feat(Profpatsch/writers): add rustSimple writers r/2056

A bunch of writer functions wrapping the `buildRustCrate`
functionality of nixpkgs. Can be used to write inline rust code, or
rust code read from files with `builtins.readFile`.

Change-Id: I9d74e9381b858b485925e4dc3fbb7fc392877c0a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2318
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

1 files changed, 56 insertions, 2 deletions

diff --git a/users/Profpatsch/writers/default.nix b/users/Profpatsch/writers/default.nix
index 9863f0fae098..4eb354c305ab 100644
--- a/users/Profpatsch/writers/default.nix
+++ b/users/Profpatsch/writers/default.nix
@@ -1,6 +1,6 @@
 { depot, pkgs, lib, ... }:
 let
-  bins = depot.nix.getBins pkgs.coreutils ["printf" "mkdir" "cat"];
+  bins = depot.nix.getBins pkgs.coreutils ["printf" "mkdir" "cat" "ln"];
 
   inherit (depot.nix.yants) defun struct restrict attrs list string drv any;
 
@@ -11,7 +11,9 @@ let
           [ "E" "W" ])
       string;
   Libraries = defun [ (attrs any) (list drv) ];
-  python3 = name: {
+
+  python3 = {
+    name,
     libraries ? (_: []),
     flakeIgnore ? []
   }: pkgs.writers.writePython3 name {
@@ -62,12 +64,61 @@ let
       doCheck = false;
     };
 
+  rustSimple = args@{name, ...}: src:
+    linkTo name "${rustSimpleBin args src}/bin/${name}";
+
+  linkTo = name: path: depot.nix.runExecline.local name {} [
+    "importas" "out" "out"
+    bins.ln "-sT" path "$out"
+  ];
+
+  rustSimpleBin = {
+    name,
+    dependencies ? [],
+    ...
+  }@args: src: pkgs.buildRustCrate ({
+      pname = name;
+      version = "1.0.0";
+      crateName = name;
+      crateBin = [ name ];
+      dependencies = dependencies;
+      src = pkgs.runCommandLocal "write-main.rs" {
+        src = src;
+        passAsFile = [ "src" ];
+      } ''
+        mkdir -p $out/src/bin
+        cp "$srcPath" $out/src/bin/${name}.rs
+        find $out
+      '';
+    } // args);
+
+  rustSimpleLib = {
+    name,
+    dependencies ? [],
+    ...
+  }@args: src: pkgs.buildRustCrate ({
+      pname = name;
+      version = "1.0.0";
+      crateName = name;
+      dependencies = dependencies;
+      src = pkgs.runCommandLocal "write-lib.rs" {
+        src = src;
+        passAsFile = [ "src" ];
+      } ''
+        mkdir -p $out/src
+        cp "$srcPath" $out/src/lib.rs
+        find $out
+      '';
+    } // args);
+
   tests = import ./tests.nix {
     inherit
       depot
       pkgs
       python3
       python3Lib
+      rustSimpleLib
+      rustSimple
       ;
    };
 
@@ -75,6 +126,9 @@ in {
   inherit
     python3
     python3Lib
+    rustSimple
+    rustSimpleBin
+    rustSimpleLib
     tests
     ;
 }