initial commit - it works.

.github/workflows/MainDistributionPipeline.yml

@@ -18,7 +18,7 @@ jobs:
     with:
       vcpkg_commit: a42af01b72c28a8e1d7b48107b33e4f286a55ef6
       duckdb_version: v0.9.2
-      extension_name: quack
+      extension_name: hydro_duck
 
   duckdb-stable-deploy:
     name: Deploy extension binaries
@@ -27,6 +27,6 @@ jobs:
     secrets: inherit
     with:
       duckdb_version: v0.9.2
-      extension_name: quack
+      extension_name: hydro_duck
       deploy_latest: ${{ startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main' }}
       deploy_versioned: ${{ startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main' }}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "C_Cpp.default.compilerPath": "/usr/bin/g++"
+}

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 2.8.12)
 
 # Set extension name here
-set(TARGET_NAME quack)
+set(TARGET_NAME hydro_duck)
 
 # DuckDB's extension distribution supports vcpkg. As such, dependencies can be added in ./vcpkg.json and then
 # used in cmake with find_package. Feel free to remove or replace with other dependencies.
@@ -14,7 +14,7 @@ set(LOADABLE_EXTENSION_NAME ${TARGET_NAME}_loadable_extension)
 project(${TARGET_NAME})
 include_directories(src/include)
 
-set(EXTENSION_SOURCES src/quack_extension.cpp)
+set(EXTENSION_SOURCES src/hydro_duck_extension.cpp)
 
 build_static_extension(${TARGET_NAME} ${EXTENSION_SOURCES})
 build_loadable_extension(${TARGET_NAME} " " ${EXTENSION_SOURCES})

Makefile

@@ -31,12 +31,12 @@ ifeq ($(GEN),ninja)
 	GENERATOR=-G "Ninja" -DFORCE_COLORED_OUTPUT=1
 endif
 
-EXT_NAME=quack
+EXT_NAME=hydro_duck
 
 #### Configuration for this extension
-EXTENSION_NAME=QUACK
+EXTENSION_NAME=HYDRO_DUCK
 EXTENSION_FLAGS=\
--DDUCKDB_EXTENSION_NAMES="quack" \
+-DDUCKDB_EXTENSION_NAMES="hydro_duck" \
 -DDUCKDB_EXTENSION_${EXTENSION_NAME}_PATH="$(PROJ_DIR)" \
 -DDUCKDB_EXTENSION_${EXTENSION_NAME}_LOAD_TESTS=1 \
 -DDUCKDB_EXTENSION_${EXTENSION_NAME}_INCLUDE_PATH="$(PROJ_DIR)src/include" \
@@ -49,7 +49,7 @@ BUILD_FLAGS=-DEXTENSION_STATIC_BUILD=1 $(EXTENSION_FLAGS) ${EXTRA_EXTENSIONS_FLA
 CLIENT_FLAGS:=
 
 #### Main build
-# For regular CLI build, we link the quack extension directly into the DuckDB executable
+# For regular CLI build, we link the hydro_duck extension directly into the DuckDB executable
 CLIENT_FLAGS=-DDUCKDB_EXTENSION_${EXTENSION_NAME}_SHOULD_LINK=1
 
 debug:
@@ -83,8 +83,8 @@ test_debug: debug
 	./build/debug/$(TEST_PATH) "$(PROJ_DIR)test/*"
 
 #### Client tests
-DEBUG_EXT_PATH='$(PROJ_DIR)build/debug/extension/quack/quack.duckdb_extension'
-RELEASE_EXT_PATH='$(PROJ_DIR)build/release/extension/quack/quack.duckdb_extension'
+DEBUG_EXT_PATH='$(PROJ_DIR)build/debug/extension/hydro_duck/hydro_duck.duckdb_extension'
+RELEASE_EXT_PATH='$(PROJ_DIR)build/release/extension/hydro_duck/hydro_duck.duckdb_extension'
 test_js: test_debug_js
 test_debug_js: debug_js
 	cd duckdb/tools/nodejs && ${EXTENSION_NAME}_EXTENSION_BINARY_PATH=$(DEBUG_EXT_PATH) npm run test-path -- "../../../test/nodejs/**/*.js"

README.md

@@ -0,0 +1,86 @@
+# Quack
+
+This repository is based on https://github.com/duckdb/extension-template, check it out if you want to build and ship your own DuckDB extension.
+
+---
+
+This extension, Quack, allow you to ... <extension_goal>.
+
+
+## Building
+### Managing dependencies
+DuckDB extensions uses VCPKG for dependency management. Enabling VCPKG is very simple: follow the [installation instructions](https://vcpkg.io/en/getting-started) or just run the following:
+```shell
+git clone https://github.com/Microsoft/vcpkg.git
+./vcpkg/bootstrap-vcpkg.sh
+export VCPKG_TOOLCHAIN_PATH=`pwd`/vcpkg/scripts/buildsystems/vcpkg.cmake
+```
+Note: VCPKG is only required for extensions that want to rely on it for dependency management. If you want to develop an extension without dependencies, or want to do your own dependency management, just skip this step. Note that the example extension uses VCPKG to build with a dependency for instructive purposes, so when skipping this step the build may not work without removing the dependency.
+
+### Build steps
+Now to build the extension, run:
+```sh
+make
+```
+The main binaries that will be built are:
+```sh
+./build/release/duckdb
+./build/release/test/unittest
+./build/release/extension/hydro_duck/hydro_duck.duckdb_extension
+```
+- `duckdb` is the binary for the duckdb shell with the extension code automatically loaded.
+- `unittest` is the test runner of duckdb. Again, the extension is already linked into the binary.
+- `hydro_duck.duckdb_extension` is the loadable binary as it would be distributed.
+
+## Running the extension
+To run the extension code, simply start the shell with `./build/release/duckdb`.
+
+Now we can use the features from the extension directly in DuckDB. The template contains a single scalar function `hydro_duck()` that takes a string arguments and returns a string:
+```
+D select hydro_duck('Jane') as result;
+┌───────────────┐
+│    result     │
+│    varchar    │
+├───────────────┤
+│ Quack Jane 🐥 │
+└───────────────┘
+```
+
+## Running the tests
+Different tests can be created for DuckDB extensions. The primary way of testing DuckDB extensions should be the SQL tests in `./test/sql`. These SQL tests can be run using:
+```sh
+make test
+```
+
+### Installing the deployed binaries
+To install your extension binaries from S3, you will need to do two things. Firstly, DuckDB should be launched with the
+`allow_unsigned_extensions` option set to true. How to set this will depend on the client you're using. Some examples:
+
+CLI:
+```shell
+duckdb -unsigned
+```
+
+Python:
+```python
+con = duckdb.connect(':memory:', config={'allow_unsigned_extensions' : 'true'})
+```
+
+NodeJS:
+```js
+db = new duckdb.Database(':memory:', {"allow_unsigned_extensions": "true"});
+```
+
+Secondly, you will need to set the repository endpoint in DuckDB to the HTTP url of your bucket + version of the extension
+you want to install. To do this run the following SQL query in DuckDB:
+```sql
+SET custom_extension_repository='bucket.s3.eu-west-1.amazonaws.com/<your_extension_name>/latest';
+```
+Note that the `/latest` path will allow you to install the latest extension version available for your current version of
+DuckDB. To specify a specific version, you can pass the version instead.
+
+After running these steps, you can install and load your extension using the regular INSTALL/LOAD commands in DuckDB:
+```sql
+INSTALL hydro_duck
+LOAD hydro_duck
+```

src/hydro_duck_extension.cpp

@@ -0,0 +1,56 @@
+#define DUCKDB_EXTENSION_MAIN
+
+#include "hydro_duck_extension.hpp"
+#include "duckdb.hpp"
+#include "duckdb/common/exception.hpp"
+#include "duckdb/common/string_util.hpp"
+#include "duckdb/function/scalar_function.hpp"
+#include "duckdb/function/aggregate_function.hpp"
+#include "duckdb/main/extension_util.hpp"
+#include <duckdb/parser/parsed_data/create_scalar_function_info.hpp>
+
+#include "duckdb/function/aggregate_function.hpp"
+#include "duckdb/function/function.hpp"
+
+
+namespace duckdb {
+
+inline void HydroDuckScalarFun(DataChunk &args, ExpressionState &state, Vector &result) {
+    auto &name_vector = args.data[0];
+    UnaryExecutor::Execute<string_t, string_t>(
+	    name_vector, result, args.size(),
+	    [&](string_t name) {
+			return StringVector::AddString(result, "HydroDuck "+name.GetString()+" 🐥");;
+        });
+}
+
+static void LoadInternal(DatabaseInstance &instance) {
+    // Register a scalar function
+    auto hydro_duck_scalar_function = ScalarFunction("quack", {LogicalType::VARCHAR}, LogicalType::VARCHAR, HydroDuckScalarFun);
+    ExtensionUtil::RegisterFunction(instance, hydro_duck_scalar_function);
+}
+
+void HydroDuckExtension::Load(DuckDB &db) {
+	LoadInternal(*db.instance);
+}
+std::string HydroDuckExtension::Name() {
+	return "hydro_duck";
+}
+
+} // namespace duckdb
+
+extern "C" {
+
+DUCKDB_EXTENSION_API void hydro_duck_init(duckdb::DatabaseInstance &db) {
+    duckdb::DuckDB db_wrapper(db);
+    db_wrapper.LoadExtension<duckdb::HydroDuckExtension>();
+}
+
+DUCKDB_EXTENSION_API const char *hydro_duck_version() {
+	return duckdb::DuckDB::LibraryVersion();
+}
+}
+
+#ifndef DUCKDB_EXTENSION_MAIN
+#error DUCKDB_EXTENSION_MAIN not defined
+#endif