From 06f8ae1a6b17414e00f51e3db495daa1b66a9c15 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Mon, 18 Mar 2019 16:30:48 -0400
Subject: ob_substvars(): Substitute binary package vars

---
diff --git a/lib/control.sh b/lib/control.sh
index 75a59d5..22ed8a5 100644
--- a/lib/control.sh
+++ b/lib/control.sh
@@ -255,14 +255,16 @@ ob_set_binary_substvar()
 ##          \fBob_set_source_substvar\fP(3) in a string.  The format for
 ##          variable substitutions is \fI${var}\fP, and substitutions can be
 ##          nested.
-## @operand string req The string in which to substitute variables.
+## @operand string  req The string in which to substitute variables.
+## @operand package req The binary package for which to substitute variables.
 ## @return Returns 0 on success or 1 on possible recursion.
 ## @stderr Prints a warning on possible recursion.
 ## @pure yes This function has no side effects.
 ob_substvars()
 {
 	local string="${1}"
-	shift 1 || _ob_abort
+	local package="${2}"
+	shift 2 || _ob_abort
 	local depth=
 	local lhs=
 	local name=
@@ -313,7 +315,18 @@ ob_substvars()
 			${name}
 			EOF
 			)"
-		value="$(eval "printf '%s' \"\${_OB_SUBSTVAR_SRC_${name}}\"")"
+		if eval "[ x\"\${_OB_SUBSTVAR_SRC_${name}:+set}\" = x'set' ]"
+		then
+			name="_OB_SUBSTVAR_SRC_${name}"
+		elif [ -n "${package}" ] && eval "[ x\"\${_OB_SUBSTVAR_BIN_$(: \
+				)${package}__${name}:+set}\" = x'set' ]"; then
+			name="_OB_SUBSTVAR_BIN_${package}__${name}"
+		else
+			_ob_warn_msg 'substvar_unknown' "${name}"
+			string="${lhs}${rhs}"
+			continue
+		fi
+		value="$(eval "printf '%s' \"\${${name}}\"")"
 		string="${lhs}${value}${rhs}"
 		depth=$((${depth} + 1))
 	done
diff --git a/locale/en_US/libopkbuild_2.sh b/locale/en_US/libopkbuild_2.sh
index 38f2063..275177e 100644
--- a/locale/en_US/libopkbuild_2.sh
+++ b/locale/en_US/libopkbuild_2.sh
@@ -37,6 +37,7 @@ msg_libopkbuild_2_list_item_separator=', '
 msg_libopkbuild_2_control_missing_fields='%s: missing fields: %s'
 msg_libopkbuild_2_substvar_deep_nesting='Possible recursion in substitutions'
 msg_libopkbuild_2_substvar_invalid='Invalid substitution variable "%s"'
+msg_libopkbuild_2_substvar_unknown='Unknown substitution variable "%s"'
 
 # lib/changelog.sh
 msg_libopkbuild_2_changelog_found_blank_line='%s: found blank line where expected %s'
diff --git a/src/ob-checkbuilddeps.sh b/src/ob-checkbuilddeps.sh
index 39d7e60..f75cf43 100644
--- a/src/ob-checkbuilddeps.sh
+++ b/src/ob-checkbuilddeps.sh
@@ -60,7 +60,7 @@ check_build_deps()
 	deps="$(ob_get_source_parameter 'Build-Depends')"
 	deps="$(ob_reduce_deps -a "${OPK_HOST_ARCH}" \
 		-p "${OPK_HOST_PLAT}" -- "${deps}")"
-	deps="$(ob_substvars "${deps}")"
+	deps="$(ob_substvars "${deps}" '')"
 
 	missing=''
 	IFS=','
diff --git a/src/ob-genchanges.sh b/src/ob-genchanges.sh
index f972002..9e8c75a 100644
--- a/src/ob-genchanges.sh
+++ b/src/ob-genchanges.sh
@@ -48,7 +48,7 @@ write_changes()
 		ob_set_package_substvars "${pkg}"
 		desc="$(ob_get_binary_parameter "${pkg}" 'Description' | \
 			head -n 1)"
-		desc="$(ob_substvars "${desc}")"
+		desc="$(ob_substvars "${desc}" "${pkg}")"
 		printf ' %s - %s\n' "${pkg}" "${desc}" >&3
 	done
 
diff --git a/src/ob-gencontrol.sh b/src/ob-gencontrol.sh
index e42ab60..c2eb61b 100644
--- a/src/ob-gencontrol.sh
+++ b/src/ob-gencontrol.sh
@@ -95,14 +95,16 @@ gen_control()
 						-a "${OPK_HOST_ARCH}" \
 						-p "${OPK_HOST_PLAT}" \
 						-- "${value}")"
-					value="$(ob_substvars "${value}")"
+					value="$(ob_substvars "${value}" \
+						"${binary}")"
 					;;
 				'Conflicts' | 'Provides' | 'Replaces')
 					value="$(ob_reduce_deps \
 						-a "${OPK_HOST_ARCH}" \
 						-p "${OPK_HOST_PLAT}" \
 						-u -- "${value}")"
-					value="$(ob_substvars "${value}")"
+					value="$(ob_substvars "${value}" \
+						"${binary}")"
 					;;
 			esac
 			printf '%s: %s\n' "${name}" "${value}" | \
@@ -222,7 +224,7 @@ main()
 			plat="$(ob_get_binary_parameter "${pkg}" 'Platform')"
 			[ x"${plat}" != x'all' ] && plat="${OPK_HOST_PLAT}"
 			desc="$(ob_get_binary_parameter "${pkg}" 'Description')"
-			desc="$(ob_substvars "${desc}")"
+			desc="$(ob_substvars "${desc}" "${pkg}")"
 			gen_control "${pkg}" "${OPK_BINARY_VERSION}" \
 				"${arch}" "${plat}" "${desc}" 'true'
 			install_maintainer_scripts "${pkg}"
--
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