From c9d63b387c6124bdcd029251118b3d1e0c88a031 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sun, 2 Jul 2023 19:22:43 +0200
Subject: make upstream package download non-fatal (for instance for
 build-support packages with a complete PKGBUILD

---
 lib/common-functions | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lib/common-functions b/lib/common-functions
index 8960b0a..1ab3e72 100755
--- a/lib/common-functions
+++ b/lib/common-functions
@@ -480,9 +480,13 @@ extract_source_directory() {
       >&2 echo 'Download upstream-package from upstream via buildmaster cache failed. Curl exit code was $res.'
       return 1
     fi
-    tar -xz -f "${pkgtarfile}" --strip-components=1 -C "${output}" -- "${pkgbase_translated}-${revision}"
-    printf '\n' >> \
-      "${output}/PKGBUILD"
+    if [ -f "${pkgtarfile}" ]; then
+      tar -xz -f "${pkgtarfile}" --strip-components=1 -C "${output}" -- "${pkgbase_translated}-${revision}"
+      printf '\n' >> \
+        "${output}/PKGBUILD"
+    else
+      >&2 echo 'No upstream tarfile, assuming the package is a local one and has a full PKGBUILD not a diff-PKGBUILD.'
+    fi
   fi
 
   if [ -n "${mod_revision}" ] \
-- 
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