From e90bfa447904d9621782213ef87bd8592ec026fa Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Sun, 16 Jun 2019 22:21:32 -0400
Subject: ob_get_system_path(): Allow package-less platconf

---
diff --git a/NEWS b/NEWS
index 52a8a4d..15f910c 100644
--- a/NEWS
+++ b/NEWS
@@ -25,6 +25,8 @@ libopkbuild:
     added.
   * ob_set_source_substvar(), ob_set_binary_substvar(), and
     ob_substvars() are now covered by the test suite.
+  * ob_get_system_path() with the "platconf" path_id now accepts a
+    single "plat" argument.  The three-argument form is now deprecated.
 
 [1]: https://reproducible-builds.org/specs/source-date-epoch/
 
diff --git a/lib/metadata.sh b/lib/metadata.sh
index e3ed407..0597841 100644
--- a/lib/metadata.sh
+++ b/lib/metadata.sh
@@ -313,8 +313,9 @@ ob_plat_is_concerned()
 ##          \fIpath_id\fP.  The arguments for a \fIpath_id\fP of either
 ##          \fBpackage-source\fP or \fBpackage-docs\fP are \fIsource\fP and
 ##          \fIversion\fP.  For \fBbuildflags\fP the argument is \fI arch\fP. 
-##          For \fBplatconf\fP they are \fIsource\fP, \fIversion\fP, and
-##          \fIplat\fP.
+##          For \fBplatconf\fP they can be either only \fIplat\fP or all of
+##          \fIsource\fP, \fIversion\fP, and \fIplat\fP; the latter form is
+##          deprecated.
 ## @operand path_id req One of \fBpackage-source\fP, \fBpackage-docs\fP,
 ##                      \fBbuildflags\fP, or \fBplatconf\fP.
 ## @operand args    req Additional arguments specific to each \fIpath_id\fP.
diff --git a/lib/metadata/proteanos.sh b/lib/metadata/proteanos.sh
index 4cc982d..f007c22 100644
--- a/lib/metadata/proteanos.sh
+++ b/lib/metadata/proteanos.sh
@@ -139,8 +139,13 @@ _ob_get_system_path()
 			printf '%s/opkbuild/buildflags/%s' "${DATADIR}" "${1}"
 			;;
 		'platconf')
-			# source version plat
+			# [source version] plat
+			if [ ${#} -eq 1 ]; then
+				printf '%s/platconf/%s\n' "${DATADIR}" "${1}"
+				return 0
+			fi
 			[ ${#} -eq 3 ] || _ob_abort
+			# Deprecated:
 			ob_parse_version -u 'pkgver' -- "${2}"
 			printf '%s/platconf/%s/%s\n' "${DATADIR}" "${3}" "${1}"
 			printf '%s/platconf/%s/%s_%s\n' "${DATADIR}" \
--
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