Allow for configurable tools using `select`

[TroyKomodo]

Some tools are platform specific (not on macos but on linux).

bazel_env(
    name = "bazel_env",
    tools = {
        "cargo": "//tools/cargo",
        "cargo-deny": "//tools/cargo/deny",
        "cargo-insta": "//tools/cargo/insta",
        "buf": "//tools/buf",
        "buildifier": "//tools/buildifier",
        "dprint": "//tools/dprint",
        "protoc": "//tools/protoc",
        "node": "//tools/node",
        "pnpm": "//tools/pnpm",
        "just": "//tools/just",
        "miniserve": "//tools/miniserve",
        "valgrind": "//tools/valgrind",
        "ibazel": "//tools/ibazel",
        "bazel-diff": "//tools/bazel-diff",
        "rust-analyzer": "//tools/rust-analyzer",
        "rust-analyzer-discover": "//tools/rust-analyzer:discover",
        "rust-analyzer-check": "//tools/rust-analyzer:check",
        "shfmt": "//tools/shfmt",
        "diesel": "//tools/diesel",
    } | select({
        "@platforms//os:linux": {
            "ffmpeg": "//tools/ffmpeg",
            "ffprobe": "//tools/ffmpeg:ffprobe",
        },
        "@platforms//os:windows": {
            "ffmpeg": "//tools/ffmpeg",
            "ffprobe": "//tools/ffmpeg:ffprobe",
        },
        "//conditions:default": {},
    }),
)

In my case.

[TroyKomodo]

Resorted to this.

load("@bazel_env.bzl", "bazel_env")

common_tools = {
    "cargo": "//tools/cargo",
    "cargo-deny": "//tools/cargo/deny",
    "cargo-insta": "//tools/cargo/insta",
    "buf": "//tools/buf",
    "buildifier": "//tools/buildifier",
    "dprint": "//tools/dprint",
    "protoc": "//tools/protoc",
    "node": "//tools/node",
    "pnpm": "//tools/pnpm",
    "just": "//tools/just",
    "miniserve": "//tools/miniserve",
    "valgrind": "//tools/valgrind",
    "ibazel": "//tools/ibazel",
    "bazel-diff": "//tools/bazel-diff",
    "rust-analyzer": "//tools/rust-analyzer",
    "rust-analyzer-discover": "//tools/rust-analyzer:discover",
    "rust-analyzer-check": "//tools/rust-analyzer:check",
    "shfmt": "//tools/shfmt",
    "diesel": "//tools/diesel",
}

bazel_env(
    name = "bazel_env_linux",
    tools = common_tools | {
        "ffmpeg": "//tools/ffmpeg",
        "ffprobe": "//tools/ffmpeg:ffprobe",
    },
    tags = ["manual"],
    target_compatible_with = ["@platforms//os:linux"],
)

bazel_env(
    name = "bazel_env_macos",
    tools = common_tools,
    tags = ["manual"],
    target_compatible_with = ["@platforms//os:macos"],
)

alias(
    name = "bazel_env",
    actual = select({
        "@platforms//os:linux": ":bazel_env_linux",
        "@platforms//os:macos": ":bazel_env_macos",
        "//conditions:default": "@platforms//:incompatible",
    }),
    tags = ["manual"],
    visibility = ["//visibility:public"],
)

And in envrc

case "$(uname -s)" in
  Linux)
    platform_name="linux"
    ;;
  Darwin)
    platform_name="macos"
    ;;
  *)
    log_error "ERROR[.envrc]: Unsupported platform: $(uname -s)"
    ;;
esac

bazel_env_bin_dir="target-bazel/out/bazel_env-opt-ST-6691f78f59fa/bin/tools/bazel_env_${platform_name}/bin"
watch_file "${bazel_env_bin_dir}"
PATH_add "${bazel_env_bin_dir}"
if [[ ! -d "${bazel_env_bin_dir}" ]]; then
  log_error "ERROR[bazel_env.bzl]: Run 'bazel run //:bazel_env' to regenerate ${bazel_env_bin_dir}"
fi