From 8585983ef27e1ebad1edad0f6a9da818eb1c2422 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 29 Aug 2014 10:31:37 -0400
Subject: build: Parse and install build dependencies

---
(limited to 'lib')

diff --git a/lib/cmd/build.sh b/lib/cmd/build.sh
index 4a33b2d..33b7e97 100644
--- a/lib/cmd/build.sh
+++ b/lib/cmd/build.sh
@@ -21,6 +21,9 @@
 use profile
 use chroot
 use rand
+use control
+
+cmd_build_deps=
 
 cmd_build_main()
 {
@@ -70,13 +73,20 @@ cmd_build_main()
 			;;
 	esac
 
-	cmd_build_make_deps_pkg "${root}${dir}" "${rand_x}"
+	cmd_build_get_deps "${root}${dir}/pkg"
+	if [ "x${cmd_build_deps}" != 'x' ]; then
+		cmd_build_make_deps_pkg "${root}${dir}" "${rand_x}"
+	fi
 
 	chroot_exec "${root}" sh <<-EOF
 		cd '${dir}/pkg'
-		opkg install ../builddeps.opk
+		if [ 'x${cmd_build_deps}' != 'x' ]; then
+			opkg install ../builddeps.opk
+		fi
 		opkbuild ${@}
-		opkg remove prokit-builddeps-${rand_x}
+		if [ 'x${cmd_build_deps}' != 'x' ]; then
+			opkg remove prokit-builddeps-${rand_x}
+		fi
 		EOF
 
 	case "${uname_s}" in
@@ -92,6 +102,29 @@ cmd_build_main()
 	rmdir "${root}${dir}"
 }
 
+cmd_build_get_deps()
+{
+	local pkg_dir="${1}"
+
+	cmd_build_deps=''
+	parse_control "${pkg_dir}/control" cmd_build_deps_field_cb false ''
+}
+
+cmd_build_deps_field_cb()
+{
+	local name="${1}"
+	local value="${2}"
+
+	name="$(printf '%s\n' "${name}" | tr 'A-Z' 'a-z')"
+
+	if [ "x${name}" = 'xbuild-depends' ]; then
+		cmd_build_deps="${value}"
+		return 1
+	fi
+
+	return 0
+}
+
 cmd_build_make_deps_pkg()
 {
 	local build_dir="${1}"
@@ -104,6 +137,7 @@ cmd_build_make_deps_pkg()
 		Version: 1.0
 		Architecture: all
 		Platform: all
+		Depends: ${cmd_build_deps}
 		Description: Build dependencies metapackage generated by prokit
 		EOF
 	(cd "${build_dir}/builddeps/data"; tar -czf ../data.tar.gz .)
--
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