+{
+	local chan="${1}"
+	local dist="${2}"
+	local plat="${3}"
+	local arch="${4}"
+	local source="${5}"
+	local dir=
+
+	dir="${archive}/feeds/${chan}/${dist}/.db"
+	dir="${dir}/$(hash_name "${source}")/${source}/${plat}_${arch}"
+	rm -f "${dir}/binver"
+	# Remove ".../.db/<hash>/<source>/<plat>_<arch>".
+	rmdir "${dir}"
+
+	return 0
+}
+
+db_get_archplats()
+{
+	local chan="${1}"
+	local dist="${2}"
+	local source="${3}"
+	local dir=
+
+	dir="${archive}/feeds/${chan}/${dist}/.db"
+	dir="${dir}/$(hash_name "${source}")/${source}"
+	for dir in "${dir}/"*_*/; do
+		dir="${dir%/}"
+		dir="${dir##*/}"
+		printf '%s %s\n' "${dir%%_*}" "${dir#*_}"
+	done
+
+	return 0
+}
+
+#
+# Functions for the pool indices
+#
+
+db_get_packages()
+{
+	local plat="${1}"
+	local arch="${2}"
+	local source="${3}"
+	local binver="${4}"
+	local dir=
+
+	dir="${archive}/pool/$(hash_name "${source}")/${source}/.db"
+	dir="${dir}/${binver}_${arch}_${plat}"
+	if [ -f "${dir}/packages" ]; then
+		cat "${dir}/packages"
+	fi
+
+	return 0
+}
+
+db_add_package()
+{
+	local plat="${1}"
+	local arch="${2}"
+	local source="${3}"
+	local binver="${4}"
+	local sect="${5}"
+	local pkg="${6}"
+	local dir=
+
+	dir="${archive}/pool/$(hash_name "${source}")/${source}/.db"
+	dir="${dir}/${binver}_${arch}_${plat}"
+	printf '%s %s\n' "${sect}" "${pkg}" >>"${dir}/packages"
+
+	return 0
+}
+
+db_del_packages()
+{
+	local plat="${1}"
+	local arch="${2}"
+	local source="${3}"
+	local binver="${4}"
+	local dir=
+
+	dir="${archive}/pool/$(hash_name "${source}")/${source}/.db"
+	dir="${dir}/${binver}_${arch}_${plat}"
+	rm -f "${dir}/packages"
+	# Remove "pool/<hash>/<source>/.db/<binver>_<arch>_<plat>".
+	rmdir "${dir}"
+	# Try to remove "pool/<hash>/<source>/.db".
+	try_rmdir "${dir%/*}"
+
+	return 0
+}
+
+db_inc_references()
+{
+	local plat="${1}"
+	local arch="${2}"
+	local source="${3}"
+	local binver="${4}"
+	local dir=
+	local refs=
+
+	dir="${archive}/pool/$(hash_name "${source}")/${source}/.db"
+	dir="${dir}/${binver}_${arch}_${plat}"
+	refs="$(cat "${dir}/references")"
+	refs=$(($refs + 1))
+	printf '%d\n' "${refs}" >"${dir}/references"
+	printf '%d\n' "${refs}"
+
+	return 0
+}
+
+db_dec_references()
+{
+	local plat="${1}"
+	local arch="${2}"
+	local source="${3}"
+	local binver="${4}"
+	local dir=
+	local refs=
+
+	dir="${archive}/pool/$(hash_name "${source}")/${source}/.db"
+	dir="${dir}/${binver}_${arch}_${plat}"
+	refs="$(cat "${dir}/references")"
+	refs=$(($refs - 1))
+	if [ ${refs} -eq 0 ]; then
+		rm -f "${dir}/references"
+	else
+		printf '%d\n' "${refs}" >"${dir}/references"
+	fi
+	printf '%d\n' "${refs}"
+
+	return 0
+}
--
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