This showcases how to build a single file to create a runnable application.
This BUILD file shows that we want to build a C++ binary using the cc_binary rule provided by Bazel.
The name of the binary will be hello-world
In the cc_binary rule, let's name the binary hello-world, and provide the required source files in the srcs attribute.
cc_binary(
name = "hello-world",
srcs = ["src/hello-world.cc"],
)
bazel build //:hello-world
If the build is successful, Bazel prints the following output:
± |master U:1 ✗| → bazel build //:hello-world
INFO: Analysed target //:hello-world (7 packages loaded).
INFO: Found 1 target...
Target //:hello-world up-to-date:
bazel-bin/hello-world
INFO: Elapsed time: 1.386s, Critical Path: 0.80s
INFO: 3 processes: 2 linux-sandbox, 1 local.
INFO: Build completed successfully, 62 total actions
In the run log above you can see where the executable was built so you can locate it and use it.
Adding a submodule and using that. Here I am using immer project to be used inside my hello-world project.
add gitsubmodule
adding the submodule.
git submodule add git@github.com:bansalnvn/immer external/
this repo already has a bazel BUILD file which exports the immer library and visibility is defined to public.
in hello-world we can set the dependency as
deps = [
":hello-add",
"@immer//:immer"]
Last thing we need to setup the location of the target immer in the WORKSPACE file as follows.
local_repository(
name = "immer",
path = "external/immer",
)
and now we should be able to use immer library in our hello world project.