From 81a3f1e5ffd4ce73297ab0756ed1231b926b5fc8 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Thu, 02 Aug 2012 00:13:03 -0400
Subject: Calculate installed size of packages.

---
diff --git a/lib/control.sh b/lib/control.sh
index e07b04d..6fa8931 100644
--- a/lib/control.sh
+++ b/lib/control.sh
@@ -72,7 +72,8 @@ oh_control_gen_source()
 	OH_CONTROL_BINARY_FIELD_RECOMMENDS="${OH_CONTROL_SOURCE_FIELD_BUILD_DEPENDS}"
 	OH_CONTROL_BINARY_FIELD_DESCRIPTION="${OH_SOURCE} source package"
 
-	_control_gen 'SOURCE' "src:${OH_SOURCE}.control/control"
+	_control_gen 'SOURCE' \
+		"src:${OH_SOURCE}.control/control" "src:${OH_SOURCE}.data"
 
 	OH_CONTROL_BINARY_FIELD_PACKAGE="${_old_package}"
 	OH_BINARY_VERSION="${_old_version}"
@@ -83,7 +84,8 @@ oh_control_gen_source()
 
 oh_control_gen_binary()
 {
-	_control_gen 'BINARY' "${1}.control/control"
+	_control_gen 'BINARY' \
+		"${1}.control/control" "${1}.data"
 }
 
 _control_parse()
@@ -179,9 +181,36 @@ _control_gen()
 {
 	_type="${1}"
 	_control="${2}"
+	_data="${2}"
 
 	# TODO: Handle platforms and architectures like "any" and "any-linux-any".
-	# TODO: Calculate installed size.
+
+	# Calculate installed size.
+	# Don't use du, since that considers the allocated size of files, symbolic
+	# links, and directories (i.e. actual file sizes plus the filesystem
+	# overhead on the build system).
+	# See the following for more information:
+	#   <http://pubs.opengroup.org/onlinepubs/9699919799/utilities/du.html>
+	#   <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=630533>
+	#   <https://www.gnu.org/software/coreutils/manual/html_node/du-invocation.html>
+	_sizes="$(find "${_data}" -type f -exec wc -c '{}' ';' | cut -d ' ' -f 1)"
+	_inst_size=0
+	for _size in ${_sizes}; do
+		_inst_size=$(($_inst_size + $_size))
+	done
+	# Convert bytes to kibibytes and round up.
+	# Note: There is an inconsistency between the Debian Policy Manual and opkg
+	# in the units of this field.  Debian Policy defines this field in units of
+	# kibibytes:
+	#   The disk space is given as the integer value of the estimated installed
+	#   size in bytes, divided by 1024 and rounded up.
+	# However, opkg apparently attempts to convert this value from bytes to
+	# kibibytes in its determination of whether the package's data will fit on
+	# the system:
+	#   pkg_size_kbs = (pkg->installed_size + 1023)/1024;
+	# TODO: Further investigate opkg's disk space calculation and, if necessary,
+	# patch opkg and submit a bug report.
+	_inst_size=$((($inst_size + 1023) / 1024))
 
 	cat >"${_control}" <<EOF
 Package: ${OH_CONTROL_BINARY_FIELD_PACKAGE}
--
cgit v0.9.1