Add Bazel build file implementation (#419)

README.md

@@ -114,6 +114,69 @@ git checkout tags/$TAG -b $TAG
 # clean, if you need to troubleshoot build dependencies by using `make clean`
 ```
 
+## Build using Bazel
+
+[Bazel](https://bazel.build) is also supported as a build option for getting a packaged release of the xcframework compiled for either static or dynamic linking.
+
+Firstly you will have to ensure that Bazel is installed
+
+`brew install baselisk`
+
+From there you can use the script in platform/ios/platform/ios/scripts/package-bazel.sh
+
+# There are 4 options:
+
+`cd platform/ios/platform/ios/scripts`
+
+Static xcframework compiled for release (this is default if no parameters are provided):
+`./bazel-package.sh --static --release`
+
+Static xcframework compiled for debug:
+`./bazel-package.sh --static --debug`
+
+Dynamic xcframework compiled for release:
+`./bazel-package.sh --dynamic --release`
+
+Dynamic xcframework compiled for debug:
+`./bazel-package.sh --dynamic --debug`
+
+All compiled frameworks will end up in the `bazel-bin/platform/ios/` path from the root of the repo.
+
+Also you can use the link option to ensure that the framework is able to link.
+
+`./bazel-package.sh --link`
+
+# Bazel build files are placed in a few places throughout the project:
+
+`BUILD.bazel`
+- Covering the base cpp in the root `src` directory.
+
+`vendor/BUILD.bazel`
+- Covering the submodule dependencies of Maplibre.
+
+`platform/default/BUILD.bazel`
+- Covering the cpp dependencies in default.
+
+`platform/darwin/BUILD.bazel`
+- Covering the cpp source in platform/default.
+
+`platform/ios/platform/ios/vendor/`
+- Covering the iOS specific dependencies.
+
+`platform/ios/BUILD.bazel`
+- Covering the source in `platform/ios/platform/ios/src` and `platform/ios/platform/darwin/src` as well as defining all the other BUILD.bazel files and defining the xcframework targets.
+
+# There are also some other areas that make bazel work:
+
+`WORKSPACE`
+- Defines the "repo" and the different modules that are loaded in order to compile for Apple.
+
+`.bazelversion`
+- Defines the version of bazel used, important for specific support for Apple targets.
+
+`bazel/flags.bzl`
+- Defines some compilation flags that are used between the different build files. 
+
 ### Android
 
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