feat(bazel): incorporate wasm filters into bazel build [KAG-4210] (#1…

…2853)

* feat(bazel): add wasm filters to build

* fix(bazel): mv wasm filters to kong/filters

Co-authored-by: Michael Martin <[email protected]>

* fix(bazel): filter file renaming

Co-authored-by: Michael Martin <[email protected]>

* chore(wasm): response_transofmrer filter 0.1.2

* fix(bazel): filter typo

* feat(wasm): swap to datakit filter

* fix(bazel): rename wasm filters repo

* fix(bazel): mv wasm filters to kong/wasm

---------

Co-authored-by: Michael Martin <[email protected]>

build/BUILD.bazel

@@ -1,6 +1,7 @@
 load("@kong_bindings//:variables.bzl", "KONG_VAR")
 load("@bazel_skylib//lib:selects.bzl", "selects")
 load("//build:build_system.bzl", "kong_directory_genrule", "kong_rules_group", "kong_template_file")
+load("@kong//build/openresty/wasmx/filters:variables.bzl", "WASM_FILTERS_TARGETS")
 
 exports_files([
     "package/nfpm.yaml",
@@ -47,6 +48,18 @@ install_webui_cmd = select({
     "@kong//:skip_webui_flags": "\n",
 })
 
+install_wasm_filters_cmd = select({
+    "@kong//:wasmx_flag": """
+            mkdir -pv ${BUILD_DESTDIR}/kong/wasm
+        """ + " ".join(["""
+            tpath="$(locations %s)"
+            fname="$(echo "${tpath}" | cut -d'/' -f2)"
+
+            cp -v "$tpath" "${BUILD_DESTDIR}/kong/wasm/${fname}"
+        """ % t for t in WASM_FILTERS_TARGETS]),
+    "//conditions:default": "\n",
+})
+
 install_wasm_deps_cmd = select({
     "@kong//:wasmx_flag": """
     for fname in $(locations @ngx_wasmx_module//:lua_libs); do
@@ -99,7 +112,7 @@ kong_directory_genrule(
         "@kong//:wasmx_flag": [
             "@ngx_wasmx_module//:lua_libs",
             "@openresty//:wasm_runtime",
-        ],
+        ] + WASM_FILTERS_TARGETS,
         "//conditions:default": [],
     }) + lib_deps + lualib_deps,
     cmd =
@@ -147,7 +160,14 @@ kong_directory_genrule(
 
         cp -r $(locations @protoc//:all_srcs) ${BUILD_DESTDIR}/kong/.
 
-    """ + install_lib_deps_cmd + install_lualib_deps_cmd + install_webui_cmd + link_modules_dir + install_wasm_deps_cmd + """
+    """ +
+        install_lib_deps_cmd +
+        install_lualib_deps_cmd +
+        install_webui_cmd +
+        link_modules_dir +
+        install_wasm_filters_cmd +
+        install_wasm_deps_cmd +
+        """
         mkdir -p ${BUILD_DESTDIR}/etc/kong
         cp kong.conf.default ${BUILD_DESTDIR}/etc/kong/kong.conf.default
 

build/openresty/BUILD.openresty.bazel

@@ -3,6 +3,7 @@ load("@bazel_skylib//lib:selects.bzl", "selects")
 load("@kong//build/openresty/wasmx:rules.bzl", "wasm_runtime", "wasmx_configure_options", "wasmx_env")
 load("@openresty_binding//:variables.bzl", "LUAJIT_VERSION")
 load("@kong_bindings//:variables.bzl", "KONG_VAR")
+load("@kong//build/openresty/wasmx/filters:variables.bzl", "WASM_FILTERS_TARGETS")
 
 filegroup(
     name = "luajit_srcs",
@@ -274,7 +275,7 @@ configure_make(
             # wasm_runtime has to be a "data" (target) instead of "build_data" (exec)
             # to be able to lookup by its path (relative to INSTALLDIR)
             ":wasm_runtime",
-        ],
+        ] + WASM_FILTERS_TARGETS,
         "//conditions:default": [],
     }),
     env = wasmx_env,

build/openresty/repositories.bzl

@@ -8,6 +8,7 @@ load("//build/openresty/pcre:pcre_repositories.bzl", "pcre_repositories")
 load("//build/openresty/openssl:openssl_repositories.bzl", "openssl_repositories")
 load("//build/openresty/atc_router:atc_router_repositories.bzl", "atc_router_repositories")
 load("//build/openresty/wasmx:wasmx_repositories.bzl", "wasmx_repositories")
+load("//build/openresty/wasmx/filters:repositories.bzl", "wasm_filters_repositories")
 load("//build/openresty/brotli:brotli_repositories.bzl", "brotli_repositories")
 
 # This is a dummy file to export the module's repository.
@@ -24,6 +25,7 @@ def openresty_repositories():
     openssl_repositories()
     atc_router_repositories()
     wasmx_repositories()
+    wasm_filters_repositories()
     brotli_repositories()
 
     openresty_version = KONG_VAR["OPENRESTY"]

build/openresty/wasmx/filters/BUILD.bazel

@@ -0,0 +1,14 @@
+load("@kong//build/openresty/wasmx/filters:variables.bzl", "WASM_FILTERS_TARGETS")
+
+filegroup(
+    name = "all_srcs",
+    srcs = glob(
+        include = ["**"],
+        exclude = ["*.bazel"],
+    ),
+)
+
+exports_files(
+    WASM_FILTERS_TARGETS,
+    visibility = ["//visibility:public"],
+)

build/openresty/wasmx/filters/repositories.bzl

@@ -0,0 +1,19 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+load(":variables.bzl", "WASM_FILTERS")
+
+def wasm_filters_repositories():
+    for filter in WASM_FILTERS:
+        for file in filter["files"].keys():
+            renamed_file = file.replace("filter", filter["name"])
+
+            maybe(
+                http_file,
+                name = renamed_file,
+                url = "https://github.com/%s/releases/download/%s/%s" % (
+                    filter["repo"],
+                    filter["tag"],
+                    file,
+                ),
+                sha256 = filter["files"][file],
+            )

build/openresty/wasmx/filters/variables.bzl

@@ -0,0 +1,23 @@
+"""
+A list of wasm filters.
+"""
+
+WASM_FILTERS = [
+    {
+        "name": "datakit-filter",
+        "repo": "Kong/datakit-filter",
+        "tag": "0.1.0",
+        "files": {
+            "datakit.meta.json": "b9f3b6d51d9566fae1a34c0e5c00f0d5ad5dc8f6ce7bf81931fd0be189de205d",
+            "datakit.wasm": "a494c254915e222c3bd2b36944156680b4534bdadf438fb2143df9e0a4ef60ad",
+        },
+    },
+]
+
+WASM_FILTERS_TARGETS = [
+    [
+        "@%s//file" % file
+        for file in filter["files"].keys()
+    ]
+    for filter in WASM_FILTERS
+][0]