Upgrade major version change

postgres/rootfs/etc/cont-init.d/99-run.sh

@@ -61,7 +61,7 @@ bashio::log.info "Waiting for PostgreSQL to start..."
 ( bashio::net.wait_for 5432 localhost 900
 
 ###############################
-# PostgreSQL Major Version Upgrade Check #
+# PostgreSQL Major Version Upgrade #
 ###############################
 
 # Read the previous PostgreSQL version from file
@@ -70,10 +70,40 @@ OLD_PG_VERSION=$(cat "$PG_VERSION_FILE" 2>/dev/null || echo "")
 if [ "$OLD_PG_VERSION" != "$PG_MAJOR_VERSION" ]; then
     bashio::log.warning "PostgreSQL major version changed ($OLD_PG_VERSION → $PG_MAJOR_VERSION). Running upgrade..."
 
+    OLD_BIN_DIR="/usr/lib/postgresql/$OLD_PG_VERSION/bin"
+    NEW_BIN_DIR="/usr/lib/postgresql/$PG_MAJOR_VERSION/bin"
+
+    # Check if the old PostgreSQL binaries exist
+    if [ ! -d "$OLD_BIN_DIR" ]; then
+        bashio::log.warning "Old PostgreSQL binaries ($OLD_PG_VERSION) not found! Downloading..."
+
+        # Determine the package URL (adjust this as needed for your PostgreSQL distribution)
+        PG_DOWNLOAD_URL="https://ftp.postgresql.org/pub/source/v$OLD_PG_VERSION/postgresql-$OLD_PG_VERSION.tar.gz"
+
+        # Create a temporary directory for the download
+        TMP_DIR=$(mktemp -d)
+        cd "$TMP_DIR" || exit 1
+
+        # Download and extract PostgreSQL source
+        wget "$PG_DOWNLOAD_URL" -O postgresql.tar.gz
+        tar -xzf postgresql.tar.gz
+
+        # Build only the necessary binaries
+        cd "postgresql-$OLD_PG_VERSION" || exit 1
+        ./configure --prefix="$OLD_BIN_DIR"
+        make -j$(nproc)
+        make install
+
+        # Clean up
+        cd /config || exit 1
+        rm -rf "$TMP_DIR"
+    fi
+
+    # Run pg_upgrade with the correct paths
     pg_upgrade --old-datadir="$PGDATA" \
                --new-datadir="$PGDATA-new" \
-               --old-bindir="/usr/lib/postgresql/$OLD_PG_VERSION/bin" \
-               --new-bindir="/usr/lib/postgresql/$PG_MAJOR_VERSION/bin"
+               --old-bindir="$OLD_BIN_DIR" \
+               --new-bindir="$NEW_BIN_DIR"
 
     # Replace old data directory with upgraded one
     mv "$PGDATA" "$PGDATA-old"