REWRITE IT IN RUST

.gitignore

@@ -1,2 +1,3 @@
 /result-bin
 /result
+/target

Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "quickserv"
+version = "0.1.0"
+authors = ["Christine Dodrill <me@christine.website>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+log = "0"
+env_logger = "0.7"
+structopt = "0.3"
+tokio = { version = "0.2", features = ["macros"] }
+warp = "0.2"

default.nix

@@ -1,16 +1,13 @@
-{ pkgs ? import <nixpkgs> {} }:
+{ pkgs ? import <nixpkgs> { }, sources ? import ./nix/sources.nix
+, naersk ? import sources.naersk { } }:
 with pkgs;
 
-buildGoPackage rec {
-  name = "quickserv";
-  version = "1.0.0";
-  goPackagePath = "tulpa.dev/Xe/quickserv";
-  src = ./.;
-  goDeps = ./deps.nix;
-  preBuild = ''
-    export CGO_ENABLED=0
-    buildFlagsArray+=(-pkgdir "$TMPDIR")
-  '';
-
-  allowGoReference = false;
-}
+let
+  srcNoTarget = dir:
+    builtins.filterSource
+    (path: type: type != "directory" || builtins.baseNameOf path != "target")
+    dir;
+  naersk = pkgs.callPackage sources.naersk { };
+  src = srcNoTarget ./.;
+  remapPathPrefix = true;
+in naersk.buildPackage { inherit src remapPathPrefix; }

deps.nix

@@ -1,57 +0,0 @@
-# file generated from go.mod using vgo2nix (https://github.com/adisbladis/vgo2nix)
-[
-  {
-    goPackagePath = "github.com/davecgh/go-spew";
-    fetch = {
-      type = "git";
-      url = "https://github.com/davecgh/go-spew";
-      rev = "v1.1.1";
-      sha256 = "0hka6hmyvp701adzag2g26cxdj47g21x6jz4sc6jjz1mn59d474y";
-    };
-  }
-  {
-    goPackagePath = "github.com/facebookarchive/flagenv";
-    fetch = {
-      type = "git";
-      url = "https://github.com/facebookarchive/flagenv";
-      rev = "fcd59fca7456";
-      sha256 = "0c7fw4y4gmdrn66dx7la637lx0hvs1w27x9j12wdx037n51r078g";
-    };
-  }
-  {
-    goPackagePath = "github.com/facebookgo/ensure";
-    fetch = {
-      type = "git";
-      url = "https://github.com/facebookgo/ensure";
-      rev = "63f1cf65ac4c";
-      sha256 = "05vi49g2967i5awcb1z69i2n5b5hwn06682kw90x81hbxlr0px36";
-    };
-  }
-  {
-    goPackagePath = "github.com/facebookgo/flagenv";
-    fetch = {
-      type = "git";
-      url = "https://github.com/facebookgo/flagenv";
-      rev = "fcd59fca7456";
-      sha256 = "0c7fw4y4gmdrn66dx7la637lx0hvs1w27x9j12wdx037n51r078g";
-    };
-  }
-  {
-    goPackagePath = "github.com/facebookgo/stack";
-    fetch = {
-      type = "git";
-      url = "https://github.com/facebookgo/stack";
-      rev = "751773369052";
-      sha256 = "07yr05mz7h007ldpij90zjflwgixp148sbyrdlh1fj5bikr4p8m3";
-    };
-  }
-  {
-    goPackagePath = "github.com/facebookgo/subset";
-    fetch = {
-      type = "git";
-      url = "https://github.com/facebookgo/subset";
-      rev = "c811ad88dec4";
-      sha256 = "1sjczgmq26mgqvh7267saypnn4sfdjx467wsm1pgdhyss77mc650";
-    };
-  }
-]

docker.nix

@@ -3,12 +3,12 @@
 let
   pkgs = import <nixpkgs> { };
   callPackage = pkgs.lib.callPackageWith pkgs;
-  printerfacts = callPackage ./default.nix { };
+  quickserv = callPackage ./default.nix { };
 
   dockerImage = pkg:
     pkgs.dockerTools.buildLayeredImage {
       name = "xena/quickserv";
-      tag = "latest";
+      tag = "${quickserv.version}";
 
       contents = [ pkg ];
 
@@ -18,4 +18,4 @@ let
       };
     };
 
-in dockerImage printerfacts
+in dockerImage quickserv

go.mod

@@ -1,12 +0,0 @@
-module tulpa.dev/Xe/quickserv
-
-go 1.13
-
-require (
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/facebookarchive/flagenv v0.0.0-20160425205200-fcd59fca7456
-	github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c // indirect
-	github.com/facebookgo/flagenv v0.0.0-20160425205200-fcd59fca7456 // indirect
-	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
-	github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4 // indirect
-)

go.sum

@@ -1,12 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/facebookarchive/flagenv v0.0.0-20160425205200-fcd59fca7456 h1:1NzATV1A9LeTWAuAJGd7vE/wYSO08EJQTrwKcBBR6Cw=
-github.com/facebookarchive/flagenv v0.0.0-20160425205200-fcd59fca7456/go.mod h1:Lbo+w7sC1xznzryrqUDoBBT2nLKV9JnDOzdiVMHYX/8=
-github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c h1:8ISkoahWXwZR41ois5lSJBSVw4D0OV19Ht/JSTzvSv0=
-github.com/facebookgo/ensure v0.0.0-20200202191622-63f1cf65ac4c/go.mod h1:Yg+htXGokKKdzcwhuNDwVvN+uBxDGXJ7G/VN1d8fa64=
-github.com/facebookgo/flagenv v0.0.0-20160425205200-fcd59fca7456 h1:CkmB2l68uhvRlwOTPrwnuitSxi/S3Cg4L5QYOcL9MBc=
-github.com/facebookgo/flagenv v0.0.0-20160425205200-fcd59fca7456/go.mod h1:zFhibDvPDWmtk4dAQ05sRobtyoffEHygEt3wSNuAzz8=
-github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 h1:JWuenKqqX8nojtoVVWjGfOF9635RETekkoH6Cc9SX0A=
-github.com/facebookgo/stack v0.0.0-20160209184415-751773369052/go.mod h1:UbMTZqLaRiH3MsBH8va0n7s1pQYcu3uTb8G4tygF4Zg=
-github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4 h1:7HZCaLC5+BZpmbhCOZJ293Lz68O7PYrF2EzeiFMwCLk=
-github.com/facebookgo/subset v0.0.0-20200203212716-c811ad88dec4/go.mod h1:5tD+neXqOorC30/tWg0LCSkrqj/AR6gu8yY8/fpw1q0=

main.go

@@ -1,23 +0,0 @@
-// Command quickserv serves a folder of files over HTTP quickly.
-package main
-
-import (
-	"flag"
-	"log"
-	"net/http"
-
-	"github.com/facebookarchive/flagenv"
-)
-
-var (
-	port = flag.String("port", "3000", "port to use")
-	dir  = flag.String("dir", ".", "directory to serve")
-)
-
-func main() {
-	flagenv.Parse()
-	flag.Parse()
-	http.Handle("/", http.FileServer(http.Dir(*dir)))
-	log.Printf("Serving %s on port %s", *dir, *port)
-	log.Fatal(http.ListenAndServe(":"+*port, nil))
-}

nix/sources.json

@@ -0,0 +1,14 @@
+{
+    "naersk": {
+        "branch": "master",
+        "description": "Build rust crates in Nix. No configuration, no code generation, no IFD. Sandbox friendly.",
+        "homepage": "",
+        "owner": "nmattia",
+        "repo": "naersk",
+        "rev": "a82fd7dc31a58c462b6dfa9d9d886fa2cc75dfd4",
+        "sha256": "00bjwir52y6jbf0b22qy9qxramw35k5fc7kp9hymr1zgpmw9kbwg",
+        "type": "tarball",
+        "url": "https://github.com/nmattia/naersk/archive/a82fd7dc31a58c462b6dfa9d9d886fa2cc75dfd4.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}

nix/sources.nix

@@ -0,0 +1,134 @@
+# This file has been generated by Niv.
+
+let
+
+  #
+  # The fetchers. fetch_<type> fetches specs of type <type>.
+  #
+
+  fetch_file = pkgs: spec:
+    if spec.builtin or true then
+      builtins_fetchurl { inherit (spec) url sha256; }
+    else
+      pkgs.fetchurl { inherit (spec) url sha256; };
+
+  fetch_tarball = pkgs: spec:
+    if spec.builtin or true then
+      builtins_fetchTarball { inherit (spec) url sha256; }
+    else
+      pkgs.fetchzip { inherit (spec) url sha256; };
+
+  fetch_git = spec:
+    builtins.fetchGit { url = spec.repo; inherit (spec) rev ref; };
+
+  fetch_builtin-tarball = spec:
+    builtins.trace
+      ''
+        WARNING:
+          The niv type "builtin-tarball" will soon be deprecated. You should
+          instead use `builtin = true`.
+
+          $ niv modify <package> -a type=tarball -a builtin=true
+      ''
+      builtins_fetchTarball { inherit (spec) url sha256; };
+
+  fetch_builtin-url = spec:
+    builtins.trace
+      ''
+        WARNING:
+          The niv type "builtin-url" will soon be deprecated. You should
+          instead use `builtin = true`.
+
+          $ niv modify <package> -a type=file -a builtin=true
+      ''
+      (builtins_fetchurl { inherit (spec) url sha256; });
+
+  #
+  # Various helpers
+  #
+
+  # The set of packages used when specs are fetched using non-builtins.
+  mkPkgs = sources:
+    let
+      sourcesNixpkgs =
+        import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) {};
+      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 spec
+    else if spec.type == "tarball" then fetch_tarball pkgs spec
+    else if spec.type == "git" then fetch_git spec
+    else if spec.type == "builtin-tarball" then fetch_builtin-tarball spec
+    else if spec.type == "builtin-url" then fetch_builtin-url spec
+    else
+      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
+
+  # Ports of functions for older nix versions
+
+  # a Nix version of mapAttrs if the built-in doesn't exist
+  mapAttrs = builtins.mapAttrs or (
+    f: set: with builtins;
+    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
+  );
+
+  # fetchTarball version that is compatible between all the versions of Nix
+  builtins_fetchTarball = { url, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchTarball;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchTarball { inherit url; }
+      else
+        fetchTarball attrs;
+
+  # fetchurl version that is compatible between all the versions of Nix
+  builtins_fetchurl = { url, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchurl;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchurl { inherit url; }
+      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 = fetch config.pkgs name spec; }
+    ) config.sources;
+
+  # The "config" used by the fetchers
+  mkConfig =
+    { sourcesFile ? ./sources.json
+    , sources ? builtins.fromJSON (builtins.readFile sourcesFile)
+    , pkgs ? mkPkgs sources
+    }: 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); }

shell.nix

@@ -1,2 +1,17 @@
 let pkgs = import <nixpkgs> { };
-in pkgs.mkShell { buildInputs = with pkgs; [ go vgo2nix ]; }
+in pkgs.mkShell {
+  buildInputs = with pkgs; [
+    # go
+    go
+    goimports
+    nur.repos.xe.gopls
+    vgo2nix
+
+    # rust
+    cargo
+    cargo-watch
+    rls
+    rustc
+    rustfmt
+  ];
+}

src/main.rs

@@ -0,0 +1,26 @@
+use std::path::PathBuf;
+use structopt::StructOpt;
+
+/// A basic example
+#[derive(StructOpt, Debug)]
+#[structopt(name = "quickserv")]
+struct Opt {
+    // The HTTP port to listen on
+    #[structopt(short, long, env="PORT", default_value="9001")]
+    port: u16,
+
+    // The path to serve
+    #[structopt(short, long, env="DIR", default_value=".")]
+    dir: PathBuf,
+}
+
+#[tokio::main]
+async fn main() {
+    env_logger::init();
+    let opt = Opt::from_args();
+    log::info!("serving {:?} on port {}", opt.dir, opt.port);
+
+    warp::serve(warp::fs::dir(opt.dir))
+        .run(([0, 0, 0, 0], opt.port))
+        .await;
+}