Fix linux external duckdb eg: ./build.sh --duckdb-external minimum

Author: sysadminmike

build.sh

@@ -122,9 +122,25 @@ ok()   { echo -e "\033[32m$1\033[0m"; }
 fail() { echo -e "\033[31m$1\033[0m"; exit 1; }
 
 ensure_venv() {
+    # If venv looks broken (python exists but activate missing), recreate it
+    if [ -d "$VENV_PATH" ] && [ ! -f "$VENV_PATH/bin/activate" ]; then
+        echo "  Venv at $VENV_PATH is corrupt (missing bin/activate), recreating..."
+        rm -rf "$VENV_PATH"
+    fi
     if [ ! -f "$VENV_PATH/bin/python" ]; then
         step "Creating Python virtual environment"
-        python3 -m venv "$VENV_PATH"
+        if ! command -v python3 &>/dev/null; then
+            fail "python3 not found. Install Python 3.10+ first."
+        fi
+        if ! python3 -m venv "$VENV_PATH" 2>&1; then
+            echo ""
+            echo "  Failed to create virtual environment."
+            echo "  On Debian/Ubuntu, install the venv module:"
+            echo "    sudo apt install python3-venv"
+            echo "  On Fedora/RHEL:"
+            echo "    sudo dnf install python3-libs"
+            fail "python3 -m venv failed (see above)"
+        fi
     fi
     source "$VENV_PATH/bin/activate"
 }
@@ -195,7 +211,13 @@ cmd_setup() {
 
     step "Verifying Go installation"
     if ! command -v go &>/dev/null; then
-        fail "Go is not installed. Install it from https://go.dev/dl/"
+        echo "  Go is not on your PATH."
+        echo "  If already installed, add it to your PATH:"
+        echo "    export PATH=\$PATH:/usr/local/go/bin"
+        echo "  To make it permanent:"
+        echo "    echo 'export PATH=\$PATH:/usr/local/go/bin' >> ~/.bashrc"
+        echo ""
+        fail "Go not found. Install from https://go.dev/dl/ or add it to your PATH."
     fi
     go version
 
@@ -238,8 +260,8 @@ cmd_server() {
     else
         echo "  WARNING: lancedb-go native lib not found at $lib_dir" >&2
         echo "  Download it with: cd server && go generate ./..." >&2
-        echo "  Falling back to CGO_ENABLED=0 (lancedb-go writes will not work)" >&2
-        export CGO_ENABLED=0
+        echo "  Falling back to lance_external (lancedb-go writes will not work)" >&2
+        LANCE_EXTERNAL=true
     fi
 
     local build_time
@@ -340,7 +362,10 @@ cmd_server() {
             echo "  The server will use tools/duckdb binary at runtime."
             echo "  To retry embedded: ./build.sh --duckdb-embedded server"
             echo ""
-            # If CGo failed, also use external Lance (no native lib available)
+            # CGo genuinely broken: disable it and use external everything.
+            # The offline cache (go-duckdb) will also be disabled; the nocgo
+            # stub makes newOfflineCache return an error handled gracefully.
+            export CGO_ENABLED=0
             LANCE_EXTERNAL=true
             _build_external
         fi
@@ -533,6 +558,12 @@ cmd_duckdb() {
         # DuckDB uses "universal" for macOS (fat binary)
         arch="universal"
     fi
+    # DuckDB uses "amd64" not "x86_64" and "arm64" not "aarch64"
+    if [ "$arch" = "x86_64" ]; then
+        arch="amd64"
+    elif [ "$arch" = "aarch64" ]; then
+        arch="arm64"
+    fi
     local url="https://github.com/duckdb/duckdb/releases/download/${ver}/duckdb_cli-${os_name}-${arch}.zip"
     echo "  Downloading DuckDB $ver for ${os_name}-${arch} ..."
     curl -fSL -o "$TOOLS_DIR/duckdb.zip" "$url"

run.sh

@@ -31,6 +31,11 @@ ensure_venv() {
         echo "Run build.sh setup first."
         exit 1
     fi
+    if [ ! -f "$VENV_PATH/bin/activate" ]; then
+        echo "Venv exists but activate script missing at: $VENV_PATH"
+        echo "Delete .venv/ and re-run: rm -rf .venv && ./build.sh setup"
+        exit 1
+    fi
     source "$VENV_PATH/bin/activate"
 }
 

server/db/lance_cgo.go

@@ -24,7 +24,7 @@ import (
 
 	"rss-lance/server/debug"
 
-	_ "github.com/marcboeker/go-duckdb"
+	_ "github.com/marcboeker/go-duckdb/v2"
 )
 
 // cgoStore wraps a DuckDB connection via the go-duckdb CGo driver (reads only).
@@ -1199,6 +1199,9 @@ func (s *cgoStore) logTableExists(name string) bool {
 }
 
 func (s *cgoStore) WriteLog(entry LogEntry) error {
+	if s.logBuf == nil {
+		return nil
+	}
 	s.logBuf.add(entry)
 	return nil
 }

server/db/lance_windows.go server/db/lance_cli.goserver/db/lance_windows.go renamed to server/db/lance_cli.go

@@ -12,8 +12,6 @@ import (
 	"time"
 
 	"rss-lance/server/debug"
-
-	_ "github.com/marcboeker/go-duckdb"
 )
 
 // OfflineConfig holds offline-mode settings read from the settings table.
@@ -75,7 +73,7 @@ func newOfflineCache(cfg OfflineConfig) (*offlineCache, error) {
 		}
 	}
 
-	conn, err := sql.Open("duckdb", cfg.CachePath)
+	conn, err := openOfflineDuckDB(cfg.CachePath)
 	if err != nil {
 		return nil, fmt.Errorf("open offline cache %s: %w", cfg.CachePath, err)
 	}

server/db/offline_cache.go

@@ -0,0 +1,15 @@
+//go:build cgo
+
+package db
+
+import (
+	"database/sql"
+
+	_ "github.com/marcboeker/go-duckdb/v2"
+)
+
+// openOfflineDuckDB opens the offline cache DuckDB file via the embedded
+// go-duckdb driver (requires CGo / GCC at build time).
+func openOfflineDuckDB(path string) (*sql.DB, error) {
+	return sql.Open("duckdb", path)
+}

server/db/offline_cache_driver_cgo.go

@@ -0,0 +1,16 @@
+//go:build !cgo
+
+package db
+
+import (
+	"database/sql"
+	"fmt"
+)
+
+// openOfflineDuckDB returns an error when CGo is not available.
+// The offline cache requires the go-duckdb driver which needs CGo.
+// Callers handle this gracefully: offCache stays nil and the server
+// continues without offline caching or log fallback to DuckDB.
+func openOfflineDuckDB(path string) (*sql.DB, error) {
+	return nil, fmt.Errorf("offline cache unavailable: go-duckdb requires CGo (build with CGO_ENABLED=1 and GCC)")
+}

server/db/offline_cache_driver_nocgo.go

@@ -1,29 +1,38 @@
 module rss-lance/server
 
-go 1.23
+go 1.24
 
 require (
 	github.com/BurntSushi/toml v1.3.2
 	github.com/apache/arrow/go/v17 v17.0.0
 	github.com/lancedb/lancedb-go v0.1.2
-	github.com/marcboeker/go-duckdb v1.8.3
+	github.com/marcboeker/go-duckdb/v2 v2.4.3
 )
 
 require (
-	github.com/apache/arrow-go/v18 v18.0.0 // indirect
-	github.com/goccy/go-json v0.10.3 // indirect
-	github.com/google/flatbuffers v24.3.25+incompatible // indirect
-	github.com/klauspost/compress v1.17.11 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
-	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pierrec/lz4/v4 v4.1.21 // indirect
+	github.com/apache/arrow-go/v18 v18.4.1 // indirect
+	github.com/duckdb/duckdb-go-bindings v0.1.21 // indirect
+	github.com/duckdb/duckdb-go-bindings/darwin-amd64 v0.1.21 // indirect
+	github.com/duckdb/duckdb-go-bindings/darwin-arm64 v0.1.21 // indirect
+	github.com/duckdb/duckdb-go-bindings/linux-amd64 v0.1.21 // indirect
+	github.com/duckdb/duckdb-go-bindings/linux-arm64 v0.1.21 // indirect
+	github.com/duckdb/duckdb-go-bindings/windows-amd64 v0.1.21 // indirect
+	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/google/flatbuffers v25.2.10+incompatible // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/marcboeker/go-duckdb/arrowmapping v0.0.21 // indirect
+	github.com/marcboeker/go-duckdb/mapping v0.0.21 // indirect
+	github.com/pierrec/lz4/v4 v4.1.22 // indirect
 	github.com/zeebo/xxh3 v1.0.2 // indirect
-	golang.org/x/exp v0.0.0-20240909161429-701f63a606c0 // indirect
-	golang.org/x/mod v0.21.0 // indirect
-	golang.org/x/sync v0.8.0 // indirect
-	golang.org/x/sys v0.26.0 // indirect
-	golang.org/x/tools v0.26.0 // indirect
-	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
+	golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
+	golang.org/x/mod v0.27.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/tools v0.36.0 // indirect
+	golang.org/x/xerrors v0.0.0-20240903120638-7835f813f4da // indirect
 )
 
 replace github.com/lancedb/lancedb-go => github.com/sysadminmike/lancedb-go v0.0.0-20260317063623-767933bdbab9

server/go.mod

@@ -1,41 +1,59 @@
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-github.com/andybalholm/brotli v1.1.1 h1:PR2pgnyFznKEugtsUo0xLdDop5SKXd5Qf5ysW+7XdTA=
-github.com/andybalholm/brotli v1.1.1/go.mod h1:05ib4cKhjx3OQYUY22hTVd34Bc8upXjOLL2rKwwZBoA=
-github.com/apache/arrow-go/v18 v18.0.0 h1:1dBDaSbH3LtulTyOVYaBCHO3yVRwjV+TZaqn3g6V7ZM=
-github.com/apache/arrow-go/v18 v18.0.0/go.mod h1:t6+cWRSmKgdQ6HsxisQjok+jBpKGhRDiqcf3p0p/F+A=
+github.com/andybalholm/brotli v1.2.0 h1:ukwgCxwYrmACq68yiUqwIWnGY0cTPox/M94sVwToPjQ=
+github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
+github.com/apache/arrow-go/v18 v18.4.1 h1:q/jVkBWCJOB9reDgaIZIdruLQUb1kbkvOnOFezVH1C4=
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@@ -44,20 +62,19 @@ github.com/zeebo/assert v1.3.0 h1:g7C04CbJuIDKNPFHmsk4hwZDO5O+kntRxzaUoNXj+IQ=
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