Bazel: reorganization

* fixed 5.0.0 as bazel version
* made dependencies better loadable
* moved `//swift/install` to `//swift:create-extractor-pack` (following
  the clearer ruby naming)
* renamed `extractor_pack` to `extractor-pack` for consistency with Ruby

.bazelversion

@@ -0,0 +1 @@
+5.0.0

WORKSPACE.bazel

@@ -3,30 +3,10 @@
 
 workspace(name = "ql")
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "rules_pkg",
-    sha256 = "62eeb544ff1ef41d786e329e1536c1d541bb9bcad27ae984d57f18f314018e66",
-    urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_pkg/releases/download/0.6.0/rules_pkg-0.6.0.tar.gz",
-        "https://github.com/bazelbuild/rules_pkg/releases/download/0.6.0/rules_pkg-0.6.0.tar.gz",
-    ],
-)
-
-load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
-
-rules_pkg_dependencies()
-
-http_archive(
-    name = "platforms",
-    sha256 = "460caee0fa583b908c622913334ec3c1b842572b9c23cf0d3da0c2543a1a157d",
-    urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/platforms/releases/download/0.0.3/platforms-0.0.3.tar.gz",
-        "https://github.com/bazelbuild/platforms/releases/download/0.0.3/platforms-0.0.3.tar.gz",
-    ],
-)
-
 load("@ql//misc/bazel:workspace.bzl", "ql_workspace")
 
 ql_workspace()
+
+load("@ql//misc/bazel:workspace_deps.bzl", "ql_workspace_deps")
+
+ql_workspace_deps()

misc/bazel/BUILD.toolchain.tpl

@@ -0,0 +1,12 @@
+load("@//misc/bazel:toolchain.bzl", "codeql_cli_toolchain")
+
+codeql_cli_toolchain(
+    name = "codeql-cli",
+    path = "{codeql_cli_path}",
+)
+
+toolchain(
+    name = "codeql-cli-toolchain",
+    toolchain = ":codeql-cli",
+    toolchain_type = "@//:toolchain_type",
+)

misc/bazel/test.bzl

@@ -0,0 +1,38 @@
+def _test_script_impl(ctx):
+    output = ctx.actions.declare_file("%s.py" % ctx.label.name)
+    codeql_cli_path = ctx.toolchains["//:toolchain_type"].codeql_cli.path
+    ctx.actions.expand_template(
+        template = ctx.file._template,
+        output = output,
+        substitutions = {
+            "{codeql_cli_path}": codeql_cli_path,
+            "{test_sources}": str([f.path for f in ctx.files.srcs]),
+        },
+    )
+    return DefaultInfo(
+        files = depset([output]),
+    )
+
+_test_script = rule(
+    implementation = _test_script_impl,
+    attrs = {
+        "srcs": attr.label_list(allow_files = True),
+        "_template": attr.label(default = "//misc/bazel:test.template.py", allow_single_file = True),
+    },
+    toolchains = ["//:toolchain_type"],
+)
+
+def codeql_test(*, name, srcs, deps):
+    srcs = native.glob(["test/**/*.ql", "test/**/*.qlref"])
+    data = srcs + deps
+    script = name + "-script"
+    _test_script(
+        name = script,
+        srcs = srcs,
+    )
+    native.py_test(
+        name = name,
+        main = script + ".py",
+        srcs = [script],
+        data = data,
+    )

misc/bazel/test.template.py

@@ -0,0 +1,3 @@
+import os
+
+os.execl("{codeql_cli_path}", "test", "run", "--check-databases", "--", *{test_sources})

misc/bazel/workspace.bzl

@@ -1,3 +1,6 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+
 def _ql_utils_impl(repository_ctx):
     root = repository_ctx.path(Label("//:WORKSPACE.bazel")).realpath.dirname
     repository_ctx.file("BUILD.bazel")
@@ -12,4 +15,24 @@ _ql_utils = repository_rule(
 )
 
 def ql_workspace():
-    _ql_utils(name = "utils")
+    _ql_utils(name = "ql_utils")
+
+    maybe(
+        repo_rule = http_archive,
+        name = "rules_pkg",
+        sha256 = "62eeb544ff1ef41d786e329e1536c1d541bb9bcad27ae984d57f18f314018e66",
+        urls = [
+            "https://mirror.bazel.build/github.com/bazelbuild/rules_pkg/releases/download/0.6.0/rules_pkg-0.6.0.tar.gz",
+            "https://github.com/bazelbuild/rules_pkg/releases/download/0.6.0/rules_pkg-0.6.0.tar.gz",
+        ],
+    )
+
+    maybe(
+        repo_rule = http_archive,
+        name = "platforms",
+        sha256 = "460caee0fa583b908c622913334ec3c1b842572b9c23cf0d3da0c2543a1a157d",
+        urls = [
+            "https://mirror.bazel.build/github.com/bazelbuild/platforms/releases/download/0.0.3/platforms-0.0.3.tar.gz",
+            "https://github.com/bazelbuild/platforms/releases/download/0.0.3/platforms-0.0.3.tar.gz",
+        ],
+    )

misc/bazel/workspace_deps.bzl

@@ -0,0 +1,4 @@
+load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
+
+def ql_workspace_deps():
+    rules_pkg_dependencies()

swift/.codeqlmanifest.json

@@ -2,6 +2,6 @@
   "provide": [
     "ql/lib/qlpack.yml",
     "ql/test/qlpack.yml",
-    "extractor_pack/codeql-extractor.yml"
+    "extractor-pack/codeql-extractor.yml"
   ]
 }

swift/.gitignore

@@ -1 +1 @@
-extractor_pack
+extractor-pack

swift/BUILD.bazel

@@ -1,5 +1,7 @@
 load("@rules_pkg//:mappings.bzl", "pkg_attributes", "pkg_filegroup", "pkg_files")
+load("@rules_pkg//:install.bzl", "pkg_install")
 load("@ql//:defs.bzl", "codeql_platform")
+load("@ql_utils//:source_dir.bzl", "current_source_dir")
 
 pkg_files(
     name = "dbscheme",
@@ -52,3 +54,12 @@ pkg_filegroup(
     ],
     visibility = ["//visibility:public"],
 )
+
+pkg_install(
+    name = "create-extractor-pack",
+    srcs = ["//swift:extractor-pack"],
+    args = [
+        "--destdir",
+        current_source_dir() + "/extractor-pack",
+    ],
+)

swift/README.md

@@ -4,5 +4,6 @@ The Swift codeql package is an experimental and unsupported work in progress.
 
 ## Usage
 
-Run `bazel run //swift/install`, which will install `swift/extractor_pack`. Using `--search-path=swift` will then pick
-up the Swift extractor.
+Run `bazel run //swift:create-extractor-pack`, which will install `swift/extractor-pack`.
+Using `--search-path=swift/extractor-pack` will then pick up the Swift extractor. You can also use
+`--search-path=swift`, as the extractor pack is mentioned in `swift/.codeqlmanifest`.

swift/install/BUILD.bazel

@@ -1,11 +0,0 @@
-load("@utils//:source_dir.bzl", "current_source_dir")
-load("@rules_pkg//:install.bzl", "pkg_install")
-
-pkg_install(
-    name = "install",
-    srcs = ["//swift:extractor-pack"],
-    args = [
-        "--destdir",
-        current_source_dir() + "/../extractor_pack",
-    ],
-)