Initial commit 🎉

10 files changed, 424 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b428354
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/release*
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..65b9f32
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Sakarias Johansson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..fe76061
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,66 @@
+let
+  sources = import ./nix/sources.nix;
+  nixpkgs = with
+    {
+      overlay = _: pkgs:
+        {
+          niv = (import sources.niv { }).niv;
+        };
+    };
+    import sources.nixpkgs
+      {
+        overlays = [ overlay (import sources.rust) ];
+        config = { };
+      };
+
+  rustBin = nixpkgs.rust-bin.stable."1.65.0".rust;
+
+  # rust-analyzer cannot handle symlinks
+  # so we need to create a derivation with the
+  # correct rust source without symlinks
+  rustSrcNoSymlinks = nixpkgs.stdenv.mkDerivation {
+    name = "rust-src-no-symlinks";
+
+    rustWithSrc = (rustBin.override {
+      extensions = [ "rust-src" ];
+    });
+    rust = rustBin;
+
+    builder = builtins.toFile "builder.sh" ''
+      source $stdenv/setup
+      mkdir -p $out
+      cp -r -L $rustWithSrc/lib/rustlib/src/rust/library/. $out/
+      '';
+  };
+in
+nixpkgs.stdenv.mkDerivation {
+  name = "racer-tracer";
+  src = nixpkgs.nix-gitignore.gitignoreSource [] ./racer-tracer;
+  nativeBuildInputs = [ rustBin nixpkgs.cacert nixpkgs.xorg.libX11 ];
+  configurePhase = ''
+    export CARGO_HOME=$PWD
+  '';
+
+  buildPhase = ''
+    cargo build --release
+  '';
+
+  checkPhase = ''
+    cargo fmt -- --check
+    cargo clippy
+    cargo test
+  '';
+
+  doCheck = true;
+
+  installPhase = ''
+    mkdir -p $out/bin
+    find target/release -executable -type f -exec cp {} $out/bin \;
+  '';
+
+  shellHook = ''
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${nixpkgs.lib.makeLibraryPath [ nixpkgs.xorg.libX11 nixpkgs.xorg.libXcursor ] }
+    #export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib64/
+    export RUST_SRC_PATH=${rustSrcNoSymlinks}
+  '';
+}
diff --git a/nix/sources.json b/nix/sources.json
new file mode 100644
index 0000000..de0bdb3
--- /dev/null
+++ b/nix/sources.json
@@ -0,0 +1,38 @@
+{
+    "niv": {
+        "branch": "master",
+        "description": "Easy dependency management for Nix projects",
+        "homepage": "https://github.com/nmattia/niv",
+        "owner": "nmattia",
+        "repo": "niv",
+        "rev": "351d8bc316bf901a81885bab5f52687ec8ccab6e",
+        "sha256": "1yzhz7ihkh6p2sxhp3amqfbmm2yqzaadqqii1xijymvl8alw5rrr",
+        "type": "tarball",
+        "url": "https://github.com/nmattia/niv/archive/351d8bc316bf901a81885bab5f52687ec8ccab6e.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "nixpkgs": {
+        "branch": "release-21.11",
+        "description": "Nix Packages collection",
+        "homepage": "",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a7ecde854aee5c4c7cd6177f54a99d2c1ff28a31",
+        "sha256": "sha256:162dywda2dvfj1248afxc45kcrg83appjd0nmdb541hl7rnncf02",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/a7ecde854aee5c4c7cd6177f54a99d2c1ff28a31.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "rust": {
+        "branch": "master",
+        "description": "Pure and reproducible nix overlay of binary distributed rust toolchains",
+        "homepage": "",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "9767af967a0becaa3bb79eeda838dbf81295eb62",
+        "sha256": "00jbn8c8mzhf73n8ny2j7y44m181v0vip1qjhc2qkvdv6v1wnhs6",
+        "type": "tarball",
+        "url": "https://github.com/oxalica/rust-overlay/archive/9767af967a0becaa3bb79eeda838dbf81295eb62.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}
diff --git a/nix/sources.nix b/nix/sources.nix
new file mode 100644
index 0000000..1938409
--- /dev/null
+++ b/nix/sources.nix
@@ -0,0 +1,174 @@
+# This file has been generated by Niv.
+
+let
+
+  #
+  # The fetchers. fetch_<type> fetches specs of type <type>.
+  #
+
+  fetch_file = pkgs: name: spec:
+    let
+      name' = sanitizeName name + "-src";
+    in
+      if spec.builtin or true then
+        builtins_fetchurl { inherit (spec) url sha256; name = name'; }
+      else
+        pkgs.fetchurl { inherit (spec) url sha256; name = name'; };
+
+  fetch_tarball = pkgs: name: spec:
+    let
+      name' = sanitizeName name + "-src";
+    in
+      if spec.builtin or true then
+        builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
+      else
+        pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
+
+  fetch_git = name: spec:
+    let
+      ref =
+        if spec ? ref then spec.ref else
+          if spec ? branch then "refs/heads/${spec.branch}" else
+            if spec ? tag then "refs/tags/${spec.tag}" else
+              abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!";
+    in
+      builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; };
+
+  fetch_local = spec: spec.path;
+
+  fetch_builtin-tarball = name: throw
+    ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=tarball -a builtin=true'';
+
+  fetch_builtin-url = name: throw
+    ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=file -a builtin=true'';
+
+  #
+  # Various helpers
+  #
+
+  # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695
+  sanitizeName = name:
+    (
+      concatMapStrings (s: if builtins.isList s then "-" else s)
+        (
+          builtins.split "[^[:alnum:]+._?=-]+"
+            ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name)
+        )
+    );
+
+  # The set of packages used when specs are fetched using non-builtins.
+  mkPkgs = sources: system:
+    let
+      sourcesNixpkgs =
+        import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; };
+      hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
+      hasThisAsNixpkgsPath = <nixpkgs> == ./.;
+    in
+      if builtins.hasAttr "nixpkgs" sources
+      then sourcesNixpkgs
+      else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
+        import <nixpkgs> {}
+      else
+        abort
+          ''
+            Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or
+            add a package called "nixpkgs" to your sources.json.
+          '';
+
+  # The actual fetching function.
+  fetch = pkgs: name: spec:
+
+    if ! builtins.hasAttr "type" spec then
+      abort "ERROR: niv spec ${name} does not have a 'type' attribute"
+    else if spec.type == "file" then fetch_file pkgs name spec
+    else if spec.type == "tarball" then fetch_tarball pkgs name spec
+    else if spec.type == "git" then fetch_git name spec
+    else if spec.type == "local" then fetch_local spec
+    else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
+    else if spec.type == "builtin-url" then fetch_builtin-url name
+    else
+      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
+
+  # If the environment variable NIV_OVERRIDE_${name} is set, then use
+  # the path directly as opposed to the fetched source.
+  replace = name: drv:
+    let
+      saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name;
+      ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}";
+    in
+      if ersatz == "" then drv else
+        # this turns the string into an actual Nix path (for both absolute and
+        # relative paths)
+        if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}";
+
+  # Ports of functions for older nix versions
+
+  # a Nix version of mapAttrs if the built-in doesn't exist
+  mapAttrs = builtins.mapAttrs or (
+    f: set: with builtins;
+    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
+  );
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
+  range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
+  stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
+  stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
+  concatMapStrings = f: list: concatStrings (map f list);
+  concatStrings = builtins.concatStringsSep "";
+
+  # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331
+  optionalAttrs = cond: as: if cond then as else {};
+
+  # fetchTarball version that is compatible between all the versions of Nix
+  builtins_fetchTarball = { url, name ? null, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchTarball;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
+      else
+        fetchTarball attrs;
+
+  # fetchurl version that is compatible between all the versions of Nix
+  builtins_fetchurl = { url, name ? null, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchurl;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
+      else
+        fetchurl attrs;
+
+  # Create the final "sources" from the config
+  mkSources = config:
+    mapAttrs (
+      name: spec:
+        if builtins.hasAttr "outPath" spec
+        then abort
+          "The values in sources.json should not have an 'outPath' attribute"
+        else
+          spec // { outPath = replace name (fetch config.pkgs name spec); }
+    ) config.sources;
+
+  # The "config" used by the fetchers
+  mkConfig =
+    { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
+    , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile)
+    , system ? builtins.currentSystem
+    , pkgs ? mkPkgs sources system
+    }: rec {
+      # The sources, i.e. the attribute set of spec name to spec
+      inherit sources;
+
+      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
+      inherit pkgs;
+    };
+
+in
+mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }
diff --git a/racer-tracer/.gitignore b/racer-tracer/.gitignore
new file mode 100644
index 0000000..767dae2
--- /dev/null
+++ b/racer-tracer/.gitignore
@@ -0,0 +1,10 @@
+# Generated by Cargo
+# will have compiled files and executables
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
diff --git a/racer-tracer/.projectile b/racer-tracer/.projectile
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/racer-tracer/.projectile
diff --git a/racer-tracer/Cargo.toml b/racer-tracer/Cargo.toml
new file mode 100644
index 0000000..e764f79
--- /dev/null
+++ b/racer-tracer/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "racer-tracer"
+version = "0.1.0"
+authors = ["Sakarias Johansson <sakarias.johansson@goodbyekansas.com>"]
+edition = "2021"
+
+[dependencies]
+minifb = "0.23"
+tokio = { version = "1.14.0", features = ["macros", "rt", "rt-multi-thread"] }
+thiserror = "1"
diff --git a/racer-tracer/src/error.rs b/racer-tracer/src/error.rs
new file mode 100644
index 0000000..f581b08
--- /dev/null
+++ b/racer-tracer/src/error.rs
@@ -0,0 +1,26 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum TracerError {
+    #[error("Unknown error: {message}")]
+    Unknown { message: String, exit_code: i32 },
+
+    #[error("Failed to create window: {0}")]
+    FailedToCreateWindow(String),
+
+    #[error("Failed to update window: {0}")]
+    FailedToUpdateWindow(String),
+}
+
+impl From<TracerError> for i32 {
+    fn from(tracer_error: TracerError) -> Self {
+        match tracer_error {
+            TracerError::Unknown {
+                message: _,
+                exit_code,
+            } => exit_code,
+            TracerError::FailedToCreateWindow(_) => 2,
+            TracerError::FailedToUpdateWindow(_) => 3,
+        }
+    }
+}
diff --git a/racer-tracer/src/main.rs b/racer-tracer/src/main.rs
new file mode 100644
index 0000000..959ea0a
--- /dev/null
+++ b/racer-tracer/src/main.rs
@@ -0,0 +1,78 @@
+#[macro_use]
+mod error;
+
+use minifb::{Key, Window, WindowOptions};
+
+fn hsv_to_rgb(H: f64, S: f64, V: f64) -> u32 {
+    let s: f64 = S / 100.0;
+    let v: f64 = V / 100.0;
+    let C: f64 = s * v;
+    let mut A: f64 = H / 60.0;
+    A %= 2.0f64;
+    let X: f64 = C * (1f64 - (A - 1f64).abs());
+    let m: f64 = v - C;
+
+    let mut r: f64;
+    let mut g: f64;
+    let mut b: f64;
+    if H >= 0.0 && H < 60.0 {
+        r = C;
+        g = X;
+        b = 0.0;
+    } else if H >= 60.0 && H < 120.0 {
+        r = X;
+        g = C;
+        b = 0.0;
+    } else if H >= 120.0 && H < 180.0 {
+        r = 0.0;
+        g = C;
+        b = X;
+    } else if H >= 180.0 && H < 240.0 {
+        r = 0.0;
+        g = X;
+        b = C;
+    } else if H >= 240.0 && H < 300.0 {
+        r = X;
+        g = 0.0;
+        b = C;
+    } else {
+        r = C;
+        g = 0.0;
+        b = X;
+    }
+
+    let red: u32 = ((r + m) * 255.0) as u32;
+    let green: u32 = ((g + m) * 255.0) as u32;
+    let blue: u32 = ((b + m) * 255.0) as u32;
+    ((red as u32) << 16) | ((green as u32) << 8) | blue as u32
+}
+
+async fn run(width: usize, height: usize) -> Result<(), error::TracerError> {
+    let mut screen_buffer: Vec<u32> = vec![0; width * height];
+    let mut window = Window::new("racer-tracer", width, height, WindowOptions::default())
+        .expect("Unable to create window");
+    window.limit_update_rate(Some(std::time::Duration::from_micros(16600)));
+
+    let mut count = 1;
+    while window.is_open() && !window.is_key_down(Key::Escape) {
+        count = (count + 1) % 360;
+        let color = hsv_to_rgb(count as f64, 100.0, 100.0);
+        for i in screen_buffer.iter_mut() {
+            *i = color;
+        }
+
+        window
+            .update_with_buffer(&screen_buffer, width, height)
+            .map_err(|e| error::TracerError::FailedToUpdateWindow(e.to_string()))?;
+    }
+
+    Ok(())
+}
+
+#[tokio::main]
+async fn main() {
+    if let Err(e) = run(640, 480).await {
+        eprintln!("{}", e);
+        std::process::exit(e.into())
+    }
+}