Extract archive as separate function

downstream.sh

@@ -111,6 +111,17 @@ function prep()
     fi
 }
 
+function archive()
+{
+    mkdir -p archive
+    rm -f archive/$p.tar archive/$p.tar.zst
+    commit=$($git -C "downstream/$p" rev-parse upstream-base)
+    date=$($git -C "downstream/$p" cat-file commit $commit | sed -n '/^author /s/.* \([0-9][0-9]* [+-][0-9][0-9]*$\)/\1/;T;p;q')
+    tree=$($git -C "downstream/$p" cat-file commit $commit | sed -n 's/^tree //;T;p;q')
+    $git -C "downstream/$p" archive --prefix downstream/$p/ --mtime "$date" "$tree" >archive/$p.tar
+    zstd --rm -T8 -12 archive/$p.tar
+}
+
 for p; do
     if [[ ! -f project/$p.properties ]]; then
         echo "$0: $p: upstream descriptor not found" >&2
@@ -135,13 +146,7 @@ for p; do
     elif [[ "$cmd" = prep ]]; then
         prep
     elif [[ "$cmd" = archive ]]; then
-        mkdir -p archive
-        rm -f archive/$p.tar archive/$p.tar.zst
-        commit=$($git -C "downstream/$p" rev-parse upstream-base)
-        date=$($git -C "downstream/$p" cat-file commit $commit | sed -n '/^author /s/.* \([0-9][0-9]* [+-][0-9][0-9]*$\)/\1/;T;p;q')
-        tree=$($git -C "downstream/$p" cat-file commit $commit | sed -n 's/^tree //;T;p;q')
-        $git -C "downstream/$p" archive --prefix downstream/$p/ --mtime "$date" "$tree" >archive/$p.tar
-        zstd --rm -T8 -12 archive/$p.tar
+        archive
     else
         echo "$0: unknown command: $cmd" >&2
         exit 1