Add bazel build system support

.gitignore

@@ -3,6 +3,7 @@
 *.user
 .vscode/
 
+bazel-*
 build/
 dist/
 *.egg-info/

BUILD

@@ -0,0 +1,9 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+cc_library(
+    name = "tidal",
+    hdrs = ["include/tidal/tidal.h"],
+    strip_include_prefix = "include",
+    visibility = ["//visibility:public"],
+    deps = ["@eigen3"],
+)

WORKSPACE

@@ -0,0 +1,18 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+EIGEN_TAG = "3.4.0"
+EIGEN_SHA = "1ccaabbfe870f60af3d6a519c53e09f3dcf630207321dffa553564a8e75c4fc8"
+http_archive(
+    name = "eigen3",
+    build_file_content = """
+cc_library(
+    name = 'eigen3',
+    includes = ['.'],
+    hdrs = glob(['Eigen/**']),
+    visibility = ['//visibility:public'],
+)
+""",
+    sha256 = EIGEN_SHA,
+    strip_prefix = "eigen-{}".format(EIGEN_TAG),
+    urls = ["https://gitlab.com/libeigen/eigen/-/archive/{0}/eigen-{0}.zip".format(EIGEN_TAG)],
+)

examples/BUILD

@@ -0,0 +1,7 @@
+load("@rules_cc//cc:defs.bzl", "cc_binary")
+
+cc_binary(
+    name = "example",
+    srcs = ["example.cpp"],
+    deps = ["//:tidal"],
+)