Add Bazel support. (yskopets#18)

Signed-off-by: Shikugawa <Shikugawa@gmail.com>
Signed-off-by: Piotr Sikora <piotrsikora@google.com>

.bazelrc

@@ -0,0 +1,2 @@
+# Force Bazel to use --target=wasm32-unknown-unknown.
+build --platforms=@io_bazel_rules_rust//rust/platform:wasm

.bazelversion

@@ -0,0 +1 @@
+3.4.1

.github/workflows/rust.yml

@@ -103,3 +103,42 @@ jobs:
 
     - name: Package (publish)
       run: cargo +nightly publish --dry-run --target=wasm32-unknown-unknown
+
+  bazel:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cache
+      uses: actions/cache@v2
+      with:
+        path: |
+          ~/.cache/bazel
+          ~/.cache/bazelisk
+          ~/.cargo/.crates.toml
+          ~/.cargo/.crates2.json
+          ~/.cargo/bin
+          ~/.cargo/registry
+        key: ${{ hashFiles('WORKSPACE', '.bazelrc', '.bazelversion', 'cargo/Cargo.lock') }}
+
+    - name: Build
+      run: |
+        bazelisk build //...
+
+    - name: Format (buildifier)
+      run: |
+        GO111MODULE=on go get -u github.com/bazelbuild/buildtools/buildifier@3.4.0
+        export PATH=$PATH:$(go env GOPATH)/bin
+        buildifier -mode=check WORKSPACE
+        buildifier -mode=check BUILD
+        buildifier -mode=check examples/BUILD
+
+    - name: Format (cargo raze)
+      run: |
+        cargo install cargo-raze --version 0.3.8
+        cp -p cargo/Cargo.lock .
+        rm -rf cargo/
+        cargo raze --output=cargo
+        mv Cargo.lock cargo/
+        git diff --exit-code

.gitignore

@@ -1,2 +1,3 @@
+/bazel-*
 /target
-Cargo.lock
+/Cargo.lock

BUILD

@@ -0,0 +1,13 @@
+load("@io_bazel_rules_rust//rust:rust.bzl", "rust_library")
+
+rust_library(
+    name = "proxy_wasm",
+    srcs = glob(["src/*.rs"]),
+    edition = "2018",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//cargo:hashbrown",
+        "//cargo:log",
+        "//cargo:wee_alloc",
+    ],
+)

Cargo.toml

@@ -21,6 +21,14 @@ lto = true
 opt-level = 3
 panic = "abort"
 
+[raze]
+workspace_path = "//cargo"
+target = "wasm32-unknown-unknown"
+genmode = "Remote"
+
+[raze.crates.log.'0.4.11']
+additional_flags = ["--cfg=atomic_cas"]
+
 [[example]]
 name = "hello_world"
 path = "examples/hello_world.rs"

WORKSPACE

@@ -0,0 +1,37 @@
+workspace(name = "proxy_wasm_rust_sdk")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "bazel_skylib",
+    sha256 = "97e70364e9249702246c0e9444bccdc4b847bed1eb03c5a3ece4f83dfe6abc44",
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.0.2/bazel-skylib-1.0.2.tar.gz",
+        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.0.2/bazel-skylib-1.0.2.tar.gz",
+    ],
+)
+
+load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
+
+bazel_skylib_workspace()
+
+http_archive(
+    name = "io_bazel_rules_rust",
+    sha256 = "484a2b2b67cd2d1fa1054876de7f8d291c4b203fd256bc8cbea14d749bb864ce",
+    # Last commit where "out_binary = True" works.
+    # See: https://github.com/bazelbuild/rules_rust/issues/386
+    strip_prefix = "rules_rust-fda9a1ce6482973adfda022cadbfa6b300e269c3",
+    url = "https://github.com/bazelbuild/rules_rust/archive/fda9a1ce6482973adfda022cadbfa6b300e269c3.tar.gz",
+)
+
+load("@io_bazel_rules_rust//rust:repositories.bzl", "rust_repositories")
+
+rust_repositories()
+
+load("@io_bazel_rules_rust//:workspace.bzl", "bazel_version")
+
+bazel_version(name = "bazel_version")
+
+load("//cargo:crates.bzl", "raze_fetch_remote_crates")
+
+raze_fetch_remote_crates()

cargo/BUILD

@@ -0,0 +1,30 @@
+"""
+cargo-raze workspace build file.
+
+DO NOT EDIT! Replaced on runs of cargo-raze
+"""
+package(default_visibility = ["//visibility:public"])
+
+licenses([
+  "notice" # See individual crates for specific licenses
+])
+alias(
+    name = "chrono",
+    actual = "@raze__chrono__0_4_13//:chrono",
+    tags = ["cargo-raze"],
+)
+alias(
+    name = "hashbrown",
+    actual = "@raze__hashbrown__0_7_2//:hashbrown",
+    tags = ["cargo-raze"],
+)
+alias(
+    name = "log",
+    actual = "@raze__log__0_4_11//:log",
+    tags = ["cargo-raze"],
+)
+alias(
+    name = "wee_alloc",
+    actual = "@raze__wee_alloc__0_4_5//:wee_alloc",
+    tags = ["cargo-raze"],
+)