Init

.github/workflows/test.yml

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+name: test
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: "26.0.2"
+          gleam-version: "1.4.1"
+          rebar3-version: "3"
+          # elixir-version: "1.15.4"
+      - run: gleam deps download
+      - run: gleam test
+      - run: gleam format --check src test

.gitignore

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+*.beam
+*.ez
+/build
+erl_crash.dump

README.md

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+# platform
+
+[![Package Version](https://img.shields.io/hexpm/v/platform)](https://hex.pm/packages/platform)
+[![Hex Docs](https://img.shields.io/badge/hex-docs-ffaff3)](https://hexdocs.pm/platform/)
+
+```sh
+gleam add platform@1
+```
+```gleam
+import platform
+
+pub fn main() {
+  // TODO: An example of the project in use
+}
+```
+
+Further documentation can be found at <https://hexdocs.pm/platform>.
+
+## Development
+
+```sh
+gleam run   # Run the project
+gleam test  # Run the tests
+```

gleam.toml

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+name = "platform"
+version = "1.0.0"
+
+# Fill out these fields if you intend to generate HTML documentation or publish
+# your project to the Hex package manager.
+#
+description = "Zero dependency platform detection library for gleam"
+licences = ["Apache-2.0"]
+repository = { type = "github", user = "ditherwither", repo = "platform" }
+# links = [{ title = "Website", href = "" }]
+#
+# For a full reference of all the available options, you can have a look at
+# https://gleam.run/writing-gleam/gleam-toml/.
+
+[dependencies]
+gleam_stdlib = ">= 0.34.0 and < 2.0.0"
+
+[dev-dependencies]
+gleeunit = ">= 1.0.0 and < 2.0.0"

manifest.toml

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+# This file was generated by Gleam
+# You typically do not need to edit this file
+
+packages = [
+  { name = "gleam_stdlib", version = "0.40.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "86606B75A600BBD05E539EB59FABC6E307EEEA7B1E5865AFB6D980A93BCB2181" },
+  { name = "gleeunit", version = "1.2.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "F7A7228925D3EE7D0813C922E062BFD6D7E9310F0BEE585D3A42F3307E3CFD13" },
+]
+
+[requirements]
+gleam_stdlib = { version = ">= 0.34.0 and < 2.0.0" }
+gleeunit = { version = ">= 1.0.0 and < 2.0.0" }

src/platform.gleam

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+import gleam/io
+import gleam/string
+
+pub type Runtime {
+  Erlang
+  Node
+  Bun
+  Deno
+  Browser
+  OtherRuntime(String)
+}
+
+pub type Os {
+  Aix
+  Darwin
+  FreeBsd
+  Linux
+  OpenBsd
+  SunOs
+  Win32
+  OtherOs(String)
+}
+
+// Architecture list from node's docs
+
+pub type Arch {
+  Arm
+  Arm64
+  X86
+  X64
+  Loong64
+  Mips
+  MipsLittleEndian
+  PPC
+  PPC64
+  RiscV64
+  S390
+  S390X
+  OtherArch(String)
+}
+
+@external(erlang, "platform_ffi", "runtime")
+@external(javascript, "./platform_ffi.mjs", "runtime")
+fn runtime_() -> String
+
+@external(erlang, "platform_ffi", "os")
+@external(javascript, "./platform_ffi.mjs", "os")
+fn os_() -> String
+
+@external(erlang, "platform_ffi", "arch")
+@external(javascript, "./platform_ffi.mjs", "arch")
+fn arch_() -> String
+
+pub fn runtime() -> Runtime {
+  case runtime_() {
+    "erlang" -> Erlang
+    "node" -> Node
+    "bun" -> Bun
+    "deno" -> Deno
+    "browser" -> Browser
+    runtime -> OtherRuntime(runtime)
+  }
+}
+
+pub fn os() -> Os {
+  case os_() {
+    "aix" | "aix" <> _ -> Aix
+    "darwin" | "darwin" <> _ -> Darwin
+    "freebsd" | "freebsd" <> _ -> FreeBsd
+    "linux" | "linux" <> _ -> Linux
+    "openbsd" | "openbsd" <> _ -> OpenBsd
+    "sunos" | "sunos" <> _ -> SunOs
+    "win" | "win" <> _ -> Win32
+    os -> OtherOs(os)
+  }
+}
+
+pub fn arch() -> Arch {
+  case string.lowercase(arch_()) {
+    "arm" -> Arm
+    "arm64" | "aarch64" -> Arm64
+    "x86" | "ia32" -> X86
+    "x64" | "x86_64" | "amd64" -> X64
+    "loong64" -> Loong64
+    "mips" -> Mips
+    "mipsel" -> MipsLittleEndian
+    "ppc" -> PPC
+    "ppc64" -> PPC64
+    "riscv64" -> RiscV64
+    "s390" -> S390
+    "s390x" -> S390X
+    arch -> OtherArch(arch)
+  }
+}
+
+pub fn main() {
+  // io.debug("Runtime")
+  io.debug(runtime())
+  // io.debug("Os")
+  io.debug(os())
+  // io.debug("Arch")
+  io.debug(arch())
+}

src/platform_ffi.erl

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+-module(platform_ffi).
+-export([runtime/0, os/0, arch/0]).
+
+runtime() -> unicode:characters_to_binary("erlang").
+
+os() ->
+    ArchitectureString = erlang:system_info(system_architecture),
+    Tokens = string:tokens(ArchitectureString, "-"),
+    unicode:characters_to_binary(
+        case length(Tokens) of
+            3 -> lists:nth(3, Tokens);
+            2 -> lists:nth(2, Tokens)
+        end
+    ).
+
+arch() ->
+    ArchitectureString = erlang:system_info(system_architecture),
+    [CpuArch | _] = string:tokens(ArchitectureString, "-"),
+    unicode:characters_to_binary(CpuArch).

src/platform_ffi.mjs

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+"use strict";
+
+export function runtime() {
+  if (globalThis.Deno) {
+    return "deno";
+  }
+  if (globalThis.Bun) {
+    return "bun";
+  }
+  if (globalThis.process?.release?.name === "node") {
+    return "node";
+  }
+
+  if (window !== "undefined" && typeof window.document !== "undefined") {
+    return "browser";
+  }
+
+  return "unknown";
+
+}
+
+export function os() {
+    const currentRuntime = runtime();
+
+    if (currentRuntime === "node" || currentRuntime === "bun") {
+        return process.platform;
+    }
+    if (currentRuntime === "browser") {
+        // TODO get browser's host os using user agent data
+        return "unknown";
+    }
+    // if (currentRuntime === "deno") {
+    //     const {platform} = await import("node:process")
+    //     return platform;
+    // }
+    return "unknown";
+}
+
+export function arch() {
+    const currentRuntime = runtime();
+
+    if (currentRuntime === "node" || currentRuntime === "bun") {
+        return process.arch;
+    }
+    // if (currentRuntime === "deno") {
+    //     const {arch} = await import("node:process")
+    //     return arch;
+    // }
+    if (currentRuntime === "browser") {
+        // TODO get browser's architecture using user agent data
+        return "unknown";
+    }
+
+    return "unknown";
+}

test/platform_test.gleam

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+import gleeunit
+import gleeunit/should
+
+pub fn main() {
+  gleeunit.main()
+}
+
+// gleeunit test functions end in `_test`
+pub fn hello_world_test() {
+  1
+  |> should.equal(1)
+}