Also, write to it only if it does not already exist.

As discussed here[1], reading from templateconf.cfg serves no purpose:
it exists only if the build directory has already been initialized, and so
the scripts will not change anything in the build directory anyway.

My adjustment is to keep the file however; it is useful as a pointer
to the original template, which can be utilized by config management
tools in the future.

[1] 
https://lists.openembedded.org/g/openembedded-architecture/topic/template_handling_in_oe_core/93968540

Signed-off-by: Alexander Kanavin <a...@linutronix.de>
---
 scripts/oe-setup-builddir | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/scripts/oe-setup-builddir b/scripts/oe-setup-builddir
index e3c8c6d437..3a91bbf5b1 100755
--- a/scripts/oe-setup-builddir
+++ b/scripts/oe-setup-builddir
@@ -34,16 +34,6 @@ chmod -st "$BUILDDIR/conf" 2>/dev/null || echo "WARNING: 
unable to chmod $BUILDD
 
 cd "$BUILDDIR" || die "Failed to change directory to $BUILDDIR!"
 
-if [ -z "$TEMPLATECONF" ] && [ -f "$BUILDDIR/conf/templateconf.cfg" ]; then
-    TEMPLATECONF=$(cat "$BUILDDIR/conf/templateconf.cfg")
-    # The following two are no longer valid; unsetting them will automatically 
get them replaced
-    # with correct ones.
-    if [ "$TEMPLATECONF" = meta/conf ] || [ "$TEMPLATECONF" = meta-poky/conf 
]; then
-        unset TEMPLATECONF
-        rm "$BUILDDIR/conf/templateconf.cfg"
-    fi
-fi
-
 . "$OEROOT/.templateconf"
 
 # Keep the original TEMPLATECONF before possibly prefixing it with $OEROOT 
below.
@@ -132,4 +122,6 @@ fi
 [ ! -r "$OECORENOTESCONF" ] || cat "$OECORENOTESCONF"
 unset OECORENOTESCONF
 
-echo "$ORG_TEMPLATECONF" >"$BUILDDIR/conf/templateconf.cfg"
+if [ ! -f "$BUILDDIR/conf/templateconf.cfg" ]; then
+  echo "$ORG_TEMPLATECONF" >"$BUILDDIR/conf/templateconf.cfg"
+fi
-- 
2.30.2

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