D bindings

* `std.paralellism` support added (write/read/list)
* CI/CD test
* rename `is_exists` - ref.: #5199

Signed-off-by: Matheus C. França  <[email protected]>

.devcontainer/post_create.sh

@@ -69,3 +69,6 @@ opam install -y dune ounit2 ocamlformat
 
 # Setup for Cpp binding
 sudo apt install -y ninja-build
+
+# Setup for D binding
+sudo apt install -y dmd dub

.gitattributes

@@ -8,6 +8,7 @@ integrations export-ignore
 
 bindings/c export-ignore
 bindings/cpp export-ignore
+bindings/d export-ignore
 bindings/dotnet export-ignore
 bindings/go export-ignore
 bindings/haskell export-ignore

.github/workflows/ci_bindings_d.yml

@@ -0,0 +1,73 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+name: Bindings D CI
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "*"
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "core/**"
+      - "bindings/c/**"
+      - "bindings/d/**"
+      - ".github/workflows/ci_bindings_d.yml"
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    strategy:
+      matrix:
+      # dmd: base (self-hosting) compiler (frontend & backend)
+      # ldc2/ldmd2: (dmd-frontend + LLVM backend) - recommended for MacOS ARM64
+        dlang: ["ldc-latest", "dmd-latest"]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dlang-community/setup-dlang@v2
+        with:
+          compiler: ${{ matrix.dlang }}
+
+      - name: Setup Rust toolchain
+        uses: ./.github/actions/setup
+
+      - name: Build D binding
+        working-directory: bindings/d
+        run: dub build
+
+      - name: Check diff
+        run: git diff --exit-code
+
+      - name: Check
+        working-directory: bindings/d
+        run: dub lint
+
+      - name: Run tests
+        working-directory: bindings/d
+        run: dub test && cd test && dub

.typos.toml

@@ -36,4 +36,6 @@ extend-exclude = [
   # Generated pnpm locks.
   "website/pnpm-lock.yaml",
   "CHANGELOG.md",
+  # dscanner config
+  "bindings/d/dscanner.ini",
 ]

README.md

@@ -14,6 +14,7 @@ OpenDAL offers a unified data access layer, empowering users to seamlessly and e
 | [Rust Core]       | [![Rust Core Image]][Rust Core Link]             | [![Docs Release]][Rust Core Release Docs] [![Docs Dev]][Rust Core Dev Docs]       |
 | [C Binding]       | -                                                | [![Docs Dev]][C Binding Dev Docs]                                                 |
 | [Cpp Binding]     | -                                                | [![Docs Dev]][Cpp Binding Dev Docs]                                               |
+| [D Binding]   | -                                                | -                                                                                 |
 | [Dotnet Binding]  | -                                                | -                                                                                 |
 | [Go Binding]      | [![Go Binding Image]][Go Binding Link]           | [![Docs Release]][Go Release Docs]                                         |
 | [Haskell Binding] | -                                                | -                                                                                 |
@@ -38,6 +39,7 @@ OpenDAL offers a unified data access layer, empowering users to seamlessly and e
 [C Binding Dev Docs]: https://opendal.apache.org/docs/c/
 [Cpp Binding]: bindings/cpp/README.md
 [Cpp Binding Dev Docs]: https://opendal.apache.org/docs/cpp/
+[D Binding]: bindings/d/README.md
 [Dotnet Binding]: bindings/dotnet/README.md
 [Go Binding]: bindings/go/README.md
 [Go Binding Image]: https://badge.fury.io/go/github.com%2Fapache%2Fopendal%2Fbindings%2Fgo.svg

bindings/README.md

@@ -13,6 +13,7 @@ This folder contains the bindings for OpenDAL. Currently, we support the followi
 * [C](c/README.md)
 * [C++](cpp/README.md)
 * [C#](dotnet/README.md)
+* [D](d/README.md)
 * [Go](go/README.md)
 * [Haskell](haskell/README.md)
 * [Lua](lua/README.md)

bindings/d/.gitignore

@@ -0,0 +1,20 @@
+.dub
+docs.json
+__dummy.html
+docs/
+/d
+d.so
+d.dylib
+d.dll
+d.a
+d.lib
+d-test-*
+*.exe
+*.pdb
+*.o
+*.obj
+*.lst
+*.h
+*.a
+*.ninja_log
+tests*

bindings/d/CONTRIBUTING.md

@@ -0,0 +1,58 @@
+# Contributing
+
+- [Contributing](#contributing)
+  - [Setup](#setup)
+    - [Using a dev container environment](#using-a-dev-container-environment)
+    - [Bring your own toolbox](#bring-your-own-toolbox)
+  - [Build](#build)
+  - [Test](#test)
+
+## Setup
+
+### Using a dev container environment
+
+OpenDAL provides a pre-configured [dev container](https://containers.dev/) that could be used in [GitHub Codespaces](https://github.com/features/codespaces), [VSCode](https://code.visualstudio.com/), [JetBrains](https://www.jetbrains.com/remote-development/gateway/), [JupyterLab](https://jupyterlab.readthedocs.io/en/stable/). Please pick up your favourite runtime environment.
+
+The fastest way is:
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/apache/opendal?quickstart=1&machine=standardLinux32gb)
+
+### Bring your own toolbox
+
+To build OpenDAL D binding locally, you need:
+
+- [dmd/ldc/gdc](https://dlang.org/download)
+
+
+## Build
+
+First, build the C bindings:
+
+```shell
+dub build -b release
+```
+
+> **Note**:
+>
+> - `dub build` adds the header file `opendal.h` under `../c/include`
+> - The library is under `../../target/debug` or `../../target/release` after building.
+
+## Test
+
+To build and run the tests.
+
+```shell
+$ dub test
+  Generating test runner configuration 'opendal-test-unittest' for 'unittest' (library).
+    Starting Performing "unittest" build using /usr/bin/ldc2 for x86_64.
+    Building opendal ~master: building configuration [opendal-test-unittest]
+   Pre-build Running commands
+    Finished `release` profile [optimized] target(s) in 0.08s
+Cargo build completed successfully
+     Linking opendal-test-unittest
+     Running opendal-test-unittest 
+Basic Operator creation and write test passed
+1 modules passed unittests
+```
+
+

bindings/d/DEPENDENCIES.md

@@ -0,0 +1,4 @@
+# Dependencies
+
+OpenDAL D Binding is based on the C Binding.
+There are no extra runtime dependencies except those conveyed from C Binding.

bindings/d/README.md

@@ -0,0 +1,24 @@
+# Apache OpenDAL™ D Binding (WIP)
+
+![](https://img.shields.io/badge/status-unreleased-red)
+
+![](https://github.com/apache/opendal/assets/5351546/87bbf6e5-f19e-449a-b368-3e283016c887)
+
+## Build
+
+To compile OpenDAL from source code, you need:
+
+- [dmd/ldc/gdc](https://dlang.org/download)
+
+```bash
+# build libopendal_c (underneath call make -C ../c)
+dub build -b release
+# build and run unit tests
+dub test
+```
+
+## License and Trademarks
+
+Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
+
+Apache OpenDAL, OpenDAL, and Apache are either registered trademarks or trademarks of the Apache Software Foundation.

bindings/d/build.d

@@ -0,0 +1,42 @@
+module build;
+import std.stdio: writeln;
+import std.path: buildPath;
+import std.process: spawnShell, wait;
+import std.exception;
+import std.file: copy, mkdir, exists;
+import std.conv: to;
+
+version (Windows)
+    enum staticlib = "opendal_c.lib";
+else
+    enum staticlib = "libopendal_c.a";
+
+void main (string[] args)
+{
+    bool isRelease = args.length > 1 && args[1] == "release";
+    string buildType = isRelease ? "release" : "debug";
+
+    // Run cargo build
+    auto cargoCmd = "cargo build --manifest-path " ~ buildPath(
+        "..", "c", "Cargo.toml") ~ (isRelease ? " --release" : "");
+
+    auto status = wait(spawnShell(cargoCmd));
+    if (status != 0)
+    {
+        throw new Exception("Cargo build failed with status: " ~ status.to!string);
+    }
+    else
+    {
+        writeln("Cargo build completed successfully");
+    }
+
+    // Get opendal.h
+    copy(buildPath("..", "c", "include", "opendal.h"), buildPath("source", "opendal", "opendal.h"));
+
+    // Get libopendal_c.a
+    auto libPath = buildPath("..", "c", "target", buildType, staticlib);
+    writeln("Copying ", libPath, " to ", buildPath("lib", staticlib));
+    if (!exists("lib"))
+        mkdir ("lib");
+    copy(libPath, buildPath("lib", staticlib));
+}

bindings/d/dscanner.ini

@@ -0,0 +1,105 @@
+; Configure which static analysis checks are enabled
+[analysis.config.StaticAnalysisConfig]
+; Check variable, class, struct, interface, union, and function names against
+; the Phobos style guide
+style_check="disabled"
+; Check for array literals that cause unnecessary allocation
+enum_array_literal_check="enabled"
+; Check for poor exception handling practices
+exception_check="enabled"
+; Check for use of the deprecated 'delete' keyword
+delete_check="enabled"
+; Check for use of the deprecated floating point operators
+float_operator_check="enabled"
+; Check underscores to improve number constant readability
+number_style_check="enabled"
+; Checks that opEquals, opCmp, toHash, and toString are either const, immutable
+; , or inout.
+object_const_check="enabled"
+; Checks for .. expressions where the left side is larger than the right.
+backwards_range_check="enabled"
+; Checks for if statements whose 'then' block is the same as the 'else' block
+if_else_same_check="enabled"
+; Checks for some problems with constructors
+constructor_check="enabled"
+; Checks for unused function parameters
+unused_parameter_check="disabled"
+; Checks for unused variables
+unused_variable_check="enabled"
+; Checks for unused labels
+unused_label_check="enabled"
+; Checks for duplicate attributes
+duplicate_attribute="enabled"
+; Checks that opEquals and toHash are both defined or neither are defined
+opequals_tohash_check="disabled"
+; Checks for subtraction from .length properties
+length_subtraction_check="disabled"
+; Checks for methods or properties whose names conflict with built-in propertie
+; s
+builtin_property_names_check="enabled"
+; Checks for confusing code in inline asm statements
+asm_style_check="enabled"
+; Checks for confusing logical operator precedence
+logical_precedence_check="disabled"
+; Checks for undocumented public declarations
+undocumented_declaration_check="disabled"
+; Checks for poor placement of function attributes
+function_attribute_check="enabled"
+; Checks for use of the comma operator
+comma_expression_check="enabled"
+; Checks for local imports that are too broad
+local_import_check="disabled"
+; Checks for variables that could be declared immutable
+could_be_immutable_check="disabled"
+; Checks for redundant expressions in if statements
+redundant_if_check="enabled"
+; Checks for redundant parenthesis
+redundant_parens_check="disabled"
+; Checks for mismatched argument and parameter names
+mismatched_args_check="disabled"
+; Checks for labels with the same name as variables
+label_var_same_name_check="disabled"
+; Checks for lines longer than 120 characters
+long_line_check="disabled"
+; Checks for assignment to auto-ref function parameters
+auto_ref_assignment_check="disabled"
+; Checks for incorrect infinite range definitions
+incorrect_infinite_range_check="enabled"
+; Checks for asserts that are always true
+useless_assert_check="enabled"
+; Check for uses of the old-style alias syntax
+alias_syntax_check="enabled"
+; Checks for else if that should be else static if
+static_if_else_check="enabled"
+; Check for unclear lambda syntax
+lambda_return_check="enabled"
+; Check for auto function without return statement
+auto_function_check="enabled"
+; Check for sortedness of imports
+imports_sortedness="disabled"
+; Check for explicitly annotated unittests
+explicitly_annotated_unittests="disabled"
+; Check for properly documented public functions (Returns, Params)
+properly_documented_public_functions="disabled"
+; Check for useless usage of the final attribute
+final_attribute_check="enabled"
+; Check for virtual calls in the class constructors
+vcall_in_ctor="enabled"
+; Check for useless user defined initializers
+useless_initializer="disabled"
+; Check allman brace style
+allman_braces_check="disabled"
+; Check for redundant attributes
+redundant_attributes_check="disabled"
+; Check for public declarations without a documented unittest
+has_public_example="disabled"
+; Check for asserts without an explanatory message
+assert_without_msg="disabled"
+; Check indent of if constraints
+if_constraints_indent="enabled"
+; Check for @trusted applied to a bigger scope than a single function
+trust_too_much="disabled"
+; Check for redundant storage classes on variable declarations")
+redundant_storage_classes="enabled"
+; Check for unused function return values
+unused_result="disabled"